Datasheet > 微控制器和处理器 > 计时器或实时时钟> RS5C372B

RS5C372B

更新时间： 2024-11-18 22:43:47

品牌	Logo	应用领域
理光 - RICOH		时钟
页数	文件大小	规格书
39页	473K
描述
I2C-bus Serial Interface Real Time Clock (8pin SSOP)

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技术参数
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RS5C372B 技术参数

是否无铅：	含铅	是否Rohs认证：	不符合
生命周期：	Active	零件包装代码：	SOIC
包装说明：	LSSOP, SSOP8,.25	针数：	8
Reach Compliance Code：	unknown	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	5.34
其他特性：	SECOND DIGIT ADJUSTMENT BY +/-30 SECONDS	最大时钟频率：	0.032 MHz
信息访问方法：	I2C	中断能力：	Y
JESD-30 代码：	R-PDSO-G8	JESD-609代码：	e0
长度：	4.4 mm	湿度敏感等级：	1
端子数量：	8	最高工作温度：	85 °C
最低工作温度：	-40 °C	封装主体材料：	PLASTIC/EPOXY
封装代码：	LSSOP	封装等效代码：	SSOP8,.25
封装形状：	RECTANGULAR	封装形式：	SMALL OUTLINE, LOW PROFILE, SHRINK PITCH
峰值回流温度（摄氏度）：	NOT SPECIFIED	电源：	2/6 V
认证状态：	Not Qualified	座面最大高度：	1.45 mm
子类别：	Timer or RTC	最大供电电压：	6 V
最小供电电压：	2 V	标称供电电压：	3 V
表面贴装：	YES	技术：	CMOS
温度等级：	INDUSTRIAL	端子面层：	Tin/Lead (Sn/Pb)
端子形式：	GULL WING	端子节距：	0.65 mm
端子位置：	DUAL	最短时间：	SECONDS
处于峰值回流温度下的最长时间：	NOT SPECIFIED	易失性：	YES
宽度：	3.5 mm	uPs/uCs/外围集成电路类型：	TIMER, REAL TIME CLOCK
Base Number Matches：	1

RS5C372B 数据手册

Dec. 15 ’97

I²C-bus Serial Interface

Real Time Clock (8pin SSOP)

RS5C372B

■ OUTLINE

The RS5C372B is a CMOS type real-time clock which is connected to the CPU via 2-wire and capable of serial

transmission of clock and calendar data to the CPU. The RS5C372B 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 (0.5µA at 3V). It also

provides an oscillator halt sensing function applicable for data validation at power-on and other occasions and

32kHz clock output (CMOS output) for an external micro computer. 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 between 32.768kHz or

32.000kHz types. Integrated into an ultra compact and ultra thin 8 pin SSOP package, the RS5C372B is the

optimum choice for equipment requiring small sized and low power consuming products.

■ Features

● Time keeping voltage 1.45V to 6.0V

● Lowest supply current 0.5µA TYP (0.9µA MAX) at 3V(25°C)

(0.9µA MAX) at 3V(-40 to +85°C)

● Connected to the CPU via only 2-wire (I²C-bus interface, max.400KHz, address 7bits)

● A clock counter (hours, minutes, and seconds) and a calendar counter (leap years, years, months, days,

and days of the week) in BCD codes

● Interrupt to the CPU (period of one month to half second, with interrupt flag, interrupt halt function)

(/INTR)

● Two systems of alarm functions (days of the week, hours, and minutes) (/INTR)

● Oscillation halt sensing to judge internal data validity

● Clock output of 32.768kHz(32.000kHz) ( output controllable via a register)

(32KOUT:CMOS push-pull output)

● Second digit adjustment by ±30 seconds

● Automatic leap year recognition up to the year 2099

● 12-hour or 24-hour time display selectable

● Oscillation stabilizing capacity (CG, CD) incorporated

● High precision clock error adjustment circuit

● Oscillator of 32.768kHz or 32.000kHz may be used

● CMOS logic

● Package:8pin SSOP

*) I²C-bus is a trademark of PHILIPS ELECTRONICS N.V.

■ Block Diagram

ALARM_A REGISTER

COMPARATOR_A

(WEEK,MIN,HOUR)

32kHz OUTPUT

32KOUT

CONTROL

VDD

VSS

ALARM_B REGISTER

(WEEK,MIN,HOUR)

COMPARATOR_B

OSCIN

TIME COUNTER

(SEC,MIN,HOUR,WEEK,DAY,MONTH,YEAR)

DIVIDER

CORREC

-TION

DIV

OSC

OSCOUT

OSC

DETECT

ADDRESS

DECODER

ADDRESS

SCL

I/O

CONTROL

INTERRUPT CONTROL

SHIFT REGISTER

SDA

/INTR

- 1 -

12 3 4 5 6 7...39

中文翻译

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RS5C372B 替代型号

型号	品牌	替代类型	描述	数据表
RS5C372A	RICOH	功能相似	I2C bus SERIAL INTERFACE REAL-TIME CLOCK ICs
RS5C372B-E2	RICOH	功能相似	I2C-bus Serial Interface Real Time Clock (8pin SSOP)

与RS5C372B相关器件

型号	品牌	获取价格	描述	数据表
RS5C372B-E1	RICOH	获取价格	I2C-bus Serial Interface Real Time Clock (8pin SSOP)
RS5C372B-E2	RICOH	获取价格	I2C-bus Serial Interface Real Time Clock (8pin SSOP)
RS5C373A	ETC	获取价格	Real-Time Clock
RS5C4F-C	DIALIGHT	获取价格	StreetSense? RS Series LED Roadway Sign Light
RS5C4F-G	DIALIGHT	获取价格	StreetSense? RS Series LED Roadway Sign Light
RS5C4F-H	DIALIGHT	获取价格	StreetSense? RS Series LED Roadway Sign Light
RS5C4K-C	DIALIGHT	获取价格	StreetSense? RS Series LED Roadway Sign Light
RS5C4K-G	DIALIGHT	获取价格	StreetSense? RS Series LED Roadway Sign Light
RS5C4K-H	DIALIGHT	获取价格	StreetSense? RS Series LED Roadway Sign Light
RS5C62	RICOH	获取价格	REAL-TIME CLOCK

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