SN74AC74PWRG4 Datasheet, PDF (1/23 Pages) Texas Instruments – DUAL POSITIVE-EDGE-TRIGGERED D-TYPE FLIP-FLOPS WITH CLEAR AND PRESET

SN54AC74, SN74AC74
DUAL POSITIVEĆEDGEĆTRIGGERED DĆTYPE FLIPĆFLOPS
WITH CLEAR AND PRESET
SCAS521F − AUGUST 1995 − REVISED OCTOBER 2003
D 2-V to 6-V V_CC Operation
D Inputs Accept Voltages to 6 V
D Max t_pd of 10 ns at 5 V
description/ordering information
The ’AC74 devices are dual positive-edge-
triggered D-type flip-flops.
A low level at the preset (PRE) or clear (CLR) input
sets or resets the outputs, regardless of the levels
of the other inputs. When PRE and CLR are
inactive (high), data at the data (D) input meeting
the setup-time requirements is transferred to the
outputs on the positive-going edge of the clock
pulse. Clock triggering occurs at a voltage level
and is not directly related to the rise time of the
clock pulse. Following the hold-time interval, data
at D can be changed without affecting the levels
at the outputs.
SN54AC74 . . . J OR W PACKAGE
SN74AC74 . . . D, DB, N, NS, OR PW PACKAGE
(TOP VIEW)
1CLR 1
1D 2
1CLK 3
1PRE 4
1Q 5
1Q 6
GND 7
14 V_CC
13 2CLR
12 2D
11 2CLK
10 2PRE
9 2Q
8 2Q
SN54AC74 . . . FK PACKAGE
(TOP VIEW)
1CLK
NC
1PRE
NC
1Q
3 2 1 20 19
4
18
5
17
6
16
7
15
8
14
9 10 11 12 13
2D
NC
2CLK
NC
2PRE
NC − No internal connection
ORDERING INFORMATION
TA
PACKAGE†
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
PDIP − N
Tube
SN74AC74N
SN74AC74N
SOIC − D
Tube
Tape and reel
SN74AC74D
SN74AC74DR
AC74
−40°C to 85°C
SOP − NS
SSOP − DB
Tape and reel
Tape and reel
SN74AC74NSR
SN74AC74DBR
AC74
AC74
TSSOP − PW
Tube
Tape and reel
SN74AC74PW
SN74AC74PWR
AC74
CDIP − J
Tube
SNJ54AC74J
SNJ54AC74J
−55°C to 125°C CFP − W
Tube
SNJ54AC74W
SNJ54AC74W
LCCC − FK
Tube
SNJ54AC74FK
SNJ54AC74FK
† _{Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are}
available at www.ti.com/sc/package.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265
Copyright  2003, Texas Instruments Incorporated
On products compliant to MILĆPRFĆ38535, all parameters are tested
unless otherwise noted. On all other products, production
processing does not necessarily include testing of all parameters.
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