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SN74BCT652NTE4 Datasheet(PDF) 1 Page - Texas Instruments |
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SN74BCT652NTE4 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 16 page SN54BCT652, SN74BCT652 OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS SCBS038A – AUGUST 1989 – REVISED NOVEMBER 1993 Copyright © 1993, Texas Instruments Incorporated 2–1 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; Exceeds 200 V Using Machine Model (C = 200 pF, R = 0) • Independent Registers and Enables for A and B Buses • Multiplexed Real-Time and Stored Data • Power-Up High-Impedance Mode • Package Options Include Plastic Small-Outline (DW) Packages, Ceramic Chip Carriers (FK) and Flatpacks (W), and Standard Plastic and Ceramic 300-mil DIPs (JT, NT) description These devices consist of bus transceiver circuits, D-type flip-flops, and control circuitry arranged for multiplexed transmission of data directly from the data bus or from the internal storage registers. Output-enable (OEAB and OEBA) inputs are provided to control the transceiver functions. Select-control (SAB and SBA) inputs are provided to select whether real-time or stored data is transferred. The circuitry used for select control eliminates the typical decoding glitch that occurs in a multiplexer during the transition between stored and real-time data. A low input selects real-time data, and a high input selects stored data. Figure 1 illustrates the four fundamental bus-management functions that can be performed with the ′BCT652. Data on the A or B data bus, or both, can be stored in the internal D-type flip-flops by low-to-high transitions at the appropriate clock (CLKAB or CLKBA) inputs regardless of the select- or enable-control pins. When SAB and SBA are in the real-time transfer mode, it is possible to store data without using the internal D-type flip-flops by simultaneously enabling OEAB and OEBA. In this configuration each output reinforces its input. Therefore, when all other data sources to the two sets of bus lines are at high impedance, each set of bus lines remain at its last state. The SN54BCT652 is characterized for operation over the full military temperature range of – 55 °C to 125°C. The SN74BCT652 is characterized for operation from 0 °C to 70°C. 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 CLKAB SAB OEAB A1 A2 A3 A4 A5 A6 A7 A8 GND VCC CLKBA SBA OEBA B1 B2 B3 B4 B5 B6 B7 B8 SN54BCT652 ...JT OR W PACKAGE SN74BCT652 ... DW OR NT PACKAGE (TOP VIEW) 32 1 13 14 5 6 7 8 9 10 11 OEBA B1 B2 NC B3 B4 B5 A1 A2 A3 NC A4 A5 A6 4 15 16 17 18 28 27 26 25 24 23 22 21 20 19 12 SN54BCT652 . . . FK PACKAGE (TOP VIEW) 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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