SN54AHCT273, SN74AHCT273
OCTAL D-TYPE FLIP-FLOPS
WITH CLEAR
SCLS375E – JUNE 1997 – REVISED APRIL 2002
SN54AHCT273 . . . J OR W PACKAGE
SN74AHCT273 . . . DB, DGV, DW, N, NS, OR PW PACKAGE
(TOP VIEW)
Inputs Are TTL-Voltage Compatible
Contain Eight Flip-Flops With Single-Rail
Outputs
CLR
1Q
1D
2D
2Q
3Q
3D
4D
4Q
V
CC
Direct Clear Input
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
8Q
8D
7D
7Q
6Q
6D
Individual Data Input to Each Flip-Flop
Applications Include:
– Buffer/Storage Registers
– Shift Registers
– Pattern Generators
Latch-Up Performance Exceeds 250 mA Per
JESD 17
13 5D
12 5Q
ESD Protection Exceeds JESD 22
– 2000-V Human-Body Model (A114-A)
– 200-V Machine Model (A115-A)
11
GND
CLK
SN54AHCT273 . . . FK PACKAGE
(TOP VIEW)
– 1000-V Charged-Device Model (C101)
description
Thesedevicesarepositive-edge-triggeredD-type
flip-flops with a direct clear (CLR) input.
3
2
1
20 19
18
2D
2Q
3Q
3D
4D
8D
17 7D
4
5
6
7
8
Information at the data (D) inputs meeting the
setup time requirements is transferred to the
Q outputs on the positive-going edge of the clock
(CLK) pulse. Clock triggering occurs at a
particular voltage level and is not directly related
to the transition time of the positive-going pulse.
When CLK is at either the high or low level, the
D input has no effect at the output.
16
15
14
7Q
6Q
6D
9 10 11 12 13
ORDERING INFORMATION
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
†
PACKAGE
T
A
PDIP – N
Tube
SN74AHCT273N
SN74AHCT273N
Tube
SN74AHCT273DW
SN74AHCT273DWR
SN74AHCT273NSR
SN74AHCT273DBR
SN74AHCT273PWR
SOIC – DW
AHCT273
Tape and reel
Tape and reel
Tape and reel
Tape and reel
Tape and reel
Tube
–40°C to 85°C
SOP – NS
AHCT273
HB273
SSOP – DB
TSSOP – PW
TVSOP – DGV
CDIP – J
HB273
SN74AHCT273DGVR HB273
SNJ54AHCT273J
SNJ54AHCT273W
SNJ54AHCT273FK
SNJ54AHCT273J
–55°C to 125°C
CFP – W
Tube
SNJ54AHCT273W
SNJ54AHCT273FK
LCCC – FK
Tube
†
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.
Copyright 2002, Texas Instruments Incorporated
UNLESS OTHERWISE NOTED this document contains PRODUCTION
DATA information 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.
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265