54ACT16651 Datasheet | Texas Instruments

D Members of the Texas Instruments Widebus ™ Family D Inputs Are TTL-Voltage patible D Inverting Data Paths D Independent Registers and Enables for A and B Buses D Multiplexed Real-Time and Stored Data D Flow-Through Architecture Optimizes PCB Layout D Distributed VCC and GND Pin Configurations Minimize High-Speed Switching Noise D EPIC™ (Enhanced-Performance Implanted CMOS) 1-µm Process D 500-m A Typical Latch-Up Immunity at 125°C D Packaged in Plastic 300-mil Shrink Small-Outline (DL) Packages and 380-mil Fine-Pitch Ceramic Flat (WD) Packages Using 25-mil Center-to-Center Pin Spacings description The SN54ACT16651 and 74ACT16651 are 16-bit bus transceivers that consist of D-type flip-flops and control circuitry arranged for multiplexed transmission of data directly from the data bus or from the internal storage registers. These devices can be used as two 8-bit transceivers or one 16-bit transceiver. plementary 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. A low input level selects real-time data, and a high input level selects stored data. 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. Figure 1 illustrates the four fundamental bus-management functions that can be performed with the SN54ACT16651 and 74ACT16651. SN54ACT16651, 74ACT16651 16-BIT TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS SCAS449A - FEBRUARY 1993 - REVISED APRIL 1996 SN54ACT16651 . . . WD PACKAGE 74ACT16651 . . . DL PACKAGE (TOP VIEW) 1OEAB 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 2A5 20 2A6 21 VCC 22 2A7 23 2A8 24 GND 25 2SAB 26 2CLKAB 27 2OEAB 28 56 1OEBA 55 1CLKBA 54 1SBA 53 GND 52 1B1 51 1B2 50 VCC 49 1B3 48 1B4 47 1B5 46 GND 45 1B6 44 1B7 43...