74AC11648 OCTAL BUS TRANSCEIVER AND REGISTER WITH 3-STATE OUTPUTS

SCAS114 - MARCH 1990 - REVISED APRIL 1993

features

Independent Registers 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

The 74AC11648 consists of bus transceiver circuits, D-typeflip-flops, and control circuitry arranged for multiplexedtransmission of data directly from the input bus or from theinternal

registers. Data on the A or B bus is clocked into the registers onthe low-to-high transition of the appropriate clock (CLKAB or CLKBA)input. Figure 1 illustrates the four fundamental bus-managementfunctions that can be performed with the 74AC11648.

Output-enable anddirection-control (DIR) inputs are provided to control thetransceiver functions. In the transceiver mode, data present at thehigh-impedance port may be stored in either register or in both.

The select-control (SAB and SBA) inputs can multiplex stored andreal-time (transparent mode) data. The direction control (DIR)determines which bus will receive data when is low. In the isolation mode( high), A datamay be stored in one register and/or B data may be stored in theother register.

When an output function is disabled, the input function is stillenabled and may be used to store and transmit data. Only one of thetwo buses, A or B, may be driven at a time.

The 74AC11648 is characterized for operation from -40°C to85°C.

Title: OCTAL BUS TRANSCEIVER AND REGISTER WITH 3-STATE OUTPUTS
Product Family: REGISTERED TRANSCEIVERS
Device Functionality: OCTAL BUS TRANSCEIVER/REGISTER
Orderable Devices: 74AC11648NT

View the complete PDF datasheet: scas114.pdf (113 K Bytes) (Requires Acrobat Reader 3.x)

View more information about generic part numbers:74AC11648

Go to the Engineering Design Center to locate information on other TI Semiconductor devices.