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SS7500

PIN DESCRIPTION

PIN

SYMBOL

DESCRIPTION

36

TPWR

Vin 5V supply. Connect to SCSI bus power line.

1

VREF

Reference Voltage. Must be decoupled with a 4.7uF as shown in

Figure 1.

2,3

NC

Do not connect any signal to this pin.

8,9,10

26,27,28

HGND

Heat Sink Ground. Connect to large area PC board ground trace

in order to increase power dissipation.

4,6,11

13,15,22

24,29,31

RxP

Signal Terminator. Line for single ended or positive line for

differential mode.

5,7,12

14,16,23

25,30,32

RxN

Single Terminator. Line for single ended or negative line for

differential mode.

17

ISO

Shuts down the terminator when pull high.

18

GND

Signal Ground.

19

MST/SLV

Mode select pin. Master mode will enable the DIFFSEN drive

SCSI bus if this signal ties high.

20

DIFFSEN

This signal will drive 1.3V to the SCSI bus during the Master

mode in order to detect which type of device is connected to the

SCSI bus.

21

DIF_CAP

This pin should be connected to a 0.1uF capacitor to ground and

20K resistor to SCSI bus DIFFSEN line for DIFFSEN filter.

33

SE

Single ended. Indicates SE device is on the SCSI bus when this

pin is active.

34

LVD

Low Voltage Differential. Indicates the terminator is in LVD

operation.

35

HVD

High Voltage Differential. Indicates the HVD device is detected

and terminator is in shut down mode.

Rev.2.01 6/06/2003