74AC16543 Datasheet, PDF (1/9 Pages) Texas Instruments – 16-BIT REGISTERED TRANSCEIVERS WITH 3-STATE OUTPUTS

54AC16543, 74AC16543
16-BIT REGISTERED TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCAS125B – MARCH 1990 – REVISED APRIL 1996
D Members of the Texas Instruments
Widebus ™ Family
D 3-State True Outputs
54AC16543 . . . WD PACKAGE
74AC16543 . . . DL PACKAGE
(TOP VIEW)
D Flow-Through Architecture Optimizes
1OEAB 1
56 1OEBA
PCB Layout
D Distributed V_CC and GND Pin Configuration
Minimizes High-Speed Switching Noise
D EPIC ™ (Enhanced-Performance Implanted
CMOS) 1-µm Process
D 500-mA Typical Latch-Up Immunity at
125°C
D Package Options Include Plastic 300-mil
Shrink Small-Outline (DL) Package Using
25-mil Center-to-Center Pin Spacings and
380-mil Fine-Pitch Ceramic Flat (WD)
Package Using 25-mil Center-to-Center Pin
Spacings
1LEAB 2
1CEAB 3
GND 4
1A1 5
1A2 6
V_CC 7
1A3 8
1A4 9
1A5 10
GND 11
1A6 12
1A7 13
1A8 14
2A1 15
55 1LEBA
54 1CEBA
53 GND
52 1B1
51 1B2
50 V_CC
49 1B3
48 1B4
47 1B5
46 GND
45 1B6
44 1B7
43 1B8
42 2B1
description
2A2 16
2A3 17
41 2B2
40 2B3
The ’AC16543 are 16-bit registered transceivers
that contain two sets of D-type latches for
temporary storage of data flowing in either
direction. They can be used as two 8-bit
transceivers or one 16-bit transceiver. Separate
latch-enable (LEAB or LEBA) and output-enable
GND 18
2A4 19
2A5 20
2A6 21
V_CC 22
2A7 23
39 GND
38 2B4
37 2B5
36 2B6
35 V_CC
34 2B7
(OEAB or OEBA) inputs are provided for each
2A8 24 33 2B8
register to permit independent control in either
GND 25 32 GND
direction of data flow.
2CEAB 26 31 2CEBA
The A-to-B enable (CEAB) input must be low to
enter data from A or to output data to B. Having
2LEAB 27
2OEAB 28
30 2LEBA
29 2OEBA
CEAB low and LEAB low makes the A-to-B latches transparent; a subsequent low-to-high transition at LEAB
puts the A latches in the storage mode. Data flow from B to A is similar, but requires using the CEBA, LEBA,
and OEBA inputs.
The 74AC16543 is packaged in TI’s shrink small-outline package, which provides twice the I/O pin count and
functionality of standard small-outline packages in the same printed-circuit-board area.
The 54AC16543 is characterized for operation over the full military temperature range of –55°C to 125°C. The
74AC16543 is characterized for operation from –40°C to 85°C.
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.
EPIC and Widebus are trademarks of 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.
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Copyright © 1996, Texas Instruments Incorporated
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