MC145502中文资料PCM Codec-Filter数据手册恩XP规格书

描述 Description

Overview The MC145502 has been discontinued. Suggested replacement: none.The MC145500, MC145501, MC145502, MC145503, and MC145505 are all per channel PCM Codec–Filter mono–circuits. These devices perform the voice digitization and reconstruction as well as the band limiting and smoothing required for PCM systems. The MC145502 is the full–featured device which presents all of the options of the chip. This device is packaged in a 22–pin DIP and a 28–pin chip carrier package and contains all the features of the MC145500 and MC145501 plus several more. Most of these features can be made available in a lower pin count package tailored to a specific user’s application. Contact the factory for further details. These devices are pin–for–pin replacements for Motorola’s first generation of MC14400/01/02/03/05 PCM mono–circuits and are upwardly compatible with the MC14404/06/07 codecs and other industry standard codecs. They also maintain compatibility with Motorola’s family of MC33120 and MC3419 SLIC products. The MC145500 family of PCM Codec–Filter mono–circuits utilizes CMOS due to its reliable low–power performance and proven capability for complex analog/digital VLSI functions.  

特性 Features

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• 16–Pin Package
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• Transmit Bandpass and Receive Low–Pass Filter On–Chip
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• Pin Selectable Mu–Law/A–Law Companding with Corresponding Data Format
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• On–Chip Precision Reference Voltage (3.15 V)
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• Power Dissipation of 50 mW, Power–Down of 0.1 mW at ± 5 V
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• Automatic Prescaler Accepts 128 kHz, 1.536, 1.544, 2.048, and 2.56 MHz
for Internal Sequencing
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• 18–Pin Package
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• Selectable Peak Overload Voltages (2.5, 3.15, 3.78 V)
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• Access to the Inverting Input of the TxI Input Operational Amplifier
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• 22–Pin and 28–Pin Packages
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• Variable Data Clock Rates (64 kHz to 4.1 MHz)
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• Complete Access to the Three Terminal Transmit Input Operational
Amplifiers
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• An External Precision Reference May Be Used