DESCRIPTION

The LX5208 is an eighteen-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 LX5208 requires a meager 60µA of supply current while offering only 3.5pF 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.

KEY FEATURES

■ 3.5pF OUTPUT CAPACITANCE DURING DISCONNECT

■ 60µA SUPPLY CURRENT IN DISCONNECT MODE

■ 800µA SUPPLY CURRENT DURING NORMAL OPERATION

■ 200mA SINK CURRENT FOR ACTIVE NEGATION

■ LOGIC COMMAND DISCONNECTS ALL TERMINATION LINES

■ CURRENT LIMIT AND THERMAL PROTECTION

■ COMPATIBLE WITH SCSI 1, 2 AND 3 STANDARDS

■ CONSULT FACTORY FOR APPLICATION TEST REPORT: 5208TR