Maxim Integrated MicroMonitor™ series, DS1819AR-5+T&R, Type Simple Reset/Power-On Reset, Reset Active Low, Output Push-Pull/Totem Pole, Voltage Threshold 3.075V, Reset Timeout 140ms Min, Operating Temperature -40°C to 85°C, Package SOT-23-5.
| Parameter | Value |
|---|---|
| Type | Simple Reset/Power-On Reset |
| Series | MicroMonitor™ |
| Mounting | Surface Mount |
| Voltage - threshold | 3.075V |
| Number of voltages monitored | 1 |
| Operating temperature | -40°C ~ 85°C (TA) |
| Reset | Active Low |
| Output | Push-Pull, Totem Pole |
| Package | Tape & Reel (TR); Cut Tape (CT) |
| Reset timeout | 140ms Minimum |
| Case | SC-74A, SOT-753 |
That duration is typical for many MCUs and SoCs; if your part needs a longer or shorter delay, the timeout here is fixed and not adjustable. For designs that need a custom delay, a supervisor with an external timing capacitor would be the alternative.
The SOT-23-5 package is small enough to place close to the monitored rail without crowding the layout.
The reset timeout is a minimum of 140ms after the supply rail rises above the 3.075V threshold. This fixed delay covers typical MCU power-up settling.
The DS1819AR-5+T&R is an active part with no official successor listed. For a second source, look for pin-compatible supervisors from other vendors with the same SOT-23-5 footprint, 3.075V threshold, and active-low push-pull output — but confirm the reset timeout matches your timing budget.
It is a Simple Reset/Power-On Reset supervisor. It monitors a single voltage rail and asserts a reset signal during power-up and brownout conditions.