SN54ABT16843 Datasheet, PDF (1/8 Pages) Texas Instruments – 18-BIT BUS-INTERFACE D-TYPE LATCHES WITH 3-STATE OUTPUTS

D Members of the Texas Instruments
Widebus™ Family
D State-of-the-Art EPIC-ΙΙB™ BiCMOS Design
Significantly Reduces Power Dissipation
D Distributed V_CC 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 I_OH, 64-mA I_OL)
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.
SN54ABT16843, SN74ABT16843
18-BIT BUS-INTERFACE D-TYPE LATCHES
WITH 3-STATE OUTPUTS
SCBS223E – OCTOBER 1992 – REVISED MAY 1997
SN54ABT16843 . . . WD PACKAGE
SN74ABT16843 . . . DGG OR DL PACKAGE
(TOP VIEW)
1CLR 1
1OE 2
1Q1 3
GND 4
1Q2 5
1Q3 6
V_CC 7
1Q4 8
1Q5 9
1Q6 10
GND 11
1Q7 12
1Q8 13
1Q9 14
2Q1 15
2Q2 16
2Q3 17
GND 18
2Q4 19
2Q5 20
2Q6 21
V_CC 22
2Q7 23
2Q8 24
GND 25
2Q9 26
2OE 27
2CLR 28
56 1LE
55 1PRE
54 1D1
53 GND
52 1D2
51 1D3
50 V_CC
49 1D4
48 1D5
47 1D6
46 GND
45 1D7
44 1D8
43 1D9
42 2D1
41 2D2
40 2D3
39 GND
38 2D4
37 2D5
36 2D6
35 V_CC
34 2D7
33 2D8
32 GND
31 2D9
30 2PRE
29 2LE
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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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 © 1997, Texas Instruments Incorporated
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