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SN54ABT16843 Datasheet(Fiches technique) 1 Page - Texas Instruments

Numéro de pièce SN54ABT16843
Description  18-BIT BUS-INTERFACE D-TYPE LATCHES WITH 3-STATE OUTPUTS
Télécharger  8 Pages
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Fabricant  TI [Texas Instruments]
Site Internet  http://www.ti.com
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SN54ABT16843, SN74ABT16843
18-BIT BUS-INTERFACE D-TYPE LATCHES
WITH 3-STATE OUTPUTS
SCBS223E – OCTOBER 1992 – REVISED MAY 1997
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
D Members of the Texas Instruments
Widebus
™ Family
D State-of-the-Art EPIC-ΙΙB™ BiCMOS Design
Significantly Reduces Power Dissipation
D Distributed VCC and GND Pin Configuration
Minimizes High-Speed Switching Noise
D Flow-Through Architecture Optimizes PCB
Layout
D High-Impedance State During Power Up
and Power Down
D High-Drive Outputs (–32-mA IOH, 64-mA IOL)
D Package Options Include Plastic Thin
Shrink Small-Outline (DGG), 300-mil Shrink
Small-Outline (DL) Packages and 380-mil
Fine-Pitch Ceramic Flat (WD) Package
Using 25-mil Center-to-Center Spacings
description
The ’ABT16843 18-bit bus-interface D-type
latches are designed specifically for driving highly
capacitive or relatively low-impedance loads.
They are particularly suitable for implementing
buffer registers, I/O ports, bidirectional bus
drivers, and working registers.
The ’ABT16843 can be used as two 9-bit latches
or one 18-bit latch. The 18 latches are transparent
D-type latches. The device provides true data at
its outputs.
A buffered output-enable (OE) input can be used
to place the nine outputs in either a normal logic
state
(high
or
low
logic
levels)
or
a
high-impedance state. The outputs are in the
high-impedance state during power up and power
down. The outputs remain in the high-impedance
state while the device is powered down. 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 without
need for interface or pullup components.
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1CLR
1OE
1Q1
GND
1Q2
1Q3
VCC
1Q4
1Q5
1Q6
GND
1Q7
1Q8
1Q9
2Q1
2Q2
2Q3
GND
2Q4
2Q5
2Q6
VCC
2Q7
2Q8
GND
2Q9
2OE
2CLR
1LE
1PRE
1D1
GND
1D2
1D3
VCC
1D4
1D5
1D6
GND
1D7
1D8
1D9
2D1
2D2
2D3
GND
2D4
2D5
2D6
VCC
2D7
2D8
GND
2D9
2PRE
2LE
SN54ABT16843 ...WD PACKAGE
SN74ABT16843 . . . DGG OR DL PACKAGE
(TOP VIEW)
Copyright
© 1997, 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.
Widebus and EPIC-
ΙΙB are trademarks of Texas Instruments Incorporated.
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.




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