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参数资料
| 型号： | DS1254WB-150 |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 14/17页 |
| 文件大小： | 0K |
| 描述： | IC NVSRAM 16MBIT 150NS 168BGA |
| 标准包装： | 1 |
| 类型： | Phantom 计时芯片 |
| 特点： | 闰年，NVSRAM |
| 存储容量： | 2MB |
| 时间格式： | HH:MM:SS:hh（12/24 小时） |
| 数据格式： | YY-MM-DD-dd |
| 接口： | 并联 |
| 电源电压： | 3 V ~ 3.7 V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 168-BGA |
| 供应商设备封装： | 168-BGA（40x40） |
| 包装： | 托盘 |
DS1254
6 of 17
AM/PM/12/24 MODE
Bit 7 of the hours register is defined as the 12-hour or 24-hour mode select bit. When high, the 12-hour mode is
selected. In the 12-hour mode, bit 5 is the AM/PM bit with logic high being PM. In the 24-hour mode, bit 5 is the
second 10-hour bit (20–23 hours).
OSCILLATOR BIT
Bit 5 of the day register controls the oscillator. When set to logic 1, the oscillator is off. When set to logic 0, the
oscillator turns on and the watch becomes operational.
ZERO BITS
Registers 1, 2, 3, 4, 5, and 6 contain one or more bits that will always read logic 0. When writing these locations,
either a logic 1 or logic 0 is acceptable.
BATTERY MONITORING
The DS1254 automatically monitors the battery in an attached DS3800 battery cap on a 24-hour time interval. Such
monitoring begins within tREC after VCC rises above VPF and is suspended when power failure occurs.
After each 24-hour period has elapsed, the battery is connected to an internal 1M
test resistor for one second.
During this one second, if the battery voltage falls below the battery-voltage trip point (~2.6V), the battery warning
output
BW is asserted. Once asserted, BW remains active until the attached DS3800 battery cap is replaced.
However, the battery is still retested after each VCC power-up, even if it was active on power-down. If the battery
voltage is found to be higher than ~2.6V during such testing,
BW is de-asserted and regular testing resumes. BW
has an open-drain output driver.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1254WB2-150 | 功能描述:实时时钟 2M X 8 NV SRAM w/Phantom Clock RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
| DS1254WB-C01 | 功能描述:实时时钟 2M X 8 NV SRAM w/Phantom Clock RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
| DS1254WB-C02 | 功能描述:实时时钟 2M X 8 NV SRAM w/Phantom Clock RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
| DS1254YB-100 | 功能描述:IC NVSRAM 16MBIT 100NS 168BGA RoHS:否 类别:集成电路 (IC) >> 时钟/计时 - 实时时钟 系列:- 产品培训模块:Obsolescence Mitigation Program 标准包装:1 系列:- 类型:时钟/日历 特点:警报器，闰年，SRAM 存储容量:- 时间格式:HH:MM:SS（12/24 小时） 数据格式:YY-MM-DD-dd 接口:SPI 电源电压:2 V ~ 5.5 V 电压 - 电源，电池:- 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-WDFN 裸露焊盘 供应商设备封装:8-TDFN EP 包装:管件 |
| DS1254YB2-100 | 功能描述:实时时钟 2M X 8 NV SRAM w/Phantom Clock RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
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