DESCRIPTION
The M74HCT257 is an high speed CMOS QUAD 2 CHANNEL MULTIPLEXER (3-STATE) fabricated with silicon gate C2MOS technology.

■ HIGH SPEED : tPD = 13 ns (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)
■ SYMMETRICAL OUTPUT IMPEDANCE: |IOH| = IOL = 6mA (MIN)
■ BALANCED PROPAGATION DELAYS: tPLH ≅ tPHL
■ PIN AND FUNCTION COMPATIBLE WITH 74 SERIES 257