DATA SH EET
Product specification
File under Integrated Circuits, IC06 December 1990
INTEGRATED CIRCUITS
74HC/HCT368
Hex buffer/line driver; 3-state;
inverting
For a complete data sheet, please also download:
•The IC06 74HC/HCT/HCU/HCMOS Logic Family Specifications
•The IC06 74HC/HCT/HCU/HCMOS Logic Package Information
•The IC06 74HC/HCT/HCU/HCMOS Logic Package Outlines
December 1990 2
Philips Semiconductors Product specification
Hex buffer/line driver; 3-state; inverting 74HC/HCT368
FEATURES
•Inverting outputs
•Output capability: bus driver
•ICC category: MSI
GENERAL DESCRIPTION
The 74HC/HCT368 are high-speed Si-gate CMOS devices
and are pin compatible with low power Schottky TTL
(LSTTL). They are specified in compliance with JEDEC
standard no. 7A.
The 74HC/HCT368 are hex inverting buffer/line drivers
with 3-state outputs. The 3-state outputs (nY) are
controlled by the output enable inputs (1OE, 2OE).
A HIGH on nOE causes the outputs to assume a high
impedance OFF-state.
The “368” is identical to the “367” but has inverting outputs.
QUICK REFERENCE DATA
GND = 0 V; Tamb =25°C; tr=t
f= 6 ns
Notes
1. CPD is used to determine the dynamic power dissipation (PD in µW):
PD=C
PD ×VCC2×fi+∑ (CL×VCC2×fo) where:
fi= input frequency in MHz
fo= output frequency in MHz
∑(CL×VCC2×fo) = sum of outputs
CL= output load capacitance in pF
VCC = supply voltage in V
2. For HC the condition is VI= GND to VCC
For HCT the condition is VI= GND to VCC −1.5 V
ORDERING INFORMATION
See
“74HC/HCT/HCU/HCMOS Logic Package Information”
.
SYMBOL PARAMETER CONDITIONS TYPICAL UNIT
HC HCT
tPHL/ tPLH propagation delay nA to nYC
L
= 15 pF; VCC =5V 9 11 ns
C
Iinput capacitance 3.5 3.5 pF
CPD power dissipation capacitance per buffer notes 1 and 2 30 30 pF
December 1990 3
Philips Semiconductors Product specification
Hex buffer/line driver; 3-state; inverting 74HC/HCT368
PIN DESCRIPTION
PIN NO. SYMBOL NAME AND FUNCTION
1, 15 1OE, 2OE output enable inputs (active LOW)
2, 4, 6, 10, 12, 14 1A to 6A data inputs
3, 5, 7, 9, 11, 13 1Y to 6Y data outputs
8 GND ground (0 V)
16 VCC positive supply voltage
Fig.1 Pin configuration. Fig.2 Logic symbol. Fig.3 IEC logic symbol.
December 1990 4
Philips Semiconductors Product specification
Hex buffer/line driver; 3-state; inverting 74HC/HCT368
Fig.4 Functional diagram.
FUNCTION TABLE
Note
1. H = HIGH voltage level
L = LOW voltage level
X = don’t care
Z = high impedance OFF-state
INPUTS OUTPUTS
nOE nA nY
L
L
H
L
H
X
H
L
Z
Fig.5 Logic diagram.
December 1990 5
Philips Semiconductors Product specification
Hex buffer/line driver; 3-state; inverting 74HC/HCT368
DC CHARACTERISTICS FOR 74HC
For the DC characteristics see
“74HC/HCT/HCU/HCMOS Logic Family Specifications”
.
Output capability: bus driver
ICC category: MSI
AC CHARACTERISTICS FOR 74HC
GND = 0 V; tr=t
f= 6 ns; CL=50pF
SYMBOL PARAMETER
Tamb (°C)
UNIT
TEST CONDITIONS
74HC VCC
(V) WAVEFORMS
+25 −40 to +85 −40 to +125
min. typ. max. min. max. min. max.
tPHL/ tPLH propagation delay
nA to nY 30
11
9
95
19
16
120
24
20
145
29
25
ns 2.0
4.5
6.0
Fig.6
tPZH/ tPZL 3-state output enable time
nOE to nY 41
15
12
150
30
26
190
38
33
225
45
38
ns 2.0
4.5
6.0
Fig.7
tPHZ/ tPLZ 3-state output disable time
nOE to nY 55
20
16
150
30
26
190
38
33
225
45
38
ns 2.0
4.5
6.0
Fig.7
tTHL/ tTLH output transition time 14
5
4
60
12
10
75
15
13
90
18
15
ns 2.0
4.5
6.0
Fig.6
December 1990 6
Philips Semiconductors Product specification
Hex buffer/line driver; 3-state; inverting 74HC/HCT368
DC CHARACTERISTICS FOR 74HCT
For the DC characteristics see
“74HC/HCT/HCU/HCMOS Logic Family Specifications”
.
Output capability: bus driver
ICC category: MSI
Note to HCT types
The value of additional quiescent supply current (∆ICC) for a unit load of 1 is given in the family specifications.
To determine ∆ICC per input, multiply this value by the unit load coefficient shown in the table below.
AC CHARACTERISTICS FOR 74HCT
GND = 0 V; tr=t
f= 6 ns; CL=50pF
INPUT UNIT LOAD COEFFICIENT
1OE
2OE
nA
1.00
0.90
1.00
SYMBOL PARAMETER
Tamb (°C)
UNIT
TEST CONDITIONS
74HCT VCC
(V) WAVEFORMS
+25 −40 to +85 −40 to +125
min. typ. max. min. max. min. max.
tPHL/ tPLH propagation delay
nA to nY 13 24 30 36 ns 4.5 Fig.6
tPZH/ tPZL 3-state output enable time
nOE to nY 17 35 44 53 ns 4.5 Fig.7
tPHZ/ tPLZ 3-state output disable time
nOE to nY 20 35 44 53 ns 4.5 Fig.7
tTHL/ tTLH output transition time 5 12 15 18 ns 4.5 Fig.6
December 1990 7
Philips Semiconductors Product specification
Hex buffer/line driver; 3-state; inverting 74HC/HCT368
AC WAVEFORMS
PACKAGE OUTLINES
See
“74HC/HCT/HCU/HCMOS Logic Package Outlines”
.
Fig.6 Waveforms showing the input (nA) to output (nY) propagation delays and the output transition times.
(1) HC : VM= 50%; VI= GND to VCC.
HCT : VM= 1.3 V; VI= GND to 3 V.
Fig.7 Waveforms showing the 3-state enable and disable times.
(1) HC : VM= 50%; VI= GND to VCC.
HCT : VM= 1.3 V; VI= GND to 3 V.
