DS2502-E48+ (MAXIM INTEGRATED PRODUCTS)

The DS2502-E48+ is a 48bit node address chip in 3 pin to 92 package. The add-only memory identifies and stores relevant information about the product to which it is associated. This lot or product specific information can be accessed with minimal interface for example, a single port pin of a microcontroller. It is a variant of the DS2502 1024bit add-only memory. It differs from the standard DS2502 in its custom ROM family code 89h and the UniqueWare identifier 5E7h in place of the upper 12 bits of the standard ROM serialization field. Data is transferred serially via the 1-wire protocol which requires only a single data lead and a ground return. The entire device can be programmed and then write-protected if desired. Alternatively, the part may be programmed multiple times with new data being appended to, but not overwriting, existing data with each subsequent programming of the device.