CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper I.C. Handling Procedures.
Copyright © Harris Corporation 1994 1
SEMICONDUCTOR
CD54HC74/3A
CD54HCT74/3A
Dual D Flip-Flop with Set and Reset
Functional Diagram
RESET
DATA
RESET
SET
1
2
3
13
5
6Q
Q
10
CLOCK
4
SET
DATA 12
11
9
8Q
Q
CLOCK
D
CP
R
F/F 2
SGND = PIN 7
VCC = PIN 14
D
CP
R
F/F 1
S
Description
The CD54HC74/3A and CD54HCT74/3A 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.
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 posi-
tive-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.
The CD54HCT logic f amily is functionally as well as pin com-
patible with the standard 54LS logic family.
HCT INPUT LOAD TABLE
INPUT UNIT LOAD (NOTE 1)
D 0.5
R 0.5
CP 0.7
S 0.75
NOTE:
1. Unit load is ∆ICC limit specified in DC Electrical Specifications
Table, e.g., 360µA Max at +25oC.
June 1997
File Number 3768
Absolute Maximum Ratings
DC Supply Voltage, VCC
Voltages Referenced to GND . . . . . . . . . . . . . . . . . -0.5V to +7.0V
DC Input Voltage Range, All Inputs, VIN. . . . . . . -0.5V to VCC +0.5V
DC Output Voltage Range, All Outputs, VOUT . . -0.5V to VCC +0.5V
DC Input Diode Current, IIK
For VI < -0.5V or VI > VCC + 0.5V . . . . . . . . . . . . . . . . . . . . . .±20mA
DC Output Diode Current, IOK
For VO < -0.5V or VO > VCC + 0.5V. . . . . . . . . . . . . . . . . . . . .±20mA
DC Drain Current, Per Output, IO, For -0.5V < VO < VCC + 0.5V
Standard Output. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .±25mA
Bus Driver Output. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .±35mA
DC VCC or GND Current, ICC
Standard Output. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .±50mA
Bus Driver Output. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .±70mA
Power Dissipation Per Package, PD
TA = -55oC to +100oC (Package F) . . . . . . . . . . . . . . . . . . 500mW
TA = +100oC to +125oC (Package F) . . . . . . . . Derate Linearly at
8mW/oC to 300mW
Operating Temperature Range, TA
Package Type F. . . . . . . . . . . . . . . . . . . . . . . . . .-55oC to +125oC
Storage Temperature, TSTG . . . . . . . . . . . . . . . . . .-65oC to +150oC
Lead Temperature (During Soldering)
At Distance 1/16in. ± 1/32in. (1.59mm ± 0.79mm)
From Case For 10s Max . . . . . . . . . . . . . . . . . . . . . . . . . . +265oC
Unit Inserted Into a PC Board (Min Thickness 1/16in., 1.59mm)
With Solder Contacting Lead Tips Only. . . . . . . . . . . . . . . +300oC
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation
of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
Recommended Operating Conditions
Supply Voltage Range, VCC
TA = Full Package Temperature Range
CD54HC Types. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2V to 6V
CD54HCT Types. . . . . . . . . . . . . . . . . . . . . . . . . . . . .4.5V to 5.5V
DC Input or Output Voltage, VIN, VOUT. . . . . . . . . . . . . . . 0V to VCC
Operating Temperature Range, TA . . . . . . . . . . . . .-55oC to +125oC
Input Rise and Fall Times, tR, tF
at 2V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0ns to 1000ns
at 4.5V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0ns to 500ns
at 6V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0ns to 400ns
COMING SOON!
COMPLETE DATA SHEET
