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參數(shù)資料
| 型號(hào)： | DS1284QN |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | Timer or RTC |
| 英文描述： | 1 TIMER(S), REAL TIME CLOCK, PQCC28 |
| 封裝： | 0.452 INCH, PLASTIC, LCC-28 |
| 文件頁數(shù)： | 14/18頁 |
| 文件大?。?/td> | 299K |
| 代理商： | DS1284QN |
DS1284/DS1286
5 of 18
HUNDREDTHS-OF-SECONDS GENERATOR
The hundredths-of-seconds generator circuit shown in the Block Diagram (Figure 1) is a state machine
that divides the incoming frequency (4096Hz) by 41 for 24 cycles and 40 for 1 cycle. This produces a
100Hz output that is slightly off during the short term, and is exactly correct every 250ms. The divide
ratio is given by:
Ratio = [41 x 24 + 40 x 1] / 25 = 40.96
Thus, the long-term average frequency output is exactly 100Hz.
Figure 2. Watchdog Timekeeper Registers
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DS1286 | 1 TIMER(S), REAL TIME CLOCK, DIP28 |
| DS12885 | 1 TIMER(S), REAL TIME CLOCK, PDIP24 |
| DS12885T | 1 TIMER(S), REAL TIME CLOCK, PQFP32 |
| DS12887A | 1 TIMER(S), REAL TIME CLOCK, PDIP24 |
| DS12C887A | 1 TIMER(S), REAL TIME CLOCK, PDIP24 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1284QN/T&R | 制造商:Maxim Integrated Products 功能描述:IC TIMEKEEPER WATCHDG IND 28PLCC |
| DS1284QN/T&R | 功能描述:實(shí)時(shí)時(shí)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(shí)間格式:HH:MM:SS RTC 存儲(chǔ)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 |
| DS1284QN+ | 功能描述:實(shí)時(shí)時(shí)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(shí)間格式:HH:MM:SS RTC 存儲(chǔ)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 |
| DS1284QN+T&R | 制造商:Maxim Integrated Products 功能描述:IC TIMEKEEPER WATCHDG IND 28PLCC |
| DS1284QN+T&R | 功能描述:實(shí)時(shí)時(shí)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(shí)間格式:HH:MM:SS RTC 存儲(chǔ)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 |
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