MC145028P

The MC145028P is a flexible and efficient dual-tone multi-frequency (DTMF) encoder integrated circuit designed by NXP Semiconductors
5,788 Effective Inventory

MC145028P

Effective Inventory5,788

The MC145028P is a flexible and efficient dual-tone multi-frequency (DTMF) encoder integrated circuit designed by NXP Semiconductors

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Service & Packaging

Service & Packaging

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MC145028P DataSheet
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Please submit RFQ for MC145028P or email to us: Email: [email protected], we will contact you in 12 hours.

Details

Motorola's MC145028P is a dual-tone multifrequency (DTMF) receiver IC that excels in decoding DTMF signals from telephone keypads. With its wide frequency range of 300 to 3,400 Hz, built-in band-split filter, and digital counting techniques, it offers reliable and accurate DTMF decoding for digits 0-9 and symbols like * and #. Its digital interface also enables seamless integration with microcontrollers or digital systems, making it a versatile choice for a range of telecommunications applications, including telephone systems, IVR systems, and remote control systems

Key Features

  • Eight-channel, 3-wire serially controlled volume attenuator
  • Each channel programmable from 0dB to -95.5dB
  • 256-step logarithmic volume control
  • Power-on reset to all muted channels
  • Serial data input with daisy-chain output for multiple device cascading
  • Low power consumption

Application

  • Industrial automation
  • Remote monitoring and control systems
  • Security systems
  • Home automation
  • Data acquisition systems
  • Telecommunications
  • Building automation
  • Robotics
  • Automotive applications
  • Medical devices

Specifications

The followings are basic parameters of the part selected concerning the characteristics of the part and categories it belongs to.

Product Category ! NXP Semiconductors Brand NXP Semiconductors

Specification Comparison

MC145028P vs MC145028 vs MC14502B MC145028P vs MC145026D vs MC145026

Datasheet PDF

Datasheets record the features, absolute maximum ratings, applications and more of the device, which benefit a lot as an overall guide to the specific application of the part.

Preliminary Specification MC145028P PDF Download

FAQs

What is MC145028P?

The MC145028P is a dual-tone multiple frequency (DTMF) receiver integrated circuit (IC) designed by Motorola. It is widely used for decoding DTMF signals generated by telecommunication systems, telephone keypads, and remote control applications.

How Does MC145028P Work?

The MC145028P works by detecting and decoding DTMF signals received from the input audio signal. It utilizes bandpass filters and digital signal processing techniques to identify the specific frequencies corresponding to the pressed keys on a telephone keypad. The IC then outputs the decoded digital representation of the DTMF signal for further processing or control.

How Many Pins does MC145028P have and What are the Functions of the Pinout Configuration?

The MC145028P is housed in a 16-pin PDIP (Plastic Dual In-line Package) package. The pinout configuration includes:

  • VCC: Positive power supply pin.
  • VREF: Reference voltage pin.
  • VSS: Ground pin.
  • IN+: Non-inverting input pin for the internal amplifier.
  • IN-: Inverting input pin for the internal amplifier.
  • OUT1, OUT2: Digital output pins for the decoded DTMF signals.
  • ST, Q1, Q2, Q3: Status and control pins.

What are the Pros and Cons of MC145028P?

Pros:

  • DTMF Decoding: Specifically designed for reliable DTMF signal decoding in various applications.
  • Simple Interface: Offers straightforward input and output interfaces for easy integration.
  • Reliability: Provides consistent decoding performance for telecommunication and control systems.
  • Widely Used: Widely adopted and supported in the industry for DTMF decoding applications.

Cons:

  • Single Function: Limited to DTMF decoding functionality, may not be suitable for general-purpose analog signal processing.
  • Obsolete: The MC145028P may be considered obsolete by some suppliers, leading to potential availability issues.

Are There Any Equivalents/Alternatives to MC145028P for Recommendation?

  • The MT8870 DTMF Decoder from Microsemi is a popular alternative for DTMF decoding applications.
  • Alternatives to the MC145028P include the KT3170 DTMF Receiver from ETC and the TCM5087 DTMF Receiver from Texas Instruments.

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