FEATURES
First LVD only Active Terminator
Meets SCSI SPI-2 Ultra2 (Fast-40), SPI-3 Ultra3
/ Ultra160 (Fast-80) and SPI-4 (Fast-160)
Ultra320 Standards
2.7-V to 5.25-V Operation
Differential Failsafe Bias

DESCRIPTION
The UCC5640 is an active terminator for low voltage
differential (LVD) SCSI networks. This LVD only design
allows the user to reach peak bus performance while
reducing system cost. The device is designed as an
active Y-terminator to improve the frequency response
of the LVD bus. Designed with a 1.5-pF channel
capacitance, the UCC5640 allows for minimal bus
loading for a maximum number of peripherals. With the
UCC5640, the designer will be able to comply with the
Fast-40 SPI-2, Fast-80 SPI-3 and Fast-160 SPI-4
specifications. The UCC5640 also provides a much
needed system migration path for ever improving SCSI
system standards. This device is available in the 24-pin
TSSOP and 28-pin TSSOP for ease of layout use.
The UCC5640 is not designed for use in single ended
(SE) or high voltage differential (HVD) systems.