SN54LVTH16543, SN74LVTH16543
3.3-V ABT 16-BIT REGISTERED TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCBS699D – JULY 1997 – REVISED APRIL 1999
SN54LVTH16543 . . . WD PACKAGE
SN74LVTH16543 . . . DGG OR DL PACKAGE
(TOP VIEW)
Members of the Texas Instruments
Widebus Family
State-of-the-Art Advanced BiCMOS
Technology (ABT) Design for 3.3-V
Operation and Low Static-Power
Dissipation
1OEAB
1LEAB
1CEAB
GND
1OEBA
1LEBA
1CEBA
GND
1
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
2
3
Support Mixed-Mode Signal Operation (5-V
Input and Output Voltages With 3.3-V V
4
)
1A1
1B1
5
CC
1A2
1B2
6
Support Unregulated Battery Operation
Down to 2.7 V
V
V
7
CC
CC
1A3
1A4
1A5
GND
1A6
1A7
1A8
2A1
2A2
2A3
GND
2A4
2A5
2A6
1B3
1B4
1B5
GND
1B6
1B7
1B8
2B1
2B2
2B3
GND
2B4
2B5
2B6
8
I
and Power-Up 3-State Support Hot
off
9
Insertion
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
Bus Hold on Data Inputs Eliminates the
Need for External Pullup/Pulldown
Resistors
Typical V
< 0.8 V at V
(Output Ground Bounce)
OLP
= 3.3 V, T = 25°C
CC
A
Distributed V
Minimizes High-Speed Switching Noise
and GND Pin Configuration
CC
Flow-Through Architecture Optimizes PCB
Layout
Latch-Up Performance Exceeds 500 mA Per
JESD 17
V
V
CC
CC
ESD Protection Exceeds 2000 V Per
MIL-STD-883, Method 3015; Exceeds 200 V
Using Machine Model (C = 200 pF, R = 0)
2A7
2A8
GND
2CEAB
2LEAB
2OEAB
2B7
2B8
GND
2CEBA
2LEBA
2OEBA
Package Options Include Plastic Shrink
Small-Outline (DL) and Thin Shrink
Small-Outline (DGG) Packages and 380-mil
Fine-Pitch Ceramic Flat (WD) Package
Using 25-mil Center-to-Center Spacings
description
The ’LVTH16543 devices are 16-bit registered transceivers designed for low-voltage (3.3-V)V operation, but
CC
with the capability to provide a TTL interface to a 5-V system environment. These devices can be used as two
8-bit transceivers or one 16-bit transceiver. Separate latch-enable (LEAB or LEBA) and output-enable (OEAB
or OEBA) inputs are provided for each register to permit independent control in either direction of data flow.
The A-to-B enable (CEAB) input must be low to enter data from A or to output data from B. If CEAB is low and
LEAB is low, the A-to-B latches are transparent; a subsequent low-to-high transition of LEAB puts the A latches
inthestoragemode. WithCEABandOEABbothlow, the3-stateBoutputsareactiveandreflectthedatapresent
at the output of the A latches. Data flow from B to A is similar but requires using the CEBA, LEBA, and OEBA
inputs.
Active bus-hold circuitry is provided to hold unused or floating data inputs at a valid logic level.
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.
Widebus is a trademark of Texas Instruments Incorporated.
Copyright 1999, 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.
1
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