sip5638 Vishay, sip5638 Datasheet - Page 5

• Manufacturer Part Number: sip5638
• Description: Sip5638 - 15-line Scsi Bus Terminators
• Manufacturer: Vishay

Document Number: 73098
S-41843—Rev.A, 11-Oct-04
PIN CONFIGURATION AND ORDERING INFORMATION
PIN DESCRIPTION
19, 21, 23, 25, 37,
4, 5, 6, 7, 8, 9, 28,
39, 41, 43, 45, 47
20, 22, 24,26, 38,
40, 42, 44, 46, 48
29, 30, 31, 32, 33
2, 12, 14, 16, 18,
1, 11, 13, 15, 17,
Pin
10
27
34
35
36
3
TXP; X = 1...15
TXN; X = 1...15
TERMPWR
H/S GND
DISABLE
Name
MODE
DIFFS
GND
REG
T3N
T4N
T5N
T6N
T7N
T8N
T3P
T4P
T5P
T6P
T7P
T8P
SiP5638CS-TR—E3
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.
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.
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.
Heat sink ground. Should be connected to as large a grounded heat sink area on the PC board as is practical.
SCSI regulator output. Connect a 4.7-mF bypass capacitor from this pin to GND.
Electrical ground connection for the terminator IC. Connect to the ground lines of the SCSI Bus
SCSI MODE select pin. Connect to the DIFFSENS line of the SCSI bus to sense the present mode of operation on
the bus. Decouple MODE from the DIFFSENS signal with a 50-kW/4.7-mF low pass filter to meet SPI-3 mode change
requirements.
DIFFSENS regulator output. Connect to the DIFFSENS line of the SCSI bus to bias the mode selection function.
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.
Part Number
13
14
15
16
17
18
19
20
21
22
23
24
12
25
ORDERING INFORMATION
11
26
10
27
SiP5638 (SQFP-48)
28
Temperature Range
9
New Product
29 30
8 7
Top View
0 to 70_C
31
6
32 33
5 4
34
3
35 36
2 1
Function
48
47
46
45
44
43
42
41
40
39
38
37
SiP5638CS
Marking
T15N
T15P
T14N
T14P
T13N
T13P
T12N
T12P
T11N
T11P
T10N
T10P
Vishay Siliconix
SiP5638
www.vishay.com
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