Global Mixed-mode Technology Inc.
Ultra320 Multi-mode LVD/SE SCSI Terminator
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
28 pin TSSOP & 36 pin SSOP package
28 Pin TSSOP: Pin Compatible with DS2119,
UCC5672
36 Pin SSOP: Pin Compatible with DS2118,
LX5241, UCC5630 and UCC5672
G219
General Description
The G219 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 G219 detects
a HVD SCSI device, it switches to a high impedance
state. For a 16-bit Wide SCSI bus to be operational,
three G219 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 G219 integrates 18 regulated supplies with nine
precision resistor strings.
Applications
Server and workstation
High-end PC
Industrial PC
Disk Array (RAID)
SCSI cable
Pin Configuration
G219
VREF
R1+
R1-
R2+
R2-
NC/ HS GND
R3+
R3-
R4+
R4-
R5+
R5-
DISCNCT
GND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
TPWR
TPWR
R9-
R9+
R8-
R8+
NC/ HS GND
R7-
R7+
R6-
R6+
DIFFB
DIFFSENSE
M/S
G219
VREF
NC
NC
R1+
R1-
R2+
R2-
HS/GND
HS/GND
HS/GND
R3+
R3-
R4+
R4-
R5+
R5-
DISCNCT
GND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
TPWR
HVD
LVD
SE
R9-
R9+
R8-
R8+
HS/GND
HS/GND
HS/GND
R7-
R7+
R6-
R6+
DIFFB
DIFFSENSE
M/S
28Pin TSSOP
36Pin SSOP
Ver: 1.3
Jul 19, 2002
TEL: 886-3-5788833
http://www.gmt.com.tw
1
GMT [ GLOBAL MIXED-MODE TECHNOLOGY INC ]
