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