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MC145481 - 3V PCM CODEC-FILTER

General Description

A PCM Codec

Filter is used for digitizing and reconstructing the human voice.

These devices are used primarily for the telephone network to facilitate voice switching and transmission.

Key Features

  • This pin controls the compression for the encoder and the expansion for the decoder. Mu.
  • Law companding is selected when this pin is connected to VDD and A.
  • Law companding is selected when this pin is connected to VSS. PDI Power.
  • Down Input (Pin 10) This pin puts the device into a low power dissipation mode when a logic 0 is applied. When this device is powered down, all of the clocks are gated off and all bias currents are turned off, which causes RO.
  • , PO.
  • ,.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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www.DataSheet4U.com MOTOROLA SEMICONDUCTOR TECHNICAL DATA Order this document by MC145481/D MC145481 Product Preview 3 V PCM Codec-Filter The MC145481 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 and SSOP 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.