Configurable 4-Bit To 20-Bit Bus Switch With -2V Undershoot Protection And Selectable Level Shifting And 25?٠Series Resistors In OutputsThe 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
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Part | Manufacturer | Description | Datasheet | Samples | |
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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 Pb-Free | FSTUD162450 Cross Reference | FSTUD162450 Schematic | FSTUD162450 Distributor |
FSTUD162450 Application Notes | FSTUD162450 RoHS | FSTUD162450 Circuits | FSTUD162450 footprint |