Dallas Semiconductor DS2117M Ultra3 LVD/SE SCSI Terminator Datasheet

This data sheet provides detailed information on the DS2117M Ultra3 LVD/SE SCSI Terminator, including features, characteristics, pin assignments, and description.

Brand: Dallas Semiconductor
Document type: Datasheet
Language: English
Pages: 9
File format: PDF
File size: 128 KB
Published: 03 July, 2012
Updated: 01 October, 2023
MD5 checksum: B5ADA91DDA067E74991190F2CDBC4E91
PDF: Dallas Semiconductor DS2117M Ultra3 LVD/SE SCSI Terminator Datasheet PDF

About this manual

The DS2117M is an Ultra3 LVD/SE SCSI terminator designed for both Low Voltage Differential (LVD) and Single-Ended (SE) operation. It automatically selects the appropriate termination mode by sensing the voltage on the DIFFSENS line, ensuring compatibility with legacy SE devices while supporting current LVD products.

What's inside

Features
Functional Description
SCSI Bus Configuration
Pin Description
Recommended Operating Conditions
Single Ended Characteristics
Low Voltage Differential Characteristics
DC Characteristics
Regulator Characteristics
Package Dimensions

Specifications

SE Termination Resistance (Typical)	110 Ohms
LVD Differential Mode Termination Resistance (Typical)	110 Ohms
Operating Temperature Range	0 to 70 °C
Thermal Shutdown Threshold	150 °C
SE Output Current (Typical)	25.4 mA

Frequently asked questions

How does the DS2117M determine which termination mode to use?

The device automatically selects LVD or SE termination by sensing the voltage on the SCSI bus DIFFSENS line.

How many DS2117M terminators are required for a wide SCSI bus?

Three DS2117M terminators are needed for a wide SCSI bus.

What capacitance must be placed between the Vref pin and ground?

A 4.7 uF capacitor is required between the Vref pin and ground.

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