SN54AC573_06 Datasheet, PDF (1/13 Pages) Texas Instruments – OCTAL D-TYPE TRANSPARENT LATCHES WITH 3-STATE OUTPUTS

D 2-V to 6-V V_CC Operation
D Inputs Accept Voltages to 6 V
D Max t_pd of 9 ns at 5 V
D 3-State Outputs Drive Bus Lines Directly
description/ordering information
These 8-bit latches feature 3-state outputs
designed specifically for driving highly capacitive
or relatively low-impedance loads. The devices
are particularly suitable for implementing buffer
registers, I/O ports, bidirectional bus drivers, and
working registers.
The eight latches are D-type transparent latches.
When the latch-enable (LE) input is high, the Q
outputs follow the data (D) inputs. When LE is
taken low, the Q outputs are latched at the logic
levels set up at the D Inputs.
A buffered output-enable (OE) input can be used
to place the eight outputs in either a normal
logic state (high or low logic levels) or the
high-impedance state. In the high-impedance
state, the outputs neither load nor drive the bus
lines significantly. The high-impedance state and
increased drive provide the capability to drive bus
lines in a bus-organized system without need for
interface or pullup components.
OE does not affect the internal operations of the
latches. Old data can be retained or new data can
be entered while the outputs are in the
high-impedance state.
SN54AC573, SN74AC573
OCTAL DĆTYPE TRANSPARENT LATCHES
WITH 3ĆSTATE OUTPUTS
SCAS542D - OCTOBER 1995 − REVISED OCTOBER 2003
SN54AC573 . . . J OR W PACKAGE
SN74AC573 . . . DB, DW, N, NS, OR PW PACKAGE
(TOP VIEW)
OE ¹
1D ²
2D ³
3D ⁴
4D ⁵
5D ⁶
6D ⁷
7D ⁸
8D ⁹
GND ¹⁰
20 _VCC
19 _1Q
18 _2Q
17 _3Q
16 _4Q
15 _5Q
14 _6Q
13 _7Q
12 _8Q
11 _LE
SN54AC573 . . . FK PACKAGE
(TOP VIEW)
3D
3 2 1 20 19
4
18
2Q
4D 5
17 3Q
5D 6
16 4Q
6D 7
15 5Q
7D 8
14 6Q
9 10 11 12 13
ORDERING INFORMATION
TA
PACKAGE†
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
PDIP − N
Tube
SN74AC573N
SN74AC573N
SOIC − DW
Tube
Tape and reel
SN74AC573DW
SN74AC573DWR
AC573
−40°C to 85°C SOP − NS
Tape and reel SN74AC573NSR
AC573
SSOP − DB
Tape and reel SN74AC573DBR
AC573
TSSOP − PW
Tube
Tape and reel
SN74AC573PW
SN74AC573PWR
AC573
CDIP − J
Tube
SNJ54AC573J
SNJ54AC573J
−55°C to 125°C CFP − W
Tube
SNJ54AC573W
SNJ54AC573W
LCCC − FK
Tube
SNJ54AC573FK
SNJ54AC573FK
† _{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.
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.
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Copyright  2003, Texas Instruments Incorporated
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