DS2502 is a 1024-bit EPROM with a unique 64-bit registration number, an integrated multidrop controller, and supports multiple data access methods. Each memory page can be permanently write-protected.
The DS2502 is a 1 Kb add‑only memory that communicates over a single data pin using Maxim’s 1‑Wire protocol. It provides a unique 64‑bit laser‑etched ROM, a 1024‑bit EPROM divided into four pages, and status bytes for write‑protect and page‑redirection functions. The device can be read directly from the 1‑Wire line, drawing power parasitically, while programming requires a 12 V pulse.
The manual covers pin assignments for various package types (TO‑92, SFN, SO, SOT‑23, TSOC, flip‑chip), ordering information, detailed command sequences for ROM and memory functions, and electrical characteristics such as operating voltage ranges and temperature limits. Revision history and package outlines are also provided.
| Memory size | 1024 bits (1 Kb) EPROM |
|---|---|
| EPROM pages | Four pages of 32 bytes each |
| Read voltage range | 2.8 V to 6.0 V |
| Programming voltage | 11.5 V to 12.0 V |
| Operating temperature | -40 °C to +85 °C |
| Family code | 8‑bit (09h) |
| Package options | TO‑92, SFN, 8‑pin SO, SOT‑23, TSOC, Flip‑Chip |
The DS2502 programs at 11.5 V to 12.0 V.
The EPROM is divided into four pages of 32 bytes each.
Read operations draw parasitic power from the 1‑Wire line within a 2.8 V to 6.0 V range.
No, bits can only be changed from logical 1 to logical 0.