Texas Instruments SN54F243, SN74F243 Quadruple Bus Transceivers with 3-State Outputs

查询SN54F243 供应商 SN54F243, SN74F243

QUADRUPLE BUS TRANSCEIVERS

WITH 3-STATE OUTPUTS SDFS086 – MARCH 1987 – REVISED OCTOBER 1993 Asynchronous Communication Between SN54F243 J PACKAGE

SN74F243 D OR N PACKAGE

Data Buses

(TOP VIEW)

Local Bus-Latch Capability True Logic OEAB VCC

Package Options Include Plastic NC OEBA Small-Outline Packages, Ceramic Chip A1 NC Carriers, and Standard Plastic and Ceramic A2 B1 300-mil DIPs A3 B2 A4 B3

description GND B4

These quadruple bus transceivers are designed

for asynchronous communications between data SN54F243 FK PACKAGE (TOP VIEW)

buses. The control function implementation allows 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

A1 NC

and OEAB) inputs. The output-enable inputs can

be used to disable the device so that the buses are NC NC effectively isolated. A2 B1 NC NC

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 transceiver configuration. Thus, when both control inputs are enabled and all other data sources to NC – No internal connection 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. 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

OEAB OEBA

A to B B to A Isolation Latch A and B (A = B)

PRODUCTION DATA information is current as of publication date. Copyright  1993, Texas Instruments Incorporated

Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.

2–1POST OFFICE BOX 655303 • DALLAS, TEXAS 75265