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參數(shù)資料
| 型號： | DS1689SN+T&R |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 16/36頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC RTC SER NV RAM CTRL IN 28SOIC |
| 標(biāo)準(zhǔn)包裝： | 1,000 |
| 類型： | 時鐘/日歷 |
| 特點： | NVSRAM |
| 存儲容量： | 114B |
| 時間格式： | HH:MM:SS（12/24 小時） |
| 數(shù)據(jù)格式： | YY-MM-DD-dd |
| 接口： | 并聯(lián) |
| 電源電壓： | 2.7 V ~ 3.3 V，4.5 V ~ 5.5 V |
| 電壓 - 電源，電池： | 2.5 V ~ 3.7 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 28-SOIC（0.295"，7.50mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 28-SOIC |
| 包裝： | 帶卷 (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.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1689S-TRL | 功能描述:IC RTC SER W/NV RAM CTRL 28-SOIC RoHS:否 類別:集成電路 (IC) >> 時鐘/計時 - 實時時鐘 系列:- 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- 類型:時鐘/日歷 特點:警報器，閏年，SRAM 存儲容量:- 時間格式:HH:MM:SS（12/24 小時） 數(shù)據(jù)格式:YY-MM-DD-dd 接口:SPI 電源電壓:2 V ~ 5.5 V 電壓 - 電源，電池:- 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-WDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:8-TDFN EP 包裝:管件 |
| DS1691 | 功能描述:實時時鐘 RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時間格式:HH:MM:SS RTC 存儲容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝: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 制造商全稱:National Semiconductor 功能描述:(RS-422/RS-423) Line Drivers with TRI-STATE Outputs |
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