Configurable 4-Bit To 20-Bit Bus Switch With -2V Undershoot Protection And Selectable Level Shifting And 25?٠Series Resistors In Outputs

The Fairchild Universal Bus Switch FSTUD162450 pro- vides 4-bit, 5-bit, 8-bit, 10-bit, 16-bit, 20-bit of high-speed CMOS TTL-compatible bus switching. The low On Resis- tance of the Switch allows inputs to be connected to out- puts without adding propagation delay or generating additional ground bounce noise. The FSTUD162450 is designed to allow customer config- uration control of the enable connections. The device CAN be organized as either a five 4-bit, four 5-bit, two 10-bit or one 20-bit bus Switch Also available are 8-bit and 16-bit enabled configurations (see Functional Description). The device's bit configuration is controlled through select pin Logic (see Truth Table). When OEx is LOW, Port Ax is con- nected to Port Bx. When OEx is HIGH, the Switch is OPEN. The A and B Ports are protected against undershoot to support an extended range to 2.0V below ground. Fairchild's integrated Undershoot Hardened Circuit (UHC) senses undershoot at the I/O and responds by preventing voltage differentials from developing and turn- ing the Switch on. Another innovative device feature is the addition of a level shifting select pin, S2. When S2 is LOW, the device behaves as a standard N-MOS Switch When S2 is HIGH, a Diode to VCC is integrated into the circuit allowing for level shifting between 5V inputs and 3.3V outputs. By Fairchild Semiconductor
Part Manufacturer Description Datasheet Samples
FSTUD162450GX Rochester Electronics LLC Bus Driver, CBT/FST/QS/5C/B Series, 2-Func, 8-Bit, True Output, CMOS, PBGA54, 5.50 MM, PLASTIC, MO-205, FBGA-54
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FSTUD162450 Pinout, Pinouts
FSTUD162450 pinout,Pin out
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