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MT88L89

Features: • Central office quality DTMF transmitter/ receiver• Low voltage operation (2.7-3.6V)• Adjustable guard time• Automatic tone burst mode• Call progress tone detection to -30dBm• Adaptive micro interface enables compatibility with existing MT8880/MT8888 ...

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MT88L89: Features: • Central office quality DTMF transmitter/ receiver• Low voltage operation (2.7-3.6V)• Adjustable guard time• Automatic tone burst mode• Call progress tone de...

MT88L89 Data Sheet

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Part Number:
MT88L89
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/11/26

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Product Details

Description



Features:

• Central office quality DTMF transmitter/ receiver
• Low voltage operation (2.7-3.6V)
• Adjustable guard time
• Automatic tone burst mode
• Call progress tone detection to -30dBm
• Adaptive micro interface enables compatibility with existing MT8880/MT8888 designs
• DTMF transmitter/receiver power down via register control


Application

• Credit card systems
• Paging systems
• Repeater systems/mobile radio
• Interconnect dialers
• Personal computers


Pinout

Connection Diagram


Specifications

  Parameter Symbol Min Max Units
1 Power supply voltage VDD-VSS VDD   6 V
2 Voltage on any pin VI VSS-0.3 VDD+0.3 V
3 Current at any pin (Except VDD and VSS)     10 mA
4 Storage temperature TST -65 + 150 °C
5 Package power dissipation PD   1000 mW
* Exceeding these values may cause permanent damage. Functional operation under these conditions is not implied.


Description

The MT88L89 is a monolithic DTMF transceiver with call progress filter. It is fabricated in CMOS technology offering low power consumption and high reliability.

The receiver section of MT88L89 is based upon the industry standard MT8870 DTMF receiver while the transmitter utilizes a switched capacitor D/A converter for low distortion, high accuracy DTMF signalling. Internal counters provide a burst mode such that tone bursts can be transmitted with precise timing. A call progress filter of MT88L89 can be selected allowing a microprocessor to analyze call progress tones.

The MT88L89 utilizes an adaptive micro interface, which allows the device to be connected to a number of popular microcontrollers with minimal external logic. The MT88L89 provides enhanced power down features. The transmitter and receiver may independently be powered down via register control.




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