SN54ABT16265, SN74ABT16265
12-BIT TO 24-BIT MULTIPLEXED TRANSCEIVERS
WITH 3-STATE OUTPUTS

SCBS468 - JUNE 1992-REVISED OCTOBER 1992

features

• Members of the Texas Instruments Widebus^TM Family
• State-of-the-Art EPIC-IIB ^TM BiCMOS Design Significantly Reduces Power Dissipation
• ESD Protection Exceeds 2000 V Per MIL-STD-883C, Method 3015; Exceeds 200 V Using Machine Model (C = 200 pF, R = 0)
• Latch-Up Performance Exceeds 500 mA Per JEDEC Standard JESD-17
• Typical V_OLP (Output Ground Bounce) < 1 V at V_CC = 5 V, T_A = 25°C
• Distributed V_CC and GND Pin Configuration Minimizes High-Speed Switching Noise
• Flow-Through Architecture Optimizes PCB Layout
• High-Drive Outputs (-32-mA I_OH, 64-mA I_OL)
• Bus-Hold Inputs Eliminate the Need for External Pullup Resistors
• Packaged in Plastic 300-mil Shrink Small-Outline Packages (DL) and 380-mil Fine-Pitch Ceramic Flat Packages (WD) Using 25-mil Center-to-Center Spacings

Widebus and EPIC-IIB are trademarks of Texas Instruments Incorporated.

description

The 'ABT16265 is a 12-bit to 24-bit multiplexed transceiver used in applications where two separate data paths must be multiplexed onto, or demultiplexed from, a single data path. Typical applications include multiplexing and/or demultiplexing of address and data information in microprocessor- or bus-interface applications. This device is also useful in memory-interleaving applications.

Three 12-bit I/O ports (A1-A12, 1B1-1B12, and 2B1-2B12) are available for address and/or data transfer. The output-enable (, , and ) inputs control the bus transceiver functions. These control signals also allow byte-control of the most significant byte and least significant byte for each bus.

Active bus-hold circuitry is provided to hold unused or floating inputs at a valid logic level.

To ensure the high-impedance state during power up or power down, should be tied to V_CC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.

The SN74ABT16265 is packaged in TI's shrink small-outline package (DL), which provides twice the I/O pin count and functionality of standard small-outline packages in the same printed-circuit-board area.

The SN54ABT16265 is characterized for operation over the full military temperature range of -55°C to 125°C. The SN74ABT16265 is characterized for operation from -40°C to 85°C.