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参数资料
| 型号： | RS5C316B-E2 |
| 厂商： | RICOH COMPANY LTD |
| 元件分类： | 时钟/数据恢复及定时提取 |
| 英文描述： | 0 TIMER(S), REAL TIME CLOCK, PDSO8 |
| 封装： | 0.65 MM PITCH, SSOP-8 |
| 文件页数： | 20/38页 |
| 文件大小： | 288K |
| 代理商： | RS5C316B-E2 |
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RS5C316A/B
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Any rise or fall in ambient temperature from its reference value ranging from 20 to 25 degrees Celsius causes
a time delay for a 32kHz crystal oscillator. It is recommendable, therefore, to set slightly high oscillation fre-
quency at room temperature.
9.2 Oscillation Frequency Adjustment
After adjustment, oscillation frequency is subject to fluctuations of an ambient temperature and supply voltage. See
“12. Typical Characteristic Measurements”.
Select crystal oscillator
NO
OK
NO
Fix CG
(For fixed capacitance)
(For variable capacitance)
Change CL
value of crystal
Optimize CG
END
Fix the capacitance of CG
Optimize central
variable capacitance value
Make fine frequency adjustment
with variable capacitance.
Change CL
value of crystal
*1
*3
*2
*1) To ensure that the crystal is matched to the IC, inquire its crystal supplier about its CL (load capacitance) and R1 (equivalent series resistance) values.
It is recommended that the crystal should have the CL value range of 6 to 8pF and the typical R1 value of 30k
.
*2) To allow for the possible effects of floating capacitance, select the optimum capacitance of the CG on the mounted PCB. The standard and recom-
mendable capacitance values of the CG range from 5 to 24pF and 8 to 20pF, respectively. When you need to change the frequency to get higher
accuracy, change the CL value of the crystal.
*3) Collate the central variable capacitance value of the CG with its oscillation frequency by adjusting the angle of rotation of the variable capacitance of
the CG in such a manner that the actual variable capacitance value is slightly smaller than the central variable capacitance value. (It is recommended
that the central variable capacitance value should be slightly less than one half of the actual variable capacitance value because the smaller is vari-
able capacitance, the greater are fluctuations in oscillation frequency.) In the case of an excessive deviation of the oscillation frequency from its
required value, change the CL value of the crystal.
Note
相关PDF资料 |
PDF描述 |
|---|---|
| RS5C317B-E1 | 0 TIMER(S), REAL TIME CLOCK, PDSO14 |
| RS5C317B-E2 | 0 TIMER(S), REAL TIME CLOCK, PDSO14 |
| RS5C321A-E1 | 0 TIMER(S), REAL TIME CLOCK, PDSO8 |
| RS5C321B-E1 | 0 TIMER(S), REAL TIME CLOCK, PDSO8 |
| RS5C321B-E2 | 0 TIMER(S), REAL TIME CLOCK, PDSO8 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| RS5C317A | 制造商:RICOH 制造商全称:RICOH electronics devices division 功能描述:ULTRA-COMPACT HIGH PERFORMANCE SERIAL REAL-TIME CLOCK ICs |
| RS5C317A/B | 制造商:RICOH 制造商全称:RICOH electronics devices division 功能描述:real-time clock ICs |
| RS5C317B | 制造商:RICOH 制造商全称:RICOH electronics devices division 功能描述:ULTRA-COMPACT HIGH PERFORMANCE SERIAL REAL-TIME CLOCK ICs |
| RS5C321A | 制造商:RICOH 制造商全称:RICOH electronics devices division 功能描述:ULTRA-COMPACT SERIAL REAL-TIME CLOCK ICs WITH 32.768kHz |
| RS5C321A/B | 制造商:RICOH 制造商全称:RICOH electronics devices division 功能描述:real-time clock ICs |
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