74ACT16254 16-BIT ADDRESS/DATA MULTIPLEXER WITH 3-STATE OUTPUTS

SCAS527A - AUGUST 1995 - NOVEMBER 1995

features

• Member of the Texas Instruments Widebus^TM Family
• Latch-Up Performance Exceeds 500 mA Per JEDEC Standard JESD-17
• Bus-Hold Inputs Eliminate the Need for External Pullup Resistors
• Typical V_OLP (Output Ground Bounce) < 0.8 V at V_CC = 5 V, T_A = 25°C
• Distributed V_CC and GND Pin Configuration Minimizes High-Speed Switching Noise
• Packaged in Plastic Thin Shrink Small-Outline (DGG) Package

  Widebus is a trademark of Texas Instruments Incorporated.

description

The 74ACT16254 is a dual 16-bit, noninverting bus-interfacedevice. The A and C ports perform a transceiver function, like thatof the 74ACT245. The B and C ports perform the buffer/driver functionof the 74ACT244. The A and C port outputs are designed to sink up to12 mA.

The 74ACT16254 is designed for asynchronous communication betweendata buses. The control function implementation minimizesexternaltiming requirements.

Data transmission from the A port to the C port, C port to A port,or B port to C port is accomplished by setting the appropriate logiclevels on the bus enable (EN1 and EN2) inputs.

All outputs are disabled when logic highs are placed on both EN1and EN2; the buses are effectively isolated.

The 74ACT16254 is packaged in TI's thin shrink small-outlinepackage (DGG), which provides twice the I/O pin count andfunctionality of standard small-outline packages in the sameprinted-circuit-board area.

Active bus-hold circuitry is provided to hold unused or floatingdata and I/O pins at a valid logic level.

The 74ACT16254 is characterized for operation from -40°C to85°C.

View more information about generic part numbers:74ACT16254

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