DS12R885：带有恒压涓流充电器的RTC
DS12R885是一款与DS12885实时时钟(RTC)功能兼容的替代品。该器件提供RTC/日历、定时闹钟、三个可屏蔽的中断和一个通用中断输出、可编程方波以及114字节电池备份的静态RAM。少于31天的月份，月末日期可自动调整，其中包括闰年补偿。该器件还可以工作在24小时或带AM/PM指示的12小时格式。一个精密的温度补偿电路用来监视VCC的状态。如果检测到主电源故障，该器件可以自动切换到备用电源供电。VBACKUP引脚用于支持可充电电池或超级电容，内部包括一个始终有效的涓流充电器。DS12R885可以通过一个多路复用的单字节宽接口访问，该接口支持Intel和Motorola模式。DS12CR887和DS12R887将DS12R885与石英晶体和电池集成在一起。
关键特性
| DS12CR887、DS12R885、DS12R887：典型工作电路 应用
|
数据手册DataSheet
| 语言 | 下载文件 | 备注 |
|---|---|---|
| 英文 | DS12CR887-DS12R887.pdf | Rev 7; 10/2013 |
| 中文 | DS12CR887-DS12R887_cn.pdf | Rev 6; 10/2010 *数据资料已更新，阅读最新版本，请下载英文版。 |
关键参数
| Part Number | Interface | VSUPPLY (V) | Time Keeping Current (nA) | CL (pF) | Memory Type | Memory Size (Bytes) | Time of Day Alarms | Functions | Package/Pins | Budgetary Price |
|---|---|---|---|---|---|---|---|---|---|---|
| typ | See Notes | |||||||||
| DS12CR887 | Multiplexed |
| - | - | NV SRAM | 114 | 1 | RTC | EDIP/24 | $6.23 @1k |
| DS12R885 | 800 | 12.5 | SOIC(W)/24 | $1.80 @1k | ||||||
技术资料
- Tips for Writing Bulletproof Real-Time Clock Control Code
- State Machine Logic in Binary-Coded Decimal (BCD)-Formatted Real-Time Clocks
- Oscillator Design Considerations for Low-Current Applications
- Selecting a Backup Source for Real-Time Clocks
- Calculating ML Cell Life for an RTC Backup Operation
- Problems and Solutions for Adjusting to Changes in Daylight Saving Time
- Interface a Multiplexed-Bus Real-Time Clock to a µP With Separate Address and Data Buses
- Using the DS32kHz with Maxim Real-Time Clocks
- Using Multiplexed Bus Clocks with a Microcontroller
- Lithium Coin-Cell Batteries: Predicting an Application Lifetime
- Design Considerations for Maxim Real-Time Clocks
- Crystal Considerations with Maxim Real-Time Clocks (RTCs)
质量和环境数据
订购型号
| 型号 | 状况 | 推荐替代产品 | 封装 | 温度 | RoHS/无铅 |
|---|---|---|---|---|---|
| DS12R885S-33+ | 生产中 | SOIC(W),；24引脚；166.1mm² | -40°C至+85°C | RoHS/无铅：无铅 | |
| DS12R885S-33+T&R | 生产中 | SOIC(W),；24引脚；166.1mm² | -40°C至+85°C | RoHS/无铅：无铅 | |
| DS12R885S-5+ | 生产中 | SOIC(W),；24引脚；166.1mm² | -40°C至+85°C | RoHS/无铅：无铅 | |
| DS12R885S-5+T&R | 生产中 | SOIC(W),；24引脚；166.1mm² | -40°C至+85°C | RoHS/无铅：无铅 |
- DS12CR887-DS12R887.pdf DS12R885
- DS12CR887-DS12R887_cn.pdf DS12R885
- Tips for Writing Bulletproof Real-Time Clock Control Code DS3234
- State Machine Logic in Binary-Coded Decimal (BCD)-Formatted Real-Time Clocks DS3234
- Oscillator Design Considerations for Low-Current Applications DS17885
- Selecting a Backup Source for Real-Time Clocks DS3234
- Calculating ML Cell Life for an RTC Backup Operation DS12R885
- Problems and Solutions for Adjusting to Changes in Daylight Saving Time DS17887
- Interface a Multiplexed-Bus Real-Time Clock to a µP With Separate Address and Data Buses DS17887
- Using the DS32kHz with Maxim Real-Time Clocks DS17885
- Using Multiplexed Bus Clocks with a Microcontroller DS17887
- Lithium Coin-Cell Batteries: Predicting an Application Lifetime DS9034PCX
- Design Considerations for Maxim Real-Time Clocks DS3234
- Crystal Considerations with Maxim Real-Time Clocks (RTCs) DS3234
- DS12R885.pdf DS12R885
- DS12CR887-DS12R887_cn.pdf DS12R885
