This document describes the features of the SMS1242 microprocessor supervisory circuit, including supply voltage monitoring, reset output, 1.25V threshold detector, manual reset input and 16k-bits of nonvolatile memory.
The SMS1242 is a microprocessor supervisory circuit designed to monitor supply voltages in +5V, +3V, and +2.5V systems. It provides reset outputs during power-up, power-down, and brown-out conditions, featuring two independent voltage monitors and an active low manual reset input.
| Operating supply voltage range (Option A) | 4.375V to 4.475V |
|---|---|
| Reset threshold (Option D) | 2.450V typical |
| Vsense input threshold | 1.25V +/- 1% |
| Reset delay time (Ti) | 150ms nominal |
| Nonvolatile memory size | 16k-bits |
The device has a nominal reset delay of 150ms.
Yes, it includes 16k-bits of nonvolatile memory accessible via a serial interface.
The Vsense input has a fixed threshold of 1.25V with +/- 1% tolerance.