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MFG:MOTOROLA  Package Cooled:SMD  D/C:1165  

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Part Number: MC145444

 

MFG: MOTOROLA

Package Cooled: SMD

D/C: 1165

Description: MC145444 is a silicon gate CMOS frequency shift keying (FSK) modem intended for use with telemeter sys...


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MC145444 General 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.

This device 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. Devices functions are controlled through a 3wire serial interface.

MC145444 Maximum Ratings

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

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 OnChip
• Analog Loopback Configuration for Self Test
• Simplex, HalfDuplex, and FullDuplex Operation

MC145444 Connection Diagram

MC145444  Connection Diagram

MC145444 datasheet

MC145444
PDF/DataSheet Download

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MC145444 Relative Products

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    MC145443B

    The MC145442B and MC145443B silicongate CMOS singlechip low speed modems contain a complete frequency shift keying (FSK) modulator, demodulator, and filter. These devices are compatible with CCITT V.21(MC145442B) and Bell 103 (MC145443B) specifications. Both...

  • MC145443ADW

    MC145443ADW

    The MC145443ADW is designed as one kind of singlechip lowspeed modems and contains a complete frequency shift keying (FSK) modulator, demo-dulator, and filter.Specifications of it are CCITT V.21 (MC145442) and Bell 103 (MC145443).MC145443ADW provides fulldup...

  • MC145442P

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    The MC145442P is designed as one kind of singlechip lowspeed modems and contains a complete frequency shift keying (FSK) modulator, demodulator, and filter.Specifications of it are CCITT V.21 (MC145442) and Bell 103 (MC145443).MC145442P provides fullduplex o...

  • MC145442DW

    MC145442DW

    The MC145442DW is designed as one kind of singlechip lowspeed modems and contains a complete frequency shift keying (FSK) modulator, demodulator, and filter.Specifications of it are CCITT V.21 (MC145442) and Bell 103 (MC145443).It provides fullduplex or half...

  • MC145442B

    MC145442B

    The MC145442B and MC145443B silicongate CMOS singlechip low speed modems contain a complete frequency shift keying (FSK) modulator, demodulator, and filter. These devices are compatible with CCITT V.21(MC145442B) and Bell 103 (MC145443B) specifications. Both...

  • MC145442

    MC145442

    The MC145442 is a kind of silicon-gate CMOS single-chip low-speed modem. It includes a complete frequency shift keying (FSK) modulator, demodulator, and filter. Besides, the MC145442 includes a carrier detect circuit for the demodulator section and a duplexe...

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