74HC174 Philips, 74HC174 Datasheet - Page 2

• Manufacturer Part Number: 74HC174
• Description: Hex D-type flip-flop with reset positive-edge trigger
• Manufacturer: Philips

Philips Semiconductors
FEATURES
GENERAL DESCRIPTION
The 74HC/HCT174 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.
QUICK REFERENCE DATA
GND = 0 V; T
Notes
1. C
2. For HC the condition is V
1998 Jul 08
SYMBOL
t
f
C
C
PHL
max
Six edge-triggered D-type flip-flops
Asynchronous master reset
Output capability: standard
I
I
PD
Hex D-type flip-flop with reset; positive-edge trigger
CC
f
f
C
V
For HCT the condition is V
i
o
/ t
CC
PD
= input frequency in MHz
L
category: MSI
= output frequency in MHz
(C
PLH
= output load capacitance in pF
P
= supply voltage in V
is used to determine the dynamic power dissipation (P
L
D
= C
V
amb
CC
PD
2
= 25 C; t
V
f
o
PARAMETER
propagation delay
maximum clock frequency
input capacitance
power dissipation
CC
capacitance per flip-flop
) = sum of outputs
CP to Q
MR to Q
2
r
f
i
= t
+ (C
f
I
I
n
n
= 6 ns
= GND to V
= GND to V
L
V
CC
2
CC
CC
f
o
) where:
1.5 V
2
The 74HC/HCT174 have six edge-triggered D-type
flip-flops with individual D inputs and Q outputs. The
common clock (CP) and master reset (MR) inputs load and
reset (clear) all flip-flops simultaneously.
The register is fully edge-triggered. The state of each D
input, one set-up time prior to the LOW-to-HIGH clock
transition, is transferred to the corresponding output of the
flip-flop.
A LOW level on the MR input forces all outputs LOW,
independently of clock or data inputs.
The device is useful for applications requiring true outputs
only and clock and master reset inputs that are common to
all storage elements.
CONDITIONS
notes 1 and 2
C
D
L
= 15 pF; V
in W):
CC
= 5 V
HC
17
13
99
3.5
17
TYPICAL
74HC/HCT174
Product specification
HCT
18
17
69
3.5
17
UNIT
ns
ns
MHz
pF
pF