Octal Bidirectional Transceiver - Texas Instruments
Description
• 3-State Outputs Drive Bus Lines Directly • Package Options Include Plastic
Small-Outline (SOIC) and Shrink Small-Outline (SSOP) Packages, Ceramic Chip Carriers, and Plastic and Ceramic DIPs
description
These octal bus transceivers are designed for asynchronous communication between data buses.
The devices transmit 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.
The SN74F245 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 SN54F245 is characterized for operation over the full military temperature range of – 55°C to 125°C.
The SN74F245 is characterized for operation from 0°C to 70°C.
SN54F245, SN74F245 OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SDFS010A – MARCH 1987 – REVISED OCTOBER 1993
SN54F245 .
.
.
J PACKAGE SN74F245 .
.
.
DB, DW, OR N PACKAGE
(TOP VIEW)
DIR 1 A1 2 A2 3 A3 4 A4 5 A5 6 A6 7 A7 8 A8 9
GND 10
20 VCC 19 OE 18 B1 17 B2 16 B3 15 B4 14 B5 13 B6 12 B7 11 B8
SN54F245 .
.
.
FK PACKAGE (TOP VIEW)
OE
VC C
DIR
A1
A2
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
B6
B7
B8
GND
A8
FUNCTION TABLE
INPUTS OE DIR
OPERATION
L
L
B data to A bus
L
H
A data to B bus
H
X
Isolation
PRODUCTION DATA information is 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 2–1
SN54F245, SN74F245 OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS
SDFS010A – MARCH 1987 – REVISED OCTOBER 1993
logic symbol†
logic diagram (positive logic)
19 OE...
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