ADPCM Transcoder

Conforms to G.721–1988 and T1.301–1987



The MC145532 Adaptive Differential Pulse Code Modulation (ADPCM) Transcoder provides a low–cost, full–duplex, single–channel transcoder to (from) a 64 kbps PCM channel from (to) either a 16 kbps, 24 kbps, 32 kbps, or 64 kbps channel.



• Complies with CCITT Recommendation G.721–1988

• Complies with the American National Standard (T1.301–1987)

• Full–Duplex, Single–Channel Operation

• Mu–Law or A–Law Coding is Pin Selectable

• Synchronous or Asynchronous Operation

• Easily Interfaces with Any Member of Motorola’s PCM Codec–Filter Mono–Circuit Family or Other Industry Standard Codec

• Serial PCM and ADPCM Data Transfer Rate from 64 kbps to 5.12 Mbps

• Power–Down Capability for Low Current Consumption

• The Reset State, an Option Specified in the Standards, is Automatically Initiated When the RESET Pin is Released

• Simple Time Slot Assignment Timing for Transcoder Applications

• Single 5 V Power Supply

• 16–Pin Package

• The MC145536EVK is the Evaluation Platform for the MC145532 and Also Includes the MC145480 5 V PCM Codec–Filter