LX5203

TermPwr Voltage ......................................................................................................... +7V
Signal Line Voltage ............................................................................................ 0V to +7V
Regulator Output Current ........................................................................................... 0.4A
Operating Junction Temperature
Plastic (N, DP Packages) ....................................................................................... 150°C
Storage Temperature Range ...................................................................... -65°C to 150°C
Lead Temperature (Soldering, 10 seconds) ............................................................. 300°C

The LX5203 is a nine-line active terminator for the SCSI parallel bus. This SCSI standard recommends active termination at both ends of the SCSI bus.

During disconnect mode, the LX5203 requires a meager 60µA of supply current, while offering only 6pF 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, error-free communications.

During normal operation, the LX5203 consumes only 600µA of current. Linfinity's proprietary BiCMOS low dropout regulator architecture enables oscillation-free operation with minimal output capacitance. Linfinity recommends a minimum stabilization capacitor value of 2.2µF.

The LX5203 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 LX 5203 sinks up to 150mA of current making it compatible with today's fast active negation drivers.

The LX5203 is a superior, pin-for-pin replacement for a variety of industry products such as the UC5603 and UC5613.