Datasheet

1998 Jul 08 6
Philips Semiconductors Product specification
Quad D-type flip-flop with reset; positive-edge trigger 74HC/HCT175
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
MR 1.00
CP 0.60
D
n
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 to Q
n
, Q
n
19 33 41 50 ns 4.5 Fig.6
t
PHL
propagation delay
MR to Q
n
22 38 48 57 ns 4.5 Fig.8
t
PLH
propagation delay
MR to Q
n
19 35 44 53 ns 4.5 Fig.8
t
THL
/ t
TLH
output transition time 7 15 19 22 ns 4.5 Fig.6
t
W
clock pulse width
HIGH or LOW
20 12 25 30 ns 4.5 Fig.6
t
W
master reset pulse width
LOW
20 11 25 30 ns 4.5 Fig.8
t
rem
removal time
MR to CP
5 −10 5 5 ns 4.5 Fig.8
t
su
set-up time
D
n
to CP
16 5 20 24 ns 4.5 Fig.7
t
h
hold time
CP to D
n
5 0 5 5 ns 4.5 Fig.7
f
max
maximum clock pulse
frequency
25 49 20 17 MHz 4.5 Fig.6