Global Mixed-mode Technology Inc.
Features
Auto-selectable multi-mode Single-Ended
or LVD Termination
Meets SCSI-1, SCSI-2, SCSI-3 SPI Ultra
(Fast-20), Ultra 2(SPI-2 LVD), Ultra160 (SPI-3
LVD), and Ultra320 (SPI-4 LVD) standards
Supports active negation
3pF channel capacitance
2.9V to 5.5V operation
Thermal protection
Hot-Swap compatible
5% tolerance on SE and LVD termination
resistance
SE/LVD mode indicators
28 pin TSSOP package
Ultra320 Multi-mode LVD/SE SCSI Terminator
General Description
G220
The G220 Multi-mode LVD/SE SCSI terminator pro-
vides a smooth transition into the next generation of
the SCSI Parallel Interface (SPI-4). It automatically
senses the bus, via DIFFSENS, and switches the ter-
mination to either single-ended (SE) or low voltage
differential (LVD) SCSI, dependent on which type of
devices are connected to the bus. If the G220 detects
a HVD SCSI device, it switches to a high impedance
state. For a 16-bit Wide SCSI bus to be operational,
three G220 terminators are needed.
The Multi-mode terminator contains all functions re-
quired to terminate and auto detect and switch modes
for SCSI Parallel Interface (SPI) bus architectures. For
the SE termination, one regulator and nine precision
110ohm resistors are used. For the LVD termination,
the G220 integrates 18 regulated supplies with nine
precision resistor strings.
Applications
Server and workstation
High-end PC
Industrial PC
Disk Array (RAID)
SCSI cable
Ordering Information
ORDER
NUMBER
G220D3X
MARKING
G220
TEMP.
RANGE
0°C to +70°C
PACKAGE
TSSOP-28L
Note: X Specify the packing type
U: Tape & Reel
T: Tube
Pin Configuration
G220
VREF
R1+
R1-
R2+
R2-
NC/ HS GND
R3+
R3-
R4+
R4-
R5+
R5-
DISCNCT
1
2
3
4
5
6
7
8
9
10
11
12
13
28
27
26
25
24
23
22
21
20
19
18
17
16
15
TPWR
LVD
SE
R9-
R9+
R8-
R8+
R7-
R7+
R6-
R6+
DIFFB
DIFFSENSE
M/S
GND 14
TSSOP-28L
Ver: 0.1 Preliminary
Apr 03, 2003
TEL: 886-3-5788833
http://www.gmt.com.tw
1
GMT [ GLOBAL MIXED-MODE TECHNOLOGY INC ]
