Datasheet

December 1990 8
Philips Semiconductors Product specification
Presettable synchronous 4-bit binary
counter; asynchronous reset
74HC/HCT161
t
su
set-up time
CEP, CET to CP
170
34
29
47
17
14
215
43
37
255
51
43
ns 2.0
4.5
6.0
Fig.12
t
h
hold time
D
n
, PE, CEP,
CET to CP
0
0
0
−14
−5
−4
0
0
0
0
0
0
ns 2.0
4.5
6.0
Figs 11 and 12
f
max
maximum clock pulse
frequency
4.6
23
27
13
40
48
3.6
18
21
3.0
15
18
MHz 2.0
4.5
6.0
Fig.8
SYMBOL PARAMETER
T
amb
(°C)
UNIT
TEST CONDITIONS
74HC
V
CC
(V)
WAVEFORMS+25 −40 to +85 −40 to +125
min. typ. max. min. max. min. max.