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The Fairchild Switch FST6800 provides 10-bits of highspeed CMOS TTL-compatible bus switching. The low on resistance of the switch allows inputs to be connected to outputs without adding propagation delay or generating additional ground bounce noise. The device precharges the B Port to a selectable bias voltage (BiasV) to minimize live insertion noise.
The device is organized as a 10-bit switch with a bus enable (OE) signal. When OE is LOW, the switch is ON and Port A is connected to Port B. When OE is HIGH, the switch is OPEN and the B Port is precharged to BiasV through an equivalent 10-kΩ resistor.
FST6800 Maximum Ratings
Supply Voltage (VCC) ................................................−0.5V to +7.0V DC Switch Voltage (VS) .............................................−0.5V to +7.0V Bias V Voltage Range................................................ −0.5V to +6.0V DC Input Voltage (VIN) (Note 2)............................... −0.5V to +7.0V DC Input Diode Current (lIK) VIN<0V ......................................−50mA DC Output (IOUT) Sink Current ..............................................128mA DC VCC/GND Current (ICC/IGND) .....................................+/− 100mA Storage Temperature Range (TSTG) ..................−65°C to +150 °C
FST6800 Features
• 4Ω switch connection between two ports. • Minimal propagation delay through the switch. • Low lCC. • Zero bounce in flow-through mode. • Output precharge to minimize live insertion noise. • Control inputs compatible with TTL level.