The DS28EA00 is a 1‑Wire digital thermometer that offers 9‑ to 12‑bit temperature resolution (0.5 °C to 0.0625 °C) and programmable alarm thresholds. It features two general‑purpose I/O pins that can be used for sequence‑detect or as regular I/O, and it can be powered parasitically from the data line, removing the need for an external supply.
The device is supplied in an 8‑pin SOP package, operates from 3.0 V to 5.5 V, and includes a unique 64‑bit registration number for each unit. Detailed electrical characteristics, pin descriptions, memory map, and communication examples are provided for designers.
| Temperature range | -40°C to +85°C |
|---|---|
| Resolution | 9‑ to 12‑bit |
| Unique registration number | 64‑bit |
| PIO pins | 2 general‑purpose programmable I/O pins |
Resolution is user selectable from 9‑bit (0.5 °C) up to 12‑bit (0.0625 °C).
The device includes two general‑purpose programmable I/O pins that can be used for sequence‑detect or as regular I/O.