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HC9P55564-5 Datasheet Continuously Variable Slope Delta-modulator (cvsd)

Manufacturer: Intersil (now Renesas)

Overview: Low Bit Rate Voiceband Encoders/Decoder Semiconductor February 1999 T UCT ROD ACEMEN 47 P E 7 T L OLE REP 00-442-7 OBS ENDED 8 M ns 1 .

General Description

The HC-55564 is a half duplex modulator/demodulator CMOS intergrated circuit used to convert voice signals into serial NRZ digital data and to reconvert that data into voice.

The conversion is by delta-modulation, using the Continuously Variable Slope (CVSD) method of modulation/demodulation.

While the signals are patible with other CVSD circuits, the internal design is unique.

Key Features

  • All Digital.
  • Requires Few External Parts.
  • Low Power Drain: 1.5mW Typical From Single 4.5V To 6V Supply.
  • Time Constants Determined by Clock Frequency; No Calibration or Drift Problems: Automatic Offset Adjustment.
  • Half Duplex Operation Under Digital Control.
  • Filter Reset Under Digital Control.
  • Automatic Overload Recovery.
  • Automatic “Quiet” Pattern Generation.
  • AGC Control Signal Available.

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HC9P55564-5 Distributor