December 1990 6
Philips Semiconductors Product specification
4-bit binary ripple counter 74HC/HCT93
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
0
, CP
1
MR
n
0.60
0.40
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
0
to Q
0
18 34 43 51 ns 4.5 Fig.6
t
PHL
/ t
PLH
propagation delay
CP
1
to Q
1
18 34 43 51 ns 4.5 Fig.6
t
PHL
/ t
PLH
propagation delay
CP
1
to Q
2
24 46 58 69 ns 4.5 Fig.6
t
PHL
/ t
PLH
propagation delay
CP
1
to Q
3
30 58 73 87 ns 4.5 Fig.6
t
PHL
propagation delay
MR
n
to Q
n
17 33 41 50 ns 4.5 Fig.7
t
THL
/ t
TLH
output transition time 7 15 19 22 ns 4.5 Fig.6
t
rem
removal time
MR
n
to CP
0
, CP
1
10 3 13 15 ns 4.5 Fig.7
t
W
pulse width
CP
0
, CP
1
16 7 20 24 ns 4.5 Fig.6
t
W
master reset pulse width
MR
n
16 5 20 24 ns 4.5 Fig.7
f
max
maximum clock pulse
frequency
CP
0
, CP
1
30 70 24 20 MHz 4.5 Fig.6
