CD54HC74, CD74HC74,
CD74HCT74
Data sheet acquired from Harris Semiconductor
SCHS124
Dual D Flip-Flop with Set and Reset
Positive-Edge Trigger
January 1998
Features
Description
• Hysteresis on Clock Inputs for Improved Noise Immu-
nity and Increased Input Rise and Fall Times
The Harris CD54HC74, CD74HC74 and CD74HCT74 utilize
silicon gate CMOS technology to achieve operating speeds
equivalent to LSTTL parts. They exhibit the low power
consumption of standard CMOS integrated circuits, together
with the ability to drive 10 LSTTL loads.
[ /Title
(CD54H
C74,
CD74H
C74,
CD74H
CT74)
/Subject
(Dual D
Flip-
• Asynchronous Set and Reset
• Complementary Outputs
• Buffered Inputs
This flip-flop has independent DATA, SET, RESET and
CLOCK inputs and Q and Q outputs. The logic level present
at the data input is transferred to the output during the
positive-going transition of the clock pulse. SET and RESET
are independent of the clock and are accomplished by a low
level at the appropriate input.
• Typical f
MAX
= 50MHz at V = 5V, C = 15pF,
CC L
o
T = 25 C
A
• Fanout (Over Temperature Range)
- Standard Outputs. . . . . . . . . . . . . . . 10 LSTTL Loads
- Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads The 74HCT logic family is functionally as well as pin
compatible with the standard 74LS logic family.
o
o
• Wide Operating Temperature Range . . . -55 C to 125 C
• Balanced Propagation Delay and Transition Times
Flop
with Set
Ordering Information
TEMP. RANGE
PKG.
NO.
• Significant Power Reduction Compared to LSTTL
Logic ICs
o
PART NUMBER
CD54HC74F
CD74HC74E
CD74HCT74E
CD74HC74M
CD74HCT74M
NOTES:
( C)
PACKAGE
-55 to 125
-55 to 125
-55 to 125
-55 to 125
-55 to 125
14 Ld CERDIP F14.3
• HC Types
14 Ld PDIP
14 Ld PDIP
14 Ld SOIC
14 Ld SOIC
E14.3
- 2V to 6V Operation
- High Noise Immunity: N = 30%, N = 30% of V
CC
E14.3
IL
IH
at V
= 5V
CC
M14.15
M14.15
• HCT Types
- 4.5V to 5.5V Operation
- Direct LSTTL Input Logic Compatibility,
1. When ordering, use the entire part number. Add the suffix 96 to
obtain the variant in the tape and reel.
V = 0.8V (Max), V = 2V (Min)
IL IH
- CMOS Input Compatibility, I ≤ 1µA at V , V
OL OH
l
2. Die is available which meets all electrical specifications. Please
contact your local sales office or Harris customer service for
ordering information.
Pinout
CD54HC74, CD74HC74, CD74HCT74
(PDIP, SOIC, CERDIP)
TOP VIEW
1R
1D
1
2
3
4
5
6
7
14 V
CC
13 2R
12 2D
11 2CP
10 2S
1CP
1S
1Q
1Q
9
8
2Q
2Q
GND
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.
File Number 1476.1
Copyright © Harris Corporation 1998
1