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M-8888

Features: · Advanced CMOS technology for low power consumption and increased noise immunity · Complete DTMF transmitter/receiver in a single chip · Standard 8051, 8086/8 microprocessor port · Central office quality and performance · Adjustable guard time · Automatic tone burst mode · Call progress...

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SeekIC No. : 004407338 Detail

M-8888: Features: · Advanced CMOS technology for low power consumption and increased noise immunity · Complete DTMF transmitter/receiver in a single chip · Standard 8051, 8086/8 microprocessor port · Centra...

M-8888 Data Sheet

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Part Number:
M-8888
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: 2024/4/27

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Product Details

Description



Features:

· Advanced CMOS technology for low power consumption and increased noise immunity
· Complete DTMF transmitter/receiver in a single chip
· Standard 8051, 8086/8 microprocessor port
· Central office quality and performance
· Adjustable guard time
· Automatic tone burst mode
· Call progress mode
· Single +5 Volt power supply
· 20-pin DIP and SOIC packages
· 2 MHz microprocessor port operation
· Inexpensive 3.58 MHz crystal




Application

· Paging systems
· Repeater systems/mobile radio
· Interconnect dialers
· PBX systems
· Computer systems
· Fax machines
· Pay telephone
· Credit card verification




Pinout

Connection Diagram


Specifications

Parameter Symbol Value
Power supply voltage (VDD - VSS) VDD +6.0 V max
Voltage on any pin Vdc VSS -0.3 V, VDD + 0.3 V
Current on any pin IDD 10 mA max
Operating temperature TA -40 to +85
Storage temperature TS -65 to +150

Note: Exceeding these ratings may cause permanent damage. Functional operation under these conditions is not implied.


Description

The M-8888 is a complete DTMF Transmitter Receiver that features adjustable guard time, automatic tone burst mode, call progress mode, and a fully compatible 8051, 8086/8 microprocessor interface. The receiver portion is based on the industry standard M-8870 DTMF Receiver, while the transmitter uses a switched-capacitor digital-to-analog converter for lowdistortion, highly accurate DTMF signaling. Tone bursts can be transmitted with precise timing by making use of the automatic tone burst mode. To analyze call progress tones, a call progress filter can be selected
by an external microprocessor.




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