DESCRIPTION
The 74LCX257 is a low voltage CMOS QUAD 2 CHANNEL MULTIPLEXER (3-STATE) fabricated with sub-micron silicon gate and double-layer metal wiring C2MOS technology. It is ideal for low power and high speed 3.3V applications; it can be interfaced to 5V signal environment for both inputs and outputs.
   
■ 5V TOLERANT INPUTS AND OUTPUTS
■ HIGH SPEED :
    tPD = 6.0 ns (MAX.) at VCC = 3V
■ POWER DOWN PROTECTION ON INPUTS
    AND OUTPUTS
■ SYMMETRICAL OUTPUT IMPEDANCE:
    |IOH| = IOL = 24mA (MIN) at VCC = 3V
■ PCI BUS LEVELS GUARANTEED AT 24 mA
■ BALANCED PROPAGATION DELAYS: tPLH ≅ tPHL
■ OPERATING VOLTAGE RANGE:
    VCC(OPR) = 2.0V to 3.6V (1.5V Data
    Retention)
■ PIN AND FUNCTION COMPATIBLE WITH
    74 SERIES 257
■ LATCH-UP PERFORMANCE EXCEEDS
    500mA (JESD 17)
■ ESD PERFORMANCE:
    HBM > 2000V (MIL STD 883 method 3015);
    MM > 200V