Philips Semiconductors
Product specification
Dual JK flip-flop with reset; negative-edge trigger
FEATURES
•
Output capability: standard
•
I
CC
category: flip-flops
GENERAL DESCRIPTION
The 74HC/HCT107 are high-speed Si-gate CMOS devices
and are pin compatible with low power Schottky TTL
(LSTTL). They are specified in compliance with JEDEC
standard no. 7A.
74HC/HCT107
The 74HC/HCT107 are dual negative-edge triggered
JK-type flip-flops featuring individual J, K, clock (nCP) and
reset (nR) inputs; also complementary Q and Q outputs.
The J and K inputs must be stable one set-up time prior to
the HIGH-to-LOW clock transition for predictable
operation.
The reset (nR) is an asynchronous active LOW input.
When LOW, it overrides the clock and data inputs, forcing
the Q output LOW and the Q output HIGH.
Schmitt-trigger action in the clock input makes the circuit
highly tolerant to slower clock rise and fall times.
QUICK REFERENCE DATA
GND = 0 V; T
amb
= 25
°C;
t
r
= t
f
= 6 ns
TYPICAL
SYMBOL
t
PHL
/ t
PLH
PARAMETER
propagation delay
nCP to nQ
nCP to nQ
nR to nQ, nQ
f
max
C
I
C
PD
Notes
1. C
PD
is used to determine the dynamic power dissipation (P
D
in
µW):
P
D
= C
PD
×
V
CC2
×
f
i
+ ∑
(C
L
×
V
CC2
×
f
o
) where:
f
i
= input frequency in MHz
f
o
= output frequency in MHz
∑
(C
L
×
V
CC2
×
f
o
) = sum of outputs
C
L
= output load capacitance in pF
V
CC
= supply voltage in V
2. For HC the condition is V
I
= GND to V
CC
For HCT the condition is V
I
= GND to V
CC
−
1.5 V.
ORDERING INFORMATION
See
“74HC/HCT/HCU/HCMOS Logic Package Information”.
maximum clock frequency
input capacitance
power dissipation
capacitance per flip-flop
notes 1 and 2
C
L
= 15 pF;
V
CC
= 5 V
16
16
16
78
3.5
30
16
18
17
73
3.5
30
ns
ns
ns
MHz
pF
pF
CONDITIONS
HC
HCT
UNIT
December 1990
2
PHILIPS [ NXP SEMICONDUCTORS ]
