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.)