The APR3101/2/3 are designed to monitor voltage supplies in µP and digital systems. The quiescent current is extremely low, typically 1.5 µA, making it ideal for portable battery operated equipment. The APR3101/2/3 operate by monitoring the system power supply voltage. When the input voltage drops below a fixed threshold or whenever manual reset is asserted, the device asserts a reset signal for a fixed time period after Vcc rises above the fixed threshold or manual reset is deasserted. The APR3101/2/3 series is available with three output stage versions: APR3101 push-pull active low output, APR3102 push-pull active high output.
The APR3101/2/3 series are micro‑power reset circuits designed to monitor supply voltages in portable and battery‑operated digital systems. They provide a low‑quiescent‑current reset signal when the input voltage falls below a fixed threshold or when a manual reset is asserted, and they release the reset after a programmable timeout.
Key features include an input voltage range of 1.2 V to 6 V, selectable output configurations (open‑drain, CMOS active‑high, CMOS active‑low), a manual‑reset input, and a compact SOT‑23‑5 package. The datasheet lists detailed electrical characteristics, absolute maximum ratings, pin functions, and reliability test procedures.
| Input Voltage Range | 1.2 V to 6 V |
|---|---|
| Quiescent Current | < 1.5 µA |
| Reset Timeout Period | 250 ms |
| Package | SOT‑23‑5 |
| Operating Temperature Range | -40 °C to 85 °C |
| Maximum Supply Voltage (Voc) | -0.3 V to 6 V |
| Maximum Continuous Input Current | 20 mA |
The reset timeout period is 250 ms.
It is supplied in a SOT‑23‑5 surface‑mount package.
The device operates with an input voltage from 1.2 V to 6 V.
Open‑drain, CMOS active‑high, and CMOS active‑low outputs are available.