LX5211

LIN D O C #: 5211 LX5211 9-LINE LOW CAPACITANCE, µP OWER SCSI TERMINATOR T H E I N F I N I T E P O W E R O F I N N O VA T I O N P R O D U C T I O N D A T A S H E E T DESCRIPTION The LX5211 is a nine-line active terminator for the SCSI parallel bus. The SCSI standard recommends active termination at both ends of the SCSI bus. During disconnect mode, the LX5211 requires a meager 500nA of supply current while offering only 2.5pF of output capacitance. To enter this low-power mode, the disconnect pin can be left open (floating) or driven low, thereby disconnecting the terminating resistors and placing the internal low dropout regulator into low-power mode. In disconnect mode, each termination line presents a high impedance to the SCSI bus with the overall effect being to preserve high signal integrity and yield subsequent reliable, error-free communications. During normal operation, the LX5211 consumes only 600µA of current, which is the lowest enabled supply current of any terminator available on the market today. Linfinity's proprietary BiCMOS low dropout regulator architecture enables this unique and very efficient operating characteristic. The LX5211 also offers a precisely trimmed channel output current specified to a 5% tolerance. The maximum value of the output current is trimmed as closely as possible to the SCSI standard maximum specification to give the highest possible noise margin for fast SCSI operation. And the LX5211 sinks up to 30mA of current, maki...