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X1286A8

更新时间： 2024-02-02 18:14:05
品牌 Logo 应用领域
英特矽尔 - INTERSIL 监控可编程只读存储器电动程控只读存储器电可擦编程只读存储器时钟
页数 文件大小 规格书
25页 362K
描述
Intersil Real Time Clock/Calendar/CPU Supervisor with EEPROM X1286

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中文翻译

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X1286A8 技术参数

是否Rohs认证： 符合生命周期：Obsolete
零件包装代码：SOIC包装说明：SOP, SOP8,.3
针数：8Reach Compliance Code：unknown
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.69最大时钟频率：0.032 MHz
信息访问方法：I2C中断能力：Y
JESD-30 代码：R-PDSO-G8长度：5.255 mm
端子数量：8计时器数量：1
最高工作温度：70 °C最低工作温度：
封装主体材料：PLASTIC/EPOXY封装代码：SOP
封装等效代码：SOP8,.3封装形状：RECTANGULAR
封装形式：SMALL OUTLINE峰值回流温度（摄氏度）：NOT SPECIFIED
电源：3/5 V认证状态：Not Qualified
座面最大高度：2.03 mm子类别：Timer or RTC
最大供电电压：5.5 V最小供电电压：2.7 V
标称供电电压：5 V表面贴装：YES
技术：CMOS温度等级：COMMERCIAL
端子形式：GULL WING端子节距：1.27 mm
端子位置：DUAL最短时间：1/100 SECOND
处于峰值回流温度下的最长时间：NOT SPECIFIED易失性：NO
宽度：5.23 mmuPs/uCs/外围集成电路类型：TIMER, REAL TIME CLOCK
Base Number Matches：1

X1286A8 数据手册

 浏览型号X1286A8的Datasheet PDF文件第17页浏览型号X1286A8的Datasheet PDF文件第18页浏览型号X1286A8的Datasheet PDF文件第19页浏览型号X1286A8的Datasheet PDF文件第21页浏览型号X1286A8的Datasheet PDF文件第22页浏览型号X1286A8的Datasheet PDF文件第23页 
X1286  
APPLICATION SECTION  
the temperature extremes of -40 and +85 deg C. It is  
possible to address this variable drift by adjusting the  
load capacitance of the crystal, which will result in pre-  
dictable change to the crystal frequency. The Intersil  
RTC family allows this adjustment over temperature  
since the devices include on-chip load capacitor trim-  
ming. This control is handled by the Analog Trimming  
Register, or ATR, which has 6 bits of control . The load  
capacitance range covered by the ATR circuit is  
approximately 3.25pF to 18.75pF, in 0.25pf incre-  
ments. Note that actual capacitance would also  
include about 2pF of package related capacitance. In-  
circuit tests with commercially available crystals dem-  
onstrate that this range of capacitance allows fre-  
quency control from +116ppm to -37ppm, using a  
12.5pF load crystal.  
CRYSTAL OSCILLATOR AND TEMPERATURE  
COMPENSATION  
Intersil has now integrated the oscillator compensation  
circuity on-chip, to eliminate the need for external  
components and adjust for crystal drift over tempera-  
ture and enable very high accuracy time keeping  
(<5ppm drift).  
The Intersil RTC family uses an oscillator circuit with  
on-chip crystal compensation network, including  
adjustable load-capacitance. The only external com-  
ponent required is the crystal. The compensation net-  
work is optimized for operation with certain crystal  
parameters which are common in many of the surface  
mount or tuning-fork crystals available today. Table 6  
summarizes these parameters.  
In addition to the analog compensation afforded by the  
adjustable load capacitance, a digital compensation  
feature is available for the Intersil RTC family. There  
are three bits known as the Digital Trimming Register  
or DTR, and they operate by adding or skipping pulses  
in the clock signal. The range provided is ±30ppm in  
increments of 10ppm. The default setting is 0ppm. The  
DTR control can be used for coarse adjustments of  
frequency drift over temperature or for crystal initial  
accuracy correction.  
Table 7 contains some crystal manufacturers and part  
numbers that meet the requirements for the Intersil  
RTC products.  
The turnover temperature in Table 7 describes the  
temperature where the apex of the of the drift vs. tem-  
perature curve occurs. This curve is parabolic with the  
drift increasing as (T-T0) . For an Epson MC-405  
device, for example, the turnover temperature is typi-  
cally 25 deg C, and a peak drift of >110ppm occurs at  
2
Table 7. Crystal Parameters Required for Intersil RTC’s  
Parameter  
Min  
Typ  
Max  
Units  
kHz  
ppm  
°C  
Notes  
Frequency  
32.768  
Freq. Tolerance  
±100  
30  
Down to 20ppm if desired  
Turnover Temperature  
20  
25  
Typically the value used for most  
crystals  
Operating Temperature Range  
Parallel Load Capacitance  
Equivalent Series Resistance  
-40  
85  
50  
°C  
pF  
kΩ  
12.5  
For best oscillator performance  
Table 8. Crystal Manufacturers  
Manufacturer  
Citizen  
Part Number  
CM201, CM202, CM200S  
MC-405, MC-406  
RSM-200S-A or B  
32S12A or B  
Temp Range  
-40 to +85°C  
-40 to +85°C  
-40 to +85°C  
-40 to +85°C  
-10 to +60°C  
-10 to +60°C  
-40 to +85°C  
+25°C Freq Toler.  
±20ppm  
Epson  
Raltron  
SaRonix  
Ecliptek  
ECS  
±20ppm  
±20ppm  
±20ppm  
ECPSM29T-32.768K  
ECX-306/ECX-306I  
FSM-327  
±20ppm  
±20ppm  
Fox  
±20ppm  
FN8101.0  
March 29, 2005  
20  
1...17181920212223...25

中文翻译

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