G219 Datasheet, PDF (1/9 Pages) List of Unclassifed Manufacturers – Ultra320 Multi-mode LVD/SE SCSI Terminator

Global Mixed-mode Technology Inc.
G219
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 package
„28 Pin TSSOP: Pin Compatible with DS2119
Applications
„Server and workstation
„High-end PC
„Industrial PC
„Disk Array (RAID)
„SCSI cable
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.
Pin Configuration
VREF 1
R1+ 2
R1- 3
R2+ ⁴
R2- 5
NC/ HS GND 6
R3+ ₇
R3- ₈
R4+ ₉
R4- 10
R5+ 11
R5- ¹²
DISCNCT 13
GND 14
G219
28 TPWR
27 _TPWR
26 R9-
25 R9+
24 R8-
23 R8+
22 ^{NC/ HS GND}
21 R7-
20 _R7+
19 R6-
18 R6+
17 ^DIFFB
16 DIFFSENSE
15 M/S
28Pin TSSOP
Ver 1.2
Feb 08, 2002
TEL: [phone]
http://www.gmt.com.tw
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