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MC145444

Features: • Capable of Driving 0 dBm into a 600 W Load• DTMF Generator OnChip• Imprecise Call Progress Detector OnChip• A Transmit Attenuator Programmable in 1 dB Steps• 3Wire Serial Interface• Compatible with CCITT V.21• 2100 Hz Answer Tone Generator OnCh...

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MC145444: Features: • Capable of Driving 0 dBm into a 600 W Load• DTMF Generator OnChip• Imprecise Call Progress Detector OnChip• A Transmit Attenuator Programmable in 1 dB Steps•...

MC145444 Data Sheet

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Part Number:
MC145444
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: 2024/11/27

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Product Details

Description



Features:

• Capable of Driving 0 dBm into a 600 W Load
• DTMF Generator OnChip
• Imprecise Call Progress Detector OnChip
• A Transmit Attenuator Programmable in 1 dB Steps
• 3Wire Serial Interface
• Compatible with CCITT V.21
• 2100 Hz Answer Tone Generator OnChip
• Analog Loopback Configuration for Self Test
• Simplex, HalfDuplex, and FullDuplex Operation


Pinout

Connection Diagram


Specifications

Rating Symbol Value Unit
DC Supply Voltage VCC 0.5 to + 7.0 V
DC Input Voltage Vin 0.5 to VCC + 0.5 V
DC Output Voltage Vout 0.5 to VCC + 0.5 V
Clamp Diode Current per Pin IIK, IOK ± 20 mA
DC Current per Pin Iout ± 25 mA
Power Dissipation PD 500 mW
Storage Temperature Range Tstg 65 to + 150 °C



Description

MC145444 is a silicon gate CMOS frequency shift keying (FSK) modem intended for use with telemeter systems or remote control systems over the telephone network.

MC145444 is compatible with CCITT V.21 and contains the entire circuit that provides a fullduplex or halfduplex 300baud data communication over a pair of telephone lines. This device also includes the DTMF generator and call progress tone detector (CPTD).

The differential line driver has the capability of driving 0 dBm into a 600 W load with a single +5 V power supply.

The transmit level is controlled by the programmable attenuator in 1 dB steps. MC145444 functions are controlled through a 3wire serial interface.




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