Features: Fully compliant with Ultra2, Ultra3, andUltra 160/m SCSI Provides Multimode Low VoltageDifferential/Single-Ended (LVD/SE)termination for 9 signal line pairs Auto-selection of LVD or SE termination 5% tolerance on SE and LVD terminationresistance Low power down capacitance of 3 pF Onboar...
DS2117M: Features: Fully compliant with Ultra2, Ultra3, andUltra 160/m SCSI Provides Multimode Low VoltageDifferential/Single-Ended (LVD/SE)termination for 9 signal line pairs Auto-selection of LVD or SE te...
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The DS2117M Ultra3 LVD/SE SCSI Terminator is both a Low Voltage Differential (LVD) and Single-Ended (SE) terminator. The multimode operation enables the designer to implement LVD in currentproducts while allowing the end-user SE backward compatibility with legacy devices. If the device isconnected in an LVD-only bus, the DS2117M will use LVD termination. If any SE devices are connectedto the bus, the DS2117M will use SE termination. This is accomplished automatically inside the part bysensing the voltage on the SCSI bus DIFFSENS line.
For the LVD termination, the DS2117M integrates two current sources with nine precision resistorstrings. For the SE termination, one regulator and nine precision 110-ohm resistors are used. ThreeDS2117M terminators are needed for a wide SCSI bus.