2/12/2003 - Supplying system designers with a new level of flexibility and peace of mind, Texas Instruments (TI) announced the industry´s first 27-line programmable low voltage differential (LVD) - only small computer system interface (SCSI) terminator to support the Ultra640 (SPI-5) standard. The UCC5696 allows a termination impedance to adjust to the bus loading using an I2CTM communication interface, enabling the bus to adjust to the number of disk drives installed in the system.
TI's UCC5696 terminator uses nominal settings on power up that are compliant from SPI-2 to SPI-4 standards for impedance and bias, and programmable settings, which are used for SPI-5 and beyond. The new device uses the I2C interface to program the differential impedance 5 ohm increments from 55 ohms to 135 ohms using 4 bits or 16 steps. Using the same process, it also programs the differential bias current in 50 micro-Amps (uA) from 0.7 mA to 1.45 mA.
The UCC5696 terminator is available now from TI and its authorized worldwide distributors in an 80-pin low-profile QFP package. Suggested resale pricing is $8.45 in quantities of 1,000.
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