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G219T-D3 Schematic ( PDF Datasheet ) - ETC

Teilenummer G219T-D3
Beschreibung Ultra320 Multi-mode LVD/SE SCSI Terminator
Hersteller ETC
Logo ETC Logo 




Gesamt 9 Seiten
G219T-D3 Datasheet, Funktion
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
R3+
R3-
R4+
6
7
8
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: 886-3-5788833
http://www.gmt.com.tw
1






G219T-D3 Datasheet, Funktion
Global Mixed-mode Technology Inc.
Typical Operating Characteristics
G219
Common Mode Bias Vcm - Vtpwr
1.375
1.325
T=80ºC
1.275
1.225
1.175
T=-10ºC
1.125
2.5
3.5 4.5
Vtpwr
5.5
1.375
1.325
Common Mode Bias Vcm -
Temperature
Vtpwr=5.8V
1.275
1.225
1.175
Vtpwr=2.8V
1.125
-20 0
20 40 60 80 100
Temperature(ºC)
Differential Mode Bias Vdm - Vtpwr
0.125
0.12
0.115
T=-10ºC
0.11
0.105
T=80ºC
0.1
2.5
3.5 4.5
Vtpwr
5.5
0.125
Differential Mode Bias Vdm -
Temperature@Vtpwr=5V
0.12
0.115
0.11
0.105
0.1
-20 0 20 40 60 80 100
Temperature(ºC)
Common Mode Termination Resistance
Rcm - Vtpwr @Temperature=24ºC
190
180
170
160
150
140
130
120
110
2.5 3.5 4.5 5.5
Vtpwr
Common Mode Termination Resistance
Rcm - Temperature@Vtpwr=5V
190
180
170
160
150
140
130
120
110
-20 0 20 40 60 80 100
Temperature(ºC)
Differential Mode Termination
Resistance Rdm - Vtpwr
110
109
108
107
106
105
104
103
102
101
100
2.5
T=80ºC
T=-10ºC
3.5 4.5
Vtpwr
5.5
Ver 1.2
Feb 08, 2002
Differential Mode Termination
Resistance Rdm - Temperature
110
Vtpwr=2.8V
108
106
104
Vtpwr=5.8V
102
100
-20 0 20 40 60 80 100
Temperature(ºC)
TEL: 886-3-5788833
http://www.gmt.com.tw
6

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