Datasheet

December 1990 10
Philips Semiconductors Product specification
Presettable synchronous 4-bit binary
counter; asynchronous reset
74HC/HCT161
t
su
set-up time
D
n
to CP
18 8 23 27 ns 4.5 Fig.11
t
su
set-up time
PE to CP
30 17 38 45 ns 4.5 Fig.11
t
su
set-up time
CEP, CET to CP
40 17 50 60 ns 4.5 Fig.12
t
h
hold time
D
n
, PE, CEP,
CET to CP
0 −7 0 0 ns 4.5 Figs 11 and 12
f
max
maximum clock pulse
frequency
23 41 18 15 MHz 4.5 Fig.8
SYMBOL PARAMETER
T
amb
(°C)
UNIT
TEST CONDITIONS
74HCT
V
CC
(V)
WAVEFORMS
+25 −40 to +85 −40 to +125
min. typ. max. min. max. min. max.