3

UCC5630

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNITS

2.7V Regulator

Single Ended Mode

2.5

2.7

3

V

2.7V Regulator Source Current

Single Ended Mode

–200

–400

–800

mA

2.7V Regulator Sink Current

Single Ended Mode

100

200

400

mA

2.7V Regulator Dropout Voltage

200

mV

Differential Termination Section

Differential Impedance

100

105

110

Ω

Common Mode Impedance

110

125

165

Ω

Differential Bias Voltage

Drivers Tri-stated

100

125

mV

Common Mode Bias

1.25

V

Output Capacitance

Single Ended Measurement to Ground (Note 1)

3.5

pF

Single Ended Termination Section

Impedance

102.3

110

117.7

Ω

Termination Current

Signal Level 0.2V

–21

–23

–25.4

mA

Signal Level 0.5V

–22.4

mA

Output Leakage

Disabled, TRMPWR = 0V to 5.25V

400

nA

Output Capacitance

Single Ended Measurement to Ground (Note 1)

3

pF

Single Ended GND SW Impedance

60

Ω

Disconnect (DISCNCT) Input Section

DISCNCT Threshold

0.8

2.0

V

DISCNCT Input Current

–30

30

µA

Differential Sense (DIFFB) Input Sections

DIFFB Single Ended Threshold

0.6

0.7

V

DIFFB Sense LVDS Threshold

1.9

2.2

V

DIFFB Input Current

–30

30

µA

Master/Slave (MSTR/SLV) Input Section

MSTR/SLV Threshold

0.8

2

V

MSTR/SLV Input Current

–30

30

µA

Status Bits (SE, LVD, HIPD) Output Section

–4

–8.7

mA

3

6

mA

2

5

mA

Note 1: Guaranteed by design. Not 100% tested in production.

PIN DESCRIPTIONS

DIFFB: DIFSENS filter pin should be connected to a

0.1

µF capacitor to GND and 20k resistor to SCSI/Bus

DIFSENS Line.

DIFSENS: The SCSI bus DIFSENS line is driven to 1.3V

to detect what type of devices are connected to the SCSI

bus.

DISCNCT: Disconnect shuts down the terminator when it

is not at the ended of the bus. The disconnect pin low en-

ables the terminator.

HIPD: TTL compatible status bit indicating high voltage

differential has been detected on DIFFB. The terminator

is in shutdown. (Not valid in disconnect mode.)

HS/GND: Heat Sink GND. Connect to large area PC

board traces to increase power dissipation capability.

GND: Power Supply Return.

L1– thru L9–: Signal line/active line for single ended or

negative line in differential applications for the SCSI bus.

L1+ thru L9+: Ground line for single ended or positive

line for differential applications for the SCSI bus.

LVD: TTL compatible status bit indicating low voltage dif-

ferential level on DIFFB. The terminator is in LVD

mode.(Not valid in disconnect mode.)