M54HCT157/158 M74HCT157/158 HCT157 QUAD 2 CHANNEL.
STMicroelectronics
M74HCT157 - QUAD 2 CHANNEL MULTIPLEXER
M54HCT157/158 M74HCT157/158 HCT157 QUAD 2 CHANNEL MULTIPLEXER HCT158 QUAD 2 CHANNEL MULTIPLEXER (INV.) . HIGH SPEED tPD = 21 ns (TYP.) AT VCC = 5 V .