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| 型号： | RV5C339 |
| 厂商： | Ricoh Co., Ltd. |
| 英文描述： | 3-WIRE SERIAL INTERFACE REAL-TIME CLOCK ICs WITH VOLTAGE MONITORING FUNCTION |
| 中文描述： | 3线串行接口实时时钟IC，带有电压检测功能 |
| 文件页数： | 34/51页 |
| 文件大小： | 421K |
| 代理商： | RV5C339 |
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1
3-WIRE SERIAL INTERFACE REAL-TIME CLOCK IC
WITH VOLTAGE MONITORING FUNCTION
RV5C339A
OUTLINE
The RV5C339A is a CMOS real-time clock IC connected to the CPU by three signal lines CE (Chip Enable), SCLK
(Serial Clock), and SIO (Serial Input/Output), and configured to perform serial transmission of time and calendar
data to the CPU. This model incorporates different functional circuits. The periodic interrupt circuit is configured
to generate interrupt signals with six selectable interrupts ranging from 0.5 seconds to 1 month. The 2 alarm
circuits generate interrupt signals at preset times. The oscillation circuit is driven under constant voltage so that
fluctuations in oscillation frequency due to voltage are small and supply current is also small (TYP. 0.35A at 3
volts). The oscillation halt sensing circuit can be used to judge the validity of internal data in such events as power-
on. The supply voltage monitoring circuit is configured to record a drop in supply voltage below two selectable
supply voltage monitoring threshold settings. The 32-kHz clock output function (Nch. open drain) is intended to
output sub-clock pulses for the external microcomputer. The oscillation adjustment circuit is intended to adjust time
counts with high precision by correcting deviations in the oscillation frequency of the crystal oscillator. This model
comes in an ultra-compact 10-pin SSOP-G (with a height of 1.20mm and a pin pitch of 0.5mm).
FEATURES
Timekeeping supply voltage ranging from 1.45 to 5.5 volts
Low supply current: TYP. 0.35A (MAX. 0.8A) at 3 volts (at 25C)
Only three signal lines (SCLK, SIO, and CE) required for connection to the CPU.
Maximum clock frequency of 2 MHz (with VDD of 5 volts)
Time counters (counting hours, minutes, and seconds) and calendar counters (counting years, months, days, and
weeks) (in BCD format)
1900/2000 identification bit for Year 2000 compliance
Interrupt circuit configured to generate interrupt signals (with interrupts ranging from 0.5 seconds to 1 month) to
the CPU and provided with an interrupt flag and an interrupt halt circuit
2 alarm circuits (Alarm_W for week , hour , and minute alarm settings and Alarm_D for hour and minute alarm
settings)
32-kHz clock circuit (Nch. open drain output)
Designed to disable 32-kHz clock output in response to a command from the host computer.
Oscillation halt sensing circuit which can be used to judge the validity of internal data
Supply voltage monitoring circuit with two supply voltage monitoring threshold settings
Automatic identification of leap years up to the year 2099
Selectable 12-hour and 24-hour mode settings
Built-in oscillation stabilization capacitors (CG and CD)
High precision oscillation adjustment circuit
CMOS process
Ultra-compact 10-pin SSOP-G (with a height of 1.20mm and size of 4.0
×2.9mm)
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相关代理商/技术参数 |
参数描述 |
|---|---|
| RV5C339A | 制造商:RICOH 制造商全称: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 制造商全称: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 制造商全称: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 制造商全称:RICOH electronics devices division 功能描述:4-WIRE SERIAL INTERFACE REAL-TIME CLOCK ICs WITH VOLTAGE MONITORING FUNCTION |
| RV5C348B | 制造商:RICOH 制造商全称:RICOH electronics devices division 功能描述:4-WIRE SERIAL INTERFACE REAL-TIME CLOCK ICs WITH VOLTAGE MONITORING FUNCTION |
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