UCC5696

SLVS406B – JUNE 2002 – REVISED JUNE 2003

5

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Terminal Functions

TERMINAL

FUNCTION

NAME

NO.

I/O

FUNCTION

DIFSENS

15

O

The SCSI bus DIFF SENSE line detects what types of devices are connected to the SCSI bus.

DISCNT

52

I

The disconnect pin shuts down the terminator when it is not at the end of the bus. The disconnect pin low en-

ables the terminator.

DIFFB

16

I

Senses the bus mode, a 50-Hz filter is required, 0.1

µF to ground and 20 kΩ to the SCSI bus DIFF SENSE line

with internal SPI-3 100-ms to 310-ms delay.

HVD

14

O

A high-voltage differential voltage level has been detected on the DIFF B pin. HVD pin high indicates that the

terminator is in high impedance mode.

ICBD

50

I/O

I2C bus data. Serial control for impedance and bias current adjustments.

ICBC

51

I

I2C bus clock.

ICAD0–6

I

I2C address.

Line n–

O

Negative line for differential applications of the SCSI bus.

Line n+

O

Positive line for differential applications of the SCSI bus.

LVD

13

O

A low-voltage differential voltage level has been detected on the DIFF B pin. LVD pin high indicates that the ter-

minator is in LVD mode.

PVDD

8

I

Power supply for the regulator. PVDD should be tied to TERMPWR pin.

REG

10

O

Regulator bypass pin must be bypassed to ground with a 4.7-

µF low ESR capacitor.

SE

12

O

A single ended voltage level has been detected on the DIFF B pin. SE pin high indicates that the terminator is in

high impedance mode.

TERMPWR

7

I

VIN 2.7-V to 5.25-V supply. TERMPWR should be bypassed to ground with a 4.7-µF low ESR capacitor.