MAX6722：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
MAX6722UTLTD1-TNo Longer AvailableSOT,;6 pin;9 mm²-40°C to +85°CNo
MAX6722UTLTD2-TNo Longer AvailableSOT,;6 pin;9 mm²-40°C to +85°CNo
MAX6722UTLTD3+TActiveSOT,;6 pin;9 mm²-40°C to +85°CLead Free
MAX6722UTLTD3-TNo Longer AvailableMAX6722UTLTD3+TSOT,;6 pin;9 mm²-40°C to +85°CNo
MAX6722UTLTD4-TNo Longer AvailableSOT,;6 pin;9 mm²-40°C to +85°CNo
MAX6722UTLTD5-TNo Longer AvailableSOT,;6 pin;9 mm²-40°C to +85°CNo
MAX6722UTLTD6-TNo Longer AvailableSOT,;6 pin;9 mm²-40°C to +85°CNo
MAX6722UTMRD1-TNo Longer AvailableSOT,;6 pin;9 mm²-40°C to +85°CNo
MAX6722UTMRD2-TNo Longer AvailableSOT,;6 pin;9 mm²-40°C to +85°CNo
MAX6722UTMRD3-TNo Longer AvailableSOT,;6 pin;9 mm²-40°C to +85°CNo
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX6722UTMRD4-TNo Longer AvailableSOT,;6 pin;9 mm²-40°C to +85°CNo
MAX6722UTMRD5-TNo Longer AvailableSOT,;6 pin;9 mm²-40°C to +85°CNo
MAX6722UTMRD6-TNo Longer AvailableSOT,;6 pin;9 mm²-40°C to +85°CNo
MAX6722UTMSD1-TNo Longer AvailableSOT,;6 pin;9 mm²-40°C to +85°CNo
MAX6722UTMSD2-TNo Longer AvailableSOT,;6 pin;9 mm²-40°C to +85°CNo
MAX6722UTMSD3-TNo Longer AvailableSOT,;6 pin;9 mm²-40°C to +85°CNo
MAX6722UTMSD4-TNo Longer AvailableSOT,;6 pin;9 mm²-40°C to +85°CNo
MAX6722UTMSD5-TNo Longer AvailableSOT,;6 pin;9 mm²-40°C to +85°CNo
MAX6722UTMSD6-TNo Longer AvailableSOT,;6 pin;9 mm²-40°C to +85°CNo
MAX6722UTRDD1-TNo Longer AvailableSOT,;6 pin;9 mm²-40°C to +85°CNo
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX6722UTRDD2-TNo Longer AvailableSOT,;6 pin;9 mm²-40°C to +85°CNo
MAX6722UTRDD3-TNo Longer AvailableSOT,;6 pin;9 mm²-40°C to +85°CNo
MAX6722UTRDD4-TNo Longer AvailableSOT,;6 pin;9 mm²-40°C to +85°CNo
MAX6722UTRDD5-TNo Longer AvailableSOT,;6 pin;9 mm²-40°C to +85°CNo
MAX6722UTRDD6-TNo Longer AvailableSOT,;6 pin;9 mm²-40°C to +85°CNo
MAX6722UTRFD1-TNo Longer AvailableSOT,;6 pin;9 mm²-40°C to +85°CNo
MAX6722UTRFD2-TNo Longer AvailableSOT,;6 pin;9 mm²-40°C to +85°CNo
MAX6722UTRFD3-TNo Longer AvailableSOT,;6 pin;9 mm²-40°C to +85°CNo
MAX6722UTRFD4-TNo Longer AvailableSOT,;6 pin;9 mm²-40°C to +85°CNo
MAX6722UTRFD5-TNo Longer AvailableSOT,;6 pin;9 mm²-40°C to +85°CNo
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX6722UTRFD6-TNo Longer AvailableSOT,;6 pin;9 mm²-40°C to +85°CNo
MAX6722UTRHD1-TNo Longer AvailableSOT,;6 pin;9 mm²-40°C to +85°CNo
MAX6722UTRHD2-TNo Longer AvailableSOT,;6 pin;9 mm²-40°C to +85°CNo
MAX6722UTRHD3-TNo Longer AvailableSOT,;6 pin;9 mm²-40°C to +85°CNo
MAX6722UTRHD4-TNo Longer AvailableSOT,;6 pin;9 mm²-40°C to +85°CNo
MAX6722UTRHD5-TNo Longer AvailableSOT,;6 pin;9 mm²-40°C to +85°CNo
MAX6722UTRHD6-TNo Longer AvailableSOT,;6 pin;9 mm²-40°C to +85°CNo
MAX6722UTRVD1-TNo Longer AvailableSOT,;6 pin;9 mm²-40°C to +85°CNo
MAX6722UTRVD2-TNo Longer AvailableSOT,;6 pin;9 mm²-40°C to +85°CNo
MAX6722UTRVD3+TActiveSOT,;6 pin;9 mm²-40°C to +85°CLead Free
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX6722UTRVD3-TNo Longer AvailableSOT,;6 pin;9 mm²-40°C to +85°CNo
MAX6722UTRVD4-TNo Longer AvailableSOT,;6 pin;9 mm²-40°C to +85°CNo
MAX6722UTRVD5-TNo Longer AvailableSOT,;6 pin;9 mm²-40°C to +85°CNo
MAX6722UTRVD6-TNo Longer AvailableSOT,;6 pin;9 mm²-40°C to +85°CNo
MAX6722UTRYD1-TNo Longer AvailableSOT,;6 pin;9 mm²-40°C to +85°CNo
MAX6722UTRYD2-TNo Longer AvailableSOT,;6 pin;9 mm²-40°C to +85°CNo
MAX6722UTRYD3-TNo Longer AvailableSOT,;6 pin;9 mm²-40°C to +85°CNo
MAX6722UTRYD4-TNo Longer AvailableSOT,;6 pin;9 mm²-40°C to +85°CNo
MAX6722UTRYD5-TNo Longer AvailableSOT,;6 pin;9 mm²-40°C to +85°CNo
MAX6722UTRYD6-TNo Longer AvailableSOT,;6 pin;9 mm²-40°C to +85°CNo
MAX6715-MAX6729.pdf MAX6727
MAX6715-MAX6729.pdf MAX6729
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