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Description
TELEFUNKEN microelectronic’s low voltage speech and ringer interface circuit, U4037B, is designed for electronic telephone sets. It performs all necessary speech, line interface functions, and the tone ringer. The circuit is line powered and contains all components necessary for signal amplification and adaption to the line. The power supply of U4037B also provides power to the MCU during the ringing and speech mode.
Specifications and features
Speech Circuit
- Adjustable dc characteristic
- Symmetrical input of microphone amplifier
- Receiving amplifier for dynamic or piezo-electric earpieces
- Automatic line loss compensation
- MCU controlled earphone gain 8 dB
- Anti-clipping in transmit direction
Tone Ringer Interface
- Adjustable volume via 2 bit D/A converter
- Adjustable threshold
- MCU power supply
Application Scenarios
U4037B is suitable for standard telephones and fax machines.
Comparison
Advantages- Low number of external components
Disadvantages- No specific disadvantages identified
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Similar parts: 430483 , Click to view
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Datasheet
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Shopping guide
Delivery period:
- - Will ship out in 2-3 days
- - DHL Express: 3-7 business days
- - DHL eCommerce: 12-22 business days
- - FedEx International Priority: 3-7 business days
- - EMS: 10-15 business days
Shipping fee:
- - Automatic Email notification (above 5 times)
- - View in your order page
Shipping option:
DHL, FedEx, EMS, SF Express, and Registered Air MailShipping tracking:
- - Automatic Email notification (above 5 times)
- - View in your order page
How to Buy:
- - In-stock, Add to cart > Check out > Submit order > Complete payment >Delivery.
- - Inquiry, Add to inquiry sheet/Submit bom/inquire file/Send email us > Quote > Place order > Complete payment >Delivery.
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Payment:
- - Paypal,Credit Card includes Visa, Master, American Express.
- - Wire transfer, include Local bank transfer.
- - Western Union.
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Additional Information
- Datasheet: Download U4037B
- Chipdatas Part: CD92-U4037B
- Warehouse: China, Hong Kong
- Dispatch: Within 24 hours
- Free Shipping: Yes
- Prority Shipping: Yes, 3-5 days
- Last Updated: 2024/06/03 08:14 +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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Payment Method
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The fee is charged according to the rule of PayPal.
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The fee is charged according to the rule of PayPal.
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Western Union charge US$0.00 banking fee.
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We recommend to use bank transfer for large orders to save on handling fees.
Shipping Tips
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Registered Mail(www.singpost.com)
Free shipping without minimum order.