SiP5678

SiP5678 New Product Vishay Siliconix 15-Line SCSI Bus Terminators FEATURES D Auto Selection of S/E or LVD SCSI Termination D 2.7-V to 5.25-V TERMPWR Range D Meets SCSI-1, SCSI-2, SPI-2 (ULTRA-2), SPI-3 (ULTRA-160) and SPI-4 (ULTRA-320) Standards D Integrated SPI-3 Mode Change Delay Filter D Differential Failsafe Bias D Thermal Package D On-Chip Thermal Shutdown Circuit D Active Negation D Hot Swap Compatible D Pin Compatible with UCC5638 D Lead (Pb)-Free SQFP-48 Package APPLICATIONS D D D D D D D Disk Array (RAID) Storage Area Networks (SAN) Network Attached Storage (NAS) SCSI Cable Server and Workstation Industrial Computers High-End Personal Computers DESCRIPTION The SiP5678 provides active bus termination suitable for all SCSI bus operational modes from SCSI-1 through SPI-4 (Ultra SCSI 320). The termination includes impedance matching of the Ultra SCSI bus to minimize signal reflections from the end of the bus, as well as required SCSI bus biasing for either S/E (single ended) or LVD (low voltage differential) operation. The SiP5678 has fifteen (15) output channels (T1−T15). Each output channel provides termination for one SCSI data signal, parity signal or control signal. Two SiP5678 ICs provide complete termination for a wide SCSI bus. An integrated mode change delay filter in the SiP5678 eliminates the need for a bulky 4.7-mF low pass filter capacitor to be compliant with SPI-3 mode change timing requirements. The SiP5678 senses the operational state of the SCSI bu...