Low Power Microprocessor Supervisory with Battery Switch-Over
Data Sheet



  • Precision 4.65V/4.40V voltage monitoring
  • 200ms or adjustable reset time
  • 100ms, 1.6s or adjustable watchdog time
  • 60µA maximum operating supply current
  • 2.0µA maximum battery backup current
  • 0.1µA maximum battery standby current
  • Power switching
  • 250mA output in Vcc mode (0.6Ω)
  • 25mA output in battery mode (5Ω)
  • On-board gating of chip-enable signals
  • Memory write-cycle completion
  • 6ns CE gate propagation delay
  • Voltage monitor for power-fail or low battery
  • Backup-battery monitor
  • RESET valid to Vcc=1V
  • Pin compatible upgrade to MAX691A/693A


Design Tools


Pkg Code Details Quantities Dimensions PDF
  • JEDEC Reference: MS-012
  • MSL Pb-Free: L2 @ 260ºC
  • MSL SnPb Eutectic: n/a
  • ThetaJA: 82.2ºC/W
  • Bulk Pack Style: Tube
  • Quantity per Bulk Pack: 49
  • Quantity per Reel: 2500
  • Quantity per Tube: 49
  • Quantity per Tray: n/a
  • Reel Size (Dia. x Width x Pitch): 330 x 16 x 8
  • Tape & Reel Unit Orientation: Quadrant 1
  • Dimensions: mm
  • Length: 9.90
  • Width: 3.90
  • Thickness: 1.75
  • Lead Pitch: 1.27
  • JEDEC Reference: MS-001
  • MSL Pb-Free: n/a
  • MSL SnPb Eutectic: n/a
  • ThetaJA: 69.9ºC/W
  • Bulk Pack Style: Tube
  • Quantity per Bulk Pack: 25
  • Quantity per Reel: n/a
  • Quantity per Tube: 25
  • Quantity per Tray: n/a
  • Reel Size (Dia. x Width x Pitch): n/a
  • Tape & Reel Unit Orientation: n/a
  • Dimensions: inch
  • Length: 0.75
  • Width: 0.25
  • Thickness: 0.13
  • Lead Pitch: 0.10
  • JEDEC Reference: MS-013
  • MSL Pb-Free: L3 @ 260ºC
  • MSL SnPb Eutectic: n/a
  • ThetaJA: 69.1ºC/W
  • Bulk Pack Style: Tube
  • Quantity per Bulk Pack: 47
  • Quantity per Reel: 1500
  • Quantity per Tube: 47
  • Quantity per Tray: n/a
  • Reel Size (Dia. x Width x Pitch): 330 x 16 x 12
  • Tape & Reel Unit Orientation: Quadrant 1
  • Dimensions: mm
  • Length: 10.30
  • Width: 7.50
  • Thickness: 2.65
  • Lead Pitch: 1.27

Parts & Purchasing

Part Number Pkg Code Min Temp Max Temp Status Buy Now Order Samples
SP691ACN-L NSOIC16 0 70 Active Order
SP691ACN-L/TR NSOIC16 0 70 OBS Suggested:
SP691ACP PDIP16 0 70 OBS
SP691ACP-L PDIP16 0 70 OBS Suggested:
SP691ACT-L WSOIC16 0 70 OBS Suggested:
SP691ACT-L/TR WSOIC16 0 70 Active Order
SP691AEN NSOIC16 -40 85 OBS
SP691AEN/TR NSOIC16 -40 85 OBS
SP691AEN-L NSOIC16 -40 85 OBS Suggested:
SP691AEN-L/TR NSOIC16 -40 85 Active Order
SP691AEP PDIP16 -40 85 OBS
SP691AEP-L PDIP16 -40 85 OBS Suggested:
SP691AET WSOIC16 -40 85 OBS
SP691AET/TR WSOIC16 -40 85 OBS
SP691AET-L WSOIC16 -40 85 OBS Suggested:
SP691AET-L/TR WSOIC16 -40 85 OBS Suggested:
SP691AXN NSOIC16 -40 85 OBS
SP691AXN-1 NSOIC16 -40 85 OBS
SP691AXN-2 NSOIC16 -40 85 OBS
SP691AXP PDIP16 -40 85 OBS
SP691AXP-1 PDIP16 -40 85 OBS
SP691AXP-2 PDIP16 -40 85 OBS
SP691AXT WSOIC16 -40 85 OBS
SP691AXT-1 WSOIC16 -40 85 OBS
SP691AXT-2 WSOIC16 -40 85 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 & Environmental Data

Part Number RoHS | Exempt RoHS Halogen Free REACH MSL Rating / Peak Reflow Package
SP691ACN-L N Y Y Y L2 / 260ᵒC NSOIC16
SP691AEN-L/TR N Y Y Y L2 / 260ᵒC NSOIC16
SP691ACT-L/TR N Y Y Y L3 / 260ᵒC WSOIC16

Click on the links above to download the Certificate of Non-Use of Hazardous Substances.

Additional Quality Documentation may be available, please Contact Support.
Distribution Date Description File
12/12/2018 Product Discontinuation Notice
08/10/2017 Qualification of alternate assembly subcon, ANST.
07/11/2017 Product Discontinuation Notification
02/15/2017 Qualification of alternate assembly subcon, ANST.
07/26/2016 Product discontinuation notification. Discontinued.
11/16/2015 Updated information subsequent to original published PCN 15-0625-02 on 09/29/2015. Addendum: Update to package marking.
09/29/2015 Greatek as alternate assembly site Addition of an alternate production site, Greatek, Taiwan for 16L, 24L and 28L SOICW
07/02/2013 Addition of an alternate qualified assembly supplier, Carsem (Malaysia) for 14 and 16 lead NSOIC package using copper wire bonding. Material change.
10/17/2011 Product Discontinuation Notice. Selected Power Management products listed have been discontinued by Exar Corporation in their through-hole package form.
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).
09/29/2008 Product assembly of 14/16/18 lead PDIP families will be transferred from Unisem-Ipoh (Malaysia) to Unisem-Batam (Indonesia). Business consolidation and use of environmental friendly material.
02/28/2007 Product Obsolescence Letter and Discontinuation Notification. Discontinued.
02/02/2006 Announcing transfer of certain Power Management and Interface Products from Hillview fabrication and facility to wafer foundary Silan. 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


Search our list of FAQs for answers to common technical questions.
For material content, environmental, quality and reliability questions review the Quality tab or visit our Quality page.
For ordering information and general customer service visit our Contact Us page.

Frequently Asked Questions

The best way to determine this is to go to maxlinear.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. Click on part number header or on the link at the bottom of the result.  This brings you to the product page. For example:


Click on Parts & Purchasing, highlighted with the blue arrow 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, the legend still present:


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


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.

Submit a Technical Support Question As a New Question