G219R-S5F [GMT]
Bus Terminator, PDSO36;
| 型号： | G219R-S5F |
| 厂家： | 
GLOBAL MIXED-MODE TECHNOLOGY INC |
| 描述： | Bus Terminator, PDSO36 光电二极管 |
| 文件： | 总10页 (文件大小：267K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Global Mixed-mode Technology Inc.
G219
Ultra320 Multi-mode LVD/SE SCSI Terminator
Features
General Description
Auto-selectable multi-mode Single-Ended
or LVD Termination
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.
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
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.
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
Applications
Server and workstation
High-end PC
Industrial PC
Disk Array (RAID)
SCSI cable
Pin Configuration
G219
G219
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
1
2
3
4
5
TPWR
HVD
VREF
NC
28
27
26
25
24
23
22
VREF
R1+
1
2
TPWR
TPWR
R9-
LVD
NC
R1-
3
R1+
R1-
SE
4
R9+
R2+
R2-
R9-
R9+
R8-
5
R8-
6
7
R2+
R2-
R8+
NC/ HS GND
R3+
6
NC/ HS GND
7
HS/GND
HS/GND
8
9
R8+
HS/GND
R3-
21 R7-
8
R4+
20
9
R7+
10
11
12
HS/GND
HS/GND
R7-
HS/GND
R3+
R4-
R5+
19 R6-
10
11
12
R6+
18
17
R3-
DIFFB
R5-
R4+ 13
R7+
13
14
16 DIFFSENSE
15
DISCNCT
14
R4-
R6-
15
M/S
R5+
R6+
GND
21 DIFFB
16
17
R5-
DISCNCT
GND
TSSOP-28
20
19
DIFFSENSE
M/S
18
SSOP-36
Ver: 1.4
Nov 05, 2004
TEL: 886-3-5788833
http://www.gmt.com.tw
1
Global Mixed-mode Technology Inc.
Ordering Information
G219
ORDER
NUMBER
G219T-D3
G219R-D3
G219T-S5
G219R-S5
ORDER NUMBER
(Pb free)
TEMP.
RANGE
0ºC-70ºC
0ºC-70ºC
0ºC-70ºC
0ºC-70ºC
PACKAGE
TSSOP-28 / Tube
FEATURE
G219T-D3f
DISCNCT does not disable VREF
DISCNCT does not disable VREF
DISCNCT does not disable VREF
DISCNCT does not disable VREF
G219R-D3f
TSSOP-28 / Tape & Reel
SSOP-36 / Tube
G219T-S5f
G219R-S5f
SSOP-36 / Tape & Reel
Note:
DIFFSENS⎯Refers to the SCSI bus signal.
DIFFSENSE⎯Refers to the G219 pin name and internal circuitry relating to differential sensing.
DIFFB⎯Refers to the G219 pin name and internal circuitry relating to monitoring the DIFFSENS line.
pacitance and reflections which can degrade the bus
signals.
Functional Description
The G219 is used in multi-mode active termination
applications, where single ended (SE) and low voltage
differential (LVD) devices might coexist. The LVD ter-
mination section consists of 18 source/sink amplifiers
(VTOP, VBOT), biasing circuitry and nine precision
resistor strings (RTOP, RMID, RBOT). The SE termi-
nation section consists of a 2.85V source/sink regula-
tor with 9 precision 110ohm resistor. The DIFFSENSE
section consists of a 1.3V, 5mA driver and a sensing
circuit (Figure 1)
The DIFFSENSE pin can drive the SCSI DIFFSENS
line (when M/S is pulled high) to determine the SCSI
bus operating mode. The G219 switches to the termi-
nation mode that is appropriate for the bus based on
the value of the DIFFSENS voltage. These modes are:
LVD mode LVD termination is provided by a precision
resistor string with two amplifiers. This configuration
yields a 105Ω differential and 150Ω common mode
impedance. A fail safe bias of 112mV is maintained
when no drivers are connected to the SCSI bus.
DIFFSENS is used to identify which types of SCSI
devices are present on the bus. If the voltage on
DIFFSENS is between 0-0.5V the bus is single-ended;
if it is between 0.7-1.9V the bus is LVD; and if it is
greater than 2.4V, the bus is HVD.
SE mode When the external driver for a given signal
line turns off, the active terminator will pull that signal
line to 2.85 volts (quiescent state). When used with an
active negation driver, the power amp can sink 22mA
per line while keeping the voltage reference in regula-
tion. The terminating resistors maintain their 110Ω
value.
The G219 DIFFB pin monitors the DIFFSENS line to
determine the proper operating mode of the device.
HVD Isolation Mode The G219 identifies that there is
an HVD (high voltage differential) device on the SCSI
bus and isolates the termination pins from the bus.
To maintain the specified regulation, a 4.7µF capacitor
is required between the VREF pin and ground of each
G219. A high frequency cap (0.1µF ceramic recom-
mended) can also be placed on the VREF pin in ap-
plications that use fast rise/fall time drivers. A typical
SCSI bus configuration is shown in Figure2.
When DISCNCT is pulled high, the termination pins
are isolated from the SCSI bus, and VREF is
grounded. During thermal shutdown, the termination
pins are isolated from the SCSI bus and VREF is
grounded. The DIFFSENSE driver is shut down during
either of these two events.
An internal pull down resistor assures that the G219
will be terminating the bus if the DISCNCT pin is left
floating.
To ensure proper operation, the TPWR pin should be
connected to the SCSI bus TERMPWR line. As with all
analog circuitry, the TERMPWR lines should be by-
passed locally. A 2.2µF capacitor and a 0.01µF high
frequency capacitor is recommended between TPWR
and ground and placed as close as possible to the
G219. The G219 should be placed as close as possi-
ble to the SCSI connector to minimize signal and
power trace length, thereby resulting in less input ca-
DIFFSENS noise filtering
The G219 incorporates a internal digital filter to re-
move the noise signal on the DIFFSENS control line,
thereby eliminating erroneous switching between
modes. The external filter may be used in addition to
the internal digital filter.
Ver: 1.4
Nov 05, 2004
TEL: 886-3-5788833
http://www.gmt.com.tw
2
Global Mixed-mode Technology Inc.
G219
Block Diagram (Figure 1)
(
36pin SSOP only )
M/S DIFFSENSE
LVD
DISCNCT
SE
HVD
THERMAL
SHUTDOW N
CIRCUITRY
DIFFSENSE
CIRCUITRY
CONTROL
LOGIC
DIFFB
VREF
VREF
R1-
110 Ohms
R9-
110Ohms
REFERENCE
GENERATION
VTOP1
+
_
RTOP9
X 9
RTOP1
R1-
R1-
R9-
R9-
RMID1
RBOT1
RMID9
R1+
R1+
R9+
R9+
RBOT9
+
_
VBOT1
X 9
SE
GND
DRIV ER
Ver: 1.4
Nov 05, 2004
TEL: 886-3-5788833
http://www.gmt.com.tw
3
Global Mixed-mode Technology Inc.
G219
SCSI Bus Configuration (Figure 2)
CONTROL LINES (9)
TERMPWR
2.2µF
TERMPWR
2.2µF
TPWR
M/S
TPWR
M/S
DISCNCT
DISCNCT
G219
G219
DIFFSENS
DIFFSENSE
DIFFB
DIFFSENSE
DIFFB
VREF
VREF
20K
20K
0.1µF
4.7µF
0.1µF
4.7µF
DATA LINES (9)
TPWR
M/S
TPWR
M/S
2.2µF
2.2µF
DISCNCT
DISCNCT
G219
G219
DIFFB
VREF
VREF
DIFFB
4.7µF
4.7µF
DATA LINES (9)
TPWR
M/S
TPWR
M/S
2.2µF
2.2µF
DISCNCT
DISCNCT
G219
G219
DIFFB
VREF
VREF
DIFFB
4.7µF
4.7µF
Ver: 1.4
Nov 05, 2004
TEL: 886-3-5788833
http://www.gmt.com.tw
4
Global Mixed-mode Technology Inc.
Recommended Operating Conditions
G219
PARAMETER
SYMBOL
Vtpwr(SE)
Vtpwr(LVD)
Vil
MIN
4.0
2.9
-0.3
2.0
0
TYP
5
MAX
5.5
UNITS
Termpower Voltage
V
5
5.5
Logic 0
---
---
---
+0.8
Vtpwr+0.3
70
V
V
Logic 1
Vih
Operating Temperature
Tamb
°C
Electrical Characteristics
Unless otherwise specified, these specifications apply over the operating ambient temperature range of
0°C≤TA≤70°C.
PARAMETER
LVD Terminator Section
Differential Mode Termination Resistance
Common Mode Termination Resistance
Differential Mode Bias
Common Mode Bias
SYMBOL
CONDITION
MIN TYP MAX UNITS
Rdm
Rcm
Vdm
Vcm
100
110
100
105
150
112
110
190
Ohms
Ohms
mV
All lines Open
125
1.125 1.25
1.375
V
Single Ended Terminator Section
Output Capacitance
Cout
Rse
Vref
Iose
Note
--- ---
3
pF
Ohms
Volts
mA
SE Termination Resistance
SE Voltage Reference
SE output Current
Vline = 0-3.0 volts
104.5 110
2.79 2.85
115.5
2.93
25.4
Vline = 0.2 volts
---
---
Regulator Section
Line Regulation
LIREG
LOREG
ILIM
---
---
1.0
1.3
350
---
2.5
3.5
---
%
%
Load Regulation
Current Limit
---
mA
mA
Sink Current
ISINK
200
---
DC Section
SE mode (No Load)
LVD mode (No Load)
---
---
4
---
---
---
1.0
---
---
Termpower Current
Itpmr
mA
20
---
---
---
---
Input Leakage High
Iih
Iil
-1.0
---
µA
µA
Input Leakage Low
Output Current High
Ioh
Iol
Vout = 2.4 volts; SE/LVD/HVD Pins only
Vout=0.4 volts; SE/LVD/HVD Pins only
-1.0
4.0
mA
mA
Output Current Low
DIFFSENS Section
DIFFSENS SE Operating Range
DIFFSENS LVD Operating Range
DIFFSENS HVD Operating Range
DIFFSENSE Driver Output Voltage
DIFFSENSE Driver Source Current
DIFFSENSE Driver Sink Current
Note: Guaranteed by Design.
Vseor
Vlvdor
Vhvdor
Vdso
Idsh
-0.3
0.7
2.4
1.2
---
---
---
0.5
1.9
V
V
--- Vtpwr+0.3
V
M/S=1; Ids = 0-5mA
M/S = 1; Vdso=0V
M/S=1; Vdso=2.75V
---
5
1.4
15
V
mA
µA
Idsl
20
---
200
Ver: 1.4
Nov 05, 2004
TEL: 886-3-5788833
http://www.gmt.com.tw
5
Global Mixed-mode Technology Inc.
Typical Operating Characteristics
G219
Common Mode Bias Vcm -
Temperature
Common Mode Bias Vcm - Vtpwr
1.375
1.325
1.275
1.225
1.175
1.125
1.375
1.325
1.275
1.225
1.175
1.125
T=80ºC
Vtpwr=5.8V
Vtpwr=2.8V
T=-10ºC
2.5
3.5
4.5
Vtpwr
5.5
-20
0
20
40
60
80 100
Temperature(ºC)
Differential Mode Bias Vdm -
Temperature@Vtpwr=5V
Differential Mode Bias Vdm - Vtpwr
0.125
0.12
0.115
0.11
0.105
0.1
0.125
0.12
0.115
0.11
0.105
0.1
T=-10ºC
T=80ºC
-20
0
20
40
60
80 100
2.5
3.5
4.5
Vtpwr
5.5
Temperature(ºC)
Common Mode Termination Resistance
Rcm - Vtpwr @Temperature=24ºC
Common Mode Termination Resistance
Rcm - Temperature@Vtpwr=5V
190
190
180
170
160
150
140
130
120
110
180
170
160
150
140
130
120
110
2.5
3.5
4.5
Vtpwr
5.5
-20
0
20
40
60
80 100
Temperature(ºC)
Differential Mode Termination
Resistance Rdm - Vtpwr
Differential Mode Termination
Resistance Rdm - Temperature
110
109
108
107
106
105
104
103
102
101
100
110
108
106
104
102
100
T=80ºC
Vtpwr=2.8V
T=-10ºC
Vtpwr=5.8V
2.5
3.5
4.5
Vtpwr
5.5
-20
0
20
40
60
80 100
Temperature(ºC)
Ver: 1.4
Nov 05, 2004
TEL: 886-3-5788833
http://www.gmt.com.tw
6
Global Mixed-mode Technology Inc.
G219
SE Termination Resistance Rse -
Vtpwr @Vline=0V
SE Termination Resistance Rse -
Vtpwr @T=24ºC;Vline=0V
115
113
111
109
107
105
115
114
113
112
111
110
109
108
107
106
105
Vtpwr=3.8V
V
tpwr=5.8V
-20
0
20
40
60
80 100
3.5
4.5
Vtpwr
5.5
Temperature(ºC)
SE Termination Resistance Rse -
Vtpwr @Vtpwr=5V;T=24ºC
Vref - Ivref@Vtpwr=5V
2.93
2.91
2.89
2.87
2.85
2.83
2.81
2.79
115
113
111
109
107
105
T=80ºC
T=-10ºC
0
1
2
3
-250 -150 -50 50 150 250 350
Ivref(mA)
Vline
Vref - Vtpwr@T=24ºC
Vref - Temperature@Ivref=0mA
2.93
2.91
2.89
2.87
2.85
2.83
2.81
2.79
2.93
Ivref=-200mA
2.91
2.89
2.87
2.85
2.83
2.81
2.79
Vtpwr=5.8V
I
vref=0mA
Vtpwr=3.8V
Ivref=360mA
4.5
3.5
5.5
-20
0
20
40
60
80 100
Temperature(ºC)
Vtpwr
Ver: 1.4
TEL: 886-3-5788833
Nov 05, 2004
http://www.gmt.com.tw
7
Global Mixed-mode Technology Inc.
Pin Description (for 28pin TSSOP)
G219
PIN
SYMBOL
DESCRIPTION
Reference Voltage. 2.85-volt reference in SE mode and 1.25V in LVD mode; must be connected to a
1
VREF
4.7µF capacitor.
Signal Termination. (X=1,2,3,…..9)
2-5,7-12,
Rx+: Ground line for single-ended or positive line for differential applications for the SCSI bus.
Rx+, Rx-
18-21, 23-26
Rx-: Signal line/active line for single-ended or negative line in differential applications for the SCSI
bus.
6,22
13
NC/ HS GND No Connect/Heat Sink Ground. Should be grounded for heat sinking purpose
DISCNCT Disconnect. When pulled high, the G219 isolates its bus pins (Rx+, Rx-) from the SCSI bus.
14
GND
Ground. Terminator ground pin. Connected to ground.
Master/slave. Used to select which terminator is the controlling device. M/S pin high enables the
DIFFSENSE driver.
15
16
M/S
DIFFSENSE Output to drive the SCSI bus DIFFSENS line.
DIFFB pin should be connected to a 0.1µF capacitor to GND and 20k resistor to SCSI/Bus
17
DIFFB
TPWR
DIFFSENS line. An input pin to detect the type of device (differential or single-ended) on the SCSI
bus.
27,28
Terminator Power. Connect to the SCSI TERMPWR line and de-couple with a 2.2µF capacitor.
*The VREF keeps the level at 2.85 volt, despite the DISCNCT pin is asserted or not; even the termination mode is changed.
(36pin SSOP)
PIN
1
SYMBOL
VREF*
NC
DESCRIPTION
Reference Voltage. 2.85-volt reference; must be connected to a 4.7µF capacitor.
No Connect. Do not connect these pins.
2,3
4-7,11-16,
22-25,
29-32
8, 9,10,26,
27,28
17
Signal Termination. (X=1,2,3,…..9)
Rx+
Rx-
Rx+: Ground line for single-ended or positive line for differential applications for the SCSI bus.
Rx-: Signal line/active line for single-ended or negative line in differential applications for the SCSI bus.
Heat Sink Ground. Connect to large area PC board traces to increase power dissipation capabil-
ity.
HS/GND
DISCNCT Disconnect. When pulled high, the G219 isolates its bus pins (Rx+, Rx-) from the SCSI bus.
18
GND
Ground. Terminator ground pin. Connected to ground.
Master/slave. Used to select which terminator is the controlling device. M/S pin high enables the
DIFFSENSE driver.
19
20
M/S
DIFFSENSE Output to drive the SCSI bus DIFFSENS line.
DIFFB pin should be connected to a 0.1µF capacitor to GND and 20k resistor to SCSI/Bus
21
DIFFB
DIFFSENS line. An input pin to detect the type of device (differential or single-ended) on the SCSI
bus.
33
34
35
36
SE
LVD
Single ended mode indicator. It is HIGH when terminator is operating in SE mode.
Low Voltage Differential mode indicator. It is HIGH when terminator is operating in LVD mode.
High Voltage Differential mode indicator. It is HIGH when terminator is operating in HVD mode
Terminator Power. Connect to SCSI bus TERMPWR line and decouple with 2.2µF capacitor.
HVD
TPWR
*The VREF keeps the level at 2.85 volt, despite the DISCNCT pin is asserted or not; even the termination mode is changed.
Ver: 1.4
Nov 05, 2004
TEL: 886-3-5788833
http://www.gmt.com.tw
8
Global Mixed-mode Technology Inc.
Package Information
G219
D
28
L
E
E1
1
A2
A1
e
b
TSSOP-28 Package
Note:
1. Package body sizes exclude mold flash protrusions or gate burrs
2. Tolerance ±0.1mm unless otherwise specified
3. Coplanarity : 0.1mm
4. Controlling dimension is in millimeter. Converted inch dimensions are not necessarily accurate.
5. Follow JEDEC MO-153
DIMENSION IN MM
DIMENSION IN INCH
SYMBOL
MIN.
-----
0.05
0.80
0.19
0.09
9.60
-----
4.30
-----
0.45
-----
0º
NOM.
-----
MAX.
1.20
0.15
1.05
0.30
0.20
9.80
-----
MIN.
-----
NOM.
-----
MAX.
0.048
0.006
0.041
0.012
0.008
0.386
-----
A
A1
A2
b
-----
0.002
0.031
0.007
0.004
0.378
-----
-----
1.00
-----
0.039
-----
C
-----
-----
D
9.70
6.40
4.40
0.65
0.60
-----
0.382
0.252
0.173
0.026
0.024
-----
E
E1
e
4.50
-----
0.169
-----
0.177
-----
L
0.75
0.10
8º
0.018
-----
0.030
0.004
8º
y
θ
-----
0º
-----
Ver: 1.4
Nov 05, 2004
TEL: 886-3-5788833
http://www.gmt.com.tw
9
Global Mixed-mode Technology Inc.
G219
L
E1
E
h x
45
°
D
A
A1
0.004
C
SEATING PLANE
b
e
SSOP-36 Package
DIMENSION IN MM
DIMENSION IN INCH
SYMBOL
MIN.
2.413
0.203
0.300
0.127
15.748
TYP.
2.591
0.305
-----
MAX.
2.794
0.406
0.450
0.254
16.002
MIN.
0.095
0.008
0.012
0.005
0.620
TYP.
0.102
0.012
-----
MAX.
0.110
0.016
0.018
0.010
0.630
A
A1
b
c
-----
-----
D
e
15.875
0.800 BASIC
-----
0.625
0.032 BASIC
-----
E
10.033
7.391
0.381
0.508
0
10.668
7.595
0.635
1.016
8
0.395
0.291
0.015
0.020
0
0.420
0.289
0.025
0.040
8
E1
h
7.493
-----
0.295
-----
L
θ
-----
-----
-----
-----
Taping Specification
PACKAGE
TSSOP-28
SSOP-36
Q’TY/REEL
2,500 ea
Q’TY/TUBE
50 ea
1,000 ea
29 ea
F e e d D ire c tio n
T y p ic a l S S O P , T S S O P P a c k a g e O rie n ta tio n
GMT Inc. does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and GMT Inc. reserves the right at any time without notice to change said circuitry and specifications.
Ver: 1.4
Nov 05, 2004
TEL: 886-3-5788833
http://www.gmt.com.tw
10
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