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參數(shù)資料
| 型號： | RV5C338A-E2 |
| 廠商： | RICOH COMPANY LTD |
| 元件分類： | XO, clock |
| 英文描述： | DIODE ZENER SINGLE 200mW 8.2Vz 20mA-Izt 0.02549 0.1uA-Ir 6.5 SOD-323 3K/REEL |
| 中文描述： | REAL TIME CLOCK, PDSO10 |
| 封裝： | 4 X 2.90 MM, 1.20 MM HEIGHT, SSOP-10 |
| 文件頁數(shù)： | 36/52頁 |
| 文件大?。?/td> | 440K |
| 代理商： | RV5C338A-E2 |
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5C338A
< Supply Voltage Sensing Circuit >
The supply voltage monitoring circuit is configured to conduct a sampling operation during an interval of 7.8ms per
second to check for a drop in supply voltage below a threshold voltage of 2.1 or 1.6 volts for the VDSL bit setting of 0
(the default setting) or 1, respectively, in the control register 2, thus minimizing supply current requirements as
illustrated in the timing chart below. This circuit suspends a sampling operation once the VDET bit is set to 1 in the
control register 2.
7.8ms
1s
Threshold voltage
of 2.1 or 1.6 volts
Setting 0 to XSTP
and VDET bits
Setting VDET bit to 0
VDD
XSTP
Sampling operation by supply voltage
monitoring circuit
VDET
(D6 at address Fh)
Internal initialization period
(1 or 2 seconds)
Considerations in Using Oscillation Halt Sensing Circuit
Be sure to prevent the oscillation halt sensing circuit from malfunctioning by preventing the following:
1) Instantaneous power-down on the V
DD
2) Condensation on the crystal oscillator
3) On-board noise to the crystal oscillator
4) Applying to individual pins voltage exceeding their respective maximum ratings
In particular, note that the XSTP bit may fail to be set to 1 in the presence of any applied supply voltage as
illustrated below in such events as backup battery installation. Further, give special considerations to prevent
excessive chattering to power supply.
VDD
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| RV5C386A | I2C-bus Real-Time Clock ICs with Voltage Monitoring Function |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| RV5C339 | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:3-WIRE SERIAL INTERFACE REAL-TIME CLOCK ICs WITH VOLTAGE MONITORING FUNCTION |
| RV5C339A | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:3-WIRE SERIAL INTERFACE REAL-TIME CLOCK ICs WITH VOLTAGE MONITORING FUNCTION |
| RV5C339A_03 | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:3-WIRE SERIAL INTERFACE REAL-TIME CLOCK IC WITH VOLTAGE MONITORING FUNCTION |
| RV5C339A-E2 | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:3-WIRE SERIAL INTERFACE REAL-TIME CLOCK ICs WITH VOLTAGE MONITORING FUNCTION |
| RV5C348A | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:4-WIRE SERIAL INTERFACE REAL-TIME CLOCK ICs WITH VOLTAGE MONITORING FUNCTION |
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