Datasheet

1998 Jul 08 6
Philips Semiconductors Product specification
Hex D-type flip-flop with reset; positive-edge trigger 74HC/HCT174
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
D
n
0.25
CP 1.30
MR 1.25
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
n
21 35 44 53 ns 4.5 Fig.6
t
PHL
propagation delay
MR to Q
n
20 35 44 53 ns 4.5 Fig.7
t
THL
/ t
TLH
output transition time 7 15 19 22 ns 4.5 Fig.6
t
W
clock pulse width
HIGH or LOW
16 7 20 24 ns 4.5 Fig.6
t
W
master reset pulse
width; LOW
20 7 25 30 ns 4.5 Fig.7
t
rem
removal time MR to CP 12 −3 15 18 ns 4.5 Fig.7
t
su
set-up time D
n
to CP 16 4 20 24 ns 4.5 Fig.8
t
h
hold time D
n
to CP 5 −3 5 5 ns 4.5 Fig.8
f
max
maximum clock pulse
frequency
30 63 24 20 MHz 4.5 Fig.6