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SNJ54ALS243AFK Datasheet(PDF) 1 Page - Texas Instruments |
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SNJ54ALS243AFK Datasheet(HTML) 1 Page - Texas Instruments |
1 / 5 page SN54ALS243A, SN74ALS243A QUADRUPLE BUS TRANSCEIVERS WITH 3-STATE OUTPUTS SDAS069B – DECEMBER 1982 – REVISED DECEMBER 1994 Copyright © 1994, Texas Instruments Incorporated 1 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 • Two-Way Asynchronous Communication Between Data Buses • pnp Inputs Reduce dc Loading • Package Options Include Plastic Small-Outline (D) Packages, Ceramic Chip Carriers (FK), and Standard Plastic (N) and Ceramic (J) 300-mil DIPs description These quadruple bus transceivers are designed for asynchronous two-way communication between data 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 and OEAB) inputs. The output-enable inputs can be used to disable the device so that the buses are effectively isolated. The dual-enable configuration gives the quadruple bus transceivers the capability to store data by simultaneously enabling OEBA and OEAB. Each output reinforces its input in this transceiver configuration. When both control 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) retain their states. The 4-bit codes appearing on the two sets of buses are identical. The SN54ALS243A is characterized for operation over the full military temperature range of – 55 °C to 125°C. The SN74ALS243A is characterized for operation from 0 °C to 70°C. FUNCTION TABLE INPUTS FUNCTION OEAB OEBA FUNCTION L L A to B H H B to A H L Isolation L H Latch A and B (A = B) SN54ALS243A ...J PACKAGE SN74ALS243A ...D OR N PACKAGE (TOP VIEW) SN54ALS243A . . . FK PACKAGE (TOP VIEW) 32 1 20 19 910 11 12 13 4 5 6 7 8 18 17 16 15 14 NC NC B1 NC B2 A1 NC A2 NC A3 NC – No internal connection 1 2 3 4 5 6 7 14 13 12 11 10 9 8 OEAB NC A1 A2 A3 A4 GND VCC OEBA NC B1 B2 B3 B4 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. |
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