Datasheet > SN54ALS640B_08

SN54ALS640B_08

更新时间： 2024-01-09 04:51:24

品牌	Logo	应用领域
德州仪器 - TI		总线收发器输出元件
页数	文件大小	规格书
18页	690K
描述
OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS

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数据手册

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SN54ALS640B_08 数据手册

SN54ALS640B, SN54AS640, SN74ALS640B, SN74AS640

OCTAL BUS TRANSCEIVERS

WITH 3-STATE OUTPUTS

SDAS122A – DECEMBER 1983 – REVISED JANUARY 1995

SN54ALS640B, SN54AS640 . . . J PACKAGE

SN74ALS640B, SN74AS640 . . . DW OR N PACKAGE

(TOP VIEW)

• Bidirectional Bus Transceivers in

High-Density 20-Pin Packages

• Inverting Logic

• Package Options Include Plastic

Small-Outline (DW) Packages, Ceramic

Chip Carriers (FK), and Standard Plastic (N)

and Ceramic (J) 300-mil DIPs

DIR

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 can be

used to disable the device so that the buses are

effectively isolated.

GND

SN54ALS640B, SN54AS640 . . . FK PACKAGE

(TOP VIEW)

The -1 version of the SN74ALS640B is identical to

the standard version, except that the

20 19

recommended maximum I for the -1 version is

increased to 48 mA. There is no -1 version of the

SN54ALS640B.

The SN54ALS640B and SN54AS640 are

characterized for operation over the full military

temperature range of –55°C to 125°C. The

9 10 11 12 13

SN74ALS640B

and

SN74AS640

are

characterized for operation from 0°C to 70°C.

FUNCTION TABLE

INPUTS

OPERATION

DIR

B data to A bus

A data to B bus

Isolation

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.

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

12 3 4 5 6 7...18

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