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M41T00AUD

更新时间： 2024-11-19 02:55:11

品牌	Logo	应用领域
意法半导体 - STMICROELECTRONICS		时钟
页数	文件大小	规格书
44页	333K
描述
Serial real-time clock with audio

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中文翻译

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数据手册

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M41T00AUD 数据手册

M41T00AUD

Serial real-time clock with audio

Features

■ Combination real-time clock with audio

– Serial RTC based on M41T00

– Audio section provides:

–

300mW differential audio amplifier

256 and 512Hz tone generation

-33 to +12dB gain, 3dB steps (16 steps

plus MUTE)

DFN16 (5mm x 4mm)

“D” Suffix

■ Real-time clock details:

– Superset of M41T00

– 3.0 to 3.6V operation

■ Audio section

– Power amplifier

–

Timekeeping down to 1.7V

–

Differential output amplifier

– Automatic backup switchover circuit

Provides 300mW into 8Ω (THD+N = 2%

(max), f = 1kHz)

–

Ultra low 400nA backup current at 3.0V

(typ)

– Summing node at audio input

–

Suitable for battery or capacitor backup

–

Inverting configuration with summing

resistors into the minus (-) terminal

On-chip trickle charge circuit for backup

capacitor

–

0dB gain with 10kΩ feedback resistor

and 20kΩ input summing resistors

– 400kHz I C bus

– M41T00 compatible register set with

counters for seconds, minutes, hours, day,

date, month, years, and century

–

Signal input centered at V /2

1.6V

analog input range (max)

P-P

– 256 or 512 Hz signal multiplexing with

analog input to provide audio with beep

tones

–

Automatic leap year compensation

HT bit set when clock goes into backup

mode

– Volume control, 4-bit register

– RTC operates using 32,768Hz quartz

crystal

–

Allows gain adjustment from -33dB to

+12dB

–

Calibration register provides for

adjustments of -63 to +126ppm

–

3dB steps

MUTE bit

–

Oscillator supports crystals with up to

40kΩ series resistance, 12.5pF load

capacitance

– Audio automatically shuts off in backup

mode

■ 0°C to 70°C operation

– Oscillator fail detect circuit OF bit indicates

when oscillator has stopped for four or

more cycles

■ Small DFN16 package (5mm x 4mm)

December 2007

Rev 2

1/44

www.st.com

12 3 4 5 6 7...44

中文翻译

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