Philips Semiconductors
Product specification
Octal D-type transparent latch; 3-state
74HC/HCT573
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.
INPUT
UNIT LOAD COEFFICIENT
Dn
LE
OE
0.35
0.65
1.25
AC CHARACTERISTICS FOR 74HCT
GND = 0 V; tr = tf = 6 ns; CL = 50 pF
Tamb (°C)
TEST CONDITIONS
74HCT
SYMBOL PARAMETER
UNIT
VCC
+25
−40 to +85 −40 to +125
WAVEFORMS
(V)
min. typ. max. min. max. min. max.
tPHL/ tPLH propagation delay
Dn to Qn
20
18
17
35
35
30
44
44
38
53
53
45
ns
ns
ns
4.5 Fig.6
4.5 Fig.7
4.5 Fig.8
tPHL/ tPLH propagation delay
LE to Qn
t
PZH/ tPZL 3-state output enable
time
OE to Qn
tPHZ/ tPLZ 3-state output disable
18
30
12
38
15
45
18
ns
4.5 Fig.8
time
OE to Qn
t
THL/ tTLH output transition time
5
5
7
4
ns
ns
ns
ns
4.5 Fig.6
4.5 Fig.7
4.5 Fig.9
4.5 Fig.9
tW
tsu
th
enable pulse width
HIGH
16
13
9
20
16
11
24
20
14
set-up time
Dn to LE
hold time
Dn to LE
December 1990
6
NXP [ NXP ]
