SP791

Low Power Microprocessor Supervisory with Battery Switch-Over
Data Sheets OBS (Obsolete)

Overview

Information Low Power Microprocessor Supervisory with Battery Switch-Over
# of Channels 1
VCC MIN (V) 1
VCC MAX (V) 5.5
Reset Threshold (V) 4.65
Reset Output Active-low
Output Driver Type Push-pull
Reset Accuracy (mV) 125
Special Features Wachdog Timer, Manual Reset, Back-up Battery Switchover, Power Fail-Low Battery Indicator, Chip Enable Gating
Watchdog Timeout (s) Adj
Reset Time Delay (ms) 200
Temperature Range (°C) 0 to 70
Package NSOIC-16
IQ (µA) typ 40
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  • Precision 4.65V voltage monitoring
  • 200ms power-OK/reset time delay
  • Independent watchdog time-preset or adjustable
  • 75mA maximum operating supply current
  • 1.0mA maximum battery backup current
  • 0.1mA maximum battery standby current
  • Power switching
    • 250mA output in Vcc mode (0.6 Ohms)
    • 25mA output in battery mode (5 Ohms)
  • 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 MAX791

Documentation & Design Tools

All Types Data Sheets Product Briefs & Brochures User Guides & Manuals
Type Title Version Date File Size
Data Sheets SP791 Low Power Microprocessor Supervisory with Battery Switch-Over 1.0.0 June 2005 213.7 KB
User Guides & Manuals SP791 Evaluation Board Manual 4.0.0 October 2000 42 KB
Product Brochures Power Management Brochure May 2024 7.1 MB
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Parts & Purchasing

Part Number Pkg Code Min Temp Max Temp Status Suggested Replacement PDN
SP791CN NSOIC16 0 70 OBS
SP791CN-L NSOIC16 0 70 OBS SP791CN-L/TR
SP791CN-L/TR NSOIC16 0 70 OBS
SP791CN/TR NSOIC16 0 70 OBS
SP791CP PDIP16 0 70 OBS
SP791CP-L PDIP16 0 70 OBS
SP791CS PDIP16 0 70 OBS
SP791EN NSOIC16 -40 85 OBS
SP791EN-L NSOIC16 -40 85 OBS
SP791EN-L/TR NSOIC16 -40 85 OBS
SP791EN/TR NSOIC16 -40 85 OBS
SP791EP PDIP16 -40 85 OBS
SP791EP-L PDIP16 -4 85 OBS
SP791XN NSOIC16 OBS
SP791XN-1 NSOIC16 OBS
SP791XN-2 NSOIC16 OBS
SP791XP PDIP16 OBS
SP791XP-1 PDIP16 OBS
SP791XP-2 PDIP16 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.

Packaging

Pkg Code Details Quantities Dimensions
NSOIC16
  • 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
PDIP16
  • 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

Notifications

Distribution Date Description File
07/17/2023 In 2023, MaxLinear will be converting all shipping labels for the parts noted from an EXAR format to MaxLinear’s label. During this transition customers may receive either label. This change affects only shipping and packing labels. This change will not affect the part number, part marking, manufacturing process or manufacturing sites. Only work in progress material will be converted. Existing inventory from MaxLinear’s warehouse, channel sales, distributor, and such, will not be converted. Hence, customers may experience receiving mixed shipments with both Exar and MaxLinear labels for some period until existing inventory of old labels is eventually cleared out. Situation is product to product with no predictable way to determine when all old labels will be exhausted. No change to product form, fit, function and reliability. ADDENDUM A: Fixed MBB label logo for DX204001 to MaxLinear logo. ADDENDUM B: Replaced ‘All other affected products outer box label’ with clearer pictures. Corrected Date Issued (from original PCN) issue date +90 days to August 30, 2023.
06/01/2023 In 2023, MaxLinear will be converting all shipping labels for the parts noted from an EXAR format to MaxLinear’s label. During this transition customers may receive either label. This change affects only shipping and packing labels. This change will not affect the part number, part marking, manufacturing process or manufacturing sites. Only work in progress material will be converted. Existing inventory from MaxLinear’s warehouse, channel sales, distributor, and such, will not be converted. Hence, customers may experience receiving mixed shipments with both Exar and MaxLinear labels for some period until existing inventory of old labels is eventually cleared out. Situation is product to product with no predictable way to determine when all old labels will be exhausted. No change to product form, fit, function and reliability.
06/01/2023 In 2023, MaxLinear will be converting all shipping labels for the parts noted from an EXAR format to MaxLinear’s label. During this transition customers may receive either label. This change affects only shipping and packing labels. This change will not affect the part number, part marking, manufacturing process or manufacturing sites. Only work in progress material will be converted. Existing inventory from MaxLinear’s warehouse, channel sales, distributor, and such, will not be converted. Hence, customers may experience receiving mixed shipments with both Exar and MaxLinear labels for some period until existing inventory of old labels is eventually cleared out. Situation is product to product with no predictable way to determine when all old labels will be exhausted. No change to product form, fit, function and reliability. ADDENDUM: Fixed MBB label logo for DX204001 to MaxLinear logo.
07/11/2017 Product Discontinuation Notification
02/15/2017 Qualification of alternate assembly subcon, ANST.
07/26/2016 Product discontinuation notification. Discontinued.
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.
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).
03/04/2009 Notice of Obsolescence Discontinued by Exar Corporation due to low market demand
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

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