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Description
The STWCQ142E is an integrated circuit (IC) chip categorized under the product category of IC chips. It is specifically designed to function as a low power combined PCM CODEC/FILTER device to implement the audio front-end functions required by low voltage/low power consumption digital cellular terminals. STWCQ142E can be configured either as a 14-bit linear or as an 8-bit companded PCM coder.
Specifications and features
- 14 bit linear analog to digital and digital to analog converters
- 8 bit companded analog to digital and digital to analog converters ALAW or µ-LAW
- Transmit and receive band-pass filters
- Active antialias noise filter
- One microphone biasing output
- Remote control (remocon) function
- Three switchable microphone amplifier inputs gain programmable: 0 . . 42.5 dB amplifier, 1.5 dB steps (+ mute)
- Earpiece audio output attenuation programmable: 0 . . 30 dB, 2 dB steps
- External audio output attenuation programmable: 0 . . 30 dB, 2 dB steps
- Driving capability: 140mW over 8Ω
- Transient suppression signal during power on and during amplifier switching
- Internal programmable sidetone circuit attenuation programmable: 16 dB range, 1 dB step
- Internal ring, tone and DTMF generator, sinewave or squarewave waveforms. Attenuation programmable: 27dB range, 3dB step. Three frequency ranges:
- 3.9Hz . . . . 996Hz, 3.9Hz step
- 7.8Hz . . . . 1992Hz, 7.8Hz step
- 15.6Hz . . . . 3984Hz, 15.6Hz step
- Programmable pulse width modulated buzzer driver output
- Single 2.7V to 3.3V supply
- Extended temperature range operation (*) -40°C to 85°C
- 1.0µW standby power (typ. at 2.7V)
- 13mW operating power (typ. at 2.7V)
- 1.8V to 3.3V CMOS compatible digital interfaces
- Programmable PCM and control interface microwire compatible
Application Scenarios
The STWCQ142E IC chip is commonly used in the following:
- GSM/DCS1800/PCS1900/JDC digital cellular telephones
- CDMA cellular telephones
- DECT/CT2/PHS digital cordless telephones
- Battery-operated audio front-ends for DSPs
Comparison
Advantages- Low power consumption
- High performance
- Extended temperature range operation
- Programmable functions
- PCM interface supports both non-delayed and delayed frame synchronization modes
- Complete CODEC and FILTER system including transmit and receive band-pass filters and active antialias noise filter
- Multiple microphone amplifier inputs with programmable gain
- Programmable sidetone circuit and ring/tone/DTMF generator capabilities
Disadvantages- Restricted audio output attenuation of 0 to 30 dB, 2 dB steps
- Single 2.7V to 3.3V supply, not suitable for other voltage levels
- Limited to specific phone and audio front-end applications
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Datasheet
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Shopping guide
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Additional Information
- Datasheet: Download STWCQ142E
- Chipdatas Part: CD88-STWCQ142E
- Warehouse: China, Hong Kong
- Dispatch: Within 24 hours
- Free Shipping: Yes
- Prority Shipping: Yes, 3-5 days
- Last Updated: 2024/10/01 00:19 +0800
Refund
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- Full Refund if you don't receive your order
- Full or Partial Refund , If the item is not as described
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