Datasheet > RV5C339A_03

RV5C339A_03

更新时间： 2024-11-29 03:21:11

品牌	Logo	应用领域
理光 - RICOH		监视器时钟
页数	文件大小	规格书
46页	364K
描述
3-WIRE SERIAL INTERFACE REAL-TIME CLOCK IC WITH VOLTAGE MONITORING FUNCTION

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RV5C339A_03 数据手册

3-WIRE SERIAL INTERFACE REAL-TIME CLOCK IC

WITH VOLTAGE MONITORING FUNCTION

NO.EA-055-0208

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. 0.35µA 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. 0.35µA (MAX. 0.8µA) at 3 volts (at 25˚C)

• Only three signal lines (SCLK, SIO, and CE) required for connection to the CPU.

Maximum clock frequency of 2 MHz (with V^DDof 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 (C^Gand CD)

• High precision oscillation adjustment circuit

• CMOS process

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中文翻译

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与RV5C339A_03相关器件

型号	品牌	获取价格	描述	数据表
RV5C339A-E2	RICOH	获取价格	3-WIRE SERIAL INTERFACE REAL-TIME CLOCK ICs WITH VOLTAGE MONITORING FUNCTION
RV5C348A	RICOH	获取价格	4-WIRE SERIAL INTERFACE
RV5C348B	RICOH	获取价格	4-WIRE SERIAL INTERFACE
RV5C386A	RICOH	获取价格	I2C-bus Real-Time Clock ICs with Voltage Monitoring Function
RV5C386A_03	RICOH	获取价格	I2C bus SERIAL INTERFACE REAL-TIME CLOCK IC WITH VOLTAGE MONITORING FUNCTION
RV5C386A-E2	RICOH	获取价格	I2C-bus Real-Time Clock ICs with Voltage Monitoring Function
RV5C386A-E2-F	RICOH	获取价格	Real Time Clock,
RV5C387A	RICOH	获取价格	I2C-bus Real-Time Clock ICs with Voltage Monitoring Function
RV5C387A_03	RICOH	获取价格	I2C bus SERIAL INTERFACE REAL-TIME CLOCK IC WITH VOLTAGE MONITORING FUNCTION
RV5C387AE2	ETC	获取价格	Industrial Control IC

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