VS3245

VS3245 / VS32245 High Speed CMOS VSwitch 8-Bit Bus Switches Applications = = 5V to 3.3V translation in mixed-supply environment Hot-swap interface = = Logic replacement Bus isolation General Description The VS3245 and VS32245 are high-speed TTL–compatible 8-bit bus switches. The VS3245 contains eight high-speed bus switches, with a common active low enable (/OE). The low ON resistance of the VS3245 allows inputs to be connected to outputs, without adding propagation delay and without generating additional signal noise. The VS32245 has 25Ω resistors in series with the switches to reduce ground-bounce noise and signal reflection. The VS3245 and VS32245 bus switches are function and pinout compatible with QS3245 and CBT3245 switches. They enable 5V to 3.3V translation when used with a diode in the power supply line. In addition, the high off-isolation in the ‘disable’ mode makes VS3245 and VS32245 ideal interface elements for hot-swap applications. Features = = = = Enhanced N-FET with no DC path to VCC or GND in normal operating signal voltage range. Low impedance bidirectional data flow: 5Ω (VS3245) and 25Ω (VS32245) Pin-compatible with QS3245 and CBT3245 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 in 150-mil wide QSOP package Figure ...