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SN74BCT25642NTE4 Folha de dados(PDF) 1 Page - Texas Instruments

Nome de Peças SN74BCT25642NTE4
Descrição Electrónicos  25-廓 OCTAL BUS TRANSCEIVER
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Fabricante Electrônico  TI [Texas Instruments]
Página de início  http://www.ti.com
Logo TI - Texas Instruments

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SN74BCT25642
25 Ω OCTAL BUS TRANSCEIVER
SCBS047C − DECEMBER 1989 − REVISED NOVEMBER 1993
Copyright
1993, Texas Instruments Incorporated
2−1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251−1443
State-of-the-Art BiCMOS Design
Significantly Reduces ICCZ
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
or Greater
Distributed V
CC and GND Pins Minimize
Noise Generated by the Simultaneous
Switching of Outputs
The A Port Features Open-Collector
Outputs That Provide 188-mA IOL to Allow
for Heavy DC Loading on Open-Collector
Outputs
Eliminates Need for 3-State Overlap
Protection on A Ports
Package Options Include Plastic
Small-Outline (DW) Packages and Standard
Plastic 300-mil DIPs (NT)
description
This 25-
Ω octal bus transceiver 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 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 SN74BCT25642 is capable of sinking 188-mA IOL (A port), which facilitates switching 25-Ω transmission
lines on the incident wave. It is designed specifically to improve both the performance and density of 3-state
memory address drivers, clock drivers, and bus-oriented transceivers. The distributed VCC and GND pins
minimize the noise generated by the simultaneous switching of the outputs.
The SN74BCT25642 is characterized for operation from 0
°C to 70°C.
FUNCTION TABLE
INPUTS
OPERATION
OE
DIR
OPERATION
L
L
B data to A bus
L
HA data to B bus
H
X
Isolation
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
A1
GND
A2
A3
GND
A4
A5
GND
A6
A7
GND
A8
DIR
B1
B2
VCC
B3
B4
B5
B6
VCC
B7
B8
OE
DW OR NT PACKAGE
(TOP VIEW)
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.


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