SiP5668

Vishay Siliconix

New Product

Document Number: 73099

S-41843—Rev. A, 11-Oct-04

www.vishay.com

5

PIN CONFIGURATION AND ORDERING INFORMATION

54

21

3

6

12

10

8 7

9

11

3233

3536

34

31

25

27

2930

28

26

48

47

46

45

44

43

42

41

40

39

38

37

13

14

15

16

17

18

19

20

21

22

23

24

SiP5668 (SQFP-48)

Top View

T14N

T14P

T13N

T13P

T12N

T12P

T11N

T11P

T10N

T10P

T9N

T9P

T5N

T3P

T3N

T4P

T4N

T5P

T8N

T6P

T6N

T7P

T7N

T8P

ORDERING INFORMATION

Part Number

Temperature Range

Marking

SiP5668CS-TR—E3

0 to 70_C

SiP5668CS

PIN DESCRIPTION

Pin

Name

Function

1, 11, 13, 15, 17,

19, 21, 23, 25, 37,

39, 41, 43, 45, 47

TXP; X = 1...14

Positive terminator channel pins. Provide positive signal line termination in LVD operation, and are connected to GND

through low impedance in S/E operation. In HPD, DISABLE, or power off condition these pins present high

impedance to the SCSI bus.

2, 12, 14, 16, 18,

20, 22, 24,26, 38,

40, 42, 44, 46, 48

TXN; X = 1...14

Negative terminator channel pins. Provide negative signal line termination in LVD operation, and line termination for

S/E operation. In HPD, DISABLE, or power off condition these pins present high impedance to the SCSI bus.

3

TERMPWR

Power for the terminator IC. Connect to the TERMPWR lines on the SCSI bus and decouple with a 4.7-mF capacitor

to GND at the IC.

4, 5, 6, 7, 8, 9, 28,

29, 30, 31, 32, 33

H/S GND

Heat sink ground. Should be connected to as large a grounded heat sink area on the PC board as is practical.

10

REG

SCSI regulator output. Connect a 4.7-mF bypass capacitor from this pin to GND.

25

GND

Electrical ground connection for the terminator IC. Connect to the ground lines of the SCSI Bus

26, 27

S/E, LVD

Status output pins. Respective pins are high when the terminator detects the corresponding mode of operation on the

SCSI bus, and low otherwise.

34

MODE

SCSI MODE select pin. Connect to the DIFFSENS line of the SCSI bus to sense the present mode of operation on

the bus. An internal time delay filter is provided but it is recommended to decouple MODE from the DIFFSENS signal

with a 20-kW/0.1-mF anti-aliasing filter for reliable operation in noisy environments.

35

DIFFS

DIFFSENS regulator output. Connect to the DIFFSENS line of the SCSI bus to bias the mode selection function.

36

DISABLE

Chip disable. There is a small (nominal 10 mA) pull up current on this pin. Pull this pin to GND to enable bus

termination. When this pin is left floating or pulled high all SCSI channel pins present high impedance to the SCSI bus,

and the SCSI regulator and DIFFSENS regulator are both disabled.