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.

Specifications and 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

Application Scenarios

The LX5208 active terminator can be used in SCSI systems that require reliable and error-free communications. It is compatible with SCSI 1, 2, and 3 standards, making it suitable for various SCSI applications.

Comparison

• Preserves high signal integrity
• Requires meager 60µA of supply current in disconnect mode
• Offers only 3.5pF of output capacitance during disconnect
• Compatible with SCSI 1, 2, and 3 standards

• Requires consultation with the factory for application test report
• Higher supply current (800µA) during normal operation