Philips 74hc hct377 DATASHEETS
INTEGRATED CIRCUITS
DATA SH EET
For a complete data sheet, please also download:
•The IC06 74HC/HCT/HCU/HCMOS Logic Family Specifications
•The IC06 74HC/HCT/HCU/HCMOS Logic Package Information
•The IC06 74HC/HCT/HCU/HCMOS Logic Package Outlines
74HC/HCT377
Octal D-type flip-flop with data
enable; positive-edge trigger
Product specification
File under Integrated Circuits, IC06
December 1990
Philips Semiconductors Product specification
Octal D-type flip-flop with data enable;
positive-edge trigger
FEATURES
• Ideal for addressable register applications
• Data enable for address and data synchronization
applications
• Eight positive-edge triggered D-type flip-flops
• See “273” for master reset version
• See “373” for transparent latch version
• See “374” for 3-state version
• Output capability: standard
• ICC category: MSI
QUICK REFERENCE DATA
GND = 0 V; T
=25°C; tr=tf= 6 ns
amb
SYMBOL PARAMETER CONDITIONS
t
PHL
f
max
C
C
I
PD
/ t
PLH
propagation delay CP to Q
n
maximum clock frequency 77 53 MHz
input capacitance 3.5 3.5 pF
power dissipation capacitance per flip-flop notes 1 and 2 20 20 pF
GENERAL DESCRIPTION
The 74HC/HCT377 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/HCT377 have eight edge-triggered, D-type
flip-flops with individual D inputs and Q outputs. A common
clock (CP) input loads all flip-flops simultaneously when
the data enable (E) is LOW. The state of each D input, one
set-up time before the LOW-to-HIGH clock transition, is
transferred to the corresponding output (Qn) of the flip-flop.
TheE input must be stable only one set-up time prior to the
LOW-to-HIGH transition for predictable operation.
CL= 15 pF; VCC= 5 V 13 14 ns
74HC/HCT377
TYPICAL
UNIT
HC HCT
Notes
1. C
is used to determine the dynamic power dissipation (PD in µW):
PD
PD=CPD× V
2
× fi+∑ (CL× V
CC
2
× fo) where:
CC
fi= input frequency in MHz
fo= output frequency in MHz
∑ (CL× V
2
× fo) = sum of outputs
CC
CL= output load capacitance in pF
VCC= supply voltage in V
2. For HC the condition is VI= GND to V
CC
For HCT the condition is VI= GND to VCC− 1.5 V
ORDERING INFORMATION
“74HC/HCT/HCU/HCMOS Logic Package Information”
See
.
December 1990 2
Philips Semiconductors Product specification
Octal D-type flip-flop with data enable;
74HC/HCT377
positive-edge trigger
PIN DESCRIPTION
PIN NO. SYMBOL NAME AND FUNCTION
1
2, 5, 6, 9, 12, 15, 16, 19 Q
3, 4, 7, 8, 13, 14, 17, 18 D
10 GND ground (0 V)
11 CP clock input (LOW-to-HIGH, edge-triggered)
20 V
E data enable input (active LOW)
to Q
0
to D
0
CC
7
7
flip-flop outputs
data inputs
positive supply voltage
Fig.1 Pin configuration. Fig.2 Logic symbol. Fig.3 IEC logic symbol.
December 1990 3
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