DS2119ME+T&R/C13 Maxim Integrated, DS2119ME+T&R/C13 Datasheet

DS2119ME+T&R/C13

Manufacturer Part Number

DS2119ME+T&R/C13

Description

SCSI Interface IC

Manufacturer

Maxim Integrated

Datasheet

1.DS2119METRC13.pdf (9 pages)

Specifications of DS2119ME+T&R/C13

Rohs

yes

Current page: 1 of 9
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FEATURES

ORDERING INFORMATION

+ Denotes a lead-free/RoHS-compliant package.

* The top mark includes a "+" on lead-free packages.

DETAILED DESCRIPTION

The DS2119M 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 DS2119M will use LVD termination. If any SE devices are connected

to the bus, the DS2119M 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 DS2119M integrates two current sources with nine precision resistor

strings. For the SE termination, one regulator and nine precision 110Ω resistors are used. Three

DS2119M terminators are needed for a wide SCSI bus.

www.maxim-ic.com

DS2119ME

DS2119ME+

DS2119ME/T&R

DS2119ME+T&R

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 of 3pF

On-Board Thermal Shutdown Circuitry

SCSI Bus Hot Plug Compatible

Fully Supports Actively Negated SE SCSI

Signals

PART

VOLTAGE

(V)

TEMP RANGE PIN-PACKAGE

0°C to +70°C

Ultra3 LVD/SE SCSI Terminator

1 of 9

28 TSSOP (0.173")

28 TSSOP (0.173")/Tape

and Reel

28 TSSOP (0.173")/Tape

and Reel

PIN CONFIGURATION

HS GND

VREF

GND

R3N

R2N

R3P

R4N

R5N

R2P

R4P

R5P

ISO

RIP

RIN

DS2119M

TSSOP

TOP MARK*

DS2119M

R9N

R9P

R8N

R8P

R7N

HS GND

R7P

R6N

R6P

DIFF_CAP

DIFFSENSE

MSTR/SLV

TPWR

REV: 010406

Related parts for DS2119ME+T&R/C13

DS2119ME+T&R/C13 Summary of contents

Page 1

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 ...

Page 2

REFERENCE DOCUMENTS Small Computer Systems Interface (SCSI-3) SCSI Parallel Interface (SPI) Small Computer Systems Interface (SCSI-3) SCSI Parallel Interface 2 (SPI-2) Project: 1142-M, 1998 Small Computer Systems Interface (SCSI-3) SCSI Parallel Interface 3 (SPI-3) Project: 1302-D, 1999 Small Computer Systems ...

Page 3

DS2119M. The DS2119M should be placed as close as possible to the SCSI connector to minimize signal and power-trace length, thereby resulting in less input capacitance and reflections, which can degrade the bus signals. To maintain ...

Page 4

Figure 1. DS2119M Block Diagram ...

Page 5

Figure 2. SCSI Bus Configuration ...

Page 6

PIN DESCRIPTION PIN NAME 1 VREF 2–5, 7–12, RxP, 18–21, 23–26 RxN GND 13 ISO 14 GND 15 MSTR/SLV 16 DIFFSENSE DIFFSENSE. Output to drive the SCSI bus DIFFSENS line. 17 DIFF_CAP 27, 28 TPWR RECOMMENDED OPERATING ...

Page 7

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 ...

Page 8

REGULATOR CHARACTERISTICS (T = 0°C to +70°C) A PARAMETER Line Regulation Load Regulation Current Limit Sink Current NOTES 3V. LINE 0.2V. LINE 3) Guaranteed by design. 4) All lines open ...

Page 9

... The Maxim logo is a registered trademark of Maxim Integrated Products, Inc. The Dallas logo is a registered trademark of Dallas Semiconductor Corporation. ...

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