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SN74ALS1640AN Fiches technique(PDF) 1 Page - Texas Instruments

No de pièce SN74ALS1640AN
Description  OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS
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Fabricant  TI [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI - Texas Instruments

SN74ALS1640AN Fiches technique(HTML) 1 Page - Texas Instruments

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SN74ALS1640A, SN74ALS1645A
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SDAS246B – DECEMBER 1982 – REVISED FEBRUARY 1997
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
D Bidirectional Bus Transceivers in
High-Density 20-Pin Packages
D Lower-Power Versions of SN74ALS640B
and SN74ALS645A
D Package Options Include Plastic
Small-Outline (DW) Packages and Standard
Plastic (N) 300-mil DIPs
description
These octal bus transceivers are designed for
asynchronous two-way communication between
data buses. These devices transmit data from the
A bus to the B bus or from the B bus to the A bus,
depending on the level at the direction-control
(DIR) input. The output-enable (OE) input can be used to disable the device so that the buses are effectively
isolated. The SN74ALS1640A features inverting logic, while the SN74ALS1645A features noninverting logic.
The SN74ALS1640A and SN74ALS1645A are characterized for operation from 0
°C to 70°C.
FUNCTION TABLE
INPUTS
OPERATION
OE
DIR
SN74ALS1640A
SN74ALS1645A
L
L
B data to A bus
B data to A bus
L
HA data to B bus
A data to B bus
H
X
Isolation
Isolation
logic symbols
B2
17
B3
16
B4
15
A5
6
A6
7
A7
8
A8
9
A2
3
A3
4
A4
5
OE
A1
2
G3
19
3 EN2 [AB]
B5
14
B6
13
B7
12
B8
11
B1
18
3 EN1 [BA]
1
DIR
1
2
SN74ALS1640A
B2
17
B3
16
B4
15
A5
6
A6
7
A7
8
A8
9
A2
3
A3
4
A4
5
OE
A1
2
G3
19
3 EN2 [AB]
B5
14
B6
13
B7
12
B8
11
B1
18
3 EN1 [BA]
1
DIR
1
2
SN74ALS1645A
† These symbols are in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
Copyright
© 1997, Texas Instruments Incorporated
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.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
DIR
A1
A2
A3
A4
A5
A6
A7
A8
GND
VCC
OE
B1
B2
B3
B4
B5
B6
B7
B8
DW OR N PACKAGE
(TOP VIEW)


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