The DS1811 EconoReset is a low-cost, high-precision power monitor IC that can detect power failures in a microprocessor system and automatically restart the microprocessor. It features a 5V open-drain output with an internal 5.5 kΩ pull-up resistor.
The Dallas DS1811 EconoReset is a power‑monitoring chip that automatically restarts a microprocessor after a power failure. It detects out‑of‑tolerance VCC conditions, asserts an active‑low reset output, and holds the reset for about 150 ms once VCC returns to a normal range, allowing the system to stabilize.
The device is offered in low‑cost TO‑92 and space‑saving SOT‑23 packages, features an open‑drain output with an internal 5.5 kΩ pull‑up, and includes a precision temperature‑compensated voltage reference. Detailed electrical characteristics, pin assignments, timing diagrams, and absolute maximum ratings are provided for design reference.
| Supply Voltage (VCC) | 0.0 – 5.5 V |
|---|---|
| Operating Temperature | -40 °C to +85 °C |
| Output Current (IOL) | +10 mA |
| RST Active Time | 100 – 300 ms (typ 150 ms) |
| VCC Trip Point (DS1811‑5) | 4.50 – 4.75 V (typ 4.62 V) |
The reset signal is kept active for approximately 150 ms after VCC returns to an in‑tolerance condition.
The DS1811 is offered in low‑cost TO‑92 and space‑saving SOT‑23 packages.
The absolute maximum rating for VCC is –0.5 V to +7.0 V relative to ground.
The device can source up to +10 mA at 0.4 V on the reset output.