The RV5C386A is a CMOS real-time clock IC connected to the CPU by two signal lines, SCL and SDA, and configured to perform serial transmission of time and calendar data to the CPU. 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. 0.35 µA at 3 volts). The oscillation halt sensing circuit can be used to judge the validity of internal data in such events as poweron.
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 (CMOS push-pull) is intended to output sub-clock pulses for the external microcomputer. The 32-kHz clock circuit can be disabled by certain input pin. 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 compact 10-pin SSOP-G.
计时电源电压范围 1.45 V to 5.50 V 电源电流 0.35 µA (VDD = 3 V) 连接到CPU Two Signal Lines (SCL,SDA), I2C Bus Interface, Maximum Clock Frequency: 400 kHz (VDD = 3 V) 时钟输出 32.768 kHz (CMOS Output with Control Pin) 封装 SSOP10G
ECO Clock Adjust OSC Halt Sensing Supply Voltage Monitoring Circuit Automatic Identification of Leap Years Selectable 12-hour and 24-hour Backup Switch
|Clock Adjust||Clock Adjust Function|
|OSC Halt Sensing||OSC Halt Sensing Function|
|Supply Voltage Monitoring Circuit||Supply Voltage Monitoring Function|
|Automatic Identification of Leap Years||Automatic Identification of Leap Years|
|Selectable 12-hour and 24-hour||Selectable 12-hour and 24-hour|
|Built-in VD with Delay Time||Built-in VD with Delay Time|