MAX708：Low-Cost, µP Supervisory Circuits
Low-Cost Reset + Watchdog ICs
The MAX705–MAX708/MAX813L microprocessor (µP) supervisory circuits reduce the complexity and number of components required to monitor power-supply and battery functions in µP systems. These devices significantly improve system reliability and accuracy compared to separate ICs or discrete components. The MAX705/MAX706/MAX813L provide four functions: A reset output during power-up, power-down, and brownout conditions. An independent watchdog output that goes low if the watchdog input has not been toggled within 1.6 seconds. A 1.25V threshold detector for power-fail warning, low-battery detection, or for monitoring a power supply other than +5V. An active-low manual-reset input. The MAX707/MAX708 are the same as the MAX705/MAX706, except an active-high reset is substituted for the watchdog timer. The MAX813L is the same as the MAX705, except RESET is provided instead of active-low RESET. Two supply-voltage monitor levels are available: The MAX705/MAX707/MAX813L generate a reset pulse when the supply voltage drops below 4.65V, while the MAX706/MAX708 generate a reset pulse below 4.40V. All four parts are available in 8-pin DIP, SO and µMAX® packages.
Key Features
| MAX705, MAX706, MAX707, MAX708, MAX813, MAX813L: Typical Operating Circuit Applications/Uses
|
DataSheet
| title | Download file |
|---|---|
| MAX705-MAX813L Data Sheet | MAX705-MAX813L.pdf |
Parametrics
| Part Number | Reset Thresh. (V) | Reset Out | tRESET | Watchdog Feature | Watchdog Timeout | Supervisor Features | Reset Thresh. Accur. (%) | ICC (µA) | Package/Pins | Budgetary Price |
|---|---|---|---|---|---|---|---|---|---|---|
| min | @ +25°C | max | See Notes | |||||||
| MAX705 | 3.3 to 5.5 | Active Low Push-Pull | 85ms to 300ms | Input (WDI) Input/Output (WDI/WDO) | 1s to 2s | Adjustable Reset Input Manual Reset Power Fail Comparator/Low Battery Detect | 2.5 | 350 | µMAX/8 CDIP(N)/8 PDIP(N)/8 SOIC(N)/8 | $2.78 @1k |
| MAX706 | Active Low Push-Pull | Input (WDI) Input/Output (WDI/WDO) | 1s to 2s | µMAX/8 CDIP(N)/8 PDIP(N)/8 SOIC(N)/8 | $1.82 @1k | |||||
| MAX707 | Active High Active Low Push-Pull | No Watchdog | - | µMAX/8 CDIP(N)/8 PDIP(N)/8 SOIC(N)/8 | $2.01 @1k | |||||
| MAX708 | Active High Active Low Push-Pull | No Watchdog | - | µMAX/8 CDIP(N)/8 PDIP(N)/8 SOIC(N)/8 | $1.82 @1k | |||||
Quality and Environmental Data
Related Products
- MAX6358：Dual/Triple-Voltage µP Supervisory Circuits
- MAX6359：Dual/Triple-Voltage µP Supervisory Circuits
- MAX6360：Dual/Triple-Voltage µP Supervisory Circuits
- MAX6318：5-Pin µP Supervisory Circuits with Watchdog and Manual Reset
- MAX6319：5-Pin µP Supervisory Circuits with Watchdog and Manual Reset
- MAX6317：5-Pin µP Supervisory Circuits with Watchdog and Manual Reset
- MAX6320：5-Pin µP Supervisory Circuits with Watchdog and Manual Reset
- MAX6316：5-Pin µP Supervisory Circuits with Watchdog and Manual Reset
- MAX6321：5-Pin µP Supervisory Circuits with Watchdog and Manual Reset
- MAX6322：5-Pin µP Supervisory Circuits with Watchdog and Manual Reset
Ordering Information
| Part Number | Status | Recommended Replacement | Package | Temp | RoHS |
|---|---|---|---|---|---|
| MAX708C/D | No Longer Available | MAX708C/D+ | DICE SALES,;NA pin;DICE; | 0°C to +70°C | See data sheet |
| MAX708C/D+ | Active | DICE SALES,;NA pin;DICE S; | -40°C to +85°C | See data sheet | |
| MAX708CPA | No Longer Available | MAX708CPA+ | PDIP(N),;8 pin;79.7 mm² | 0°C to +70°C | No |
| MAX708CPA+ | Active | PDIP(N),;8 pin;79.7 mm² | 0°C to +70°C | Lead Free | |
| MAX708CSA | No Longer Available | MAX708CSA+ | SOIC(N),;8 pin;30.9 mm² | 0°C to +70°C | No |
| MAX708CSA+ | Active | SOIC(N),;8 pin;30.9 mm² | 0°C to +70°C | Lead Free | |
| MAX708CSA+T | Active | SOIC(N),;8 pin;30.9 mm² | 0°C to +70°C | Lead Free | |
| MAX708CSA-T | No Longer Available | MAX708CSA+T | SOIC(N),;8 pin;30.9 mm² | 0°C to +70°C | No |
| MAX708CUA | No Longer Available | MAX708CUA+ | µMAX,;8 pin;15.6 mm² | 0°C to +70°C | No |
| MAX708CUA+ | Active | µMAX,;8 pin;15.6 mm² | 0°C to +70°C | Lead Free | |
| Part Number | Status | Recommended Replacement | Package | Temp | RoHS |
| MAX708CUA+T | Active | µMAX,;8 pin;15.6 mm² | 0°C to +70°C | Lead Free | |
| MAX708CUA-T | No Longer Available | MAX708CUA+T | µMAX,;8 pin;15.6 mm² | 0°C to +70°C | No |
| MAX708EPA | No Longer Available | MAX708EPA+ | PDIP(N),;8 pin;79.7 mm² | -40°C to +85°C | No |
| MAX708EPA+ | Active | PDIP(N),;8 pin;79.7 mm² | -40°C to +85°C | Lead Free | |
| MAX708ESA | No Longer Available | MAX708ESA+ | SOIC(N),;8 pin;30.9 mm² | -40°C to +85°C | No |
| MAX708ESA+ | Active | SOIC(N),;8 pin;30.9 mm² | -40°C to +85°C | Lead Free | |
| MAX708ESA+T | Active | SOIC(N),;8 pin;30.9 mm² | -40°C to +85°C | Lead Free | |
| MAX708ESA-T | No Longer Available | MAX708ESA+T | SOIC(N),;8 pin;30.9 mm² | -40°C to +85°C | No |
| MAX708ESA/GG8 | Active | SOIC(N),;8 pin;30.9 mm² | -40°C to +85°C | No | |
| MAX708EUA | No Longer Available | µMAX,;8 pin;15.6 mm² | -40°C to +85°C | No | |
| Part Number | Status | Recommended Replacement | Package | Temp | RoHS |
| MAX708EUA-T | No Longer Available | µMAX,;8 pin;15.6 mm² | -40°C to +85°C | No | |
| MAX708MJA | Active | CDIP(N),;8 pin;82.6 mm² | -55°C to +125°C | No | |
| MAX708MJA/883B | Active | CDIP(N),;8 pin;82.6 mm² | -55°C to +125°C | No | |
| MAX708MSA/PR | No Longer Available | SOIC(N),;8 pin;30.9 mm² | -55°C to +125°C | No | |
| MAX708MSA/PR+ | Active | SOIC(N),;8 pin;30.9 mm² | -55°C to +125°C | Lead Free | |
| MAX708MSA/PR-T | No Longer Available | SOIC(N),;8 pin;30.9 mm² | -55°C to +125°C | No |
- MAX705-MAX813L.pdf MAX708
- MAX708.pdf MAX708
- MAX705-MAX813L.pdf MAX813L
