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SN74BCT620A Folha de dados(PDF) 1 Page - Texas Instruments

Nome de Peças SN74BCT620A
Descrição Electrónicos  OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS
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Fabricante Electrônico  TI [Texas Instruments]
Página de início  http://www.ti.com
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SN74BCT620A Folha de dados(HTML) 1 Page - Texas Instruments

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SN54BCT620A, SN74BCT620A
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCBS001B – SEPTEMBER 1987 – REVISED NOVEMBER 1993
Copyright
© 1993, Texas Instruments Incorporated
2–1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
State-of-the-Art BiCMOS Design
Significantly Reduces ICCZ
P-N-P Inputs Reduce DC Loading
ESD Protection Exceeds 2000 V
Per MIL-STD-883C, Method 3015
Package Options Include Plastic
Small-Outline (DW) Packages, Ceramic
Chip Carriers (FK) and Flatpacks (W), and
Plastic and Ceramic 300-mil DIPs (J, N)
description
The
′BCT620A bus transceiver is designed for
asynchronous
communication
between
data
buses. The control function implementation allows
for maximum flexibility in timing. The
′BCT620A
provides inverted data at its outputs.
These devices allow data transmission from the A
bus to the B bus or from the B bus to the A bus
depending
upon
the
logic
levels
at
the
output-enable (OEAB and OEBA) inputs.
The output-enable inputs can be used to disable
the device so that the buses are effectively
isolated. The dual-enable configuration gives the
transceivers the capability of storing data by
simultaneously enabling OEAB and OEBA. When
both OEAB and OEBA are enabled and all other
data sources to the two sets of bus lines are at high
impedance, both sets of bus lines (16 in all) will
remain at their last states. In this way, each output
reinforces its input in this configuration.
The SN54BCT620A is characterized for operation
over the full military temperature range of – 55
°C
to 125
°C. The SN74BCT620A is characterized for
operation from 0
°C to 70°C.
FUNCTION TABLE
INPUTS
OPERATION
OEBA
OEAB
OPERATION
L
L
B data to A bus
L
H
B data to A bus,
A data to B bus
H
L
Isolation
H
H
A data to B bus
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
OEAB
A1
A2
A3
A4
A5
A6
A7
A8
GND
VCC
OEBA
B1
B2
B3
B4
B5
B6
B7
B8
SN54BCT620A ...J OR W PACKAGE
SN74BCT620A . . . DW OR N PACKAGE
(TOP VIEW)
3
2
1 20 19
9 10 11 12 13
4
5
6
7
8
18
17
16
15
14
B1
B2
B3
B4
B5
A3
A4
A5
A6
A7
SN54BCT620A . . . FK 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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