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參數資料
| 型號： | DS1742-100 |
| 廠商： | Maxim Integrated Products |
| 文件頁數： | 15/17頁 |
| 文件大小： | 0K |
| 描述： | IC RTC RAM Y2K 5V 100NS 24-EDIP |
| 標準包裝： | 14 |
| 類型： | 時鐘/日歷 |
| 特點： | 閏年，NVSRAM，Y2K |
| 存儲容量： | 2KB |
| 時間格式： | HH:MM:SS（24 小時） |
| 數據格式： | YY-MM-DD-dd |
| 接口： | 并聯 |
| 電源電壓： | 4.5 V ~ 5.5 V |
| 工作溫度： | 0°C ~ 70°C |
| 安裝類型： | 通孔 |
| 封裝/外殼： | 24-DIP 模塊（0.600"，15.24mm） |
| 供應商設備封裝： | 24-EDIP |
| 包裝： | 管件 |
DS1742
7 of 17
BATTERY LONGEVITY
The DS1742 has a lithium power source that is designed to provide energy for clock activity,
and clock and RAM data retention when the VCC supply is not present. The capability of this
internal power supply is sufficient to power the DS1742 continuously for the life of the
equipment in which it is installed. For specification purposes, the life expectancy is 10 years at
25°C with the internal clock oscillator running in the absence of VCC power. Each DS1742 is
shipped from Dallas Semiconductor with its lithium energy source disconnected, guaranteeing
full energy capacity. When VCC is first applied at a level greater than VPF, the lithium energy
source is enabled for battery backup operation. Actual life expectancy of the DS1742 will be
much longer than 10 years since no lithium battery energy is consumed when VCC is present.
BATTERY MONITOR
The DS1742 constantly monitors the battery voltage of the internal battery. The Battery Flag bit
(bit 7) of the day register is used to indicate the voltage level range of the battery. This bit is not
writable and should always be a 1 when read. If a 0 is ever present, an exhausted lithium
energy source is indicated and both the contents of the RTC and RAM are questionable.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| DS1742-100+ | 功能描述:實時時鐘 Timekeeping NV RAM 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: 安裝風格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| DS1742-100IND | 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: 安裝風格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| DS1742-100IND+ | 功能描述:實時時鐘 Timekeeping NV RAM 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: 安裝風格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| DS1742-70 | 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: 安裝風格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| DS1742-70+ | 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: 安裝風格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
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