DESCRIPTION
The 74VHCT257A is an advanced high-speed CMOS QUAD 2 CHANNEL MULTIPLEXER (3-STATE) fabricated with sub-micron silicon gate and double-layer metal wiring C2MOS technology.

■ HIGH SPEED: tPD = 5.8 ns (TYP.) at VCC =5V
■ LOWPOWER DISSIPATION: ICC = 4 µA (MAX.) at TA = 25 °C
■ COMPATIBLEWITH TTL OUTPUTS: VIH = 2V (MIN), VIL = 0.8V(MAX)
■ POWER DOWN PROTECTION ON INPUTS & OUTPUTS
■ SYMMETRICAL OUTPUT IMPEDANCE: |IOH| = IOL = 8 mA (MIN)
■ BALANCEDPROPAGATIONDELAYS: tPLH ≅ tPHL
■ OPERATINGVOLTAGERANGE: VCC (OPR) = 4.5Vto 5.5V
■ PIN AND FUNCTION COMPATIBLE WITH 74 SERIES257
■ IMPROVEDLATCH-UP IMMUNITY
■ LOWNOISE: VOLP =0.8V (Max.)