DS2125SLASHT&R datasheet(2/7 Pages) MAXIM

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DS2125 Ultra3 LVD/SE SCSI 15-Line Terminator

2 of 7

ABSOLUTE MAXIMUM RATINGS

VREF, ISO, GND, DIFFSENSE, DIFF_CAP, TPWR, RxP, RxN (x = 1 . . . 15)………………………………-0.3V, +6.0V

VREF Continuous Output Current………………………………………………………………………………………±200mA

Continuous Power Dissipation (TA = +70°C), 48-Pin LQFP……………………………………………………………...2W

Operating Temperature Range………………………………………………………………………………….0°C to +70°C

Junction Temperature…………………………………………………………………………………………………...+150°C

Storage Temperature Range………………………………………………………………………………...-65°C to +160°C

Lead Temperature (soldering, 10s)…………………………………………………………………………………….+300°C

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only,

and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is

not implied. Exposure to the absolute maximum rating conditions for extended periods may affect device reliability.

ELECTRICAL CHARACTERISTICS

(TPWR = 3.3V, TA = 0°C to +70°C, unless otherwise noted.)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

LVD

2.7

5.5

TPWR Operating Supply

Range

VTPWR

4.0

5.5

TPWR SUPPLY CURRENT

ITPWR_LVD

LVD SCSI mode

ITPWR_SE

SE SCSI mode

1.6

TPWR Supply Current

(All Lines Open)

ITPWR_ISO

ISO mode (terminators disabled)

250

750

µA

LVD TERMINATION (Applies to each line pair, 1 to 15 in LVD mode)

Differential-Mode

Termination Resistance

RDM

100

110

Ω

Common-Mode

Termination Resistance

RCM

RP and RN shorted together

110

165

Ω

Differential-Mode Bias

VDM

All lines open

100

125

Common-Mode Bias

VCM

RP and RN shorted together

1.15

1.25

1.35

SE TERMINATION (Applies to SE terminators, 1 to 15 in SE mode)

Single-Ended Mode

Termination Resistance

RSE

RSE = (VLx - 0.2) / ILx,

where VLx = voltage at terminator

pin with pin unloaded and

ILx = current for each terminator pin

with the pin forced to 0.2V (Note 2)

104.5

110

115.5

Ω

Signal level at 0.2V, all lines low

-21.0

-24

-25.4

Termination Current

(Note 2)

ISE

Signal level at 0.5V

-18.0

-22.4

SE Voltage Reference

VREF

(Note 2)

2.7

2.85

3.0

Pin Leakage

With ISO high

400

Single-Ended GND

Resistance

RGND

Measured at RP pins, I = 10mA

Ω

TERMINATOR PIN CAPACITANCE

Terminator Pin

Capacitance

CIN

With ISO high (Note 1)

VREF REGULATOR

1.25V Regulator Output

Voltage

VREF_LVD

1.15

1.25

1.35

1.25V Regulator Short-

Circuit Source Current

ISOURCE

VREF = 0V

-375

-700

-1000

1.25V Regulator Short-

Circuit Sink Current

ISINK

VREF = 3.3V

170

300

700

1.25V Regulator Line

Regulation

VREF unloaded; vary TPWR from

2.7V to 5.5V

1.0

2.5

2.85V Regulator

(Note 2)

2.7

2.85

3.0

2.85V Regulator Short-

Circuit Source Current

VREF = 0V (Note 2)

-375

-700

-1000

2.85V Regulator Short-

Circuit Sink Current

VREF = 3.3V (Note 2)

170

300

700

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