MT8840

Features: • Performs ASK (amplitude shift keyed) modulation and demodulation• 32 kHz carrier frequency• Up to 2 kbit/s full duplex data transfer rate• On-chip oscillator• On-chip tone caller for alerting functions• Adjustable tone caller frequencies• Selec...

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MT8840 Picture
SeekIC No. : 004430061 Detail

MT8840: Features: • Performs ASK (amplitude shift keyed) modulation and demodulation• 32 kHz carrier frequency• Up to 2 kbit/s full duplex data transfer rate• On-chip oscillator̶...

floor Price/Ceiling Price

Part Number:
MT8840
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:

• Performs ASK (amplitude shift keyed) modulation and demodulation
• 32 kHz carrier frequency
• Up to 2 kbit/s full duplex data transfer rate
• On-chip oscillator
• On-chip tone caller for alerting functions
• Adjustable tone caller frequencies
• Selectable self-loop test mode
• 5V/2.5mA power supply
• ISO2-CMOS and switched capacitor technologies
• 18 Pin DIP



Application

• Simultaneous data and voice communication in PABXs
• 2 kbit/s data modem
• "Smart" telephone sets



Specifications

Parameter Symbol Min Max
Units
1 Supply Voltage VDD-VSS
0.3 +7.0 V
2 Supply Voltage VMax VSS-0.3 VDD+0.3 V
3 Current On Any Pin IMax   20 mA
4 Storage temperature TS -65 +150
5 Package power dissipation PDiss
  850
mW



Description

The MT8840 is a carrier over voice modem which allows simultaneous transfer of voice and data over a single pair of wires. Data is transferred on an amplitude shift keyed (ASK) 32 kHz carrier. On-chip filters remove voice frequency signals from the received composite voice and data signal prior to demodulation. The modulating signal of MT8840 is a bit stream with a typical data rate of 2 kbit/s. In addition, the device contains a two tone warbler which functions as a telephone ringer. The MT8840 is fabricated in MITEL's double-poly ISO2-CMOS technology utilizing switched-capacitor techniques.




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