SN74F243DR

更新时间： 2024-11-18 13:01:27

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德州仪器 - TI		总线收发器输出元件
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数据手册

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SN74F243DR 数据手册

SN54F243, SN74F243

QUADRUPLE BUS TRANSCEIVERS

WITH 3-STATE OUTPUTS

SDFS086 – MARCH 1987 – REVISED OCTOBER 1993

SN54F243 . . . J PACKAGE

SN74F243 . . . D OR N PACKAGE

(TOP VIEW)

• Asynchronous Communication Between

Data Buses

• Local Bus-Latch Capability

• True Logic

• Package Options Include Plastic

Small-Outline Packages, Ceramic Chip

Carriers, and Standard Plastic and Ceramic

300-mil DIPs

OEAB

OEBA

description

GND

These quadruple bus transceivers are designed

for asynchronous communications between data

buses. Thecontrolfunctionimplementationallows

for maximum flexibility in timing. 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 (OEBA

and OEAB) inputs. The output-enable inputs can

be used to disable the device so that the buses are

effectively isolated.

SN54F243 . . . FK PACKAGE

(TOP VIEW)

20 19

The dual-enable configuration gives the

quadruple bus transceivers the capability to store

data by simultaneous enabling of OEBA and

OEAB. Each output reinforces its input in this

transceiverconfiguration. Thus, whenbothcontrol

inputs are enabled and all other data sources to

the two sets of bus lines are at high impedance,

both sets of bus lines (eight in all) remain at their

states. The 4-bit codes appearing on the two sets

of buses will be identical for the ′F243.

9 10 11 12 13

NC – No internal connection

The SN54F243 is characterized for operation over

the full military temperature range of –55°C to

125°C. The SN74F243 is characterized for

operation from 0°C to 70°C.

FUNCTION TABLE

INPUTS

FUNCTION

OEBA

OEAB

A to B

B to A

Isolation

Latch A and B

(A = B)

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.

2–1

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

12 3 4 5

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