Datasheet > 微控制器和处理器 > 计时器或实时时钟> RS5C348B

RS5C348B

更新时间： 2024-01-17 21:16:42

品牌	Logo	应用领域
理光 - RICOH		计时器或实时时钟微控制器和处理器外围集成电路光电二极管
页数	文件大小	规格书
45页	1293K
描述
4-WIRE SERIAL INTERFACE

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技术参数
数据手册

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RS5C348B 技术参数

是否无铅：	含铅	是否Rohs认证：	不符合
生命周期：	Obsolete	零件包装代码：	SSOP
包装说明：	LSSOP, TSSOP10,.25,20	针数：	10
Reach Compliance Code：	unknown	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	5.77
Is Samacsys：	N	最大时钟频率：	0.032 MHz
信息访问方法：	SERIAL, 4-WIRE/SPI	中断能力：	Y
JESD-30 代码：	R-PDSO-G10	JESD-609代码：	e0
长度：	4.4 mm	湿度敏感等级：	1
端子数量：	10	计时器数量：
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：	TSSOP10,.25,20	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：	2/5.5 V	认证状态：	Not Qualified
座面最大高度：	1.35 mm	子类别：	Timer or RTC
最大供电电压：	5.5 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：	0.5 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

RS5C348B 数据手册

’03.09.25

12345

4-wire Serial Interface

Rx5C348A/B

ꢀ OUTLINE

The Rx5C348A/B are CMOS real-time clock ICs connected to the CPU by four signal lines, CE, SCLK, SI, SO,

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 interrupt circuits generate interrupt signals at preset times. As the oscillation circuit is

driven under constant voltage, fluctuation of the oscillator frequency due to supply voltage is small, and the time

keeping current is small (TYP. 0.35µA at 3V: Rx5C348A, TYP.0.55µA at 3V: Rx5C348B). 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 32.768kHz clock output function (N-channel open drain output) is intended to output

sub-clock pulses for the external microcomputer. The 32-kHz clock circuit can be disabled by certain register

settings for the Rx5C348A but cannot be disabled by any register settings for the Rx5C348B. The oscillation

adjustment circuit is intended to adjust time counts with high precision by correcting deviations in the oscillation

frequency of the crystal oscillator. These models come in an ultra-compact SSOP10 (RS5C348A/B), SSOP10G

(RV5C348A/B), TSSOP10G (RT5C348B)

Package

32-kHz Clock Output

RS5C348A

RS5C348B

RV5C348A

RV5C348B

RT5C348B

SSOP10 (Pin Pitch 0.5mm, Height1.25mm,

6.4mm×3.5mm)

SSOP10G (Pin Pitch 0.5mm, Height1.2mm,

4.0mm×2.9mm)

TSSOP10G (Pin Pitch 0.5mm, Height0.85mm,

4.0mm×2.9mm)

Controllable by command

Keeping output enabled

Controllable by command

Keeping output enabled

ꢀ FEATURES

ꢁ

Timekeeping supply voltage ranging from 1.45 to 5.5V

Low power consumption

Rx5C348A: 0.35µA TYP (0.8µA MAX) at VDD=3V

Rx5C348B: 0.55µA TYP (1.0µA MAX) at VDD=3V

Only four signal lines (CE, SCLK, SI, and SO) required for connection to the CPU.

Maximum clock frequency of 2 MHz (with VDD = 5V)

Time counters (counting hours, minutes, and seconds) and calendar counters (counting years, months, days,

and weeks) (in BCD format)

ꢁ

Interrupt circuit configured to generate interrupt signals (with interrupts ranging from 0.5 seconds to 1 month)

to the CPU and provided with an interrupt flag and an interrupt halt

2 alarm interrupt circuits (Alarm_W for week, hour, and minute alarm settings and Alarm_D for hour and

minute alarm settings)

ꢁ

32-kHz clock output circuit (Nch. open drain output)

The Rx5C348A is designed to disable 32-kHz clock output in response to a command from the host computer

and the Rx5C348B is designed to keep 32-kHz output enabled.

Oscillation halt sensing circuit which can be used to judge the validity of internal data

Supply voltage monitoring circuit with two supply voltage monitoring threshold settings

Automatic identification of leap years up to the year 2099

Selectable 12-hour and 24-hour mode settings

Built-in oscillation stabilization capacitors (CG and CD)

High precision oscillation adjustment circuit

Ultra-compact SSOP10 (RS5C348A/B), SSOP10G (RV5C348A/B), TSSOP10G (RT5C348B)

CMOS process

ꢁ

12345

Rev.2.01

- 1 -

12 3 4 5 6 7...45

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与RS5C348B相关器件

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RS5C348B-E2	RICOH	Real-Time Clock	获取价格
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RS5C372A	RICOH	I2C bus SERIAL INTERFACE REAL-TIME CLOCK ICs	获取价格
RS5C372A-E1	RICOH	Real Time Clock, 0 Timer(s), CMOS, PDSO8, 0.65 MM PITCH, SSOP-8	获取价格
RS5C372A-E2	RICOH	Real Time Clock, Volatile, 0 Timer(s), CMOS, PDSO8, 0.65 MM PITCH, SSOP-8	获取价格
RS5C372A-E2-F	RICOH	Real Time Clock, 0 Timer(s), CMOS, PDSO8, SSOP-8	获取价格

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