SN54BCT25245 Datasheet, PDF (1/5 Pages) Texas Instruments – 25ohm OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS

• State-of-the-Art BiCMOS Design
Significantly Reduces I_CCZ
• ESD Protection Exceeds 2000 V Per
MIL-STD-883C, Method 3015; Exceeds
200 V Using Machine Model (C = 200 pF,
R = 0)
• 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
• Package Options Include Plastic
Small-Outline (DW) Packages, Ceramic
Chip Carriers (FK) and Flatpacks (W), and
Standard Plastic and Ceramic 300-mil DIPs
(JT, NT)
description
The ′BCT25245 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.
These transceivers are 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 SN54BCT25245 is characterized for opera-
tion over the full military temperature range of
– 55°C to 125°C. The SN74BCT25245 is
characterized for operation from 0°C to 70°C.
SN54BCT25245, SN74BCT25245
25-Ω OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCBS053B – MAY 1990 – REVISED APRIL 1994
SN54BCT25245 . . . JT OR W PACKAGE
SN74BCT25245 . . . 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
SN54BCT25245 . . . FK PACKAGE
(TOP VIEW)
B3
V_CC
B2
NC
B1
DIR
A1
4 3 2 1 28 27 26
5
25
6
24
7
23
8
22
9
21
10
20
11
19
12 13 14 15 16 17 18
OE
A8
GND
NC
A7
A6
GND
NC – No internal connection
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 © 1994, Texas Instruments Incorporated
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