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产品名称：M41T00AUD
产品封装：DFN-16
产品品牌：STMicroelectronics
PDF文档：下载
库 存：查看
电 话：0755-83035811
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产品介绍
M41T00AUD
Features
- 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)
- Small DFN16 package (5 mm x 4 mm)
- Real-time clock details
- 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
- 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), fin= 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 VDD/2
- 1.6 VP-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
- Audio automatically shuts off in backup mode
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