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SN54ABT646

Texas Instruments
Part Number SN54ABT646
Manufacturer Texas Instruments
Description OCTAL BUS TRANSCEIVERS/REGISTERS
Published May 20, 2023
Detailed Description • State-of-the-Art EPIC-ΙΙB™ BiCMOS Design Significantly Reduces Power Dissipation • ESD Protection Exceeds 2000 V Per M...
Datasheet PDF File SN54ABT646 PDF File

SN54ABT646
SN54ABT646

Overview
• State-of-the-Art EPIC-ΙΙB™ BiCMOS Design Significantly Reduces Power Dissipation • ESD Protection Exceeds 2000 V Per MIL-STD-883C, Method 3015; Exceeds 200 V Using Machine Model (C = 200 pF, R = 0) • Latch-Up Performance Exceeds 500 mA Per JEDEC Standard JESD-17 • Typical VOLP (Output Ground Bounce) < 1 V at VCC = 5 V, TA = 25°C • High-Drive Outputs (– 32-mA IOH, 64-mA IOL ) • Package Options Include Plastic Small-Outline (DW), Shrink Small-Outline (DB), and Thin Shrink Small-Outline (PW) Packages, Ceramic Chip Carriers (FK), and Plastic (NT) and Ceramic (JT) DIPs description SN54ABT646, SN74ABT646 OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS SCBS068E – JULY 1991 – REVISED JULY 1994 SN54ABT646 .
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JT PACKAGE SN74ABT646 .
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DB, DW, NT, OR PW PACKAGE (TOP VIEW) CLKAB 1 SAB 2 DIR 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 OE 20 B1 19 B2 18 B3 17 B4 16 B5 15 B6 14 B7 13 B8 SN54ABT646 .
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FK PACKAGE (TOP VIEW) DIR 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 input bus or from the internal registers.
Data on the A or B bus is clocked into the registers on the low-to-high transition of the appropriate clock (CLKAB or CLKBA) input.
Figure 1 illustrates the four fundamental bus-management functions that can be performed with the ′ABT646.
Output-enable (OE) and direction-control (DIR) inputs are provided to control the transceiver functions.
In the transceiver mode, data present at the high-impedance port may be stored in either register or in both.
4 3 2 1 28 27 26 A1 5 25 OE A2 6 24 B1 A3 7 23 B2 NC 8 22 NC A4 9 21 B3 A5 10 20 B4 A6 1112 13 14 15 16 17 1819 B5 A7 A8 GND NC B8 B7 B6 NC – No internal connection The select-control (SAB and SBA) inputs can multiplex stored and real-time (transparent mode) data.
The direction control (DIR) determines which bus will r...


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