74AC11651 OCTAL BUS TRANSCEIVER AND REGISTER WITH 3-STATE OUTPUTS

SCAS135 - MARCH 1990 - REVISED APRIL 1993

features

Independent Registers and Enables for A and B Buses
Multiplexed Real-Time and Stored Data
Inverting Data Paths
Flow-Through Architecture Optimizes PCB Layout
Center-Pin V_CC and GND Configurations Minimize High-Speed Switching Noise
EPIC ^TM (Enhanced-Performance Implanted CMOS) 1-m Process
500-mA Typical Latch-Up Immunity at 125°C
Package Options Include Plastic Small-Outline Packages and Standard Plastic 300-mil DIPs

EPIC is a trademark of Texas Instruments

description

These devices consist of bus transceiver circuits, D-typeflip-flops, and control circuitry arranged for multiplexedtransmission of data directly from the data bus or from the internalstorage registers. Output-enable (OEAB and ) inputs are provided to controlthe transceiver functions. The select-control (SAB and SBA) inputsare provided to select whether real-time or stored data istransferred. A low input level selects real-time data, and a highinput level selects stored data. Figure 1 illustrates the fourfundamental bus-management functions that can be performed with the74AC11651.

Data on the A or B bus, or both, can be stored in the internal Dflip-flops by low-to-high transitions at the appropriate clock (CLKABor CLKBA) inputs regardless of the select- or enable-control pins.When SAB and SBA are in the real-time transfer mode, it is alsopossible to store data without using the internal D-type flip-flopsby simultaneously enabling OEAB and . In this configuration, each output reinforces itsinput. Thus, when all the other data sources to the two sets of buslines are at high impedance, each set will remain at its last state.

The 74AC11651 is characterized for operation from -40°C to85°C.

Title: OCTAL BUS TRANSCEIVER AND REGISTER WITH 3-STATE OUTPUTS
Product Family: STANDARD TRANSCEIVERS
Device Functionality: OCTAL BUS TRANSCEIVER/REGISTER
Orderable Devices: 74AC11651DW

View the complete PDF datasheet: scas135.pdf (133 K Bytes) (Requires Acrobat Reader 3.x)

View more information about generic part numbers:74AC11651

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