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SN54BCT544JT Datasheet(PDF) 1 Page - Texas Instruments |
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SN54BCT544JT Datasheet(HTML) 1 Page - Texas Instruments |
1 / 6 page SN54BCT544, SN74BCT544 OCTAL REGISTERED TRANSCEIVERS WITH 3-STATE OUTPUTS SCBS039B – NOVEMBER 1988 – REVISED NOVEMBER 1993 Copyright © 1993, Texas Instruments Incorporated 1 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 • State-of-the-Art BiCMOS Design Significantly Reduces ICCZ • ESD Protection Exceeds 2000 V Per MIL-STD-883C, Method 3015 • Power-Up High-Impedance State • 3-State Inverting Outputs • Back-to-Back Registers for Storage • Package Options Include Plastic Small-Outline (DW) Packages, Ceramic Chip Carriers (FK) and Flatpacks (W), and Plastic and Ceramic 300-mil DIPs (JT, NT) description The ′BCT544 octal registered transceiver contains two sets of D-type latches for temporary storage of data flowing in either direction. Separate latch-enable (LEAB or LEBA) and output-enable (OEAB or OEBA) inputs are provided for each register to permit independent control in either direction of data flow. The A-to-B enable (CEAB) input must be low in order to enter data from A or to output data from B. If CEAB is low and LEAB is low, the A-to-B latches are transparent; a subsequent low-to-high transition of LEAB puts the A latches in the storage mode. With CEAB and OEAB both low, the 3-state B outputs are active and reflect the inverted data present at the output of the A latches. Data flow from B to A is similar, but requires using the CEBA, LEBA, and OEBA inputs. The SN54BCT544 is characterized for operation over the full military temperature range of – 55 °C to 125 °C. The SN74BCT544 is characterized for operation from 0 °C to 70°C. FUNCTION TABLE† INPUTS OUTPUT CEAB LEAB OEAB A B H X X X Z L XH X Z L HL X B0‡ L LL L H L L L H L † A-to-B data flow is shown; B-to-A flow control is the same except that it uses CEBA, LEBA, and OEBA. ‡ Output level before the indicated steady-state input conditions were established. SN54BCT544 . . . JT OR W PACKAGE SN74BCT544 . . . DW OR NT PACKAGE (TOP VIEW) 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 LEBA OEBA A1 A2 A3 A4 A5 A6 A7 A8 CEAB GND VCC CEBA B1 B2 B3 B4 B5 B6 B7 B8 LEAB OEAB SN54BCT544 . . . FK PACKAGE (TOP VIEW) 32 1 28 27 12 13 5 6 7 8 9 10 11 25 24 23 22 21 20 19 B2 B3 B4 NC B5 B6 B7 A2 A3 A4 NC A5 A6 A7 426 14 15 16 17 18 NC – No internal connection 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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