产品概述

描述

The M41T66 is a low-power serial real-time clock (RTC) with a built-in 32.768 kHz oscillator (external crystal controlled). Eight registers are used for the clock/calendar function and are configured in binary coded decimal (BCD) format. An additional 8 registers provide status/control of alarm, square wave, calibration, and watchdog functions. Addresses and data are transferred serially via a two line, bidirectional I²C interface. The built-in address register is incremented automatically after each WRITE or READ data byte. Functions available to the user include a time-of-day clock/calendar, alarm interrupts, programmable square wave output, and watchdog output. The eight clock address locations contain the century, year, month, date, day, hour, minute, second and tenths/hundredths of a second in 24-hour BCD format. Corrections for 28-, 29- (leap year), 30- and 31-day months are made automatically.
The M41T66 is supplied in a 16-pin QFN.

所有功能
Counters for tenths/hundredths of seconds, seconds, minutes, hours, day, date, month, year, and century

32 KHz crystal oscillator integrating load capacitance and high crystal series resistance operation

Oscillator stop detection monitors clock operation

Serial interface supports I²C bus (400 kHz)

525 nA timekeeping current at 3 V

Low operating current of 35 μA (at 400 kHz)

Timekeeping down to 1.0 V

1.3 V to 4.4 V I²C bus operating voltage

Allows use in lithium ion rechargeable applications
32 KHz square wave on power-up to drive a microcontroller in low-power mode

Programmable (1 Hz to 32 KHz) square wave

Programmable alarm with interrupt function

Accurate programmable watchdog (from 62.5 ms to 31 min)

Software clock calibration to compensate deviation of crystal due to temperature

Automatic leap year compensation

Operating temperature of –40 to 85 °C

Lead-free 16-pin QFN package
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Low-power, real-time clock ICs for portable and wearable devices

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Clocks and Timers Software

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STSW-SRTC001	批量生产	串行RTC的I2C代码	时钟与定时电路软件	ST	STSW-SRTC001 描述: 串行RTC的I2C代码
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	Resource title		Latest update

产品规格 (1)

	Resource title		Latest update
PDF	DS5956 具有报警功能的串行实时时钟 2.0		19 Sep 2016	19 Sep 2016 DS5956 具有报警功能的串行实时时钟 2.0

应用手册 (5 of 8)

	Resource title	Latest update
PDF	AN3060 串行实时时钟（RTC）应用指南 1.0	13 Sep 2018	13 Sep 2018 AN3060 串行实时时钟（RTC）应用指南 1.0
PDF	AN1011 ST NVRAM 和实时时钟（RTC）产品中使用的电池技术 4.0	15 Feb 2015	15 Feb 2015 AN1011 ST NVRAM 和实时时钟（RTC）产品中使用的电池技术 4.0
PDF	AN934 How to use the digital calibration feature in TIMEKEEPER® and serial real-time clock (RTC) products 4.1	19 Mar 2021	19 Mar 2021 AN934 How to use the digital calibration feature in TIMEKEEPER® and serial real-time clock (RTC) products 4.1
PDF	AN1216 Implementing a periodic alarm with TIMEKEEPER® and serial real-time clocks (RTCs) 2.0	19 Mar 2021	19 Mar 2021 AN1216 Implementing a periodic alarm with TIMEKEEPER® and serial real-time clocks (RTCs) 2.0
PDF	AN4641 集成TIMEKEEPER® 与实时时钟监控器功能 1.0	14 May 2015	14 May 2015 AN4641 集成TIMEKEEPER® 与实时时钟监控器功能 1.0
PDF	AN923 Managing century information using serial real-time clocks and TIMEKEEPER® NVRAMs 4.0	19 Mar 2021	19 Mar 2021 AN923 Managing century information using serial real-time clocks and TIMEKEEPER® NVRAMs 4.0
PDF	AN1572 串行实时时钟（RTC）的掉电时间戳功能 2.0	03 Apr 2013	03 Apr 2013 AN1572 串行实时时钟（RTC）的掉电时间戳功能 2.0
PDF	AN1336 Power-fail comparator for NVRAM supervisory devices 2.0	13 Sep 2018	13 Sep 2018 AN1336 Power-fail comparator for NVRAM supervisory devices 2.0

手册 (1)

	Resource title		Latest update
PDF	Serial real-time clock ICs 1.0		26 Feb 2020	26 Feb 2020 Serial real-time clock ICs 1.0

EDA Symbols, Footprints and 3D Models

质量与可靠性

产品型号	Marketing Status	封装	等级规格	符合RoHS级别	材料声明**
M41T66Q6F	批量生产	QFN-16L	工业	Ecopack2	PDF XML

M41T66Q6F

Package:

QFN-16L

Material Declaration**:

PDF XML

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(**) st.com上提供的材料声明表单可能是基于包装系列中最常用的封装的通用文档。因此，它们可能不是100%适用于特定的设备。有关特定设备的信息，请联系销售支持。

样片和购买

	产品型号	从分销商订购	从ST订购	供货状态	ECCN (US)	ECCN (EU)	包装类型	封装	温度（ºC）		NVRAM size (B)	Country of Origin	Budgetary Price (US$)*/Qty	更多信息
	产品型号	从分销商订购	从ST订购	供货状态	ECCN (US)	ECCN (EU)	包装类型	封装	最小值	最大值	NVRAM size (B)	Country of Origin	Budgetary Price (US$)*/Qty	更多信息
	M41T66Q6F	无法联系到经销商，请联系我们的销售办事处	Buy Direct	批量生产	EAR99	NEC	Tape And Reel	QFN-16L	-40	85	-	MALAYSIA	0.823 / 1k	更多信息 NVRAM size (B): - Country of Origin: MALAYSIA