CAD Models

 There is no relevant information available for this part yet.

Lifecycle Status Indicator

MC145484DW  Lifecycle Status Indicator

Product Attributes

Overview

The MC145484 is a general purpose per channel PCM Codec–Filter with pin selectable Mu–Law or A–Law companding, and is offered in 20–pin SOG, SSOP, and TSSOP packages. This device performs the voice digitization and reconstruction as well as the band limiting and smoothing required for PCM systems. This device is designed to operate in both synchronous and

asynchronous applications and contains an on–chip precision reference voltage.

This device has an input operational amplifier whose output is the input to the encoder section. The encoder section immediately low–pass filters the analog signal with an active R–C filter to eliminate very high frequency noise from being modulated down to the passband by the switched capacitor filter. From the active R–C filter, the analog signal is converted to a differential signal. From this point, all analog signal processing is done differentially. This allows processing of an analog signal that is twice the amplitude allowed by a single–ended design, which reduces the significance of noise to both the inverted and non–inverted signal paths. Another advantage of this differential design is that noise injected via the power supplies is a common–mode signal that is cancelled when the inverted and non–inverted signals are recombined. This dramatically improves the power supply rejection ratio. After the differential converter, a differential switched capacitor filter band–passes the analog signal from 200 Hz to 3400 Hz before the signal is digitized by the differential compressing A/D converter.

Features

The MC145484 PCM Codec–Filter has a high impedance VAG reference pin which allows for decoupling of the internal circuitry that generates the mid–supply VAG reference voltage, to the VSS power supply ground. This reduces clock noise on the analog circuitry when external analog signals are referenced to the power supply ground. This device is optimal for electronic SLIC interfaces.

The MC145484 PCM Codec–Filter accepts a variety of clock formats, including Short Frame Sync, Long Frame Sync, IDL, and GCI timing environments. This device also maintains compatibility with Motorola’s family of Telecommunication products, including the MC14LC5472 and MC145572 U–Interface Transceivers, MC145474/75 and MC145574 S/T–Interface Transceivers, MC145532 ADPCM Transcoder, MC145422/26 UDLT–1, MC145421/25 UDLT–2, and MC3419/MC33120 SLICs. The MC145484 PCM Codec–Filter utilizes CMOS due to its reliable low–power performance and proven capability for complex analog/digital VLSI functions.

• Single 5 V Power Supply

• Typical Power Dissipation of 15 mW, Power–Down of 0.01 mW

• Fully–Differential Analog Circuit Design for Lowest Noise

• Transmit Band–Pass and Receive Low–Pass Filters On–Chip

• Active R–C Pre–Filtering and Post–Filtering

• Mu–Law and A–Law Companding by Pin Selection

• On–Chip Precision Reference Voltage of 1.575 V for a – 0 dBm TLP @ 600 Ω

• Push–Pull 300 Ω Power Drivers with External Gain Adjust

• MC14LC5480EVK is the Evaluation Kit for This Device

Advantages and Disadvantages

There is no relevant information available for this part yet.

Applications

 There is no relevant information available for this part yet.

Compliance

ECCN / UNSPSC

Documents & Media

There is no relevant information available for this part yet.

Product Manufacturer

NXP Semiconductors N.V. is a Dutch global Semiconductor manufacturer headquartered in Eindhoven, Netherlands. The company employs approximately 31,000 prople in more than 35 countries, including 11,200 engineers in 33 counties. NXP Semiconductors N.V. enables secure connections and infrastructure for a smarter world, advancing solutions that make lives easier, better, and safer. As the world leader in secure connectivity solutions for embedded applications, NXP is driving innovation in the secure connected vehicle, end-to-end security, and privacy and smart connected solutions markets.

Product Range

Distributors

Alternative Models

There is no relevant information available for this part yet.

Popularity by Region

MC145484DW   Popularity by Region

Market Price Analysis

There is no relevant information available for this part yet.

Pictures

MC145484DW  Image