Global Mixed-mode Technology Inc.
Low Voltage Differential (LVD) SCSI 27 Line Regu-
lator Set
Features
SCSI SPI-2 (Ultra 2), SPI-3 (Ultra 3/Ultra 160)
and SPI-4 (Ultra 320) LVD SCSI, 27 Line Low
Voltage Differential Regulator
4V to 5.25V Operation
Integrated Regulator Set for LVD SCSI
Differential Failsafe Bias
G261
Description
The G261 LVD Regulator set is designed to provide
the correct reference voltages and bias currents for
LVD termination resistor networks (475Ω, 121Ω, and
475Ω). The device also provides a 1.3V output for
DIFFSENSE signaling. With the proper resistor net-
work, the G261 solution will meet the common mode
impedance, differential mode impedance, differential
bias voltage and common mode voltage requirements
of SPI-2 (Ultra2), SPI-3 (Ultra 3/Ultra 160) and SPI-4
(Ultra 320).
This device contains two sink / source reference volt-
age regulators, a 1.3V buffered output and protection
features. The protection features include thermal
shutdown and active current limiting circuitry. The
G261 is offered in 8 pin SOP and 16pin SOP.
Applications
SCSI cable
SCSI card
Disk Array
Industrial PC
POS
Ordering Information
ORDER ORDER NUMBER TEMP.
NUMBER
(Pb free)
RANGE
G261P1U
G261P3U
G261P1Uf
G261P3Uf
0°C~70°C
0°C~70°C
PACKAGE
SOP-8
SOP-16
Pin Configuration
G261
NC
REG2
HSPGND
HSPGND
REG1
1
8
1
2
3
4
5
6
7
8
G261
16
15
14
13
12
11
10
9
NC
NC
NC
HSGND
HSGND
NC
NC
NC
TERMPWR
HSGND
HSGND
DIFFSENSE
TERMPWR
REG2
HSPGND
HSGND
REG1
DIFFSENSE
NC
2
7
3
6
4
5
SOP-8
SOP-16
Ver 3.2
Dec 13, 2004
TEL: 886-3-5788833
http://www.gmt.com.tw
1
GMT [ GLOBAL MIXED-MODE TECHNOLOGY INC ]
