Precision Adjustable Shunt Regulator
Data Sheet



  • Trimmed bandgap reference to 0.4%
  • Wide operating current 1mA to 150mA
  • Extended temperature range:
  • -55°C to 125°C
  • Low temperature coefficient 30 ppm/°C
  • Offered in SOIC, SOT-89



Design Tools

Symbols & Footprints


Pkg Code Details Quantities Dimensions PDF
  • JEDEC Reference: MS-012
  • MSL Pb-Free: L1 @ 260ºC
  • MSL SnPb Eutectic: n/a
  • ThetaJA: 128.4ºC/W (std); 96.8ºC/W (fused)
  • Bulk Pack Style: Tube
  • Quantity per Bulk Pack: 98
  • Quantity per Reel: 2500
  • Quantity per Tube: 98
  • Quantity per Tray: n/a
  • Reel Size (Dia. x Width x Pitch): 330 x 12 x 8
  • Tape & Reel Unit Orientation: Quadrant 1
  • Dimensions: mm
  • Length: 4.90
  • Width: 3.90
  • Thickness: 1.75
  • Lead Pitch: 1.27
  • JEDEC Reference: MO-178
  • MSL Pb-Free: L1 @ 260ºC
  • MSL SnPb Eutectic: n/a
  • ThetaJA: 191ºC/W
  • Bulk Pack Style: Canister
  • Quantity per Bulk Pack: n/a
  • Quantity per Reel: 3000
  • Quantity per Tube: n/a
  • Quantity per Tray: n/a
  • Reel Size (Dia. x Width x Pitch): 180 x 8 x 12
  • Tape & Reel Unit Orientation: 3 Pins at sprocket hole.
  • Dimensions: mm
  • Length: 2.90
  • Width: 1.60
  • Thickness: 1.45
  • Lead Pitch: 0.95
  • JEDEC Reference: TO-243
  • MSL Pb-Free: L2 @ 260ºC
  • MSL SnPb Eutectic: n/a
  • ThetaJA: 107.1ºC/W
  • Bulk Pack Style: Canister
  • Quantity per Bulk Pack: n/a
  • Quantity per Reel: 2500
  • Quantity per Tube: n/a
  • Quantity per Tray: n/a
  • Reel Size (Dia. x Width x Pitch): 330 x 12 x 8
  • Tape & Reel Unit Orientation: Tab at sprocket hole.
  • Dimensions: mm
  • Length: 4.60 max
  • Width: 2.60 max
  • Thickness: 1.60
  • Lead Pitch: 1.50

Parts & Purchasing

Part Number Pkg Code RoHS Min Temp Max Temp Status Buy Now Order Samples
SPX1431M1 SOT-89-3 -55 125 OBS
SPX1431M1/TR SOT-89-3 -55 125 OBS
SPX1431M1-L SOT-89-3 -55 125 OBS Suggested:
SPX1431M1-L/TR SOT-89-3 -55 125 Active Order
SPX1431M5 SOT-23-5 OBS
SPX1431M5/TR SOT-89-3 -55 125 OBS
SPX1431M5-L SOT-89-3 -55 125 OBS
SPX1431M5-L/TR SOT-89-3 -55 125 OBS
SPX1431N TO-92 -55 125 OBS
SPX1431N-L TO-92 -55 125 OBS
SPX1431N-L/TR TO-92 -55 125 OBS
SPX1431S NSOIC8 -55 125 OBS
SPX1431S/TR NSOIC8 -55 125 OBS
SPX1431S-L NSOIC8 -55 125 OBS
SPX1431S-L/TR NSOIC8 -55 125 OBS
Show obsolete parts
Part Status Legend
Active - the part is released for sale, standard product.
EOL (End of Life) - the part is no longer being manufactured, there may or may not be inventory still in stock.
CF (Contact Factory) - the part is still active but customers should check with the factory for availability. Longer lead-times may apply.
PRE (Pre-introduction) - the part has not been introduced or the part number is an early version available for sample only.
OBS (Obsolete) - the part is no longer being manufactured and may not be ordered.
NRND (Not Recommended for New Designs) - the part is not recommended for new designs.

Quality Documents

Part Number REACH
SPX1431M1-L Download
SPX1431S-L Download
SPX1431M1-L/TR Download
Additional Quality Documentation may be available, please contact customersupport@maxlinear.com.
Distribution Date Description File
07/26/2016 Product discontinuation notification. Discontinued. PDN 16-0626-01-1033.pdf
04/13/2016 Qualification of alternate assembly subcon, JCET. PCN 16-0207-02 JCET-1033.pdf
04/01/2016 Qualification of alternate assembly subcon, JCET. PCN 15-0727-02 JCET-1033.pdf
03/13/2014 Qualification of an alternate SOT89 package assembly site, Greatek, Taiwan, in addition to the current qualified assembly site, Cirtek, Philippines. Alternate assembly site. PCN_13-1040-01-1033.pdf
07/15/2013 Package marking change. To add manufacturing date code and lot traceability. PCN_13-0728-03a-1033.pdf
03/23/2010 Alternate qualified assembly supplier Capacity enhancement PCN_10-0311-01-1033.pdf
12/07/2009 Enhancement of NSOIC 8, NSOIC14 and NSOIC16 packages to Green (halogen-free) via Mold Compound & Die Attach Material. Enhance packages to be Green (halogen-free). PCN_09-0911-01-1033.pdf
03/04/2009 Notice of Obsolescence Discontinued by Exar Corporation due to low market demand PDN_090304-01-1033.pdf
05/16/2007 Announcing the re-activation of previously announced discontinued products. The previously announced discontinued products listed above are being re-activated due to continuing Customer demand. PCN_07-0508-01-1033.pdf
02/28/2007 Product Obsolescence Letter and Discontinuation Notification. Discontinued. POL_022807-1033.pdf
02/02/2006 Announcing transfer of certain Power Management and Interface Products from Hillview fabrication facility to wafer foundary BCD. See attached Product List Power Management and Interface products as listed are being transfer to external wafer foundry, due to cessation of operations of the sipex Hillview Fabrication manufacturing site PCN-06-0130-43-1033.pdf

Frequently Asked Questions

The best way to determine this is to go to exar.com and type the part into the search function. At or near the top of the results you should see something that looks like

In this example, we looked for XRA1201. When you hover over it, it will turn grey and you can click anywhere in the grey box. This brings you to the product page. For example:


Click on Parts & Purchasing, highlighted in yellow above. The screen changes to:


Notice the status column and the “Show obsolete parts” link:


A legend tells you the definition of the different statuses. Click on the “Show obsolete parts” link to see EOL or OBS part numbers along with the Active part numbers:


Another method to find out if a part is OBS or EOL is to click on SUPPORT:


And then Product Change Notifications


Type the part into the search, and click on one of the part numbers from the drop down menu. Then you can look for the Product Discontinuation Notice, which generally is at the top of the list, for example:


If you see this, it tells you that this particular orderable part has been discontinued and when the last order date is, or was. If you click on the file, then you can view the notice we sent about this if you purchased the part in the recent past. It may also advise of a replacement part. When an orderable part first becomes discontinued, Product Discontinuation Notices are sent are sent to those who have purchased the parts in the recent past, if purchased directly, with a dated opportunity to place a last order.