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LM1893 Datasheet LM1893/LM2893 Carrier-Current Transceiver

Manufacturer: National Semiconductor (now Texas Instruments)

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General Description

Carrier-current systems use the power mains to transfer information between remote locations This bipolar carriercurrent chip performs as a power line interface for half-duplex (bi-directional) communication of serial bit streams of virtually any coding In transmission a sinusoidal carrier is FSK modulated and impressed on most any power line via a rugged on-chip driver In reception a PLL-based demodulator and impulse noise filter combine to give maximum range A complete system may consist of the LM1893 a COPSTM controller and discrete components Y Y Y Y Y Output power easily boosted 10-fold 50 to 300 kHz carrier frequency choice TTL and MOS compatible digital levels Regulated voltage to power logic Drives all conventional power lines Applications Y Y Y

Overview

LM1893 LM2893 Carrier-Current Transceiver April 1995 LM1893 LM2893 Carrier-Current.

Key Features

  • Y Y Y Y Y Y Y Y Y Y Noise resistant FSK modulation User-selected impulse noise filtering Up to 4 8 kBaud data transmission rate Strings of 0’s or 1’s in data allowed Sinusoidal line drive for low RFI Energy management systems Home convenience control Inter-office communication Appliance control Fire alarm systems Security systems Telemetry Computer terminal interface Typical.

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