n Overview
The AN8612NSR is a terminator IC complying with the stan-
dard interface standards[SCSI-I/II] for personal computer,
work station and various information equipment. Fixed resistor
and regulator which are separately provided in conventional
ICs are incorporated in single chip for the AN8612NSR. The
stand-by function is also built in the AN8612NSR. Moreover,
this IC can easily satisfy the maximum terminal capacitance of
25 pF of the SCSI-II standard, because of its small output ter-
minal capacitance. It can support the 10 M byte/s of SCSI-II
and 20 M bytes/s of Fast-20.
n Features
• Active termination of 18 signal lines
• Low consumption power owing to stand-by function built-in
(100µA in stand-by condition)
• Small output terminal capacitance : 4.5 pF, typ.
• High accuracy regulator : 2.85V±60mV
n Application
SCSI interface board of PC
SCSI equipment such as CD-ROM, MO, PD and MD printer
AN8612NSR
SCSI Active Terminator IC
8.4– 0.3
11.73– 0.3
0.5
0.1
–
0.1
(0075)
3.15
–
0.2
1.45
(7.8)
(9.2)
1.27
0.4
–
0.25
(6.0)
(4.6)
16.0
–
0.3
Unit : mm
1.45
1
2
4
5
6
7
8
9
11
12
3
10
24
23
22
21
20
19
18
17
16
15
14
13
Number in ( ) is a reference value.
24-pin SOP Package (HSOP024-P-0450)
(0.2)
18
17
16
15
14
11
10
9
8
7
5
4
3
2
23
22
21
20
1
12
13
24
6 19
+
–
Thermal
Shut Down
Band Gap
Reference
V
CC
STANDBY
0.1µF 1µF
SG LINE 1
SG LINE 2
SG LINE 3
SG LINE 4
SG LINE 5
SG LINE 6
SG LINE 7
SG LINE 8
SG LINE 9
SG LINE 10
SG LINE 11
SG LINE 12
SG LINE 13
SG LINE 14
SG LINE 15
SG LINE 16
SG LINE 17
SG LINE 18
+
n Block Diagram