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AC74 Datasheet

  • AC74

  • DUAL POSITIVE-EDGE-TRIGGERED D-TYPE FLIP-FLOPS WITH CLEAR AN...

  • 17頁

  • TI

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SN54AC74, SN74AC74
DUAL POSITIVE EDGE TRIGGERED D TYPE FLIP FLOPS
WITH CLEAR AND PRESET
SCAS521F 鈭?AUGUST 1995 鈭?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 鈥橝C74 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
1D
1CLK
1PRE
1Q
1Q
GND
1
2
3
4
5
6
7
14
13
12
11
10
9
8
V
CC
2CLR
2D
2CLK
2PRE
2Q
2Q
SN54AC74 . . . FK PACKAGE
(TOP VIEW)
1CLK
NC
1PRE
NC
1Q
4
5
6
7
8
3 2 1 20 19
18
17
16
15
14
9 10 11 12 13
1D
1CLR
NC
VCC
2CLR
2D
NC
2CLK
NC
2PRE
NC 鈭?No internal connection
ORDERABLE
PART NUMBER
SN74AC74N
SN74AC74D
SN74AC74DR
SN74AC74NSR
SN74AC74DBR
SN74AC74PW
SN74AC74PWR
SNJ54AC74J
SNJ54AC74W
SNJ54AC74FK
AC74
SNJ54AC74J
SNJ54AC74W
SNJ54AC74FK
AC74
AC74
AC74
On products compliant to MIL PRF 38535, all parameters are tested
unless otherwise noted. On all other products, production
processing does not necessarily include testing of all parameters.
ORDERING INFORMATION
TA
PDIP 鈭?N
SOIC 鈭?D
鈭?0擄C to 85 C
鈭?0 C 85擄C
SOP 鈭?NS
SSOP 鈭?DB
TSSOP 鈭?PW
CDIP 鈭?J
鈭?5擄C to 125 C
鈭?5 C 125擄C
CFP 鈭?W
LCCC 鈭?FK
PACKAGE鈥?/div>
Tube
Tube
Tape and reel
Tape and reel
Tape and reel
Tube
Tape and reel
Tube
Tube
Tube
TOP-SIDE
MARKING
SN74AC74N
鈥?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.
Copyright
錚?/div>
2003, Texas Instruments Incorporated
POST OFFICE BOX 655303
鈥?/div>
DALLAS, TEXAS 75265
1Q
GND
NC
2Q
2Q
1

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