Datasheet

December 1990 6
Philips Semiconductors Product specification
12-stage binary ripple counter 74HC/HCT4040
DC CHARACTERISTICS FOR 74HCT
For the DC characteristics see “74HC/HCT/HCU/HCMOS Logic Family Specifications” .
Output capability: standard
I
CC
category: MSI
Note to HCT types
The value of additional quiescent supply current (∆I
CC
) for a unit load of 1 is given in the family specifications.
To determine ∆I
CC
per input, multiply this value by the unit load coefficient shown in the table below.
AC CHARACTERISTICS FOR 74HCT
GND = 0 V; t
r
=t
f
= 6 ns; C
L
= 50 pF
INPUT UNIT LOAD COEFFICIENT
CP
MR
0.85
1.10
SYMBOL PARAMETER
T
amb
(°C)
UNIT
TEST CONDITIONS
74HCT
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
0
19 40 50 60 ns 4.5 Fig.7
t
PHL
/ t
PLH
propagation delay
Q
n
to Q
n+1
10 20 25 30 ns 4.5 Fig.7
t
PHL
propagation delay
MR to Q
n
23 45 56 68 ns 4.5 Fig.7
t
THL
/ t
TLH
output transition time 7 15 19 22 ns 4.5 Fig.7
t
W
clock pulse width
HIGH or LOW
16 7 20 24 ns 4.5 Fig.7
t
W
master reset pulse
width; HIGH
16 6 20 24 ns 4.5 Fig.7
t
rem
removal time
MR to CP
10 2 13 15 ns 4.5 Fig.7
f
max
maximum clock pulse
frequency
30 72 24 20 MHz 4.5 Fig.7