DS2118MB/T&R Maxim Integrated Products, DS2118MB/T&R Datasheet
DS2118MB/T&R
Specifications of DS2118MB/T&R
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DS2118MB/T&R Summary of contents
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FEATURES Fully Compliant with SCSI SPI-2, SPI-3, SPI-4, Ultra160, and Ultra320 Provides Multimode Low-Voltage Differential/Single-Ended (LVD/SE) Termination for Nine Signal Line Pairs Autoselection of LVD or SE Termination 5% Tolerance on SE and LVD Termination Resistance Low Power-Down Capacitance ...
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DETAILED DESCRIPTION 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. ...
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FUNCTIONAL DESCRIPTION The DS2118 combines LVD and SE termination with DIFFSENSE sourcing and detection. A bandgap reference is fed into two amplifiers, which creates a 1.25V reference voltage and a 2.85V reference voltage. The control logic determines which of these ...
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V pin in applications that use fast rise/fall time drivers. A typical SCSI bus configuration is shown in REF Figure 2. NOTES: 1) DIFFSENS. Refers to the SCSI bus signal. 2) DIFFSENSE. Refers to the DS2118M pin name and internal ...
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Figure 1. DS2118M Block Diagram ...
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Figure 2. SCSI Bus Configuration ...
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PIN DESCRIPTION PIN NAME 1 VREF 4–7, 11–16, RxP, 22–25, 29–32 RxN 8, 10, 26 GND 28 ISO 18 GND 19 MSTR/SLV 20 DIFFSENSE DIFFSENSE. Output to drive the SCSI bus DIFFSENS line. ...
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SINGLE-ENDED CHARACTERISTICS PARAMETER SE Termination Resistance SE Voltage Reference SE Output Current Output Capacitance LOW-VOLTAGE DIFFERENTIAL CHARACTERISTICS PARAMETER Differential Mode Termination Resistance Common Mode Termination Resistance Differential Mode Bias Common Mode Bias DC CHARACTERISTICS PARAMETER Termpower Current Input Leakage High ...
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REGULATOR CHARACTERISTICS PARAMETER Line Regulation Load Regulation Current Limit Sink Current NOTES 3V. LINE 0.2V. LINE 3) Guaranteed by design. 4) All lines open 2.4V. OUT ...
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... No circuit patent licenses are implied. Maxim/Dallas Semiconductor reserves the right to change the circuitry and specifications without notice at any time The Maxim logo is a registered trademark of Maxim Integrated Products, Inc. The Dallas logo is a registered trademark of Dallas Semiconductor Corporation © 2006 Maxim Integrated Products • Printed USA ...