PDF DS2129 Data sheet ( Hoja de datos )

Número de pieza	DS2129
Descripción	LVD SCSI 27-Line Regulator
Fabricantes	Dallas Semiconducotr
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No Preview Available ! 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 (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. 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. 1 page 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. 5 Page

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