RS5C372 系列
I2C总线串口实时时钟IC

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  • 概述

    The RS5C372 is a CMOS type real-time clock which is connected to the CPU via 2-wires and capable of serial transmission of clock and calendar data to the CPU. The RS5C372 can generate various periodic interrupt clock pulses lasting for long period (one month), and alarm interrupt can be made by days of the week, hours, and minutes by two incorporated systems. Since an oscillation circuit is driven at a constant voltage, it undergoes fluctuations of few voltage and consequently offers low current consumption (Typ. 0.5 µA at 3V). It also provides an oscillator halt sensing function applicable for data validation at power-on and other occasions and 32-kHz clock output for an external micro computer. (Ver. A: Nch. open drain output, Ver. B: CMOS output) The product also incorporates a time trimming circuit that adjusts the clock with higher precision by adjusting any errors in crystal oscillator frequencies based on signals from the CPU. The crystal oscillator may be selected from 32.768 kHz or 32.000 kHz types. Integrated into an ultra compact and ultra thin 8-pin SSOP package, the RS5C372 is the optimum choice for equipment requiring small sized and low power consuming products.

  • 规格
    计时电源电压范围 RS5C372A: 1.3 V to 6.0 V
    RS5C372B: 1.45 V to 6.0 V
    电源电流 Typ. 0.5 µA
    连接到CPU Two Signal Lines (I2C Bus Interface, MAX. 400 kHz, 7-bit address)
    时钟输出 32.768 kHz or 32.000 kHz
    RS5C372A: Nch Open Drain Output Controllable by Command
    RS5C372B: CMOS Output Controllable by Command
    封装 SSOP8

    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
  • 技术资料
    • Typical Application

      Typical Application

      *) The SCL and SDA pins of the RS5C372A do not contain protective diodes on VDD side. Therefore, back up power supply≤system power supply causes no adverse effect.

    • Typical Application

      Typical Application

      *) The SCL and SDA pins of the RS5C372B do not contain protective diodes on VDD side. Therefore, back up power supply≤system power supply causes no adverse effect.

  • 品质&封装
    • 有关产品的详细信息,请参见数据表。
    • 封装文件包括封装尺寸,卷带规格,卷带盘尺寸,功耗和建议的焊盘图案。
    • 请联系我们或我们的代理商以获取未发布的可靠性信息。

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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 2-wire
计时消耗电流
(µA)
0.5
计时电源电压
min (V)
1.3
计时电源电压
max (V)
6.00