MAX698：Low-Cost, Power-On Reset and Watchdog Controllers
The MAX698/MAX699 monitor the +5V supply in microprocessor (µP) and digital systems. They supply a active-low RESET pulse of at least 140ms duration on power-up, power-down, and during low-voltage brownout conditions. Circuit reliability is increased at reduced cost by eliminating all external components and adjustments. The MAX699 includes all features of the MAX698, but also provides a watchdog input to monitor microprocessor activity. The active-low RESET output goes low if the watchdog input (WDI) is not toggled within 1 second. The watchdog feature can be disabled by leaving WDI open. Both parts are supplied in 8-lead PDIP and 16-lead 0.3in wide small outline (SO) packages and are specified from 0°C to +70°C for C grade devices and -40°C to +85°C for E devices. The SO versions, with more pins than the 8-lead PDIP, have additional outputs not available in DIP packages. These are RESET (without inversion) and watchdog output (active-low WDO).
Key Features
| MAX698, MAX699: Typical Operating Circuit Applications/Uses
|
DataSheet
| title | Download file |
|---|---|
| MAX698-MAX699 Data Sheet | MAX698-MAX699.pdf |
Parametrics
| Part Number | Reset Thresh. (V) | Reset Out | tRESET | Watchdog Feature | Watchdog Timeout | Reset Thresh. Accur. (%) | ICC (µA) | Package/Pins | Budgetary Price |
|---|---|---|---|---|---|---|---|---|---|
| min | @ +25°C | max | See Notes | ||||||
| MAX698 | 3.3 to 5.5 | Active High Active Low Open Drain Push-Pull | 85ms to 300ms | No Watchdog | - | 2.5 | 5000 | PDIP(N)/8 SOIC(W)/16 | $2.33 @1k |
| MAX699 | Input (WDI) Input/Output (WDI/WDO) | 1s to 2s | PDIP(N)/8 SOIC(W)/16 | $2.23 @1k | |||||
Related Products
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- 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 |
|---|---|---|---|---|---|
| MAX698CPA | No Longer Available | MAX698CPA+ | PDIP(N),;8 pin;79.7 mm² | 0°C to +70°C | No |
| MAX698CPA+ | Active | PDIP(N),;8 pin;79.7 mm² | 0°C to +70°C | Lead Free | |
| MAX698CPA-4 | Active | MAX698CPA | PDIP(N),;8 pin;79.7 mm² | 0°C to +70°C | No |
| MAX698CWE | No Longer Available | MAX698CWE+ | SOIC(W),;16 pin;111.8 mm² | 0°C to +70°C | No |
| MAX698CWE+ | Active | SOIC(W),;16 pin;111.8 mm² | 0°C to +70°C | Lead Free | |
| MAX698CWE+T | Active | SOIC(W),;16 pin;111.8 mm² | 0°C to +70°C | Lead Free | |
| MAX698CWE-T | No Longer Available | MAX698CWE+T | W.SO;16 pin | 0°C to +70°C | See data sheet |
| MAX698EPA | No Longer Available | MAX698EPA+ | PDIP(N),;8 pin;79.7 mm² | -40°C to +85°C | No |
| MAX698EPA+ | Active | PDIP(N),;8 pin;79.7 mm² | -40°C to +85°C | Lead Free | |
| MAX698EWE | No Longer Available | MAX698EWE+ | SOIC(W),;16 pin;111.8 mm² | -40°C to +85°C | No |
| Part Number | Status | Recommended Replacement | Package | Temp | RoHS |
| MAX698EWE+ | Active | SOIC(W),;16 pin;111.8 mm² | -40°C to +85°C | Lead Free | |
| MAX698EWE+T | Active | SOIC(W),;16 pin;111.8 mm² | -40°C to +85°C | Lead Free | |
| MAX698EWE-T | No Longer Available | MAX698EWE+T | W.SO;16 pin | -40°C to +85°C | See data sheet |
- MAX698-MAX699.pdf MAX699
- MAX698-MAX699.pdf MAX699
