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 25? 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:

5? (VS3V257) and 25? (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