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MC145532 Datasheet Adpcm Transcoder

Manufacturer: Motorola Semiconductor (now NXP Semiconductors)

Overview: MOTOROLA SEMICONDUCTOR TECHNICAL DATA Order this document by MC145532/D ADPCM Transcoder MC145532 16 1 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. • • • • • • • • • • • • • plies with CCITT Remendation G.721–1988 plies 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 DW SUFFIX SOG PACKAGE CASE 751G 16 1 L SUFFIX CERAMIC PACKAGE CASE 620 ORDERING INFORMATION MC145532DW SOG Package MC145532L Ceramic Package PIN ASSIGNMENT MODE DDO DOE DDC DDI DIE RESET VSS 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 VDD EDO EOE EDC EDI EIE SPC APD BLOCK DIAGRAM DDO DOE S REG DDC DDI DIGITAL SIGNAL PROCESSOR REG LATCH S REG EDC EDI I/O DATA BUS EDO EDE S REG DIE LATCH REG S REG EIE MODE APD VSS RESET SPC VDD REV 1 9/95 (Replaces NP470) © Motorola, Inc.

General Description

An Adaptive Differential PCM (ADPCM) transcoder is used to reduce the data rate required to transmit a PCM encoded voice signal while maintaining the voice fidelity and intelligibility of the PCM signal.

The transcoder is used on 64 kbps data streams which represent either voice

Key Features

  • independent of the mode of any previous enables. A transition from short frame to long frame mode or vice versa will cause at least one frame of data to be destroyed. Each of the four sets of I/O pins determines its mode independent of the other sets. Thus the encoder input could be.

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MC145532 Distributor