Rx5C338A 系列
带电压监测功能的3线串口实时时钟IC

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  • 概述

    The Rx5C338A are CMOS real-time clock ICs 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. These models incorporate 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. 0.35 µA 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 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. SSOP10 and SSOP10G packages are available.

  • 规格
    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 Three Signal Lines (SCLK, SIO, CE), Serial Interface, Maximum Clock Frequency: 2 MHz (VDD = 5 V)
    时钟输出 32.768 kHz (CMOS Output with Control Pin)
    封装 SSOP10, SSOP10G
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    保护回路/功能

    ECO Clock Adjust OSC Halt Sensing Supply Voltage Monitoring Circuit Automatic Identification of Leap Years Selectable 12-hour and 24-hour Backup Switch
    功能说明
  • 技术资料
  • 品质&封装
    产品名称 对应 封装 标注 信赖性
    RV5C338A-E2-F
    • gradeConsumer
    		 SSOP10G RV5C338 RV5C338-F
    RS5C338A-E2-F
    • gradeConsumer
    		 SSOP10 RS5C338 RS5C338-F
    • 有关产品的详细信息，请参见数据表。
    • 封装文件或数据表包括封装尺寸，卷带规格，卷带盘尺寸，功耗和建议的焊盘图案。
  • 买入/样品
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功能说明

ECO ECO Function
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

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分类：实时时钟

接口 3-wire
计时消耗电流
(µA)		 0.35
计时电源电压
min (V)		 1.45
计时电源电压
max (V)		 5.50