DS1251：4096k NV SRAM，带有隐含时钟
具有隐含时钟的DS1251 4096k NV SRAM为全静态非易失RAM (按照8位、512k字排列)，内置实时时钟。DS1251Y自带锂电池及控制电路，控制电路连续监视VCC是否超出容差范围，一旦超出容差，锂电池便自动切换至供电状态，写保护将无条件使能、以防存储器和实时时钟数据被破坏。 隐含时钟提供百分之一秒、秒、分、时、星期、日、月、年等时间信息。对少于31天的月份，月终日期可自动调节，包括对闰年的修正。隐含时钟格式可配置为24小时制或配合AM/PM指示的12小时制。
关键特性
| DS1251、DS1251P：引脚配置 |
数据手册DataSheet
| 语言 | 下载文件 | 备注 |
|---|---|---|
| 英文 | DS1251-DS1251P.pdf | Rev 3; 01/2012 |
关键参数
| Part Number | Interface | VSUPPLY (V) | Memory Type | Memory Size (Bytes) | Time of Day Alarms | Functions | Package/Pins | Budgetary Price |
|---|---|---|---|---|---|---|---|---|
| See Notes | ||||||||
| DS1251 |
|
| NV SRAM | 512K | 0 | RTC |
| $22.19 @1k |
技术资料
- Tips for Writing Bulletproof Real-Time Clock Control Code
- How to Replace a DS1216 SmartSocket with an Equivalent-Density Phantom Clock Module
- State Machine Logic in Binary-Coded Decimal (BCD)-Formatted Real-Time Clocks
- Using the SmartWatch/Phantom Clocks with a Microcontroller
- PowerCap Package Allows for Density Upgrades, Surface Mount Assembly
- Lithium Coin-Cell Batteries: Predicting an Application Lifetime
- Design Considerations for Maxim Real-Time Clocks
- Using the Dallas Phantom Real-Time Clocks (RTCs)
质量和环境数据
相关产品
- DS9034PCX：PowerCap，带有晶振
订购型号
| 型号 | 注 | 状况 | 推荐替代产品 | 封装 | 温度 | RoHS/无铅 |
|---|---|---|---|---|---|---|
| DS1251W-120+ | 生产中 | EDIP,；32引脚；707.2mm² | 0°C至+70°C | RoHS/无铅：无铅 | ||
| DS1251W-120IND+ | 生产中 | EDIP,；32引脚；707.2mm² | -40°C至+85°C | RoHS/无铅：无铅 | ||
| DS1251WP-120 | 3.3V、120ns | 停止供货 | DS1251WP-120+ | PCAP,；34引脚；596.9mm² | 0°C至+70°C | 参考数据资料 |
| DS1251WP-120+ | 生产中 | PCAP,；34引脚；596.9mm² | 0°C至+70°C | RoHS/无铅：无铅 | ||
| DS1251WP-120IND+ | 生产中 | PCAP,；34引脚；596.9mm² | -40°C至+85°C | RoHS/无铅：无铅 | ||
| DS1251Y-70 | 5V、70ns | 停止供货 | DS1251Y-70+ | EDIP,；32引脚；707.2mm² | 0°C至+70°C | 参考数据资料 |
| DS1251Y-70+ | 生产中 | EDIP,；32引脚；707.2mm² | 0°C至+70°C | RoHS/无铅：无铅 | ||
| DS1251YP-70 | 停止供货 | DS1251YP-70+ | PCAP,；34引脚；596.9mm² | 0°C至+70°C | 参考数据资料 | |
| DS1251YP-70+ | 生产中 | PCAP,；34引脚；596.9mm² | 0°C至+70°C | RoHS/无铅：无铅 | ||
| DS1251YP-70IND | 停止供货 | DS1251YP-70IND+ | PCAP,；34引脚；596.9mm² | -40°C至+85°C | 参考数据资料 | |
| 型号 | 注 | 状况 | 推荐替代产品 | 封装：类型 引脚 占位面积封装图 编码/变更 * | 温度 | RoHS/无铅？ |
| DS1251YP-70IND+ | 生产中 | PCAP,；34引脚；596.9mm² | -40°C至+85°C | RoHS/无铅：无铅 |
- DS1251-DS1251P.pdf DS1251
- Tips for Writing Bulletproof Real-Time Clock Control Code DS3234
- How to Replace a DS1216 SmartSocket with an Equivalent-Density Phantom Clock Module DS1251
- State Machine Logic in Binary-Coded Decimal (BCD)-Formatted Real-Time Clocks DS3234
- Using the SmartWatch/Phantom Clocks with a Microcontroller DS1315
- PowerCap Package Allows for Density Upgrades, Surface Mount Assembly DS9034PCX
- Lithium Coin-Cell Batteries: Predicting an Application Lifetime DS9034PCX
- Design Considerations for Maxim Real-Time Clocks DS3234
- Using the Dallas Phantom Real-Time Clocks (RTCs) DS1315
- DS1251.pdf DS1251
- DS1251-DS1251P.pdf DS1251
