DALLAS DS2120A handbook
Update: 30 September, 2023
The DS2120A Ultra3 LVD SCSI Terminator is a Low Voltage Differential (LVD) terminator. If the device is connected in an LVD-only bus, the DS2120A will use LVD termination. If any single-ended (SE) or high-voltage differential (HVD) devices are connected to the bus, the DS2120A will isolate itself from the SCSI bus. This is accomplished automatically inside the part by sensing the voltage on the SCSI bus DIFFSENS line. For the LVD termination, the DS2120A integrates two current sources with nine precision resistor strings. Three DS2120A terminators are needed for a wide SCSI bus.
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MD5 Checksum: D77B9508168ADFC25CCF9C95911E8812
Publication date: 03 July, 2012
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DALLAS DS2120A handbook PDF