Features: *Precise monitoring of 2.5V, 3.3V, and 5V supply voltages*Fully specified over temperatureIndustrial: −40˚C to +85˚CExtended: −40˚C to +125˚C*100 ms minimum Power-On Reset pulse width, 190 ms ypical:Active-Low RESET Output (LM3722)Active-High RESET Output ...
LM3724: Features: *Precise monitoring of 2.5V, 3.3V, and 5V supply voltages*Fully specified over temperatureIndustrial: −40˚C to +85˚CExtended: −40˚C to +125˚C*100 ms minimum...
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| Power on Reset | Yes |
| Watchdog | No |
| Power Fail Input | No |
| Manual Reset | Yes |
| Reset Timeout Period | 190 ms |
| On/Off Pin | Yes |
| Error Flag | Yes |
| Input Min Voltage | 1 Volt |
| Input Max Voltage | 6 Volt |
| Output Current | 20 mA |
| RegType | Supervisor |
| Temperature Min | -40 deg C |
| Temperature Max | 125 deg C |
| Voltage Supervised | 2.5 Volt |
| View Using Catalog | |
The LM3722/LM3723/LM3724 microprocessor supervisory circuits monitor the power supplies in microprocessor and digital systems. They provide a reset to the microprocessor during power-up, power-down, brown-out conditions, and manual reset.
The LM3722/LM3723/LM3724 asserts a reset signal whenever the supply decreases below the factory-programmed reset threshold for at least 100 ms. The reset signal remains asserted for 190 ms after VCC rises above the threshold.
The LM3722 has an active-low RESET push-pull output. The LM3723 has an active-high RESET push-pull output. The LM3724 has an active-low open-drain RESET output.
Three standard reset voltage options are available, suitable for monitoring 5V, 3.3V, and 2.5V supply voltages. Additional reset voltages are also available; contact National Semiconductor for details.
With a low supply current of only 6µA,the LM3722/LM3723/LM3724 are ideal for use in portable equipment. The LM3722/LM3723/LM3724 are available in the 5-pin SOT23 package.