General Description

The VS3244 and VS32244 are high-speed TTL–compatible dual 4-bit bus switches. The VS3244 contains two banks of 4-bit switches, with one common active low enable (/G) per bank. The low ON resistance of the VS3244 allows inputs to be connected to outputs, without adding propagation delay and without generating additional signal noise. The VS32244 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 (VS3244) and 25Ω (VS32244)

• Pin-compatible with QS3244 and CBT3244

switches.

• Near-zero propagation delay

• Zero added ground bounce or signal noise

• 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- Available in 150-mil wide QSOP

package

Applications

• 5V to 3.3V translation in mixed-supply environment

• Hot-swap interface

• Logic replacement

• Bus isolation