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SN54ABT652A Dataheets PDF



Part Number SN54ABT652A
Manufacturers Texas Instruments
Logo Texas Instruments
Description OCTAL REGISTERED TRANSCEIVERS
Datasheet SN54ABT652A DatasheetSN54ABT652A Datasheet (PDF)

D State-of-the-Art EPIC-ΙΙB™ BiCMOS Design Significantly Reduces Power Dissipation D ESD Protection Exceeds 2000 V Per MIL-STD-883, Method 3015; Exceeds 200 V Using Machine Model (C = 200 pF, R = 0) D Latch-Up Performance Exceeds 500 mA Per JEDEC Standard JESD-17 D Typical VOLP (Output Ground Bounce) < 1 V at VCC = 5 V, TA = 25°C D High-Drive Outputs (–32-mA IOH, 64-mA IOL) D Package Options Include Plastic Small-Outline (DW), Shrink Small-Outline (DB), and Thin Shrink Small-Outline (PW) Package.

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D State-of-the-Art EPIC-ΙΙB™ BiCMOS Design Significantly Reduces Power Dissipation D ESD Protection Exceeds 2000 V Per MIL-STD-883, Method 3015; Exceeds 200 V Using Machine Model (C = 200 pF, R = 0) D Latch-Up Performance Exceeds 500 mA Per JEDEC Standard JESD-17 D Typical VOLP (Output Ground Bounce) < 1 V at VCC = 5 V, TA = 25°C D High-Drive Outputs (–32-mA IOH, 64-mA IOL) D Package Options Include Plastic Small-Outline (DW), Shrink Small-Outline (DB), and Thin Shrink Small-Outline (PW) Packages, Ceramic Chip Carriers (FK), Ceramic Flat (W) Package, and Plastic (NT) and Ceramic (JT) DIPs description SN54ABT652A, SN74ABT652A OCTAL REGISTERED TRANSCEIVERS WITH 3-STATE OUTPUTS SCBS072F – JANUARY 1991 – REVISED MAY 1997 SN54ABT652A . . . JT OR W PACKAGE SN74ABT652A . . . DB, DW, NT, OR PW PACKAGE (TOP VIEW) CLKAB 1 SAB 2 OEAB 3 A1 4 A2 5 A3 6 A4 7 A5 8 A6 9 A7 10 A8 11 GND 12 24 VCC 23 CLKBA 22 SBA 21 OEBA 20 B1 19 B2 18 B3 17 B4 16 B5 15 B6 14 B7 13 B8 SN54ABT652A . . . FK PACKAGE (TOP VIEW) OEAB SAB CLKAB NC VCC CLKBA SBA 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 either real-time or stored data for transfer. 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 ’ABT652A. 4 3 2 1 28 27 26 A1 5 25 OEBA A2 6 24 B1 A2 7 23 B2 NC 8 22 NC A4 9 21 B3 A5 10 20 B4 A6 11 19 B5 12 13 14 15 16 17 18 A7 A8 GND NC B8 B7 B6 NC – No internal connection 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 inputs. 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. When all other data sources to the two sets of bus lines are at high impedance, each set of bus lines remains at its last state. To ensure the high-impedance state during power up or power down, OEBA should be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver (B to A). OEAB should be tied to GND through a pulldown resistor; the minimum value of the resistor is determined by the current-sourcing capability of the driver (A to B). Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. EPIC-ΙΙB is a trademark of Texas Instruments Incorporated. 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. Copyright © 1997, Texas Instruments Incorporated • POST OFFICE BOX 655303 DALLAS, TEXAS 75265 1 SN54ABT652A, SN74ABT652A OCTAL REGISTERED TRANSCEIVERS WITH 3-STATE OUTPUTS SCBS072F – JANUARY 1991 – REVISED MAY 1997 description (continued) The SN54ABT652A is characterized for operation over the full military temperature range of –55°C to 125°C. The SN74ABT652A is characterized for operation from –40°C to 85°C. INPUTS OEAB OEBA CLKAB CLKBA SAB FUNCTION TABLE DATA I/O† SBA A1–A8 B1–B8 OPERATION OR FUNCTION L H H or L H or L X X Input Input Isolation L H ↑ ↑ X X Input Input X H ↑ H or L X X Input Unspecified‡ H H ↑ ↑ X‡ X Input Output L X H or L ↑ X X Unspecified‡ Input L L ↑ ↑ X X‡ Output Input Store A and B data Store A, hold B Store A in both registers Hold A, store B Store B in both registers L L X X X L Output Input Real-time B data to A bus L L X H or L X H Output Input Stored B data to A bus H H X X L X Input Output Real-time A data to B bus H H H or L X H X Input Output Stored A data to B bus H L H or L H or L H H Output Output Stored A data to B bus and stored B data to A bus † The data-output functions may be enabled or disabled by a variety of level combinations at OEAB or OEBA. Data-input functions are always enabled; i.e., data at the bus terminals is stored on every low-to-high transition of the clock inputs. ‡ Select control = L; clocks can occ.


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