16-BIT TRANSCEIVERS/REGISTERS
D Members of the Texas Instruments
Widebus ™ Family
D Inputs Are TTL-Voltage Compatible D Inverting Data Paths D Indepen...
Description
D Members of the Texas Instruments
Widebus ™ Family
D Inputs Are TTL-Voltage Compatible 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-mA 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.
Complementary 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...
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