SN74ABT16646

SN54ABT16646, SN74ABT16646 16-BIT BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS SCBS212D – JUNE 1992 – REVISED JULY 1999 D Members of the Texas Instruments Widebus™ Family D State-of-the-Art EPIC-ΙΙB™ BiCMOS Design Significantly Reduces Power Dissipation D Latch-Up Performance Exceeds 500 mA Per JESD 17 D Typical VOLP (Output Ground Bounce) < 1 V at VCC = 5 V, TA = 25°C D Distributed VCC and GND Pin Configuration Minimizes High-Speed Switching Noise D Flow-Through Architecture Optimizes PCB Layout D High-Drive Outputs (–32-mA IOH, 64-mA IOL) D Package Options Include Plastic Shrink Small-Outline (DL), Thin Shrink Small-Outline (DGG) Packages and 380-mil Fine-Pitch Ceramic Flat (WD) Package Using 25-mil Center-to-Center Spacings description The ’ABT16646 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. These devices can be used as two 8-bit transceivers or one 16-bit transceiver. 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 ’ABT16646 devices. SN54ABT16646 . . . WD PACKAGE SN74ABT16646 . . . DGG OR DL PACKAGE (TOP VIEW) 1DIR 1 1CLKAB 2 1SAB 3 GND 4 1A1 5 1A2 6 VCC 7 1A3 8 1A4 9 1A5 10 GND 11 1A6 12 1A7 13 1A8 14 2A1 15 2A2 16 2A3 17 GND 18 2A4 19 ...