产品概述

描述

The M41T00AUD is a low-power serial real-time clock (RTC) with an integral audio section with tone generator and 300 mW output amplifier. The RTC is a superset of the M41T00 with enhancements such as a precision reference for switchover, an oscillator fail detect circuit, and storing of the time at power-down. The audio section includes a summing amplifier (inverting) at the input. An 8 kHz low-pass filter follows that with a 16-step programmable gain stage next. A 256 or 512 Hz audio tone can be switched into the filter in place of the input signal. From the gain stage, the 300 mW amplifier drives the output pins. The M41T00AUD has a built-in power sense circuit which detects power failures and automatically switches to the backup input when V_CCis removed. Backup power can be supplied by a capacitor or by a battery such as a lithium coin cell. The device includes a trickle charge circuit for charging the capacitor.
The RTC includes a built-in 32.768 kHz oscillator controlled by an external crystal. Eight register bytes are used for the clock/calendar functions and are superset compatible with the M41T00. Two additional registers control the audio section and the trickle charger. The 10 registers are accessed over a 400 kHz I²C bus. The address register increments automatically after each byte READ or WRITE operation thus streamlining transfers by eliminating the need to send a new address for each byte to be transferred.
Typical data retention times will be in excess of 5 years with a 50 mAh 3 V lithium cell.

所有功能
Combination real-time clock with audio

Serial real-time clock (RTC) based on M41T00

Audio section provides:
300 mW differential audio amplifier
256 and 512 Hz tone generation
–33 to +12 dB gain, 3 dB steps (16 steps plus MUTE)

0 °C to 70 °C operation

Small DFN16 package (5 mm x 4 mm)

Real-time clock details

Superset of M41T00

3.0 to 3.6 V operation
Timekeeping down to 1.7 V

Automatic backup switchover circuit
Ultra-low 400 nA backup current at 3.0 V (typ)
Suitable for battery or capacitor backup
On-chip trickle charge circuit for backup capacitor

400 kHz I²C bus

M41T00 compatible register set with counters for seconds, minutes, hours, day, date, month, years, and century
Automatic leap year compensation
HT bit set when clock goes into backup mode

RTC operates using 32,768 Hz quartz crystal
Calibration register provides for adjustments of –63 to +126 ppm
Oscillator supports crystals with up to 40 kΩ series resistance, 12.5 pF load capacitance

Oscillator fail detect circuit OF bit indicates when oscillator has stopped for four or more cycles

Audio section

Power amplifier
Differential output amplifier
Provides 300 mW into 8 Ω(THD+N = 2% (max), f_in= 1 kHz)

Summing node at audio input
Inverting configuration with summing resistors into the minus (-) terminal
0 dB gain with 10 kΩ feedback resistor and 20 kΩ input summing resistors
Signal input centered at V_DD/2
1.6 V_P-Panalog input range (max)

256 or 512 Hz signal multiplexing with analog input to provide audio with beep tones

Volume control, 4-bit register
Allows gain adjustment from –33 dB to +12 dB
3 dB steps
MUTE bit

Audio automatically shuts off in backup mode
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	产品型号	状态	描述	类型	供应商
Worldwide,Asia,Europe,Africa,North America,South America,Oceania,Afghanistan,Bahrain,Bangladesh,Bhutan,Brunei,Burma (Myanmar),Cambodia,China,East Timor,India,Indonesia,Iraq,Japan,Jordan,Kazakhstan,Kuwait,Kyrgyzstan,Laos,Malaysia,Maldives,Mongolia,Nepal,Oman,Pakistan,Philippines,Qatar,Russian Federation,Saudi Arabia,Singapore,South Korea,Sri Lanka,Taiwan,Tajikistan,Thailand,Turkmenistan,United Arab Emirates,Uzbekistan,Vietnam,Yemen,Albania,Andorra,Armenia,Austria,Azerbaijan,Belarus,Belgium,Bosnia and Herzegovina,Bulgaria,Croatia,Cyprus,Czech Republic,Denmark,Estonia,Finland,France,Georgia,Germany,Greece,Hungary,Iceland,Ireland,Israel,Italy,Latvia,Liechtenstein,Lithuania,Luxembourg,Macedonia,Malta,Moldova,Monaco,Montenegro,Netherlands,Norway,Poland,Portugal,Romania,San Marino,Serbia,Slovakia,Slovenia,Spain,Sweden,Switzerland,Turkey,Ukraine,United Kingdom,Vatican City,Algeria,Angola,Benin,Botswana,Burkina,Burundi,Cameroon,Cape Verde,Central African Republic,Chad,Comoros,Democratic Republic of Congo,Djibouti,Egypt,Equatorial Guinea,Eritrea,Ethiopia,Gabon,Gambia,Ghana,Guinea,Guinea-Bissau,Ivory Coast,Kenya,Lesotho,Liberia,Libya,Madagascar,Malawi,Mali,Mauritania,Mauritius,Morocco,Mozambique,Namibia,Niger,Nigeria,Rwanda,Sao Tome and Principe,Senegal,Seychelles,Sierra Leone,Somalia,South Africa,Swaziland,Tanzania,Togo,Tunisia,Uganda,Zambia,Zimbabwe,Antigua and Barbuda,Bahamas,Barbados,Belize,Canada,Costa Rica,Dominica,Dominican Republic,El Salvador,Grenada,Guatemala,Haiti,Honduras,Jamaica,Mexico,Nicaragua,Panama,Saint Kitts and Nevis,Saint Lucia,Saint Vincent and the Grenadines,Trinidad and Tobago,United States,Argentina,Bolivia,Brazil,Chile,Colombia,Ecuador,Guyana,Paraguay,Peru,Suriname,Uruguay,Venezuela,Australia,Fiji,Kiribati,Marshall Islands,Micronesia,Nauru,New Zealand,Palau,Papua New Guinea,Samoa,Solomon Islands,Tonga,Tuvalu,Vanuatu	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
Worldwide,Asia,Europe,Africa,North America,South America,Oceania,Afghanistan,Bahrain,Bangladesh,Bhutan,Brunei,Burma (Myanmar),Cambodia,China,East Timor,India,Indonesia,Iraq,Japan,Jordan,Kazakhstan,Kuwait,Kyrgyzstan,Laos,Malaysia,Maldives,Mongolia,Nepal,Oman,Pakistan,Philippines,Qatar,Russian Federation,Saudi Arabia,Singapore,South Korea,Sri Lanka,Taiwan,Tajikistan,Thailand,Turkmenistan,United Arab Emirates,Uzbekistan,Vietnam,Yemen,Albania,Andorra,Armenia,Austria,Azerbaijan,Belarus,Belgium,Bosnia and Herzegovina,Bulgaria,Croatia,Cyprus,Czech Republic,Denmark,Estonia,Finland,France,Georgia,Germany,Greece,Hungary,Iceland,Ireland,Israel,Italy,Latvia,Liechtenstein,Lithuania,Luxembourg,Macedonia,Malta,Moldova,Monaco,Montenegro,Netherlands,Norway,Poland,Portugal,Romania,San Marino,Serbia,Slovakia,Slovenia,Spain,Sweden,Switzerland,Turkey,Ukraine,United Kingdom,Vatican City,Algeria,Angola,Benin,Botswana,Burkina,Burundi,Cameroon,Cape Verde,Central African Republic,Chad,Comoros,Democratic Republic of Congo,Djibouti,Egypt,Equatorial Guinea,Eritrea,Ethiopia,Gabon,Gambia,Ghana,Guinea,Guinea-Bissau,Ivory Coast,Kenya,Lesotho,Liberia,Libya,Madagascar,Malawi,Mali,Mauritania,Mauritius,Morocco,Mozambique,Namibia,Niger,Nigeria,Rwanda,Sao Tome and Principe,Senegal,Seychelles,Sierra Leone,Somalia,South Africa,Swaziland,Tanzania,Togo,Tunisia,Uganda,Zambia,Zimbabwe,Antigua and Barbuda,Bahamas,Barbados,Belize,Canada,Costa Rica,Dominica,Dominican Republic,El Salvador,Grenada,Guatemala,Haiti,Honduras,Jamaica,Mexico,Nicaragua,Panama,Saint Kitts and Nevis,Saint Lucia,Saint Vincent and the Grenadines,Trinidad and Tobago,United States,Argentina,Bolivia,Brazil,Chile,Colombia,Ecuador,Guyana,Paraguay,Peru,Suriname,Uruguay,Venezuela,Australia,Fiji,Kiribati,Marshall Islands,Micronesia,Nauru,New Zealand,Palau,Papua New Guinea,Samoa,Solomon Islands,Tonga,Tuvalu,Vanuatu	STSW-SRTC002	批量生产	SPI代码 - 串行RTC	时钟与定时电路软件	ST	STSW-SRTC002 描述: SPI代码 - 串行RTC

EDA符号、封装和3D模型

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**
M41T00AUDD1F	批量生产	QFN-16L P 0.5 mm	工业	Ecopack2

M41T00AUDD1F

Package:

QFN-16L P 0.5 mm

Material Declaration**:

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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。

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	产品型号	Order from distributors	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$)*/Qty	NVRAM size (B)	Country of Origin
	产品型号	Order from distributors	从ST订购	供货状态	ECCN (US)	ECCN (EU)	包装类型	封装	最小值	最大值	NVRAM size (B)	Country of Origin	Budgetary Price (US$)*/Qty	NVRAM size (B)	Country of Origin
	M41T00AUDD1F	无法联系到经销商，请联系我们的销售办事处	Buy Direct Free Sample	批量生产	EAR99	NEC	Tape and Reel	QFN-16L P 0.5 mm	0	70	-	MALAYSIA		-	MALAYSIA