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参数资料
| 型号： | SN74ALS642ADW |
| 厂商： | Texas Instruments, Inc. |
| 元件分类： | 总线收发器 |
| 英文描述： | OCTAL BUS TRANSCEIVERS WITH OPEN-COLLECTOR OUTPUTS |
| 中文描述： | 八路总线收发器集电极开路输出 |
| 文件页数： | 1/7页 |
| 文件大小： | 115K |
| 代理商： | SN74ALS642ADW |
SN74ALS641A, SN74ALS642A, SN74AS641
OCTAL BUS TRANSCEIVERS
WITH OPEN-COLLECTOR OUTPUTS
SDAS300 – MARCH 1995
Copyright
1995, Texas Instruments Incorporated
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
Bidirectional Bus Transceivers in
High-Density 20-Pin Packages
Choice of True or Inverting Logic
Package Options Include Plastic
Small-Outline (DW) Packages and
Standard Plastic (N) 300-mil DIPs
DEVICE
LOGIC
SN74ALS641A, SN74AS641
True
SN74ALS642A
Inverting
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
upon the level at the direction-control (DIR) input. The output-enable (OE) input disables the device so that the
buses are effectively isolated.
The -1 versions of the SN74ALS641A and SN74ALS642A are identical to the standard versions, except that
the recommended maximum IOL is increased to 48 mA in the -1 versions.
The SN74ALS641A, SN74ALS642A, and SN74AS641 are characterized for operation from 0
°C to 70°C.
FUNCTION TABLE
INPUTS
OPERATION
OE
DIR
SN74ALS641A
SN74AS641
SN74ALS642A
L
B data to A bus
L
H
A data to B bus
H
X
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
SN74ALS641A, SN74AS641
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
SN74ALS642A
These symbols are in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
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)
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.
相关PDF资料 |
PDF描述 |
|---|---|
| SN74ALS642AN | OCTAL BUS TRANSCEIVERS WITH OPEN-COLLECTOR OUTPUTS |
| SN74ALS645ADW | OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS |
| SN74ALS645ADWR | OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS |
| SN74ALS645AN | OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS |
| SN74ALS645AN3 | OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS |
相关代理商/技术参数 |
参数描述 |
|---|---|
| SN74ALS642A-IN | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Texas Instruments 功能描述: |
| SN74ALS642AN | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Texas Instruments 功能描述: |
| SN74ALS643A-1N | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Texas Instruments 功能描述: |
| SN74ALS644A-1DW | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| SN74ALS644AN | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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