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參數(shù)資料
| 型號： | R2033K-E2 |
| 廠商： | RICOH COMPANY LTD |
| 元件分類： | XO, clock |
| 英文描述： | 3 wire interface Real-Time Clock ICs |
| 中文描述： | 0 TIMER(S), REAL TIME CLOCK, QCC12 |
| 封裝： | 2 X 2 MM, 1 MM HEIGHT, FFP-12 |
| 文件頁數(shù)： | 28/50頁 |
| 文件大?。?/td> | 542K |
| 代理商： | R2033K-E2 |
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R2033K/T
Configuration of Oscillation Circuit and Correction of Time Count
Deviations
Configuration of Oscillation Circuit
28
32kHz
CG
CD
A
OSCIN
OSCOUT
Oscillator
Circuit
The oscillation circuit is driven at a constant voltage of approximately 1.2 volts relative to the level of the VSS pin
input. As such, it is configured to generate an oscillating waveform with a peak-to-peak voltage on the order of
1.2 volts on the positive side of the VSS pin input.
< Considerations in Handling quartz crystal unit >
Generally, quartz crystal units have basic characteristics including an equivalent series resistance (R1)
indicating the ease of their oscillation and a load capacitance (CL) indicating the degree of their center frequency.
Particularly, quartz crystal units intended for use in the R2033K/T are recommended to have a typical R1 value
of 50k
and a typical CL value of 6 to 9pF. To confirm these recommended values, contact the manufacturers
of quartz crystal units intended for use in these particular models.
< Considerations in Installing Components around the Oscillation Circuit >
1) Install the quartz crystal unit in the closest possible vicinity to the real-time clock ICs.
2) Avoid laying any signal lines or power lines in the vicinity of the oscillation circuit (particularly in the area
marked "A" in the above figure).
3) Apply the highest possible insulation resistance between the OSCIN and OSCOUT pins and the printed
circuit board.
4) Avoid using any long parallel lines to wire the OSCIN and OSCOUT pins.
5) Take extreme care not to cause condensation, which leads to various problems such as oscillation halt.
< Other Relevant Considerations >
1) We cannot recommend connecting the external input of 32.768-kHz clock pulses to the OSCIN pin.
2) To maintain stable characteristics of the quartz crystal unit, avoid driving any other IC through 32.768-kHz
clock pulses output from the OSCOUT pin.
Typical externally-equipped element
X’tal : 32.768kHz
Standard values of internal elements
CG,CD 10pF typ
(R1=30k
typ)
(CL=6pF to 8pF)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| R2033T | 3 wire interface Real-Time Clock ICs |
| R2043T | 4-wire Serial Interface |
| R2043T-E2 | 4-wire Serial Interface |
| R2043K | 4-wire Serial Interface |
| R2043K-E2 | 4-wire Serial Interface |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| R2033T | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:3 wire interface Real-Time Clock ICs |
| R2033T-E2 | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:3 wire interface Real-Time Clock ICs |
| R203426000 | 功能描述:RF 連接器 SSMB(M) STR NA PCB RoHS:否 制造商:Bomar Interconnect 產(chǎn)品:Connectors 射頻系列:BNC 型式:Jack (Female) 極性: 觸點(diǎn)電鍍:Gold 阻抗: 端接類型:Solder 主體類型:Straight Bulkhead 電纜類型: |
| R203426000W | 功能描述:RF 連接器 EMB DR CI RoHS:否 制造商:Bomar Interconnect 產(chǎn)品:Connectors 射頻系列:BNC 型式:Jack (Female) 極性: 觸點(diǎn)電鍍:Gold 阻抗: 端接類型:Solder 主體類型:Straight Bulkhead 電纜類型: |
| R203553000 | 功能描述:RF 連接器 SSMB(M) STR BH SP RoHS:否 制造商:Bomar Interconnect 產(chǎn)品:Connectors 射頻系列:BNC 型式:Jack (Female) 極性: 觸點(diǎn)電鍍:Gold 阻抗: 端接類型:Solder 主體類型:Straight Bulkhead 電纜類型: |
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