The DS2118M 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 current
products while allowing the end-user SE-backward compatibility with legacy devices. If the device is connected in an LVD-only bus, the DS2118M will use LVD termination. If any SE devices are connected to the bus, the DS2118M will use SE termination. This is accomplished automatically inside the part by sensing the voltage on the SCSI bus DIFFSENS line.
For the LVD termination, the DS2118M integrates two current sources with nine precision resistor
strings. For the SE termination, one regulator and nine precision 110Ω resistors are used. Three DS2118M terminators are needed for a wide SCSI bus.
Key Features
Fully Compliant with SCSI SPI-2, SPI-3,
SPI-4, Ultra160, and Ultra320
* Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.
Devices:
1-1
of
1
DS2118M
Notes
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Package:
TYPE PINS FOOTPRINT
DRAWING CODE/VAR *
Temp
RoHS/Lead-Free? Materials Analysis
DS2118MB
5% 9-Channel LVD/SE Ultra2
N/A
SSOP;36 pin;163 mm²
Outline Drawing: 21-0056 (PDF)
Land Pattern: Not Available
Use pkgcode/variation: A36-5*
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