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DS2505為16k位只添加存儲器，可以識別和存儲與產品相關的信息。此篇主要介紹了DS2505 特性、應用范圍、參考設計電路以及電路分析，幫助大家縮短設計時間。

DS2505特性：16384位電可編程只讀存儲器(EPROM);內置多點控制器;將控制線、地址線、數據線、電源和可編程信號線集于一條總線;直接與微處理器的一個口線連接、通信速率可達16.3kbps

DS2505典型應用范圍：配件與外設識別;醫用傳感器鑒定與校準;網絡節點識別

DS2505參考設計應用電路：

圖1 DS2505內部結構圖

The DS2505 16k bits 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.

圖2 DS2505參考設計圖

The DS2505 has three main data components: 1) 64–bit lasered ROM, 2) 16384–bits EPROM Data Memory, and 3) 704–bits EPROM Status Memory.The device derives its power for read operations entirely from the 1–Wire communication line by storing energy on an internal capacitor during periods of time when the signal line is high and continues to operate off of this “parasite” power source during the low times of the 1–Wire line until it returns high to replenish the parasite (capacitor) supply.