MAX6726：Dual/Triple Ultra-Low-Voltage SOT23 µP Supervisory Circuits

The MAX6715-MAX6729 are ultra-low-voltage microprocessor (µP) supervisory circuits designed to monitor two or three system power-supply voltages. These devices assert a system reset if any monitored supply falls below its factory-trimmed or adjustable threshold and maintain reset for a minimum timeout period after all supplies rise above their thresholds. The integrated dual/triple supervisory circuits significantly improve system reliability and reduce size compared to separate ICs or discrete components. These devices monitor primary supply voltages (VCC1) from 1.8V to 5.0V and secondary supply voltages (VCC2) from 0.9V to 3.3V with factory-trimmed reset threshold voltage options (see Reset Voltage Threshold Suffix Guide). An externally adjustable RSTIN input option allows customers to monitor a third supply voltage down to 0.62V. These devices are guaranteed to be in the correct reset output logic state when either VCC1 or VCC2 remains greater than 0.8V. A variety of push-pull or open-drain reset outputs along with watchdog input, manual reset input, and power-fail input/output features are available (see Selector Guide). Select reset timeout periods from 1.1ms to 1120ms (min) (see Reset Timeout Period Suffix Guide). The MAX6715-MAX6729 are available in small 5, 6, and 8-pin SOT23 packages and operate over the -40°C to +85°C temperature range.

Key Features
  • VCC1 (primary supply) Reset Threshold Voltages from 1.58V to 4.63V
  • VCC2 (secondary supply) Reset Threshold Voltages from 0.79V to 3.08V
  • Externally Adjustable RSTIN Threshold for Auxiliary/Triple-Voltage Monitoring (0.62V internal reference)
  • Watchdog Timer Option
    • 35s (min) Long Startup Period
    • 1.12s (min) Normal Timeout Period
  • Manual Reset Input Option
  • Power-Fail Input/Power-Fail Output Option (Push-Pull and Open-Drain Active-Low)
  • Guaranteed Reset Valid Down to VCC1 or VCC2 = 0.8V
  • Reset Output Logic Options
  • Immune to Short VCC Transients
  • Low Supply Current 14µA (typ) at 3.6V
  • Small 5, 6, and 8-Pin SOT23 Packages
MAX6715, MAX6716, MAX6717, MAX6718, MAX6719, MAX6720, MAX6721, MAX6722, MAX6723, MAX6724, MAX6725, MAX6726, MAX6727, MAX6728, MAX6729: Typical Operating Circuit
MAX6715, MAX6716, MAX6717, MAX6718, MAX6719, MAX6720, MAX6721, MAX6722, MAX6723, MAX6724, MAX6725, MAX6726, MAX6727, MAX6728, MAX6729: Typical Operating Circuit
Applications/Uses
  • Computers/Servers
  • Industrial Equipment
  • Multivoltage Systems
  • Portable Battery-Powered Equipment
  • Printers and Faxes
  • Set-Top Boxes
  • Telecom/Networking Equipment
DataSheet
titleDownload file
MAX6715-MAX6729 Data SheetMAX6715-MAX6729.pdf
Parametrics
Part NumberInterfaceReset Thresh.
(V)		Reset OuttRESETWatchdog FeatureWatchdog TimeoutSupervisor FeaturesReset Thresh. Accur.
(%)		ICC
(µA)		Package/PinsBudgetary
Price
min@ +25°CmaxSee Notes
MAX6715Factory Fixed0 to 1.2
1.2 to 1.8
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5		Active Low
Open Drain		1ms to 15ms
15ms to 85ms
85ms to 300ms
300ms to 1s
>1s		No Watchdog-Manual Reset2.537SOT/6$3.21 @1k
MAX6716Active Low
Push-Pull		No Watchdog-Manual ResetSOT/6$3.21 @1k
MAX6717Active Low
Open Drain		No Watchdog-Manual ResetSOT/5$3.21 @1k
MAX6718Active Low
Push-Pull		No Watchdog-Manual ResetSOT/5$3.21 @1k
MAX6721Active Low
Open Drain		Extended Setup Period
Input (WDI)		1s to 2s
>2s		Manual ResetSOT/6$3.21 @1k
MAX6722Active Low
Push-Pull		Extended Setup Period
Input (WDI)		1s to 2s
>2s		Manual ResetSOT/6$2.85 @1k
MAX6728Active Low
Open Drain		Extended Setup Period
Input (WDI)		1s to 2s
>2s		Adjustable Reset Input
Manual Reset
Power Fail Comparator/Low Battery Detect		SOT/8$3.21 @1k
MAX6729Active Low
Push-Pull		Extended Setup Period
Input (WDI)		1s to 2s
>2s		Adjustable Reset Input
Manual Reset
Power Fail Comparator/Low Battery Detect		SOT/8$3.21 @1k

Part NumberInterfaceReset Thresh.
(V)		Reset OuttRESETWatchdog FeatureWatchdog TimeoutSupervisor FeaturesReset Thresh. Accur.
(%)		ICC
(µA)		Package/PinsBudgetary
Price
min@ +25°CmaxSee Notes
MAX6719Factory Fixed0 to 1.2
1.2 to 1.8
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5		Active Low
Open Drain		1ms to 15ms
15ms to 85ms
85ms to 300ms
300ms to 1s
>1s		No Watchdog-Adjustable Reset Input
Manual Reset		2.537SOT/6$3.21 @1k
MAX6720Active Low
Push-Pull		No Watchdog-Adjustable Reset Input
Manual Reset		SOT/6
MAX6723Active Low
Open Drain		Extended Setup Period
Input (WDI)		1s to 2s
>2s		Adjustable Reset InputSOT/6
MAX6724Active Low
Push-Pull		Extended Setup Period
Input (WDI)		1s to 2s
>2s		Adjustable Reset InputSOT/6
MAX6725Active High
Active Low
Open Drain		Extended Setup Period
Input (WDI)		1s to 2s
>2s		Adjustable Reset Input
Manual Reset		SOT/8
MAX6726Active High
Active Low
Push-Pull		Extended Setup Period
Input (WDI)		1s to 2s
>2s		Adjustable Reset Input
Manual Reset		SOT/8
MAX6727Active Low
Open Drain		Extended Setup Period
Input (WDI)		1s to 2s
>2s		Adjustable Reset Input
Manual Reset		SOT/8
Related Products
  • MAX6708：Low-Voltage, SOT23, µP Supervisors with Power-Fail In/Out, Manual Reset, and Watchdog Timer
  • MAX6705：Low-Voltage, SOT23, µP Supervisors with Power-Fail In/Out, Manual Reset, and Watchdog Timer
  • MAX6706：Low-Voltage, SOT23, µP Supervisors with Power-Fail In/Out, Manual Reset, and Watchdog Timer
  • MAX6703：Low-Voltage, SOT23, µP Supervisors with Power-Fail In/Out, Manual Reset, and Watchdog Timer
  • MAX6704：Low-Voltage, SOT23, µP Supervisors with Power-Fail In/Out, Manual Reset, and Watchdog Timer
  • MAX6701：Low-Voltage, SOT23, µP Supervisors with Power-Fail In/Out, Manual Reset, and Watchdog Timer
  • MAX6702：Low-Voltage, SOT23, µP Supervisors with Power-Fail In/Out, Manual Reset, and Watchdog Timer
  • MAX6707：Low-Voltage, SOT23, µP Supervisors with Power-Fail In/Out, Manual Reset, and Watchdog Timer
  • MAX6828：Dual, Ultra-Low-Voltage SOT23 µP Supervisors with Manual Reset and Watchdog Timer
  • MAX6831：Dual, Ultra-Low-Voltage SOT23 µP Supervisors with Manual Reset and Watchdog Timer
  • MAX6829：Dual, Ultra-Low-Voltage SOT23 µP Supervisors with Manual Reset and Watchdog Timer
  • MAX6826：Dual, Ultra-Low-Voltage SOT23 µP Supervisors with Manual Reset and Watchdog Timer
  • MAX6827：Dual, Ultra-Low-Voltage SOT23 µP Supervisors with Manual Reset and Watchdog Timer
  • MAX6830：Dual, Ultra-Low-Voltage SOT23 µP Supervisors with Manual Reset and Watchdog Timer
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX6726KALTD1-TNo Longer AvailableSOT,;8 pin;9 mm²-40°C to +85°CNo
MAX6726KALTD2-TNo Longer AvailableSOT,;8 pin;9 mm²-40°C to +85°CNo
MAX6726KALTD3+ActiveSOT,;8 pin;9 mm²-40°C to +85°CLead Free
MAX6726KALTD3+TActiveSOT,;8 pin;9 mm²-40°C to +85°CLead Free
MAX6726KALTD3-TNo Longer AvailableMAX6726KALTD3+TSOT,;8 pin;9 mm²-40°C to +85°CNo
MAX6726KALTD4-TNo Longer AvailableSOT,;8 pin;9 mm²-40°C to +85°CNo
MAX6726KALTD5-TNo Longer AvailableSOT,;8 pin;9 mm²-40°C to +85°CNo
MAX6726KALTD6+TActiveSOT,;8 pin;9 mm²-40°C to +85°CLead Free
MAX6726KALTD6-TNo Longer AvailableSOT,;8 pin;9 mm²-40°C to +85°CNo
MAX6726KAMRD1-TNo Longer AvailableSOT,;8 pin;9 mm²-40°C to +85°CNo
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX6726KAMRD2-TNo Longer AvailableSOT,;8 pin;9 mm²-40°C to +85°CNo
MAX6726KAMRD3-TNo Longer AvailableSOT,;8 pin;9 mm²-40°C to +85°CNo
MAX6726KAMRD4-TNo Longer AvailableSOT,;8 pin;9 mm²-40°C to +85°CNo
MAX6726KAMRD5-TNo Longer AvailableSOT,;8 pin;9 mm²-40°C to +85°CNo
MAX6726KAMRD6-TNo Longer AvailableSOT,;8 pin;9 mm²-40°C to +85°CNo
MAX6726KAMSD1-TNo Longer AvailableSOT,;8 pin;9 mm²-40°C to +85°CNo
MAX6726KAMSD2-TNo Longer AvailableSOT,;8 pin;9 mm²-40°C to +85°CNo
MAX6726KAMSD3-TNo Longer AvailableSOT,;8 pin;9 mm²-40°C to +85°CNo
MAX6726KAMSD4-TNo Longer AvailableSOT,;8 pin;9 mm²-40°C to +85°CNo
MAX6726KAMSD5-TNo Longer AvailableSOT,;8 pin;9 mm²-40°C to +85°CNo
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX6726KAMSD6-TNo Longer AvailableSOT,;8 pin;9 mm²-40°C to +85°CNo
MAX6726KARDD1-TNo Longer AvailableSOT,;8 pin;9 mm²-40°C to +85°CNo
MAX6726KARDD2-TNo Longer AvailableSOT,;8 pin;9 mm²-40°C to +85°CNo
MAX6726KARDD3-TNo Longer AvailableSOT,;8 pin;9 mm²-40°C to +85°CNo
MAX6726KARDD4-TNo Longer AvailableSOT,;8 pin;9 mm²-40°C to +85°CNo
MAX6726KARDD5-TNo Longer AvailableSOT,;8 pin;9 mm²-40°C to +85°CNo
MAX6726KARDD6-TNo Longer AvailableSOT,;8 pin;9 mm²-40°C to +85°CNo
MAX6726KARFD1-TNo Longer AvailableSOT,;8 pin;9 mm²-40°C to +85°CNo
MAX6726KARFD2-TNo Longer AvailableSOT,;8 pin;9 mm²-40°C to +85°CNo
MAX6726KARFD3-TNo Longer AvailableSOT,;8 pin;9 mm²-40°C to +85°CNo
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX6726KARFD4-TNo Longer AvailableSOT,;8 pin;9 mm²-40°C to +85°CNo
MAX6726KARFD5-TNo Longer AvailableSOT,;8 pin;9 mm²-40°C to +85°CNo
MAX6726KARFD6-TNo Longer AvailableSOT,;8 pin;9 mm²-40°C to +85°CNo
MAX6726KARHD1-TNo Longer AvailableSOT,;8 pin;9 mm²-40°C to +85°CNo
MAX6726KARHD2-TNo Longer AvailableSOT,;8 pin;9 mm²-40°C to +85°CNo
MAX6726KARHD3-TNo Longer AvailableSOT,;8 pin;9 mm²-40°C to +85°CNo
MAX6726KARHD4-TNo Longer AvailableSOT,;8 pin;9 mm²-40°C to +85°CNo
MAX6726KARHD5-TNo Longer AvailableSOT,;8 pin;9 mm²-40°C to +85°CNo
MAX6726KARHD6-TNo Longer AvailableSOT,;8 pin;9 mm²-40°C to +85°CNo
MAX6726KARVD1-TNo Longer AvailableSOT,;8 pin;9 mm²-40°C to +85°CNo
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX6726KARVD2-TNo Longer AvailableSOT,;8 pin;9 mm²-40°C to +85°CNo
MAX6726KARVD3+TActiveSOT,;8 pin;9 mm²-40°C to +85°CLead Free
MAX6726KARVD3-TNo Longer AvailableSOT,;8 pin;9 mm²-40°C to +85°CNo
MAX6726KARVD4-TNo Longer AvailableSOT,;8 pin;9 mm²-40°C to +85°CNo
MAX6726KARVD5-TNo Longer AvailableSOT,;8 pin;9 mm²-40°C to +85°CNo
MAX6726KARVD6-TNo Longer AvailableSOT,;8 pin;9 mm²-40°C to +85°CNo
MAX6726KARYD1-TNo Longer AvailableSOT,;8 pin;9 mm²-40°C to +85°CNo
MAX6726KARYD2-TNo Longer AvailableSOT,;8 pin;9 mm²-40°C to +85°CNo
MAX6726KARYD3-TNo Longer AvailableSOT,;8 pin;9 mm²-40°C to +85°CNo
MAX6726KARYD4-TNo Longer AvailableSOT,;8 pin;9 mm²-40°C to +85°CNo
MAX6715-MAX6729.pdf MAX6727
MAX6715-MAX6729.pdf MAX6729
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