TL7700 A Series
August1996
SUPPLY VOLTAGE SUPERVISORS
.POWER-ONRESETGENERATOR
.AUTOMATIC RESET GENERATION AFTER
VOLTAGEDROP
.WIDE SUPPLY VOLTAGE RANGE ... 3V TO
18V
.PRECISIONVOLTAGESENSOR
.TEMPERATURE-COMPENSATED VOLTAGE
REFERENCE
.TRUE AND COMPLEMENT RESETOUTPUTS
.EXTERNALLYADJUSTABLEPULSE WIDTH N
Minidip
DESCRIPTION
TheTL7700Aseriesaremonolithicintegratedcircuit
supplyvoltagesupervisorsspecificallydesi-gnedfor
use as reset controllers in microcomputer and mi-
croprocessorsystems.During power-upthedevice
teststhesupplyvoltageand keepstheRESETand
RESET outputs active (high and low, respectively)
as long as the supply voltage has not reached its
nominal voltage value. Taking RESIN low has the
sameeffect.Toensurethatthemicrocomputersys-
temhasreset,theTL7700Atheninitiatesaninternal
timedelaythatdelaysthereturnoftheresetoutputs
totheirinactivestates.Sincethetimedelayformost
microcomputersandmicroprocessorsisintheorder
of several machinecycles, the device internaltime
delayis determinedby anexternaltimedelayisde-
terminedby an externalcapacitorconnectedto the
CTinput(pin3).
td=1.3 x 104xC
T
Where: CTis in farads(F) and tdinseconds (s). In
addition,when the supply voltage drops below the
nominal value, the outputs will be active until the
supplyvoltagereturns tothe nominalvalue.An ex-
ternalcapacitor(typically0.1µF)mustbeconnected
to theREF output(pin 1) toreducetheinfluenceof
fasttransientsin the supply voltage.
The TL7700AIseries ischaracterized foroperation
from–25oCto85
o
C ;theTL7700ACseriesis char-
acterizedfrom 0oCto70
o
C.
D
SO8
ORDERING NUMBERS
Temperature Range Minidip S08
0to70
o
C TL77XXACP TL77XXACD
-25 to 85oC TL77XXAIP TL77XXAID
PIN CONNECTION (top view)
1/7
*TL7702A R1 =0Ω, R2 = open ; TL7705A R1 = 7.8KΩ, R2 = 10kΩ;TL7709AR1 = 19.7KΩ, R2 = 10kΩ;
TL7712A R1 = 32.7kΩ, R2= 10kΩ; TL7715A R1 = 43.4KΩ, R2= 10kΩ.
BLOCK DIAGRAM
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
VSSupply Voltage, VCC - (see note 1) 20 V
ViInput Voltage Range at RESIN -0.3 to 20 V
ViInput Voltage at SENSE : TL7702A (see note 2)
TL7705A
TL7709A
TL7712A
TL7715A
-0.3 to 6
-0.3 to 10
-0.3 to 15
-0.3 to 20
-0.3 to 20
V
IOH High-level Output Current at RESET -30 mA
IOL Low-level Output Current at RESET 30 mA
Tamb Operating Free-air Temperature Range :TL77XXAI
TL77XXAC -25 to 85
0to70
o
C
T
stg Storage Temperature Range -65 to 150 oC
Notes: 1. All voltage values are with respect to thenetwork ground terminal
2. For the TL7700A, the voltage applied to theSENSE terminal must never exceed Vs.
THERMAL DATA
Symbol Parameter Value Unit
Rth j-amb Thermal Resistance Junction-ambient Max. 120 oC/W
RECOMMENDED OPERATING CONDITIONS
Symbol Parameter Min. Max. Unit
VSSupply Voltage 3.6 18 V
VIH High-level Input Voltage at RESIN 2 V
VIL Low-level Input Voltage at RESIN 0.6 V
ViVoltage at Sense Input TL7702A
TL7705A
TL7709A
TL7712A
TL7715A
0
0
0
0
0
See note 3
10
15
20
20
V
IOH High-level Output Current at RESET -16 mA
IOL Low-level Output Current at RESET 16 mA
Tamb Operating Free-air Temperature Range TL77-AI
TL77-AC -25
085
70 oC
Note : 3. For proper operation of theTL7702A, the voltage applied to the SENSEterminal shouldnot exceed Vs- 1V or 6V, which everis less.
TL7700A Series
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ELECTRICAL CHARACTERISTICS these specifications unless otherwise specified, apply for :
Tamb = –25 to 85oC (TLXXAI), Tamb = 0 to 70oC (TL77XXAC)
Symbol Parameter Test Conditions (1) Min. Typ. Max. Unit
VOH High-level Output Voltage at RESET IOH = –16mA Vs-
1.5 V
VOL Low-Level Output Voltage at RESET IOL = 16mA 0.4 V
Vref Reference Voltage Tamb =25
o
C 2.48 2.53 2.58 V
VTThreshold Voltage at SENSE Input TL7702A
TL7705A
TL7709A
TL7712A
TL7715A
Vs= 3.6V to 18V
Tamb =25
o
C2.48
4.5
7.5
10.6
13.2
2.53
4.55
7.6
10.8
13.5
2.58
4.6
7.7
11
13.8
V
VTThreshold Voltage at SENSE Inpu TL7702A
TL7705A
TL7709A
TL7712A
TL7715At
Vs= 3.6V to 18V 2.45
4.45
7.4
10.4
13
2.53
4.55
7.6
10.8
13.5
2.58
4.6
7.7
11
13.8
V
VT+,V
T– Hysteresis (2) at SENSE Input TL7702A
TL7705A
TL7709A
TL7712A
TL7715A
Vs= 3.6V to 18V
Tamb =25
o
C10
15
20
35
45
mV
IIInput Current at RESIN Input Vi= 2.4V to VS
Vi= 0.4V 20
-100 µA
IIInput Current at SENSE Input TL7702A Vref <V
i<V
s- 1.5V 0.5 2 µA
IOH High-level Output Current at RESET VO= 18V 50 µA
IOL Low-level Output Current at RESET VO=0V -50 µ
A
I
SSupply Current All Inputs and out.
open 1.8 3.3 mA
Notes: 1. All characteristics are measured withC = 0.1µF from Pin1 to GND,and withC = 0.1µF fromPin 3 to GND.
2. Hysteresis isthe difference betweenthepositive going input threshold voltage. VT+, and the negative going input threshold
voltage, VT-.
SWITCHING CHARACTERISTICS
Symbol Parameter Test Conditions Min. Typ. Max. Unit
tpi Pulse Width at SENSE Input Vih =V
ityp +0.04 x Vi
ViL =V
ityp –0.04 x Vi0.9 µs
tpi Pulse Width at RESIN Input 0.4 µs
tpo Pulse Width at Output CT= 0.1µF 0.65 1.3 2.6 ms
tpdHL Propagation Delay Time from RESIN
to RESET CL= 100pF, Vs= 5V, RL= 4.7kΩ1µs
tr/f Rise/Falltime at RESET and RESET CL= 10pF, Vs= 5V, RL= 4.7kΩ1µs
TL7700A Series
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Figure1 : MultiplePowerSupplySystemResetGeneration
Figure2 : ResetController forµP
TL7700A Series
4/7
SO8 PACKAGE MECHANICAL DATA
DIM. mm inch
MIN. TYP. MAX. MIN. TYP. MAX.
A 1.75 0.069
a1 0.1 0.25 0.004 0.010
a2 1.65 0.065
a3 0.65 0.85 0.026 0.033
b 0.35 0.48 0.014 0.019
b1 0.19 0.25 0.007 0.010
C 0.25 0.5 0.010 0.020
c1 45°(typ.)
D 4.8 5.0 0.189 0.197
E 5.8 6.2 0.228 0.244
e 1.27 0.050
e3 3.81 0.150
F 3.8 4.0 0.15 0.157
L 0.4 1.27 0.016 0.050
M 0.6 0.024
S8
°
(max.)
TL7700A Series
5/7
MINIDIP PACKAGE MECHANICAL DATA
DIM. mm inch
MIN. TYP. MAX. MIN. TYP. MAX.
A 3.32 0.131
a1 0.51 0.020
B 1.15 1.65 0.045 0.065
b 0.356 0.55 0.014 0.022
b1 0.204 0.304 0.008 0.012
D 10.92 0.430
E 7.95 9.75 0.313 0.384
e 2.54 0.100
e3 7.62 0.300
e4 7.62 0.300
F 6.6 0.260
I 5.08 0.200
L 3.18 3.81 0.125 0.150
Z 1.52 0.060
TL7700A Series
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Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsibility for
the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its
use. No license is granted by implication or otherwise under any patentor patent rights of SGS-THOMSON Microelectronics. Specification
mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously
supplied. SGS-THOMSON Microelectronics products are not authorized for use as critical components in life support devices or systems
without express written approval of SGS-THOMSON Microelectronics.
1996 SGS-THOMSON Microelectronics – Printed in Italy – All Rights Reserved
SGS-THOMSON Microelectronics GROUP OF COMPANIES
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TL7700A Series
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