CD54AC161 Datasheet, PDF (8/15 Pages) Texas Instruments – 4-BIT SYNCHRONOUS BINARY COUNTERS

CD54AC161, CD74AC161
4-BIT SYNCHRONOUS BINARY COUNTERS
SCHS239C – SEPTEMBER 1998 – REVISED MARCH 2003
timing requirements over recommended operating free-air temperature range (unless otherwise
noted)
fclock Clock frequency
tw
Pulse duration
tsu
Setup time, before CLK↑
th
Hold time, after CLK↑
trec Recovery time, CLR↑ before CLK↑
CLK high or low
CLR low
A, B, C, or D
LOAD
A, B, C, or D
ENP or ENT
VCC
1.5 V
3.3 V ± 0.3 V
5 V ± 0.5 V
1.5 V
3.3 V ± 0.3 V
5 V ± 0.5 V
1.5 V
3.3 V ± 0.3 V
5 V ± 0.5 V
1.5 V
3.3 V ± 0.3 V
5 V ± 0.5 V
1.5 V
3.3 V ± 0.3 V
5 V ± 0.5 V
1.5 V
3.3 V ± 0.3 V
5 V ± 0.5 V
1.5 V
3.3 V ± 0.3 V
5 V ± 0.5 V
1.5 V
3.3 V ± 0.3 V
5 V ± 0.5 V
–55°C to
125°C
MIN MAX
7
64
90
69
7.7
5.5
63
7
5
63
7
5
75
8.4
6
0
0
0
0
0
0
75
8.4
6
–40°C to
85°C
MIN MAX
8
73
103
61
6.8
4.8
55
6.1
4.4
55
6.1
4.4
66
7.4
5.3
0
0
0
0
0
0
66
7.4
5.3
UNIT
MHz
ns
ns
ns
ns
8
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