M41T00AUD

批量生产
Design Win

串行实时时钟(RTC)和音频功能

下载数据手册

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 VCCis 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), 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
        • 3 dB steps
        • MUTE bit
      • Audio automatically shuts off in backup mode

EDA符号、封装和3D模型

STMicroelectronics - M41T00AUD

Speed up your design by downloading all the EDA symbols, footprints and 3D models for your application. You have access to a large number of CAD formats to fit with your design toolchain.

Please select one model supplier :

Symbols

符号

Footprints

封装

3D model

3D模型

质量与可靠性

产品型号 Marketing Status 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**:

Marketing Status

批量生产

Package

QFN-16L P 0.5 mm

Grade

Industrial

RoHS Compliance Grade

Ecopack2

(**) 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

Swipe or click the button to explore more details Don't show this again
产品型号
供货状态
Budgetary Price (US$)*/Qty
从ST订购
Order from distributors
包装类型
RoHS
Country of Origin
ECCN (US)
ECCN (EU)
Operating temperature (°C)
NVRAM size (B)
最小值
最大值
M41T00AUDD1F
Available at distributors

经销商的可用性 M41T00AUDD1F

代理商名称
地区 库存 最小订购量 第三方链接

代理商库存报告日期:

无法联系到经销商,请联系我们的销售办事处

M41T00AUDD1F 批量生产

Budgetary Price (US$)*/Qty:
-
包:
包装类型:
RoHS:
Country of Origin:
ECCN (US):
ECCN (EU):

产品型号:

M41T00AUDD1F

Operating Temperature (°C)

Min:

Max:

NVRAM size (B):

-

Swipe or click the button to explore more details Don't show this again

(*) 建议转售单价(美元)仅用于预算用途。如需以当地货币计价的报价,请联系您当地的 ST销售办事处 或我们的 经销商