74HC/HCT112 Philips Semiconductors (Acquired by NXP), 74HC/HCT112 Datasheet - Page 2

• Manufacturer Part Number: 74HC/HCT112
• Description: Dual JK Flip-flop With Set And Reset; Negative-edge Trigger
• Manufacturer: Philips Semiconductors (Acquired by NXP)

Philips Semiconductors
FEATURES
GENERAL DESCRIPTION
The 74HC/HCT112 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.
The 74HC/HCT112 are dual negative-edge triggered
JK-type flip-flops featuring individual nJ, nK, clock (nCP),
set (nS
QUICK REFERENCE DATA
GND = 0 V; T
Notes
1. C
2. For HC the condition is V
1998 Jun 10
SYMBOL
t
f
C
C
PHL
max
Asynchronous set and reset
Output capability: standard
I
I
PD
Dual JK flip-flop with set and reset;
negative-edge trigger
CC
f
f
C
V
For HCT the condition is V
i
o
/ t
CC
PD
L
category: flip-flops
= input frequency in MHz
= output frequency in MHz
(C
PLH
D
P
) and reset (nR
= output load capacitance in pF
L
= supply voltage in V
is used to determine the dynamic power dissipation (P
D
= C
V
CC
amb
PD
2
PARAMETER
propagation delay
maximum clock frequency
input capacitance
power dissipation capacitance per flip-flop notes 1 and 2
= 25 C; t
nCP to nQ, nQ
nS
nR
V
f
o
CC
) = sum of outputs
D
D
to nQ, nQ
2
to nQ, nQ
D
) inputs.
f
r
i
= t
I
= GND to V
I
f
= GND to V
= 6 ns
(C
L
V
CC
2
CC
CC
f
o
) where:
1.5 V
2
CONDITIONS
C
The set and reset inputs, when LOW, set or reset the
outputs as shown in the function table regardless of the
levels at the other inputs.
A HIGH level at the clock (nCP) input enables the nJ and
nK inputs and data will be accepted. The nJ and nK inputs
control the state changes of the flip-flops as shown in the
function table. The nJ and nK inputs must be stable one
set-up time prior to the HIGH-to-LOW clock transition for
predictable operation.
Output state changes are initiated by the HIGH-to-LOW
transition of nCP.
Schmitt-trigger action in the clock input makes the circuit
highly tolerant to slower clock rise and fall times.
L
D
= 15 pF; V
in W):
CC
= 5 V
17
15
18
66
3.5
27
HC
TYPICAL
74HC/HCT112
Product specification
19
15
19
70
3.5
30
HCT
ns
ns
ns
MHz
pF
pF
UNIT