HP7501
Ultra320 LVD/SE SCSI Terminator
2003/05/12 Ver. 0.0
1
HIMARK TECHNOLOGY INC.
FEATURES
Fully compliant with Ultra320 (SPI-4),
Ultra3/Ultra160 (SPI-3), Ultra2/Fast-40 (SPI-2)
and Ultra/Fast-20 Standards.
Auto Selection Multi-Mode SE or LVD
Termination for 9 signal line pairs.
Built-in SPI-4 Mode Change Filter
2.7V to 5.25V Operation
Built in Current Limit and Thermal shutdown
Protection Circuitry.
Support Master/Slave input.
SCSI bus hot plug compatible.
Support active negation drive.
28 and 36 pin package.
DESCRIPTION
The HP7501 is a multi-mode SCSI terminator that
conforms to the SCSI (SPI-4) specification which is
designed for the low voltage differential (LVD)
termination. The HP7501 provides backward
c om patibility to the SCSI-2, SCSI-1 and a
Single-Ended specifications.
Multi-mode function set up the use of legacy devices
on the bus without changing any hardware setting.
Automatic selection is made by voltage detection on
the DIFFSEN line. If the device is connected in an
LVD only bus, the HP7501 will use LVD termination. If
the device is connected in a Single Ended mode, the
HP 7501 will c onnec t in a S E t e rm ination.
HiMARK’s SCSI termination architecture uses high
speed elements for the design, therefore providing the
fast response time.
PACKAGE PINOUT
VREF
NC
R1P
NC
R1N
R2P
HGND
R2N
HGND
HGND
R3N
R3P
R4P
R4N
R5N
R5P
ISO
GND
1
2
4
3
5
6
8
7
9
10
12
11
36
35
33
34
32
31
29
30
28
27
25
26
13
14
16
15
17
18
24
23
21
22
20
19
HP7501-A36
TPWR
HVD
SE
LVD
R9N
R9P
R8P
R8N
HGND
HGND
R7N
HGND
R7P
R6N
DIF_CAP
R6P
DIFFSENSE
MST/SLV
VREF
R1P
R2P
R1N
R2N
HGND
R3N
R3P
R4P
R4N
R5N
R5P
ISO
GND
1
2
4
3
5
6
8
7
9
10
12
11
28
27
25
26
24
23
21
22
20
19
17
18
13
14
16
15
HP7501-T28
TPWR
TPWR
R9P
R9N
R8N
R8P
R7N
HGND
R7P
R6N
DIF_CAP
R6P
DIFFSENSE
MST/SLV
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