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CM145446A

Features: • Single 5 V Power Supply• Compatible with CCITT V.21• DTMF Generator and Receiver for All 16 Standard Digits• Capable of Driving 0 dBm into a 600 W Load (VCC = 5 V)• AGC (Auto Gain Control) Amplifier for DTMF Receiver• Imprecise Call Progress Tone (40...

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SeekIC No. : 004314249 Detail

CM145446A: Features: • Single 5 V Power Supply• Compatible with CCITT V.21• DTMF Generator and Receiver for All 16 Standard Digits• Capable of Driving 0 dBm into a 600 W Load (VCC = 5 V...

CM145446A Data Sheet

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Part Number:
CM145446A
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: 2024/4/29

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Product Details

Description



Features:

• Single 5 V Power Supply
• Compatible with CCITT V.21
• DTMF Generator and Receiver for All 16 Standard Digits
• Capable of Driving 0 dBm into a 600 W Load (VCC = 5 V)
• AGC (Auto Gain Control) Amplifier for DTMF Receiver
• Imprecise Call Progress Tone (400 Hz) Detector
• A Transmit Attenuator Programmable in 1 dB Steps
• 2100 Hz Answer Tone Generator
• Serial Control Interface
• Analog Loopback Configuration for Self Test
• PowerDown Mode, Less than 1 mA


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

The MC145446A is a silicon gate CMOS frequency shift keying (FSK) modem intended for use with telemeter systems or remote control systems over the telephone network. It replaces the MC145446.

CM145446A 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/receiver 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.

CM145446A also includes a serial control interface and internal control and status registers that permit a CPU to exercise the following builtin features:




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