SN54LVTR245 Datasheet, PDF (1/7 Pages) Texas Instruments – 3.3-V ABT OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS

• State-of-the-Art Advanced BiCMOS
Technology (ABT) Design for 3.3-V
Operation and Low-Static Power
Dissipation
• Supports Mixed-Mode Signal Operation
(5-V Input and Output Voltages With
3.3-V V_CC)
• Supports Unregulated Battery Operation
Down to 2.7 V
• Typical V_OLP (Output Ground Bounce)
< 0.8 V at V_CC = 3.3 V, T_A = 25°C
• Latch-Up Performance Exceeds 500 mA
Per JEDEC Standard JESD-17
• Bus-Hold Data Inputs Eliminate the Need
for External Pullup Resistors
• Reduced Output Structure on A Port
Minimizes V_OHV
• Package Options Include Plastic
Small-Outline (DW), Shrink Small-Outline
(DB), and Thin Shrink Small-Outline (PW)
Packages, Ceramic Chip Carriers (FK), and
Ceramic DIPs (J)
description
These octal bus transceivers are designed
specifically for low-voltage (3.3-V) V_CC operation,
but with the capability to provide a TTL interface to
a 5-V system environment.
SN54LVTR245, SN74LVTR245
3.3-V ABT OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCAS428 – OCTOBER 1993
SN54LVTR245 . . . J PACKAGE
SN74LVTR245 . . . DB, DW, OR PW PACKAGE
(TOP VIEW)
DIR ₁
A1 ₂
A2 3
A3 4
A4 5
A5 6
A6 7
A7 8
A8 9
GND 10
20 ^V_CC
19 ^OE
18 B1
17 B2
16 B3
15 B4
14 B5
13 B6
12 B7
11 B8
SN54LVTR245 . . . FK PACKAGE
(TOP VIEW)
A3
3 2 1 20 19
4
18
B1
A4 ₅
17 ^B2
A5 6
16 B3
A6 7
15 B4
A7 8
14 B5
9 10 11 12 13
The ′LVTR245 is designed for asynchronous communication between data buses. The device transmits data
from the A bus to the B bus or from the B bus to the A bus depending upon the logic level at the direction-control
(DIR) input. The output-enable (OE) input can be used to disable the device so the buses are effectively isolated.
Active bus-hold circuitry is provided to hold unused or floating data inputs at a valid logic level.
The A port is designed to minimize the undershoot exhibited on high to low transition during simultaneous
switching conditions.
The SN74LVTR245 is available in TI’s shrink small-outline package (DB), which provides the same I/O pin count
and functionality of standard small-outline packages in less than half the printed-circuit-board area.
The SN54LVTR245 is characterized for operation over the full military temperature range of – 55°C to 125°C.
The SN74LVTR245 is characterized for operation from – 40°C to 85°C.
FUNCTION TABLE
INPUTS
OE DIR
OPERATION
L
L
B data to A bus
L
H
A data to B bus
H
X
Isolation
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.
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265
Copyright © 1993, Texas Instruments Incorporated
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