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