74HC161 Philips, 74HC161 Datasheet - Page 9

• Manufacturer Part Number: 74HC161
• Description: Presettable synchronous 4-bit binary counter asynchronous reset
• Manufacturer: Philips

Philips Semiconductors
DC CHARACTERISTICS FOR 74HCT
For the DC characteristics see
Output capability: standard
I
Note to HCT types
The value of additional quiescent supply current ( I
To determine I
AC CHARACTERISTICS FOR 74HCT
GND = 0 V; t
December 1990
CC
INPUT
MR
CP
CEP
D
CET
PE
SYMBOL PARAMETER
t
t
t
t
t
t
t
t
t
PHL
PHL
PHL
PHL
PHL
THL
W
W
rem
Presettable synchronous 4-bit binary
counter; asynchronous reset
n
category: MSI
/ t
/ t
/ t
/ t
TLH
PLH
PLH
PLH
UNIT LOAD COEFFICIENT
0.95
1.10
0.25
0.25
0.75
0.30
propagation delay
propagation delay
propagation delay
propagation delay
propagation delay
output transition time
clock pulse width
master reset pulse
removal time
r
= t
CP to Q
CP to TC
MR to Q
MR to TC
CET to TC
HIGH or LOW
width; LOW
MR to CP
CC
f
= 6 ns; C
per input, multiply this value by the unit load coefficient shown in the table below.
n
n
L
= 50 pF
“74HC/HCT/HCU/HCMOS Logic Family Specifications”
16
20
20
min.
23
28
29
30
17
7
7
10
6
typ.
25
43
48
46
51
35
15
max. min.
CC
) for a unit load of 1 is given in the family specifications.
T
20
25
25
74HCT
amb
9
40 to 85
( C)
54
60
58
64
44
19
max.
24
30
30
min.
40 to 125
65
72
69
77
53
22
max.
.
ns
ns
ns
ns
ns
ns
ns
ns
ns
UNIT
74HC/HCT161
4.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
V
(V)
TEST CONDITIONS
CC
Product specification
Fig.8
Fig.10
Fig.8
Fig.9
Fig.9
Figs 8 and 10
Fig.8
Fig.9
Fig.9
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