SN54LV123A, SN74LV123A
DUAL RETRIGGERABLE MONOSTABLE MULTIVIBRATORS
WITH SCHMITT-TRIGGER INPUTS
SCLS393O − APRIL 1998 − REVISED OCTOBER 2005
1
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
D2-V to 5.5-V VCC Operation
DMax tpd of 11 ns at 5 V
DTypical VOLP (Output Ground Bounce)
<0.8 V at VCC = 3.3 V, TA = 25°C
DTypical VOHV (Output VOH Undershoot)
>2.3 V at VCC = 3.3 V, TA = 25°C
DSupport Mixed-Mode Voltage Operation on
All Ports
DSchmitt-Trigger Circuitry on A, B, and CLR
Inputs for Slow Input Transition Rates
DEdge Triggered From Active-High or
Active-Low Gated Logic Inputs
DIoff Supports Partial-Power-Down Mode
Operation
DRetriggerable for Very Long Output Pulses,
up to 100% Duty Cycle
DOverriding Clear Terminates Output Pulse
DGlitch-Free Power-Up Reset on Outputs
DLatch-Up Performance Exceeds 100 mA Per
JESD 78, Class II
DESD Protection Exceeds JESD 22
− 2000-V Human-Body Model (A114-A)
− 200-V Machine Model (A115-A)
− 1000-V Charged-Device Model (C101)
SN54LV123A ...J OR W PACKAGE
SN74LV123A . . . D, DB, DGV, NS,
OR PW PACKAGE
(TOP VIEW)
SN54LV123A . . . FK PACKAGE
(TOP VIEW)
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
1A
1B
1CLR
1Q
2Q
2Cext
2Rext/Cext
GND
VCC
1Rext/Cext
1Cext
1Q
2Q
2CLR
2B
2A
3212019
910111213
4
5
6
7
8
18
17
16
15
14
1Cext
1Q
NC
2Q
2CLR
1CLR
1Q
NC
2Q
2Cext
1B
1A
NC
2A
2B
V
1R
2R
GND
NC
CC
NC − No internal connection
ext/Cext
ext/Cext
SN74LV123A . . . RGY PACKAGE
(TOP VIEW)
116
89
2
3
4
5
6
7
15
14
13
12
11
10
1Rext/Cext
1Cext
1Q
2Q
2CLR
2B
1B
1CLR
1Q
2Q
2Cext
2Rext/Cext
1A
2A V
GND
CC
description/ordering information
TheLV123A devices are dual retriggerable monostable multivibrators designed for 2-V to 5.5-V VCC operation.
These edge-triggered multivibrators feature output pulse-duration control by three methods. In the first method,
the A input is low and the B input goes high. In the second method, the B input is high and the A input goes low.
In the third method, the A input is low, the B input is high, and the clear (CLR) input goes high.
The output pulse duration is programmable by selecting external resistance and capacitance values. The
external timing capacitor must be connected between Cext and Rext/Cext (positive) and an external resistor
connected between Rext/Cext and VCC. To obtain variable pulse durations, connect an external variable
resistance between Rext/Cext and VCC. The output pulse duration also can be reduced by taking CLR low.
Pulse triggering occurs at a particular voltage level and is not directly related to the transition time of the input
pulse. The A, B, and CLR inputs have Schmitt triggers with sufficient hysteresis to handle slow input transition
rates with jitter-free triggering at the outputs.
Once triggered, the basic pulse duration can be extended by retriggering the gated low-level-active (A) or
high-level-active (B) input. Pulse duration can be reduced by taking CLR low. The input/output timing diagram
illustrates pulse control by retriggering the inputs and early clearing.
Copyright © 2005, Texas Instruments Incorporated
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
UNLESS OTHERWISE NOTED this document contains PRODUCTION
DATA information current as of publication date. Products conform to
specifications per the terms of Texas Instruments standard warranty.
Production processing does not necessarily include testing of all
parameters.
SN54LV123A, SN74LV123A
DUAL RETRIGGERABLE MONOSTABLE MULTIVIBRATORS
WITH SCHMITT-TRIGGER INPUTS
SCLS393O − APRIL 1998 − REVISED OCTOBER 2005
2POST OFFICE BOX 655303 DALLAS, TEXAS 75265
description/ordering information (continued)
During power up, Q outputs are in the low state, and Q outputs are in the high state. The outputs are glitch free,
without applying a reset pulse.
These devices are fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the
outputs, preventing damaging current backflow through the devices when they are powered down.
Pin assignments for these devices are identical to those of the ’AHC123A and ’AHCT123A devices for
interchangeability, when allowed.
ORDERING INFORMATION
TAPACKAGEORDERABLE
PART NUMBER
TOP-SIDE
MARKING
QFN − RGY Reel of 1000 SN74LV123ARGYR LV123A
SOIC D
Tube of 40 SN74LV123AD
LV123A
SOIC − D Reel of 2500 SN74LV123ADR LV123A
SOP − NS Reel of 2000 SN74LV123ANSR 74LV123A
−40°C to 85°CSSOP − DB Reel of 2000 SN74LV123ADBR LV123A
40 C
to
85 C
Tube of 90 SN74LV123APW
TSSOP − PW Reel of 2000 SN74LV123APWR LV123A
TSSOP
PW
Reel of 250 SN74LV123APWT
LV123A
TVSOP − DGV Reel of 2000 SN74LV123ADGVR LV123A
CDIP − J Tube of 25 SNJ54LV123AJ SNJ54LV123AJ
−55°C to 125°CCFP − W Tube of 150 SNJ54LV123AW SNJ54LV123AW
55 C
to
125 C
LCCC − FK Tube of 55 SNJ54LV123AFK SNJ54LV123AFK
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design
guidelines are available at www.ti.com/sc/package.
FUNCTION TABLE
(each multivibrator)
INPUTS OUTPUTS
CLR A B Q Q
L X X L H
XHXL
H
XXLL
H
H L
HH
L H
These outputs are based on the
assumption that the indicated
steady-state conditions at the A and
B inputs have been set up long enough to
complete any pulse started before the
setup.
SN54LV123A, SN74LV123A
DUAL RETRIGGERABLE MONOSTABLE MULTIVIBRATORS
WITH SCHMITT-TRIGGER INPUTS
SCLS393O − APRIL 1998 − REVISED OCTOBER 2005
3
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
logic diagram, each multivibrator (positive logic)
CLR
Cext
Rext/Cext
R
B
A
Q
Q
input/output timing diagram
A
B
CLR
Q
Q
twtwtw + trr
trr
Rext/Cext
SN54LV123A, SN74LV123A
DUAL RETRIGGERABLE MONOSTABLE MULTIVIBRATORS
WITH SCHMITT-TRIGGER INPUTS
SCLS393O − APRIL 1998 − REVISED OCTOBER 2005
4POST OFFICE BOX 655303 DALLAS, TEXAS 75265
absolute maximum ratings over operating free-air temperature (unless otherwise noted)
Supply voltage range, VCC −0.5 V to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage range, VI (see Note 1) −0.5 V to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Voltage range applied to any output in the high-impedance
or power-off state, VO (see Note 1) −0.5 V to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output voltage range in high or low state, VO (see Notes 1 and 2) −0.5 V to VCC + 0.5 V. . . . . . . . . . . . . . . . .
Output voltage range in power-off state, VO (see Note 1) −0.5 V to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input clamp current, IIK (VI < 0) −20 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output clamp current, IOK (VO < 0) −50 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous output current, IO (VO = 0 to VCC) ±25 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous current through VCC or GND ±50 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Package thermal impedance, θJA (see Note 3): D package 73°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(see Note 3): DB package 82°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(see Note 3): DGV package 120°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(see Note 3): NS package 64°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(see Note 3): PW package 108°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(see Note 4): RGY package 39°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range, Tstg −65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTES: 1. The input and output negative-voltage ratings may be exceeded if the input and output current ratings are observed.
2. This value is limited to 5.5 V maximum.
3. The package thermal impedance is calculated in accordance with JESD 51-7.
4. The package thermal impedance is calculated in accordance with JESD 51-5.
SN54LV123A, SN74LV123A
DUAL RETRIGGERABLE MONOSTABLE MULTIVIBRATORS
WITH SCHMITT-TRIGGER INPUTS
SCLS393O − APRIL 1998 − REVISED OCTOBER 2005
5
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
recommended operating conditions (see Note 5)
SN54LV123A SN74LV123A
UNIT
MIN MAX MIN MAX UNIT
VCC Supply voltage 2 5.5 2 5.5 V
VCC = 2 V 1.5 1.5
V
High level input voltage
VCC = 2.3 V to 2.7 V VCC × 0.7 VCC × 0.7
V
VIH High-level input voltage VCC = 3 V to 3.6 V VCC × 0.7 VCC × 0.7 V
VCC = 4.5 V to 5.5 V VCC × 0.7 VCC × 0.7
VCC = 2 V 0.5 0.5
V
Low level input voltage
VCC = 2.3 V to 2.7 V VCC × 0.3 VCC × 0.3
V
VIL Low-level input voltage VCC = 3 V to 3.6 V VCC × 0.3 VCC × 0.3 V
VCC = 4.5 V to 5.5 V VCC × 0.3 VCC × 0.3
VIInput voltage 0 5.5 0 5.5 V
VOOutput voltage 0 VCC 0 VCC V
VCC = 2 V −50 −50 μA
I
High level output current
VCC = 2.3 V to 2.7 V −2 −2
IOH High-level output current VCC = 3 V to 3.6 V −6 −6 mA
VCC = 4.5 V to 5.5 V −12 −12
mA
VCC = 2 V 50 50 μA
I
Low level output current
VCC = 2.3 V to 2.7 V 2 2
IOL Low-level output current VCC = 3 V to 3.6 V 6 6 mA
VCC = 4.5 V to 5.5 V 12 12
mA
R
External timing resistance
VCC = 2 V 5k 5k
Ω
Rext External timing resistance VCC 3 V 1k 1k Ω
Cext External timing capacitance No restriction No restriction pF
Δt/ΔVCC Power-up ramp rate 1 1 ms/V
TAOperating free-air temperature −55 125 −40 85 °C
NOTE 5: Unused Rext/Cext terminals should be left unconnected. All remaining unused inputs of the device must be held at VCC or GND to ensure
proper device operation. Refer to the TI application report, Implications of Slow or Floating CMOS Inputs, literature number SCBA004.
PRODUCT PREVIEW information concerns products in the formative or
design phase of development. Characteristic data and other
specifications are design goals. Texas Instruments reserves the right to
change or discontinue these products without notice.
SN54LV123A, SN74LV123A
DUAL RETRIGGERABLE MONOSTABLE MULTIVIBRATORS
WITH SCHMITT-TRIGGER INPUTS
SCLS393O − APRIL 1998 − REVISED OCTOBER 2005
6POST OFFICE BOX 655303 DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
SN54LV123A SN74LV123A
UNIT
PARAMETER TEST CONDITIONS VCC MIN TYP MAX MIN TYP MAX UNIT
IOH = −50 μA2 V to 5.5 V VCC−0.1 VCC−0.1
V
IOH = −2 mA 2.3 V 2 2
V
VOH IOH = −6 mA 3 V 2.48 2.48 V
IOH = −12 mA 4.5 V 3.8 3.8
IOL = 50 μA2 V to 5.5 V 0.1 0.1
V
IOL = 2 mA 2.3 V 0.4 0.4
V
VOL IOL = 6 mA 3 V 0.44 0.44 V
IOL = 12 mA 4.5 V 0.55 0.55
Rext/CextVI = 5.5 V or GND 2 V to 5.5 V ±2.5 ±2.5
II
AB d CLR
V55VorGND
0±1±1μA
I
A, B, and CLR VI = 5.5 V or GND 0 to 5.5 V ±1±1
μ
ICC Quiescent VI = VCC or GND, IO = 0 5.5 V 20 20 μA
2.3 V 220 220
I
Active state VI = V
CC
or GND, 3 V 280 280
A
ICC
Active
state
(per circuit)
VI
=
VCC
or
GND
,
Rext/Cext = 0.5 VCC 4.5 V 650 650 μA
CC
5.5 V 975 975
Ioff VI or VO = 0 to 5.5 V 0 5 μA
C
V V or GND
3.3 V 1.9 1.9
pF
CiVI = VCC or GND 5 V 1.9 1.9 pF
This test is performed with the terminal in the off-state condition.
timing requirements over recommended operating free-air temperature range, VCC = 2.5 V ± 0.2 V
(unless otherwise noted) (see Figure 1)
TEST CONDITIONS
TA = 25°C SN54LV123A SN74LV123A
UNIT
TEST CONDITIONS MIN TYP MAX MIN MAX MIN MAX UNIT
t
Pulse CLR 6 6.5 6.5
ns
tw
Pulse
duration A or B trigger 6 6.5 6.5 ns
t
Pulse retrigger time
R1kΩ
Cext = 100 pF 94 ns
trr Pulse retrigger time Rext = 1 kΩCext = 0.01 mF2 ms
See retriggering data in the application information section.
timing requirements over recommended operating free-air temperature range, VCC = 3.3 V ± 0.3 V
(unless otherwise noted) (see Figure 1)
TEST CONDITIONS
TA = 25°C SN54LV123A SN74LV123A
UNIT
TEST CONDITIONS MIN TYP MAX MIN MAX MIN MAX UNIT
t
Pulse CLR 5 5 5
ns
tw
Pulse
duration A or B trigger 5 5 5 ns
t
Pulse retrigger time
R1kΩ
Cext = 100 pF 76 ns
trr Pulse retrigger time Rext = 1 kΩCext = 0.01 mF1.8 ms
See retriggering data in the application information section.
PRODUCT PREVIEW information concerns products in the formative or
design phase of development. Characteristic data and other
specifications are design goals. Texas Instruments reserves the right to
change or discontinue these products without notice.
SN54LV123A, SN74LV123A
DUAL RETRIGGERABLE MONOSTABLE MULTIVIBRATORS
WITH SCHMITT-TRIGGER INPUTS
SCLS393O − APRIL 1998 − REVISED OCTOBER 2005
7
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
timing requirements over recommended operating free-air temperature range, VCC = 5 V ± 0.5 V
(unless otherwise noted) (see Figure 1)
TEST CONDITIONS
TA = 25°C SN54LV123A SN74LV123A
UNIT
TEST CONDITIONS MIN TYP MAX MIN MAX MIN MAX UNIT
t
Pulse CLR 5 5 5
ns
tw
Pulse
duration A or B trigger 5 5 5 ns
t
Pulse retrigger time
R1kΩ
Cext = 100 pF 59 ns
trr Pulse retrigger time Rext = 1 kΩCext = 0.01 mF1.5 ms
See retriggering data in the application information section.
switching characteristics over recommended operating free-air temperature range,
VCC = 2.5 V ±0.2 V (unless otherwise noted) (see Figure 1)
PARAMETER
FROM TO TEST TA = 25°C SN54LV123A SN74LV123A
UNIT
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
TEST
CONDITIONS MIN TYP MAX MIN MAX MIN MAX UNIT
A or B Q or Q 14.5* 31.4* 1* 37* 1 37
tpd CLR Q or Q CL = 15 pF 13* 25* 1* 29.5* 1 29.5 ns
pd
CLR trigger Q or Q
Lp
15.1* 33.4* 1* 39* 1 39
A or B Q or Q 16.6 36 1 42 1 42
tpd CLR Q or Q CL = 50 pF 14.7 32.8 1 34.5 1 34.5 ns
pd
CLR trigger Q or Q
Lp
17.4 38 1 44 1 44
CL = 50 pF,
Cext = 28 pF,
Rext = 2 kΩ
197 260 320 320 ns
twQ or Q
CL = 50 pF,
Cext = 0.01 μF,
Rext = 10 kΩ
90 100 110 90 110 90 110 ms
CL = 50 pF,
Cext = 0.1 μF,
Rext = 10 kΩ
0.9 1 1.1 0.9 1.1 0.9 1.1 ms
Δtw§CL = 50 pF ±1 %
* On products compliant to MIL-PRF-38535, this parameter is not production tested.
tw = Duration of pulse at Q and Q outputs
§Δtw = Output pulse-duration variation (Q and Q) between circuits in same package
PRODUCT PREVIEW information concerns products in the formative or
design phase of development. Characteristic data and other
specifications are design goals. Texas Instruments reserves the right to
change or discontinue these products without notice.
SN54LV123A, SN74LV123A
DUAL RETRIGGERABLE MONOSTABLE MULTIVIBRATORS
WITH SCHMITT-TRIGGER INPUTS
SCLS393O − APRIL 1998 − REVISED OCTOBER 2005
8POST OFFICE BOX 655303 DALLAS, TEXAS 75265
switching characteristics over recommended operating free-air temperature range,
VCC = 3.3 V ±0.3 V (unless otherwise noted) (see Figure 1)
PARAMETER
FROM TO TEST TA = 25°C SN54LV123A SN74LV123A
UNIT
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
TEST
CONDITIONS MIN TYP MAX MIN MAX MIN MAX UNIT
A or B Q or Q 10.2* 20.6* 1* 24* 1 24
tpd CLR Q or Q CL = 15 pF 9.3* 15.8* 1* 18.5* 1 18.5 ns
pd
CLR trigger Q or Q
Lp
10.6* 22.4* 1* 26* 1 26
A or B Q or Q 11.8 24.1 1 27.5 1 27.5
tpd CLR Q or Q CL = 50 pF 10.5 19.3 1 22 1 22 ns
pd
CLR trigger Q or Q
Lp
12.3 25.9 1 29.5 1 29.5
CL = 50 pF,
Cext = 28 pF,
Rext = 2 kΩ
182 240 300 300 ns
twQ or Q
CL = 50 pF,
Cext = 0.01 μF,
Rext = 10 kΩ
90 100 110 90 110 90 110 ms
CL = 50 pF,
Cext = 0.1 μF,
Rext = 10 kΩ
0.9 1 1.1 0.9 1.1 0.9 1.1 ms
ΔtwCL = 50 pF ±1 %
* On products compliant to MIL-PRF-38535, this parameter is not production tested.
tw = Duration of pulse at Q and Q outputs
Δtw = Output pulse-duration variation (Q and Q) between circuits in same package
switching characteristics over recommended operating free-air temperature range,
VCC = 5 V ± 0.5 V (unless otherwise noted) (see Figure 1)
PARAMETER
FROM TO TEST TA = 25°C SN54LV123A SN74LV123A
UNIT
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
TEST
CONDITIONS MIN TYP MAX MIN MAX MIN MAX UNIT
A or B Q or Q 7.1* 12* 1* 14* 1 14
tpd CLR Q or Q CL = 15 pF 6.5* 9.4* 1* 11* 111 ns
pd
CLR trigger Q or Q
Lp
7.4* 12.9* 1* 15* 1 15
A or B Q or Q 8.3 14 1 16 1 16
tpd CLR Q or Q CL = 50 pF 7.4 11.4 1 13 1 13 ns
pd
CLR trigger Q or Q
Lp
8.7 14.9 1 17 1 17
CL = 50 pF,
Cext = 28 pF,
Rext = 2 kΩ
167 200 240 240 ns
twQ or Q
CL = 50 pF,
Cext = 0.01 μF,
Rext = 10 kΩ
90 100 110 90 110 90 110 ms
CL = 50 pF,
Cext = 0.1 μF,
Rext = 10 kΩ
0.9 1 1.1 0.9 1.1 0.9 1.1 ms
Δtw±1 %
* On products compliant to MIL-PRF-38535, this parameter is not production tested.
tw = Duration of pulse at Q and Q outputs
Δtw = Output pulse-duration variation (Q and Q) between circuits in same package
PRODUCT PREVIEW information concerns products in the formative or
design phase of development. Characteristic data and other
specifications are design goals. Texas Instruments reserves the right to
change or discontinue these products without notice.
SN54LV123A, SN74LV123A
DUAL RETRIGGERABLE MONOSTABLE MULTIVIBRATORS
WITH SCHMITT-TRIGGER INPUTS
SCLS393O − APRIL 1998 − REVISED OCTOBER 2005
9
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
operating characteristics, TA = 25°C
PARAMETER TEST CONDITIONS VCC TYP UNIT
C
Power dissipation capacitance
f 10 MHz
3.3 V 44
pF
Cpd Power dissipation capacitance CL = 50 pF, f = 10 MHz 5 V 49 pF
PARAMETER MEASUREMENT INFORMATION
NOTES: A. CL includes probe and jig capacitance.
B. All input pulses are supplied by generators having the following characteristics: PRR 1 MHz, ZO = 50 Ω, tr +3 ns, tf + 3 ns.
C. The outputs are measured one at a time, with one input transition per measurement.
50% VCC
tPLH
tPHL
VOH
VOL
VCC
50% VCC
50% VCC
VCC
Input A
(see Note B) 50% VCC
0 V
0 V
In-Phase
Output
Out-of-Phase
Output
VOLTAGE WAVEFORMS
DELAY TIMES
Input B
(see Note B)
VOL
VOH
LOAD CIRCUIT
Test
Point
CL
(see Note A)
From Output
Under Test
50% VCC
tPLH
tPHL
tPHL
tPLH
VOH
VOH
VOL
VOL
VCC
0 V
50% VCC
Input CLR
(see Note B)
Out-of-Phase
Output
In-Phase
Output
VOLTAGE WAVEFORMS
DELAY TIMES
50% VCC
50% VCC
50% VCC 50% VCC
VCC
0 V
tw
VOLTAGE WAVEFORMS
PULSE DURATION
Inputs or
Outputs 50% VCC
50% VCC
Figure 1. Load Circuit and Voltage Waveforms
SN54LV123A, SN74LV123A
DUAL RETRIGGERABLE MONOSTABLE MULTIVIBRATORS
WITH SCHMITT-TRIGGER INPUTS
SCLS393O − APRIL 1998 − REVISED OCTOBER 2005
10 POST OFFICE BOX 655303 DALLAS, TEXAS 75265
APPLICATION INFORMATION
Figure 2
OUTPUT PULSE DURATION
vs
EXTERNAL TIMING CAPACITANCE
1.00E+07
tw− Output Pulse Duration − ns
1.00E+06
1.00E+05
1.00E+04
1.00E+03
1.00E+02
CT − External Timing Capacitance − pF
101102103104105
VCC = 3 V
TA = 25°C
RT = 1 MΩ
RT = 100 kΩ
RT = 10 kΩ
RT = 1 kΩ
Figure 3
OUTPUT PULSE DURATION
vs
EXTERNAL TIMING CAPACITANCE
1.00E+07
tw− Output Pulse Duration − ns
1.00E+06
1.00E+05
1.00E+04
1.00E+03
1.00E+02
CT − External Timing Capacitance − pF
101102103104105
RT = 1 MΩ
RT = 100 kΩ
RT = 10 kΩ
RT = 1 kΩ
VCC = 4.5 V
TA = 25°C
Operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied.
SN54LV123A, SN74LV123A
DUAL RETRIGGERABLE MONOSTABLE MULTIVIBRATORS
WITH SCHMITT-TRIGGER INPUTS
SCLS393O − APRIL 1998 − REVISED OCTOBER 2005
11
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
APPLICATION INFORMATION
11010
2103104105106107
1.00E+00
1.00E+01
1.00E+02
1.00E+03
1.00E+04
1.00E+05
1.00E+06
1.00E+07
1.00E+08
1.00E+09
RT = 1k Ω
RT = 5k Ω
RT = 10k Ω
RT = 80k Ω
RT = 150k Ω
RT = 200k Ω
VCC = 5 V
TA = 25°C
Output Pulse Duration − ns
w
t
CT − External Timing Capacitance − pF
Figure 4. Output Pulse Duration vs External Timing Capacitance
tw = 866 ns at:
VCC = 5 V
RT = 10 kΩ
CT = 50 pF
TA = 25°C
−60 −40 −20 0 20 40 60 80 100 120 140 160
VCC = 2.5 V
VCC = 3 V
VCC = 3.5 V
VCC = 4 V
VCC = 5 V
VCC = 6 V
VCC = 7 V
180
−6%
−4%
−2%
0%
2%
4%
6%
8%
10%
12%
14%
Temperature − °C
Variation in Output Pulse Duration
Figure 5. Variations in Output Pulse Duration vs Temperature
Operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied.
SN54LV123A, SN74LV123A
DUAL RETRIGGERABLE MONOSTABLE MULTIVIBRATORS
WITH SCHMITT-TRIGGER INPUTS
SCLS393O − APRIL 1998 − REVISED OCTOBER 2005
12 POST OFFICE BOX 655303 DALLAS, TEXAS 75265
APPLICATION INFORMATION
Figure 6
MINIMUM TRIGGER TIME
vs
VCC CHARACTERISTICS
RT = 1 kΩ
TA = 25°C
10.00
0
1.00
0.10
0.01 12 3456
CT = 0.01 μF
CT = 1000 pF
CT = 100 pF
VCC − Supply Voltage − V
Minimum Retrigger Time μs
rr t
Figure 7
1.20
1.15
1.10
1.05
1.00
0.95
0.90
1.5 2 2.5 3 3.5 4 4.5 5 5.5 6
RT = 10 kΩ
TA = 25°C
tW = K ×CT ×RT
VCC − Supply Voltage − V
OUTPUT PULSE-DURATION CONSTANT
vs
SUPPLY VOLTAGE
Output Pulse-Duration Constant − K
CT = 1000 pF
CT = 0.01 μF
CT = 0.1 μF
Figure 8
1.00 1.50 2.00 2.50 3.00 3.50 4.00 4.50
0.00001
0.0001
0.001
TA = 25°C
VCC = 5 V
For Capacitor Values of
0.001 μF or Greater,
K = 1.0
(K is Independent of R)
Multiplier Factor − K
EXTERNAL CAPACITANCE
vs
MULTIPLIER FACTOR
CT− External Capacitor Value − μF
Figure 9
tw − Output Pulse Duration
Relative Frequency of Occurance
DISTRIBUTION OF UNITS
vs
OUTPUT PULSE DURATION
Mean = 856 ns
Median = 856 ns
Std. Dev. = 3.5 ns
VCC = 5 V
TA = 25°C
CT = 50 pF
RT = 10 kW
−3 Std. Dev. +3 Std. Dev.
Median
99% of Data Units
Operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied.
SN54LV123A, SN74LV123A
DUAL RETRIGGERABLE MONOSTABLE MULTIVIBRATORS
WITH SCHMITT-TRIGGER INPUTS
SCLS393O − APRIL 1998 − REVISED OCTOBER 2005
13
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
APPLICATION INFORMATION
caution in use
To prevent malfunctions due to noise, connect a high-frequency capacitor between VCC and GND, and keep
the wiring between the external components and Cext and Rext/Cext terminals as short as possible.
power-down considerations
Large values of Cext can cause problems when powering down the ’LV123A devices because of the amount
of energy stored in the capacitor. When a system containing this device is powered down, the capacitor can
discharge from VCC through the protection diodes at pin 2 or pin 14. Current through the input protection diodes
must be limited to 30 mA; therefore, the turn-off time of the VCC power supply must not be faster than
t = VCC × Cext/30 mA. For example, if VCC = 5 V and Cext = 15 pF, the VCC supply must turn off no faster than
t = (5 V) × (15 pF)/30 mA = 2.5 ns. Usually, this is not a problem because power supplies are heavily filtered
and cannot discharge at this rate. When a more rapid decrease of VCC to zero occurs, the ’LV123A devices can
sustain damage. To avoid this possibility, use external clamping diodes.
output pulse duration
The output pulse duration, tw, is determined primarily by the values of the external capacitance (CT) and timing
resistance (RT). The timing components are connected as shown in Figure 10.
VCC
RT
CT
To Rext/Cext
Terminal
To Cext
Terminal
Figure 10. Timing-Component Connections
The pulse duration is given by:
tw+K RT CT
if CT is 1000 pF, K = 1.0 or
if CT is <1000 pF, K can be determined from Figure 8
where:
tw= pulse duration in ns
RT= external timing resistance in kΩ
CT= external capacitance in pF
K = multiplier factor
Equation 1 and Figure 3 can be used to determine values for pulse duration, external resistance, and external
capacitance.
(1)
SN54LV123A, SN74LV123A
DUAL RETRIGGERABLE MONOSTABLE MULTIVIBRATORS
WITH SCHMITT-TRIGGER INPUTS
SCLS393O − APRIL 1998 − REVISED OCTOBER 2005
14 POST OFFICE BOX 655303 DALLAS, TEXAS 75265
APPLICATION INFORMATION
retriggering data
The minimum input retriggering time (tMIR) is the minimum time required after the initial signal before retriggering
the input. After tMIR, the device retriggers the output. Experimentally, it also can be shown that to retrigger the
output pulse, the two adjacent input signals should be tMIR apart, where tMIR = 0.30 × tw. The retrigger pulse
duration is calculated as shown in Figure 11.
tMIR
tRT
tPLH
tw
Input
Output
tRT = tw + tPLH = (K × RT × CT) + tPLH
Where:
tMIR = Minimum Input Retriggering Time
tPLH = Propagation Delay
tRT = Retrigger Time
tw= Output Pulse Duration Before Retriggering
Figure 11. Retrigger Pulse Duration
The minimum value from the end of the input pulse to the beginning of the retriggered output should be
approximately 15 ns to ensure a retriggered output (see Figure 12).
Input
Output
tMRT = Minimum Time Between the End of the Second Input Pulse and the Beginning of the Retriggered Output
tMRT = 15 ns
tMRT
Figure 12. Input/Output Requirements
PACKAGING INFORMATION
Orderable Device Status (1) Package
Type Package
Drawing Pins Package
Qty Eco Plan (2) Lead/Ball Finish MSL Peak Temp (3)
SN74LV123AD ACTIVE SOIC D 16 40 Green (RoHS &
no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SN74LV123ADBR ACTIVE SSOP DB 16 2000 Green (RoHS &
no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SN74LV123ADBRE4 ACTIVE SSOP DB 16 2000 Green (RoHS &
no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SN74LV123ADBRG4 ACTIVE SSOP DB 16 2000 Green (RoHS &
no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SN74LV123ADE4 ACTIVE SOIC D 16 40 Green (RoHS &
no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SN74LV123ADG4 ACTIVE SOIC D 16 40 Green (RoHS &
no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SN74LV123ADGVR ACTIVE TVSOP DGV 16 2000 Green (RoHS &
no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SN74LV123ADGVRE4 ACTIVE TVSOP DGV 16 2000 Green (RoHS &
no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SN74LV123ADGVRG4 ACTIVE TVSOP DGV 16 2000 Green (RoHS &
no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SN74LV123ADR ACTIVE SOIC D 16 2500 Green (RoHS &
no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SN74LV123ADRE4 ACTIVE SOIC D 16 2500 Green (RoHS &
no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SN74LV123ADRG4 ACTIVE SOIC D 16 2500 Green (RoHS &
no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SN74LV123ANSR ACTIVE SO NS 16 2000 Green (RoHS &
no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SN74LV123ANSRE4 ACTIVE SO NS 16 2000 Green (RoHS &
no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SN74LV123ANSRG4 ACTIVE SO NS 16 2000 Green (RoHS &
no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SN74LV123APW ACTIVE TSSOP PW 16 90 Green (RoHS &
no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SN74LV123APWE4 ACTIVE TSSOP PW 16 90 Green (RoHS &
no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SN74LV123APWG4 ACTIVE TSSOP PW 16 90 Green (RoHS &
no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SN74LV123APWR ACTIVE TSSOP PW 16 2000 Green (RoHS &
no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SN74LV123APWRE4 ACTIVE TSSOP PW 16 2000 Green (RoHS &
no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SN74LV123APWRG4 ACTIVE TSSOP PW 16 2000 Green (RoHS &
no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SN74LV123APWT ACTIVE TSSOP PW 16 250 Green (RoHS &
no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SN74LV123APWTE4 ACTIVE TSSOP PW 16 250 Green (RoHS &
no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SN74LV123APWTG4 ACTIVE TSSOP PW 16 250 Green (RoHS &
no Sb/Br) CU NIPDAU Level-1-260C-UNLIM
SN74LV123ARGYR ACTIVE VQFN RGY 16 3000 Green (RoHS &
no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR
PACKAGE OPTION ADDENDUM
www.ti.com 22-Dec-2009
Addendum-Page 1
Orderable Device Status (1) Package
Type Package
Drawing Pins Package
Qty Eco Plan (2) Lead/Ball Finish MSL Peak Temp (3)
SN74LV123ARGYRG4 ACTIVE VQFN RGY 16 3000 Green (RoHS &
no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR
(1) The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in
a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check
http://www.ti.com/productcontent for the latest availability information and additional product content details.
TBD: The Pb-Free/Green conversion plan has not been defined.
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements
for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered
at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and
package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS
compatible) as defined above.
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame
retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material)
(3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder
temperature.
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is
provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the
accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take
reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on
incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited
information may not be available for release.
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI
to Customer on an annual basis.
OTHER QUALIFIED VERSIONS OF SN74LV123A :
Automotive: SN74LV123A-Q1
Enhanced Product: SN74LV123A-EP
NOTE: Qualified Version Definitions:
Automotive - Q100 devices qualified for high-reliability automotive applications targeting zero defects
Enhanced Product - Supports Defense, Aerospace and Medical Applications
PACKAGE OPTION ADDENDUM
www.ti.com 22-Dec-2009
Addendum-Page 2
TAPE AND REEL INFORMATION
*All dimensions are nominal
Device Package
Type Package
Drawing Pins SPQ Reel
Diameter
(mm)
Reel
Width
W1 (mm)
A0
(mm) B0
(mm) K0
(mm) P1
(mm) W
(mm) Pin1
Quadrant
SN74LV123ADBR SSOP DB 16 2000 330.0 16.4 8.2 6.6 2.5 12.0 16.0 Q1
SN74LV123ADGVR TVSOP DGV 16 2000 330.0 12.4 6.8 4.0 1.6 8.0 12.0 Q1
SN74LV123ANSR SO NS 16 2000 330.0 16.4 8.2 10.5 2.5 12.0 16.0 Q1
SN74LV123APWR TSSOP PW 16 2000 330.0 12.4 7.0 5.6 1.6 8.0 12.0 Q1
SN74LV123APWR TSSOP PW 16 2000 330.0 12.4 6.9 5.6 1.6 8.0 12.0 Q1
SN74LV123APWRG4 TSSOP PW 16 2000 330.0 12.4 6.9 5.6 1.6 8.0 12.0 Q1
SN74LV123APWT TSSOP PW 16 250 330.0 12.4 6.9 5.6 1.6 8.0 12.0 Q1
SN74LV123ARGYR VQFN RGY 16 3000 330.0 12.4 3.8 4.3 1.5 8.0 12.0 Q1
PACKAGE MATERIALS INFORMATION
www.ti.com 14-Jul-2012
Pack Materials-Page 1
*All dimensions are nominal
Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm)
SN74LV123ADBR SSOP DB 16 2000 367.0 367.0 38.0
SN74LV123ADGVR TVSOP DGV 16 2000 367.0 367.0 35.0
SN74LV123ANSR SO NS 16 2000 367.0 367.0 38.0
SN74LV123APWR TSSOP PW 16 2000 364.0 364.0 27.0
SN74LV123APWR TSSOP PW 16 2000 367.0 367.0 35.0
SN74LV123APWRG4 TSSOP PW 16 2000 367.0 367.0 35.0
SN74LV123APWT TSSOP PW 16 250 367.0 367.0 35.0
SN74LV123ARGYR VQFN RGY 16 3000 367.0 367.0 35.0
PACKAGE MATERIALS INFORMATION
www.ti.com 14-Jul-2012
Pack Materials-Page 2
MECHANICAL DATA
MSSO002E – JANUARY 1995 – REVISED DECEMBER 2001
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
DB (R-PDSO-G**) PLASTIC SMALL-OUTLINE
4040065 /E 12/01
28 PINS SHOWN
Gage Plane
8,20
7,40
0,55
0,95
0,25
38
12,90
12,30
28
10,50
24
8,50
Seating Plane
9,907,90
30
10,50
9,90
0,38
5,60
5,00
15
0,22
14
A
28
1
2016
6,50
6,50
14
0,05 MIN
5,905,90
DIM
A MAX
A MIN
PINS **
2,00 MAX
6,90
7,50
0,65 M
0,15
0°ā8°
0,10
0,09
0,25
NOTES: A. All linear dimensions are in millimeters.
B. This drawing is subject to change without notice.
C. Body dimensions do not include mold flash or protrusion not to exceed 0,15.
D. Falls within JEDEC MO-150
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