74ACT16254 Datasheet PDF

74ACT16254 16ĆBIT ADDRESS/DATA MULTIPLEXER WITH 3ĆSTATE OUTPUTS SCAS527A − AUGUST 1995 − NOVEMBER 1995 D Member of the Texas Instruments Widebus  Family D Latch-Up Performance Exceeds 500 mA Per JEDEC Standard JESD-17 D Bus-Hold Inputs Eliminate the Need for External Pullup Resistors D Typical VOLP (Output Ground Bounce) < 0.8 V at VCC = 5 V, TA = 25°C D Distributed VCC and GND Pin Configuration Minimizes High-Speed Switching Noise D Packaged in Plastic Thin Shrink Small-Outline (DGG) Package description The A and C port outputs are designed to sink up to 12 mA. The 74ACT16254 is designed for asynchronous communication between data buses. The control function implementation minimizes external timing 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 logic levels on the bus enable (EN1 and EN2) inputs. All outputs are disabled when logic highs are placed on both EN1 and EN2; the buses are effectively isolated.