Rainbow-electronics DS2127 Bedienungsanleitung PDF herunterladen (Seite 3)

DS2127

Ultra3 LVD/SE SCSI 14-Line Terminator

_____________________________________________________________________ 3

Note 1: All voltages are referenced to ground.

Note 2: Guaranteed by design and not production tested.

ELECTRICAL CHARACTERISTICS (continued)

(TPWR = V

TPWR(MIN)

to V

TPWR(MAX)

, T

= 0°C to +70°C, unless otherwise noted.)

PARAMETER

SYMBOL

CONDITIONS MIN

TYP MAX

UNITS

REF

REGULATOR

1.25V Regulator Line Regulation

REF

unloaded; vary TPWR from

2.7V to 5.5V

1.0

2.5

2.85V Regulator 2.7

2.85 3.0

2.85V Regulator Short-Circuit

Source Current

REF

= 0V

-375 -700 -1000

2.85V Regulator Short-Circuit

Sink Current

REF

= 3.3V 170 300

700

2.85V Regulator Line Regulation

REF

unloaded; vary TPWR from

2.7V to 5.5V

1.0

2.5

DIFFSENS OUTPUT

DIFFSENS Driver Output Voltage

DSO

-5mA ≤ I

DIFFSENS

≤ 50µA 1.2

1.4

DIFFSENS Driver Source Current

DSH

DIFFSENS

= 0V -15 -5 mA

DIFFSENS Driver Sink Current I

DSL

DIFFSENS

= 2.75V 100

200

µA

LEAK,

LOW

With ISO high, |V

DIFFSENS

| = 0.3V -3 +1

DIFFSENS Leakage

LEAK,

HIGH

With ISO high, |V

DIFFSENS

- V

TPWR

| = 0.3V 1 3

µA

THERMAL SHUTDOWN

Thermal-Shutdown Threshold For increasing temperature 130 °C

Thermal-Shutdown Hysteresis 10 °C

MODE CHANGE DELAY/FILTER

Mode Change Delay t

DELAY

0.66 1.25 2.00

LOGICAL SIGNALS (ISO)

Input Low Voltage V

-0.3

+0.8

Input High Voltage V

2.0

TPWR + 0.3

Input Current I

= 3.3V -30 -10 µA

STATUS BITS (LVD, SE)

Source Current I

= 3.3V, V

LOAD

= 2.4V -4 -6 mA

Sink Current I

= 3.3V, V

LOAD

= 0.4V 2 5 mA

DIFF_CAP

Input Current IL V

= -0.3V -1 +1 µA

DIFF_CAP SE Operating Range V

SEOR

-0.3

+0.5

DIFF_CAP LVD Operating Range

LVDOR

0.7 1.9 V

DIFF_CAP HVD Operating Range

HVDOR

2.4

TPWR

+ 0.3

1 2 3 4 5 6

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