View m74hct158 datasheet:

M74HCT158 QUAD 2 CHANNEL MULTIPLEXER (INV.) HIGH SPEED: tPD = 16ns (TYP.) at VCC = 4.5V LOW POWER DISSIPATION: ICC = 4µA(MAX.) at TA=25°C COMPATIBLE WITH TTL OUTPUTS : VIH = 2V (MIN.) VIL = 0.8V (MAX) DIP SOP TSSOP SYMMETRICAL OUTPUT IMPEDANCE: |IOH| = IOL = 4mA (MIN) BALANCED PROPAGATION DELAYS: tPLH ? tPHL ORDER CODES PIN AND FUNCTION COMPATIBLE WITH PACKAGE TUBE T & R 74 SERIES 158 DIP M74HCT158B1R SOP M74HCT158M1R M74HCT158RM13TR DESCRIPTION TSSOP M74HCT158TTR The M74HCT158 is an high speed CMOS QUAD 2 CHANNEL MULTIPLEXER fabricated with silicon gate C2MOS technology. become high. The SELECT decoding determines This device consists of four 2-input digital whether the A or B inputs get routed to their multiplexer with common select and strobe inputs.