DS1221中文資料Nonvolatile Controller x 4 Chip數(shù)據(jù)手冊ADI規(guī)格書

描述 Description

DESCRIPTION
The DS1221 Nonvolatile Controller x 4 Chip is a CMOS circuit which solves the application problem of converting CMOS RAMs into nonvolatile memories. Incoming power is monitored for an out-of tolerance condition. When such a condition is detected, the chip enable outputs are inhibited to accomplish write protection and the battery is switched on to supply RAMs with uninterrupted power. An optional security code prevents unauthorized users from obtaining access to the memory space. The nonvolatile controller/decoder circuitry uses a low-leakage CMOS process which affords precise voltage detection at extremely low battery consumption. By combining the DS1221 with up to four CMOS memories and lithium batteries, nonvolatile operation can be achieved.FEATURES
■ Converts CMOS RAMs into nonvolatile memories
■ Data is automatically protected during power loss
■ 2-to-4 decoder provides for up to 4 CMOS RAMs
■ Provides for redundant batteries
■ Test battery condition on power-up
■ Full ±10% operating range
■ Unauthorized access can be prevented with optional security feature
■ 16-pin 0.3-inch DIP saves PC board space
■ Optional 16-pin SOIC surface mount package
■ Optional industrial temperature range of -40°C to +85°C available

特性 Features

■ Converts CMOS RAMs into nonvolatile memories
■ Data is automatically protected during power loss
■ 2-to-4 decoder provides for up to 4 CMOS RAMs
■ Provides for redundant batteries
■ Test battery condition on power-up
■ Full ±10% operating range
■ Unauthorized access can be prevented with optional security feature
■ 16-pin 0.3-inch DIP saves PC board space
■ Optional 16-pin SOIC surface mount package
■ Optional industrial temperature range of -40°C to +85°C available?

簡介

DS1221屬于集成電路（IC）的控制器。由ADI制造生產(chǎn)的DS1221控制器該系列產(chǎn)品主要用于在采用不同通信協(xié)議和/或信令方法的端點之間提供信息連接。示例包括將 I2C 總線連接到 UART，將 USB 連接到 I2C、SPI、以太網(wǎng)或 UART、以太網(wǎng) MAC 和 PHY 等的器件。此外，還包括用于通過為點對點通信設(shè)計的接口建立多路連接的器件，例如 USB 集線器控制器。