Datasheet

December 1990 5
Philips Semiconductors Product specification
Dual 4-bit synchronous binary counter 74HC/HCT4520
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
nCP
0
to nQ
n
77
28
22
240
48
41
300
60
51
360
72
61
ns 2.0
4.5
6.0
Fig.8
t
PHL
/ t
PLH
propagation delay
nCP
1
to nQ
n
77
28
22
240
48
41
300
60
51
360
72
61
ns 2.0
4.5
6.0
Fig.8
t
PHL
propagation delay
nMR to nQ
n
44
16
13
150
30
26
190
38
33
225
45
38
ns 2.0
4.5
6.0
Fig.9
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
Fig.8
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.7
t
W
master reset pulse width
HIGH
120
24
20
39
14
11
150
30
26
180
36
31
ns 2.0
4.5
6.0
Fig.7
t
rem
removal time
nMR to nCP
0
; nCP
1
0
0
0
−28
−10
−8
0
0
0
0
0
0
ns 2.0
4.5
6.0
Fig.7
t
su
set-up time
nCP
1
to nCP
0
;
nCP
0
to nCP
1
80
16
14
14
5
4
100
20
17
120
24
20
ns 2.0
4.5
6.0
Fig.8
f
max
maximum clock pulse
frequency
6.0
30
35
19
58
69
4.8
24
28
4.0
20
24
MHz 2.0
4.5
6.0
Fig.7