DESCRIPTION
It consists of four 2-input digital multiplexers with PRELIMINARY DATA BM (Plastic Package) (Micro Package) ORDER CODES : 74ACT157B 74ACT157M common select and strobe inputs. It is a non-inverting multiplexer. When the STROBE input is held High selection of data is inhibit and all the outputs become low. The SELECT decoding determines whether the A or B inputs get routed to their corresponding Y outputs. The device is designed to interface directly High Speed CMOS systems with TTL, NMOS and CMOS output voltage levels. All inputs and outputs are equipped with protection circuits against static discharge, giving them 2KV ESD immunity and transient excess voltage. PIN CONNECTION AND IEC LOGIC SYMBOLS May 1997 1/8 74ACT157 INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION
PIN No 1 2, 5, 11, 14 3, 6, 10, 13 4, 7, 9, 12 15 8 16 SYMBOL SELECT 1A to 4A 1B to 4B 1Y to 4Y STROBE GND VCC NAME AND FUNCTION Common Data Select Input Data Inputs From Source A Data Inputs From Source B M...
STMicroelectronics
