General Description
The VS3257 is a high-speed TTL–compatible Quad 2:1 multiplexer/demultiplexer. The VS3257 contains four mux/demux channels, with a common path control (S) and active low enable (/E). The low ON resistance of the VS3257 allows inputs to be connected to outputs, without adding propagation delay and without generating additional signal noise. The VS32257 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 bidirectional data flow:
    5Ω (VS3257) and 25Ω (VS32257)
• Pin-compatible with QS3257 and CBT3257
    switches.
• Near zero propagation delay
• Zero added ground bounce or signal noise
• Break-before-make feature
• TTL-compatible control signals
• 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
• 5V to 3.3V translation in mixed-supply
    environment
• Hot-swap interface
• Logic replacement
• Memory bank, video, & audio
    swtiching
• Power conservation