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DS2129 PDF даташит

Спецификация DS2129 изготовлена ​​​​«Dallas Semiconducotr» и имеет функцию, называемую «LVD SCSI 27-Line Regulator».

Детали детали

Номер произв DS2129
Описание LVD SCSI 27-Line Regulator
Производители Dallas Semiconducotr
логотип Dallas Semiconducotr логотип 

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DS2129 Даташит, Описание, Даташиты
www.DataSheet4U.com
Rev 1; 2/06
LVD SCSI 27-Line Regulator
General Description
The DS2129 is a triple-output voltage regulator for
27-line, low-voltage-differential (LVD) SCSI termination
for SPI-2 and SPI-3 applications using LVD termination
networks. The device provides reference voltages and
bias currents for LVD-termination resistor pi (π) net-
works. With a pi network (475, 121, 475), the
DS2129 meets the common-mode bias, differential
bias, and termination-impedance requirements of SPI-2
(Ultra2) and SPI-3 (Ultra3). The device also provides a
1.3V output for DIFFSENSE signaling, and includes pro-
tection features such as thermal shutdown and active
current limiting.
Applications
SCSI Array Backplane
SCSI Cables
Block Diagram
TERMPWR
PTAT
BANDGAP REF125
(1.25V)
THERMAL
SHUTDOWN
REFERENCES
REF175
TS
DS2129
TS
1.75V
REG1
REF130
REF075
GND
TS
0.75V
REG2
TS
1.3V
DIFFSENSE
Features
Fully Compliant with SPI-2 and SPI-3
2.7V to 5.25V Operation
Differential Fail-Safe Bias
Ordering Information
PART*
DS2129S
VOLTAGE (V) PIN-
PACKAGE
5 16 SO
TOP
MARK**
DS2129
DS2129S+
5 16 SO
DS2129
DS2129S/T&R
5 16 SO
DS2129
DS2129S+T&R
5 16 SO
DS2129
+Denotes lead-free package.
*All devices rated for the commercial (0°C to +70°C) tempera-
ture range.
**A “+” anywhere on the topmark denotes a lead-free package.
Pin Configuration
TOP VIEW
N.C. 1
TERMPWR 2
REG2 3
GND 4
HS_GND 5
REG1 6
DIFFSENSE 7
N.C. 8
DS2129
16 N.C.
15 N.C.
14 HS_GND
13 HS_GND
12 HS_GND
11 HS_GND
10 N.C.
9 N.C.
SO (150 mils)
______________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.









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DS2129 Даташит, Описание, Даташиты
LVD SCSI 27-Line Regulator
ABSOLUTE MAXIMUM RATINGS
TERMPWR, DIFFSENSE, REG1, REG2 ....................-0.3V, +6.0V
REG1, REG2 Continuous Output Current.......................±200mA
Continuous Power Dissipation (TA = +70°C)
16-Pin SO (derate 13mW/°C above +70°C)........................1W
Operating Temperature Range...............................0°C to +70°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Soldering Temperature .......................................See IPC/JEDEC
J-STD-020A Specification
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(TERMPWR = 3.3V, TA = 0°C to +70°C, unless otherwise noted.) (Note 1)
PARAMETER
TERMPWR
TERMPWR Supply Current
TERMPWR Voltage
VREF REGULATOR
0.75V Regulator Output Voltage,
REG2
SYMBOL
ITERM
VTERM
No load
CONDITIONS
V075 IOUT = ±125mA
MIN TYP MAX UNITS
40 mA
2.7 5.25 V
0.7 0.75 0.8
V
0.75V Regulator Source Current,
REG2
ISRC_075 VOUT = 0.25V
-200
mA
0.75V Regulator Sink Current,
REG2
ISINK_075 VOUT = 1.25V
+200
mA
0.75V Regulator Source Current
Limit
ISRCL_075 VOUT = 0V
-700
mA
0.75V Regulator Sink Current
Limit
ISINKL_075 VOUT = 3.3V
+700 mA
1.75V Regulator Output Voltage,
REG1
V175 IOUT = ±125mA
1.7 1.75 1.8
V
1.75V Regulator Source Current,
REG1
ISRC_175 VOUT = 1.25V
-200
mA
1.75V Regulator Sink Current,
REG1
ISINK_175 VOUT = 2.25V
+200
mA
1.75V Regulator Source Current
Limit
ISRCL_175 VREF = 0V
-700
mA
1.75V Regulator Sink Current
Limit
DIFFSENSE OUTPUT
DIFFSENSE Driver Output
Voltage
ISINKL_175 VREF = 3.3V
VDSO -5mA IDIFFSENSE 50µA
+700 mA
1.2 1.3 1.4
V
DIFFSENSE Driver Source
Current
DIFFSENSE Driver Sink Current
IDSH
IDSL
VDIFFSENSE = 0V
VDIFFSENSE = 2.4V
-5 -15 mA
100 200 µA
2 _____________________________________________________________________









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DS2129 Даташит, Описание, Даташиты
LVD SCSI 27-Line Regulator
ELECTRICAL CHARACTERISTICS (continued)
(TERMPWR = 3.3V, TA = 0°C to +70°C, unless otherwise noted.) (Note 1)
PARAMETER
THERMAL SHUTDOWN
SYMBOL
CONDITIONS
Thermal-Shutdown Threshold
(Note 2)
For increasing temperature
Thermal-Shutdown Hysteresis
(Note 2)
Note 1: All voltages are referenced to ground.
Note 2: Guaranteed by design and not production tested.
MIN TYP MAX UNITS
+150
10
°C
°C
TERMPWR
2.7V TO 5.25V
TERMPWR
4.7µF
DIFFSENSE
Typical Operating Circuit
DIFFSENSE
DS2129 REG1
REG2
4.7µF
4.7µF
475
1%
121
1%
475
1%
R1N
R1P
R2N
R26P
475
1%
121
1%
475
1%
R27N
R27P
_____________________________________________________________________ 3










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