General Description
The VS3V257 is a high-speed LVTTL–compatible Quad 2:1 multiplexer/demultiplexer. The VS3V257 contains four mux/demux channels, with a common path control (S) and active low enable (/E). The low ON resistance of the VS3V257 allows inputs to be connected to outputs, without adding propagation delay and without generating additional signal noise. The VS3V2257 has 25Ω resistors in series with the switches to reduce ground-bounce noise and signal reflection.
   
Features
• Enhanced N-FET with no DC path to VCC
    or GND in normal operating signal voltage
    range.
• Low impedance switches connect inputs to
    outputs with near-zero propagation delay:
    5Ω (VS3V257) and 25Ω (VS3V2257)
• Pin-compatible with 74LVC257 or
    equivalent logic devices
• Zero added ground bounce or signal noise
• Break-before-make feature
• Undershoot clamp diodes on all switch and
    control pins
• ESD rating >2000V (Human Body Model)
• or >200V (Machine Model)
• Latch-up current >100mA
• Available in 150-mil wide QSOP package
   
Applications
• 3.3V to 2.5V translation
• 2.5V to 1.8V translation
• Hot-Swapping
• Logic replacement
• Memory bank, video, and audio
    switching