LX5202 Datasheet | Microsemi

LIN D O C #: 5202 1 8 - LI N E , µ P O W E R S C S I T E R M I N AT O R N F I N I T E N N O VA T I O N R O D U C T I O N DESCRIPTION The LX5202 is an eighteen-line active terminator for the SCSI parallel bus. This SCSI standard remends active termination at both ends of the SCSI bus. During disconnect mode, the LX5202 requires a meager 60µA of supply current while offering only 6p F of output capacitance. To enter this low-power mode, the disconnect pin can be left open (floating) or driven high, 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, errorfree munications. During normal operation, the LX5202 consumes only 800µA of current, which is the lowest enabled supply current of any terminator available on the market today. Linfinity's proprietary Bi CMOS low dropout regulator architecture enables this unique and very efficient operating characteristic. The LX5202 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 LX5202 sinks up to 200m A of current making it patible with today's fast active negation drivers. The LX5202 is a superior, pin-for-pin replacement for a variety of industry products such as the UC5601 and UC5602. K E Y F E AT U R E S s 6p F OUTPUT CAPACITANCE DURING DISCONNECT s 60µA SUPPLY CURRENT IN DISCONNECT MODE s 800µA SUPPLY CURRENT DURING NORMAL OPERATION s 200m A SINK CURRENT FOR ACTIVE NEGATION s LOGIC MAND DISCONNECTS ALL TERMINATION LINES s CURRENT LIMIT AND THERMAL PROTECTION s PATIBLE WITH SCSI 1, 2...