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.