Datasheet

December 1990 7
Philips Semiconductors Product specification
Presettable synchronous 4-bit binary
counter; asynchronous reset
74HC/HCT161
DC CHARACTERISTICS FOR 74HC
For the DC characteristics see “74HC/HCT/HCU/HCMOS Logic Family Specifications” .
Output capability: standard
I
CC
category: MSI
AC CHARACTERISTICS FOR 74HC
GND = 0 V; t
r
=t
f
= 6 ns; C
L
= 50 pF
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.
t
PHL
/ t
PLH
propagation delay
CP to Q
n
61
22
18
190
38
32
240
48
41
285
57
48
ns 2.0
4.5
6.0
Fig.8
t
PHL
/ t
PLH
propagation delay
CP to TC
69
25
20
215
43
37
270
54
46
325
65
55
ns 2.0
4.5
6.0
Fig.8
t
PHL
propagation delay
MR to Q
n
63
23
18
210
42
36
265
53
45
315
63
54
ns 2.0
4.5
6.0
Fig.9
t
PHL
propagation delay
MR to TC
63
23
18
220
44
37
275
55
47
330
66
56
ns 2.0
4.5
6.0
Fig.9
t
PHL
/ t
PLH
propagation delay
CET to TC
33
12
10
150
30
26
190
38
33
225
45
38
ns 2.0
4.5
6.0
Fig.10
t
THL
/ t
TLH
output transition time 19
7
6
75
15
13
95
19
16
110
22
19
ns 2.0
4.5
6.0
Figs 8 and 10
t
W
clock pulse width
HIGH or LOW
80
16
14
22
8
6
100
20
17
120
24
20
ns 2.0
4.5
6.0
Fig.8
t
W
master reset pulse
width; LOW
80
16
14
19
7
6
100
20
17
120
24
20
ns 2.0
4.5
6.0
Fig.9
t
rem
removal time
MR to CP
100
20
17
19
7
6
125
25
21
150
30
26
ns 2.0
4.5
6.0
Fig.9
t
su
set-up time
D
n
to CP
80
16
14
25
9
7
100
20
17
120
24
20
ns 2.0
4.5
6.0
Fig.11
t
su
set-up time
PE to CP
100
20
17
30
11
9
125
25
21
150
30
26
ns 2.0
4.5
6.0
Fig.11