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What is DS2129?

This electronic component, produced by the manufacturer "Dallas Semiconducotr", performs the same function as "LVD SCSI 27-Line Regulator".


DS2129 Datasheet PDF - Dallas Semiconducotr

Part Number DS2129
Description LVD SCSI 27-Line Regulator
Manufacturers Dallas Semiconducotr 
Logo Dallas Semiconducotr Logo 


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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 equivalent
LVD SCSI 27-Line Regulator
Package Information
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,
go to www.maxim-ic.com/packages).
N
1
TOP VIEW
EH
D
e B A1
FRONT VIEW
A
INCHES
DIM MIN MAX
A 0.053 0.069
A1 0.004 0.010
B 0.014 0.019
C 0.007 0.010
e 0.050 BSC
E 0.150 0.157
H 0.228 0.244
L 0.016 0.050
MILLIMETERS
MIN MAX
1.35 1.75
0.10 0.25
0.35 0.49
0.19 0.25
1.27 BSC
3.80 4.00
5.80 6.20
0.40 1.27
VARIATIONS:
INCHES
DIM MIN
D 0.189
D 0.337
D 0.386
MAX
0.197
0.344
0.394
MILLIMETERS
MIN
4.80
8.55
9.80
MAX
5.00
8.75
10.00
N MS012
8 AA
14 AB
16 AC
C
0-8
L
SIDE VIEW
PROPRIETARY INFORMATION
TITLE:
PACKAGE OUTLINE, .150" SOIC
APPROVAL
DOCUMENT CONTROL NO.
21-0041
REV.
B
1
1
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 _____________________ 5
© 2006 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products, Inc.


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