RS5C338A 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
规格
技术资料
品质&封装
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概述

The RS5C338A 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 package is 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

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

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

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