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参数资料
| 型号： | DS1689SN+T&R |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 16/36页 |
| 文件大小： | 0K |
| 描述： | IC RTC SER NV RAM CTRL IN 28SOIC |
| 标准包装： | 1,000 |
| 类型： | 时钟/日历 |
| 特点： | NVSRAM |
| 存储容量： | 114B |
| 时间格式： | HH:MM:SS（12/24 小时） |
| 数据格式： | YY-MM-DD-dd |
| 接口： | 并联 |
| 电源电压： | 2.7 V ~ 3.3 V，4.5 V ~ 5.5 V |
| 电压 - 电源，电池： | 2.5 V ~ 3.7 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 28-SOIC |
| 包装： | 带卷 (TR) |
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DS1689/DS1693
23 of 36
ELAPSED TIME COUNTERS
The DS1689/DS1693 has two 32-bit elapsed time counters, which reside in bank 1 of the RTC registers.
To access these counters the DV0 bit in register A must first be set to a logical 1.
The VCC powered elapsed time counter resides in register 54H through 57H. The LSB of this counter
resides in register 54 and the MSB is in 57H. The VCC powered elapsed time counter runs only while the
VCCI input is within nominal limits. The elapsed time counter is a binary counter that records the number
of seconds that have elapsed. The counter can be read or written at the user’s discretion. The VBAT-
powered elapsed time counter resides in register 58H through 5BH. The LSB of this counter resides in
register 58 and the MSB is in 5BH.
The VBAT powered elapsed time counter runs continually as long as the VBAT or VBAUX pin is within
nominal limits regardless of the condition of VCCI. The number of seconds that have elapsed is recorded
in a binary counter and the counter can be read or written at the user’s discretion.
In a typical application, the VBAT-powered elapsed time counter can be used to record the length of time
that has elapsed from which the equipment that contains the device was first put into service. The VCC
powered counter can then be used to record the length of time that VCC power is applied. These functions
can be particularly useful for warranty and maintenance information. In addition, battery life can be
predicted based on known loading factors. However, it is worth noting that a properly selected battery
should power the DS1689/DS1693 and external RAM for the useful life of most equipment.
POWER-CYCLE COUNTER
The DS1689/DS1693 has a 16-bit power-cycle counter that resides in register 5C and 5D of bank 1. The
LSB of this counter resides in 5C and the MSB is in 5D. This binary counter is incremented by one count
each time VCCI power is applied within nominal limits. This counter can be read or written at the user’s
discretion.
相关PDF资料 |
PDF描述 |
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| DS1742-100IND | IC RTC RAM Y2K 5V 100NS 24-EDIP |
| DS1743P-70+ | IC RTC RAM Y2K 5V 70NS 34-PCM |
| DS1744-70IND | IC RTC RAM Y2K 5V 70NS 28-EDIP |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1689S-TRL | 功能描述:IC RTC SER W/NV RAM CTRL 28-SOIC 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 |
| DS1691 | 功能描述:实时时钟 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 |
| DS1691 WAF | 制造商:Texas Instruments 功能描述: |
| DS1691/1692 WAF | 制造商:Texas Instruments 功能描述: |
| DS1691A | 制造商:NSC 制造商全称:National Semiconductor 功能描述:(RS-422/RS-423) Line Drivers with TRI-STATE Outputs |
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