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ꢊ ꢌꢊ ꢍꢅ ꢎꢏꢆ ꢐ ꢑꢆꢎꢄ ꢒꢍꢆ ꢓꢔ ꢕ ꢖ ꢄꢗ ꢔ ꢍꢖ ꢄꢐ ꢔꢀ
ꢘ ꢗꢆ ꢇ ꢑ ꢄꢕ ꢎꢙ
SCBS136M − MAY 1992 − REVISED OCTOBER 2003
D
Support Mixed-Mode Signal Operation
(5-V Input and Output Voltages With
D
D
I
Supports Partial-Power-Down-Mode
off
Operation
3.3-V V
)
CC
Bus Hold on Data Inputs Eliminates the
Need for External Pullup/Pulldown
Resistors
D
D
Typical V
<0.8 V at V
(Output Ground Bounce)
= 3.3 V, T = 25°C
A
OLP
CC
Support Unregulated Battery Operation
Down To 2.7 V
D
D
Latch-Up Performance Exceeds 500 mA Per
JESD 17
D
Buffered Clock and Direct-Clear Inputs
Individual Data Input to Each Flip-Flop
ESD Protection Exceeds JESD 22
− 2000-V Human-Body Model (A114-A)
− 200-V Machine Model (A115-A)
D
SN54LVTH273 . . . J PACKAGE
SN74LVTH273 . . . DB, DW, NS, OR PW PACKAGE
(TOP VIEW)
SN54LVTH273 . . . FK PACKAGE
(TOP VIEW)
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
CLR
1Q
1D
2D
2Q
3Q
3D
4D
4Q
V
CC
8Q
8D
7D
7Q
6Q
6D
5D
5Q
CLK
3
2
1
20 19
18
2D
2Q
3Q
3D
4D
8D
17 7D
4
5
6
7
8
16
15
14
7Q
6Q
6D
9 10 11 12 13
GND
description/ordering information
These octal D-type flip-flops are designed specifically for low-voltage (3.3-V) V
capability to provide a TTL interface to a 5-V system environment.
operation, but with the
CC
The ’LVTH273 devices are positive-edge-triggered flip-flops with a direct-clear input. 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 pulse. Clock triggering occurs at a particular voltage level and is not directly related to the
transition time of the positive-going pulse. When the clock (CLK) input is at either the high or low level, the
D-input signal has no effect at the output.
ORDERING INFORMATION
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
†
PACKAGE
T
A
Tube
SN74LVTH273DW
SN74LVTH273DWR
SN74LVTH273NSR
SN74LVTH273DBR
SN74LVTH273PW
SN74LVTH273PWR
SNJ54LVTH273J
SOIC − DW
LVTH273
Tape and reel
Tape and reel
Tape and reel
Tube
SOP − NS
LVTH273
LXH273
−40°C to 85°C
−55°C to 125°C
SSOP − DB
TSSOP − PW
LXH273
Tape and reel
Tube
CDIP − J
SNJ54LVTH273J
LCCC − FK
Tube
SNJ54LVTH273FK
SNJ54LVTH273FK
†
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 2003, Texas Instruments Incorporated
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1
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