SS7500 Datasheet, PDF (1/5 Pages) Silicon Standard Corp. – Multi-mode SCSI Terminator

SS7500
Multi-mode SCSI Terminator
FEATURES
PACKAGE PIN OUT
!" Fully compliant with Ultra160/m SCSI,
Ultra2 and Ultra3 standards.
!" Auto-selection Multi-Mode SE or LVD
termination for 9 signal line pairs.
!" 5 V operation
!" Built in thermal shutdown circuitry
!" Supports Master/Slave input.
!" SCSI bus hot-plug compatible.
!" Supports active-negation drive.
DESCRIPTION
The SS7500 is a multimode SCSI
terminator that conforms to the SCSI (SP2)
specification which is designed for low
voltage differential (LVD) termination.
The SS7500 provides backward compatibility
to the SCSI and SCSI-2 specifications.
Multimode function sets up the use of legacy
devices on the bus without changing any
hardware setting. Automatic selection is
made by voltage detection on the diffsense
line. If the device is connected to an
LVD-only bus, the SS7500 will use LVD
termination. If the device is connected in a
Single Ended mode, the SS7500 will be
connected in a SE termination. The SCSI
termination architecture uses high speed
elements for the design, therefore providing
fast response time.
VREF
NC
NC
R1P
R1N
R2P
R2N
HGND
HGND
HGND
R3P
R3N
R4P
R4N
R5P
R5N
ISO
GND
1
36
2
35
3
34
4
33
5
32
6
31
7
30
8
29
9
28
10
27
11
26
12
25
13
24
14
23
15
22
16
21
17
20
18
19
SS7500
TPWR
HVD
LVD
SE
R9N
R9P
R8N
R8P
HGND
HGND
HGND
R7N
R7P
R6N
R6P
DIF_CAP
DIFFSEN
MST/SLV
Rev.2.01 6/06/2003
www.SiliconStandard.com
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