The NCP803 is a low power system supervisor circuit designed to monitor VCC in digital systems and provide a reset signal to the host processor when necessary. No external components are required. The reset output is driven active within 10µsec of VCC falling through the reset voltage threshold. Reset is maintained active for a minimum of 140msec after VCC rises above the reset threshold. The NCP803 has an open drain active-low RESET output. The output of the NCP803 is guaranteed valid down to VCC = 1.0V and is available in a SOT-23 package. The NCP803 is optimized to reject fast transient glitches on the VCC line. Low supply current of 1.0µA (VCC = 3.2V) make this device suitable for battery powered applications.
The NCP803 provides precise Vcc monitoring and a reset signal for digital systems. It operates from 1.0 V to 5.5 V, requires no external components, and is supplied in a compact SOT‑23 package.
Typical applications include computers, embedded systems, battery‑powered equipment, and critical power‑supply monitoring. The device offers fast transient glitch rejection and a guaranteed minimum reset pulse of 140 ms.
| Supply Current (typical) | 1.0 µA at Vcc = 3.2 V |
|---|---|
| Minimum Reset Output Duration | 140 ms |
| Operating Temperature Range | -40 °C to +105 °C |
| Supply Voltage Range | 1.0 V to 5.5 V |
| Package | SOT‑23 (TO‑236) |
The typical supply current is 1.0 µA when Vcc is 3.2 V.
The reset output is guaranteed to stay active for a minimum of 140 ms.
The device is supplied in a SOT‑23 (TO‑236) plastic package.
It operates from –40 °C up to +105 °C.