DESCRIPTION

The LX5212 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 LX5212 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 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

■ 2.5pF OUTPUT CAPACITANCE DURING DISCONNECT

■ 500nA SUPPLY CURRENT IN DISCONNECT MODE

■ 600µA SUPPLY CURRENT DURING NORMAL OPERATION

■ 30mA SINK CURRENT FOR ACTIVE NEGATION

■ LOGIC COMMAND DISCONNECTS ALL TERMINATION LINES

■ CURRENT LIMIT AND THERMAL PROTECTION

■ COMPATIBLE WITH SCSI 1, 2, 3, AND FAST 20 STANDARDS

■ HOT SWAP COMPATIBLE

■ CONSULT FACTORY FOR APPLICATION TEST REPORT: 5212TR

■ EVALUATION BOARD AVAILABLE