SN64BCT25245 Datasheet, PDF (1/5 Pages) Texas Instruments – 25-ohm OCTAL BUS TRANSCEIVER

SN64BCT25245
25-Ω OCTAL BUS TRANSCEIVER
• State-of-the-Art BiCMOS Design
Significantly Reduces I_CCZ
• Designed to Facilitate Incident-Wave
Switching for Line Impedances of 25 Ω
or Greater
• Distributed V_CC and GND Pins Minimize
Noise Generated by the Simultaneous
Switching of Outputs
• Data Flow-Through Pinout (All Inputs
on Opposite Side From Outputs)
• High-Impedance State During Power Up
and Power Down
• ESD Protection Exceeds 2000 V
Per MIL-STD-883C, Method 3015
• Package Options Include Plastic
Small-Outline (DW) Packages and Standard
Plastic 300-mil DIPs (NT)
SCBS060A – JUNE 1990 – REVISED DECEMBER 1993
DW OR NT PACKAGE
(TOP VIEW)
A1 1
GND 2
A2 3
A3 4
GND 5
A4 6
A5 7
GND 8
A6 9
A7 10
GND 11
A8 12
24 DIR
23 B1
22 B2
21 V_CC
20 B3
19 B4
18 B5
17 B6
16 V_CC
15 B7
14 B8
13 OE
description
The SN64BCT25245 is a 25-Ω octal bus transceiver designed for asynchronous communication between data
buses. It improves both the performance and density of 3-state memory address drivers, clock drivers, and
bus-oriented transceivers.
The device allows data transmission 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 disable the device so that
both buses are effectively isolated.
This transceiver is capable of sinking 188-mA I_OL, which facilitates switching 25-Ω transmission lines on the
incident wave. The distributed V_CC and GND pins minimize switching noise for more reliable system operation.
The outputs are in a high-impedance state during power up and power down while the supply voltage is less
than approximately 3 V.
The SN64BCT25245 is characterized for operation from – 40°C to 85°C and 0°C to 70°C.
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
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