MAX6854:Nanopower µP Supervisory Circuits with Manual Reset and Watchdog Timer

Nanopower µP Supervisory Circuits with Manual Reset and Watchdog Timer Ideal for Portable Applications

The MAX6854/MAX6855/MAX6856/MAX6858/MAX6860–MAX6869 ultra-low-current (170nA, typ) microprocessor (µP) supervisory circuits combine voltage monitoring, watchdog timer, and manual reset input functions in a 5-pin SOT23 package. These devices assert a reset signal whenever the monitored voltage drops below the factory-trimmed reset threshold voltage, manual reset is asserted, or the watchdog timer expires. The reset output remains asserted for a minimum timeout period after VCC rises above the reset threshold and manual reset is deasserted. Factory-trimmed reset threshold voltages are offered from +1.575V to +4.625V in approximately 100mV increments (see the Threshold Suffix Guide in the full data sheet). Each device is offered with six minimum reset timeout options, ranging from 10ms to 1200ms. The MAX6854/MAX6855/MAX6856/MAX6858/MAX6860–MAX6869 are offered in a variety of configurations (see the Selector Guide in the full data sheet). The MAX6854/MAX6855/MAX6856/MAX6861–MAX6869 provide a manual reset input, MR-bar. The MAX6864–MAX6869 offer a watchdog timer that monitors activity at the WDI input to prevent code execution errors. The MAX6864–MAX6869 offer watchdog timeout options of 3.3s or 209s (typ). The MAX6861/MAX6862/MAX6863 feature a pin-selectable reset delay period of 10ms or 150ms (min). Push-pull active-low, push-pull active-high, and open-drain active-low reset outputs are available.

Key Features
  • Ultra-Low 170nA (typ) Supply Current
  • Reset Thresholds from +1.575V to +4.625V in Approximately 100mV Increments
  • Six Minimum Reset Timeout Period Options from 10ms to 1200ms
  • Manual Reset Option
  • Watchdog Timer Option
  • Pin-Selectable 10ms/150ms (min) Reset Timeout Period (MAX6861/MAX6862/MAX6863)
  • Immune to Short VCC Transients
  • Guaranteed Reset Valid to VCC = +1.1V
  • Three Reset Output Options:
    • Push-Pull active-low RESET
    • Push-Pull RESET
    • Open-Drain active-low RESET
  • No External Components
  • Small 5-Pin SOT23 Package
  • Pin Compatible to the TPS3836/TPS3837/TPS3838 (MAX6861/MAX6862/MAX6863)
MAX6854, MAX6855, MAX6856, MAX6858, MAX6860, MAX6861, MAX6862, MAX6863, MAX6864, MAX6865, MAX6866, MAX6867, MAX6868, MAX6869: Typical Operating Circuit
MAX6854, MAX6855, MAX6856, MAX6858, MAX6860, MAX6861, MAX6862, MAX6863, MAX6864, MAX6865, MAX6866, MAX6867, MAX6868, MAX6869: Typical Operating Circuit
Applications/Uses
  • Glucose Monitors/Patient Monitors
  • MP3 Players/Pagers
  • PDAs and Cell Phones
  • Portable Battery-Powered Equipment
DataSheet
titleDownload file
MAX6854-MAX6869 Data SheetMAX6854-MAX6869.pdf
Parametrics
Part NumberReset Thresh.
(V)
Reset OuttRESETWatchdog FeatureWatchdog TimeoutSupervisor FeaturesReset Thresh. Accur.
(%)
ICC
(µA)
Package/PinsBudgetary
Price
min@ +25°CmaxSee Notes
MAX68541.2 to 1.8
1.8 to 2.5
2.5 to 3.3
3.3 to 5.5
Active Low
Push-Pull
1ms to 15ms
15ms to 85ms
85ms to 300ms
300ms to 1s
No Watchdog-Manual Reset2.50.17SOT/5$1.76 @1k
MAX6856Active Low
Open Drain
1ms to 15ms
15ms to 85ms
85ms to 300ms
300ms to 1s
No Watchdog-Manual ResetSOT/5$1.76 @1k
MAX6858Active Low
Push-Pull
1ms to 15ms
15ms to 85ms
85ms to 300ms
300ms to 1s
No Watchdog--SOT/5$0.83 @10k
MAX6860Active Low
Open Drain
1ms to 15ms
15ms to 85ms
85ms to 300ms
300ms to 1s
No Watchdog--SOT/5$1.76 @1k
MAX6861Active Low
Push-Pull
1ms to 15ms
85ms to 300ms
No Watchdog-Manual ResetSOT/5$1.76 @1k
MAX6862Active High
Push-Pull
1ms to 15ms
85ms to 300ms
No Watchdog-Manual ResetSOT/5$1.76 @1k
MAX6863Active Low
Open Drain
1ms to 15ms
85ms to 300ms
No Watchdog-Manual ResetSOT/5$1.76 @1k
MAX6864Active Low
Push-Pull
1ms to 15ms
15ms to 85ms
85ms to 300ms
300ms to 1s
Input (WDI)>2sManual ResetSOT/5$1.48 @1k
MAX6866Active Low
Open Drain
1ms to 15ms
15ms to 85ms
85ms to 300ms
300ms to 1s
Input (WDI)>2sManual ResetSOT/5$1.48 @1k
MAX6867Active Low
Push-Pull
1ms to 15ms
15ms to 85ms
85ms to 300ms
300ms to 1s
Input (WDI)>2sManual ResetSOT/5$1.76 @1k
MAX6868Active High
Push-Pull
1ms to 15ms
15ms to 85ms
85ms to 300ms
300ms to 1s
Input (WDI)>2sManual ResetSOT/5$1.76 @1k
MAX6869Active Low
Open Drain
1ms to 15ms
15ms to 85ms
85ms to 300ms
300ms to 1s
Input (WDI)>2sManual ResetSOT/5$1.76 @1k
Quality and Environmental Data
Related Products
  • MAX6461:Ultra-Low-Power Voltage Detectors and µP Supervisory Circuits
  • MAX6427:Low-Power, Single/Dual-Level Battery Monitors with Hysteresis
  • MAX6404:µP Supervisory Circuits in 4-Bump (2 x 2) Chip-Scale Package
  • MAX6405:µP Supervisory Circuits in 4-Bump (2 x 2) Chip-Scale Package
  • MAX6402:µP Supervisory Circuits in 4-Bump (2 x 2) Chip-Scale Package
  • MAX6403:µP Supervisory Circuits in 4-Bump (2 x 2) Chip-Scale Package
  • MAX6400:µP Supervisory Circuits in 4-Bump (2 x 2) Chip-Scale Package
  • MAX6401:µP Supervisory Circuits in 4-Bump (2 x 2) Chip-Scale Package
  • MAX6346:3-Pin, Ultra-Low-Power SC70/SOT µP Reset Circuits
  • MAX6327:3-Pin, Ultra-Low-Power SC70/SOT µP Reset Circuits
  • MAX6328:3-Pin, Ultra-Low-Power SC70/SOT µP Reset Circuits
  • MAX6326:3-Pin, Ultra-Low-Power SC70/SOT µP Reset Circuits
  • MAX6347:3-Pin, Ultra-Low-Power SC70/SOT µP Reset Circuits
  • MAX6348:3-Pin, Ultra-Low-Power SC70/SOT µP Reset Circuits
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX6854UK16D1+TActiveSOT;-40°C to +85°CSee data sheet
MAX6854UK16D1-TNo Longer AvailableMAX6854UK16D1+SOT;-40°C to +85°CSee data sheet
MAX6854UK16D2+TActiveSOT;-40°C to +85°CSee data sheet
MAX6854UK16D2-TNo Longer AvailableMAX6854UK16D2+SOT;-40°C to +85°CSee data sheet
MAX6854UK16D3+ActiveSOT,;5 pin;9 mm²-40°C to +85°CLead Free
MAX6854UK16D3+TActiveSOT,;5 pin;9 mm²-40°C to +85°CLead Free
MAX6854UK16D3-TNo Longer AvailableMAX6854UK16D3+TSOT,;5 pin;9 mm²-40°C to +85°CNo
MAX6854UK16D4+TActiveSOT;-40°C to +85°CSee data sheet
MAX6854UK16D4-TNo Longer AvailableMAX6854UK16D4+SOT;-40°C to +85°CSee data sheet
MAX6854UK16D5+TActiveSOT;-40°C to +85°CSee data sheet
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX6854UK16D5-TNo Longer AvailableMAX6854UK16D5+SOT;-40°C to +85°CSee data sheet
MAX6854UK16D6+TActiveSOT;-40°C to +85°CSee data sheet
MAX6854UK16D6-TNo Longer AvailableMAX6854UK16D6+SOT;-40°C to +85°CSee data sheet
MAX6854UK17D1+TActiveSOT;-40°C to +85°CSee data sheet
MAX6854UK17D1-TNo Longer AvailableMAX6854UK17D1+SOT;-40°C to +85°CSee data sheet
MAX6854UK17D2+TActiveSOT;-40°C to +85°CSee data sheet
MAX6854UK17D2-TNo Longer AvailableMAX6854UK17D2+SOT;-40°C to +85°CSee data sheet
MAX6854UK17D3+TActiveSOT;-40°C to +85°CSee data sheet
MAX6854UK17D3-TNo Longer AvailableMAX6854UK17D3+SOT;-40°C to +85°CSee data sheet
MAX6854UK17D4+TActiveSOT;-40°C to +85°CSee data sheet
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX6854UK17D4-TNo Longer AvailableMAX6854UK17D4+SOT;-40°C to +85°CSee data sheet
MAX6854UK17D5+TActiveSOT;-40°C to +85°CSee data sheet
MAX6854UK17D5-TNo Longer AvailableMAX6854UK17D5+SOT;-40°C to +85°CSee data sheet
MAX6854UK17D6+TActiveSOT;-40°C to +85°CSee data sheet
MAX6854UK17D6-TNo Longer AvailableMAX6854UK17D6+SOT;-40°C to +85°CSee data sheet
MAX6854UK18D1+TActiveSOT;-40°C to +85°CSee data sheet
MAX6854UK18D1-TNo Longer AvailableMAX6854UK18D1+SOT;-40°C to +85°CSee data sheet
MAX6854UK18D2+TActiveSOT;-40°C to +85°CSee data sheet
MAX6854UK18D2-TNo Longer AvailableMAX6854UK18D2+SOT;-40°C to +85°CSee data sheet
MAX6854UK18D3+TActiveSOT;-40°C to +85°CSee data sheet
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX6854UK18D3-TNo Longer AvailableMAX6854UK18D3+SOT;-40°C to +85°CSee data sheet
MAX6854UK18D4+TActiveSOT;-40°C to +85°CSee data sheet
MAX6854UK18D4-TNo Longer AvailableMAX6854UK18D4+SOT;-40°C to +85°CSee data sheet
MAX6854UK18D5+TActiveSOT;-40°C to +85°CSee data sheet
MAX6854UK18D5-TNo Longer AvailableMAX6854UK18D5+SOT;-40°C to +85°CSee data sheet
MAX6854UK18D6+TActiveSOT;-40°C to +85°CSee data sheet
MAX6854UK18D6-TNo Longer AvailableMAX6854UK18D6+SOT;-40°C to +85°CSee data sheet
MAX6854UK19D1+ActiveSOT,;5 pin;9 mm²-40°C to +85°CLead Free
MAX6854UK19D1+TActiveSOT,;5 pin;9 mm²-40°C to +85°CLead Free
MAX6854UK19D1-TNo Longer AvailableMAX6854UK19D1+TSOT;-40°C to +85°CSee data sheet
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX6854UK19D2+TActiveSOT;-40°C to +85°CSee data sheet
MAX6854UK19D2-TNo Longer AvailableMAX6854UK19D2+SOT;-40°C to +85°CSee data sheet
MAX6854UK19D3+TActiveSOT;-40°C to +85°CSee data sheet
MAX6854UK19D3-TNo Longer AvailableMAX6854UK19D3+SOT;-40°C to +85°CSee data sheet
MAX6854UK19D4+TActiveSOT;-40°C to +85°CSee data sheet
MAX6854UK19D4-TNo Longer AvailableMAX6854UK19D4+SOT;-40°C to +85°CSee data sheet
MAX6854UK19D5+TActiveSOT;-40°C to +85°CSee data sheet
MAX6854UK19D5-TNo Longer AvailableMAX6854UK19D5+SOT;-40°C to +85°CSee data sheet
MAX6854UK19D6+TActiveSOT;-40°C to +85°CSee data sheet
MAX6854UK19D6-TNo Longer AvailableMAX6854UK19D6+SOT;-40°C to +85°CSee data sheet
MAX6854-MAX6869.pdf MAX6869
MAX6854.pdf MAX6854
典型工作电路 MAX6869