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Voltage Supervisors 
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MAX16056
125nA nanoPower Supervisory Circuits with Capacitor-Adjustable Reset and Watchdog Timeouts
Capacitor-Adjustable Nanopower Supervisory Circuits
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Key Features
Applications/Uses
Parametric specs for Supervisors (1 Monitored Voltage)
| Reset Thresh. (V) | 1.2 to 1.8 1.8 to 2.5 2.5 to 3.3 3.3 to 5.5 |
| Reset Thresh. Accur. (%) (@ +25°C) | 2.5 |
| Reset Out | Active Low Push-Pull |
| tRESET (min) | Adjustable |
| Watchdog Feature | Cap Adjustable Input (WDI) |
| Watchdog Timeout | Adjustable |
| Supervisor Features | Manual Reset |
| ICC (µA) (max) | 0.125 |
| Package/Pins | TDFN/8 |
| Budgetary Price (See Notes) | 2.47 |
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Parameters
Parametric specs for Supervisors (1 Monitored Voltage)
| Reset Thresh. (V) | 1.2 to 1.8 1.8 to 2.5 2.5 to 3.3 3.3 to 5.5 |
| Reset Thresh. Accur. (%) (@ +25°C) | 2.5 |
| Reset Out | Active Low Push-Pull |
| tRESET (min) | Adjustable |
| Watchdog Feature | Cap Adjustable Input (WDI) |
| Watchdog Timeout | Adjustable |
| Supervisor Features | Manual Reset |
| ICC (µA) (max) | 0.125 |
| Package/Pins | TDFN/8 |
| Budgetary Price (See Notes) | 2.47 |
Key Features
- Reduced Power Requirements
- Ultra-Low 125nA (typ) Supply Current
- 1.1V to 5.5V Operating Supply Range
- Configurable Circuit Enables Flexible Designs
- Factory-Set Reset Threshold Options from 1.575V to 4.625V in Approximately 100mV Increments
- Capacitor-Adjustable Reset Timeout
- Capacitor-Adjustable Watchdog Timeout (MAX16056/MAX16058)
- Watchdog Timer Capacitor Open Detect Function
- Optional Watchdog Disable Function (MAX16056/MAX16058)
- Manual-Reset Input
- Push-Pull or Open-Drain Active-Low RESET Output Options
- Integrated Features Increases System Robustness
- Power-Supply Transient Immunity
- Guaranteed Active-Low RESET Valid for VCC ≥ 1.1V
- Saves Board Space
- 3mm x 3mm TDFN Package
Applications/Uses
- Glucose Monitors/Patient Monitors
- Metering/HVAC
- MP3 Players/Pagers
- PDAs/Cell Phones
- Portable/Battery-Powered Equipment
Description
The MAX16056–MAX16059 are ultra-low-current 125nA (typ) microprocessor (µP) supervisory circuits that monitor a single system supply voltage. These devices assert an active-low reset signal whenever the VCC supply voltage drops below the factory trimmed reset threshold, manual reset is pulled low, or the watchdog timer runs out (MAX16056/MAX16058). The reset output remains asserted for an adjustable reset timeout period after VCC rises above the reset threshold. Factory-trimmed reset threshold voltages are offered from 1.575V to 4.625V in approximately 100mV increments (see Table 1 in the full data sheet).
These devices feature adjustable reset and watchdog timeout using external capacitors. The MAX16056/MAX16058 contain a watchdog timer with a watchdog select input (WDS) that multiplies the watchdog timeout period by 128. The MAX16057/MAX16059 do not have the watchdog feature.
The MAX16056–MAX16059 are available in either push-pull or open-drain output-type configurations (see the Ordering Information in the full data sheet). These devices are fully specified over the -40°C to +125°C automotive temperature range. The MAX16056/MAX16058 are available in the 8-pin TDFN package, and the MAX16057/MAX16059 are available in the 6-pin TDFN package.
These devices feature adjustable reset and watchdog timeout using external capacitors. The MAX16056/MAX16058 contain a watchdog timer with a watchdog select input (WDS) that multiplies the watchdog timeout period by 128. The MAX16057/MAX16059 do not have the watchdog feature.
The MAX16056–MAX16059 are available in either push-pull or open-drain output-type configurations (see the Ordering Information in the full data sheet). These devices are fully specified over the -40°C to +125°C automotive temperature range. The MAX16056/MAX16058 are available in the 8-pin TDFN package, and the MAX16057/MAX16059 are available in the 6-pin TDFN package.
Technical Docs
Support & Training
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Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .
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