ds2129 Maxim Integrated Products, Inc., ds2129 Datasheet

no-image

ds2129

Manufacturer Part Number
ds2129
Description
Ds2129 Lvd Scsi 27-line Regulator
Manufacturer
Maxim Integrated Products, Inc.
Datasheet
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 (475Ω, 121Ω, 475Ω), 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.
Rev 1; 2/06
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.
BANDGAP
(1.25V)
SCSI Array Backplane
SCSI Cables
PTAT
REF125
REFERENCES
THERMAL
SHUTDOWN
General Description
TERMPWR
REF175
REF130
REF075
GND
Block Diagram
Applications
TS
TS
TS
TS
______________________________________________ Maxim Integrated Products
1.75V
0.75V
1.3V
DS2129
REG1
REG2
DIFFSENSE
LVD SCSI 27-Line Regulator
♦ Fully Compliant with SPI-2 and SPI-3
♦ 2.7V to 5.25V Operation
♦ Differential Fail-Safe Bias
+ 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.
DS2129S
DS2129S+
DS2129S/T&R
DS2129S+T&R
TOP VIEW
PART*
DIFFSENSE
TERMPWR
HS_GND
REG2
REG1
GND
N.C.
N.C.
VOLTAGE (V)
1
2
3
4
5
6
7
8
Ordering Information
SO (150 mils)
5
5
5
5
DS2129
Pin Configuration
PIN-
PACKAGE
16 SO
16 SO
16 SO
16 SO
16
15
14
13
12
11
10
9
N.C.
N.C.
HS_GND
HS_GND
HS_GND
HS_GND
N.C.
N.C.
Features
TOP
MARK**
DS2129
DS2129
DS2129
DS2129
1

Related parts for ds2129

ds2129 Summary of contents

Page 1

... Rev 1; 2/06 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 (475Ω, 121Ω, 475Ω), the ...

Page 2

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 (T = +70°C) A 16-Pin SO (derate 13mW/°C above +70°C)........................1W Stresses beyond those listed under “Absolute Maximum Ratings” may ...

Page 3

... Thermal-Shutdown Hysteresis (Note 2) Note 1: All voltages are referenced to ground. Note 2: Guaranteed by design and not production tested. TERMPWR 2.7V TO 5.25V 4.7μF LVD SCSI 27-Line Regulator CONDITIONS For increasing temperature TERMPWR DIFFSENSE DS2129 REG1 4.7μF 475Ω 1% REG2 4.7μF 475Ω 1% 475Ω 1% 475Ω ...

Page 4

... DIFFSENSE bus DIFFSENSE line. Detailed Description The DS2129 provides three regulated outputs. The REG1 provides a 1.75V output, and the REG2 provides a 0.75V output. Both regulators can sink and source 200mA of current. These regulators are current-limited to less than 700mA. The thermal-shutdown circuit dis- ables the output buffers should the die temperature exceed +150° ...

Page 5

... Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 _____________________ 5 © 2006 Maxim Integrated Products LVD SCSI 27-Line Regulator 0∞-8∞ L SIDE VIEW Printed USA is a registered trademark of Maxim Integrated Products, Inc. Package Information INCHES MILLIMETERS MAX MAX DIM MIN MIN A 0.053 ...

Related keywords