National LM1893 LM2893 Data Sheet
Summary
The LM1893/LM2893 is a bipolar carrier-current transceiver (PLC) that enables high-speed data transfer over existing AC power mains. This chip acts as a reliable power line interface for bi-directional communication of digital bit streams, supporting various coding schemes. It features robust FSK modulation and noise filtering for maximum range and resistance to impulse noise. Ideal for advanced systems like home automation controllers (COPS), telemetry devices, security, and inter-office communication requiring low RFI transmissions. The manual provides comprehensive technical specifications, operational guidelines, and application details.
Manual Details
| Brand | National |
|---|---|
| Pages | 24 |
| File Size | 752.47 KB |
| Published | June 16, 2026 |
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Frequently Asked Questions
What is the maximum data transmission rate?
The transceiver supports up to a 4.8 kBaud data transmission rate.
Can this device communicate using standard power lines?
Yes, it uses the power mains to transfer information between remote locations via carrier-current systems (Power Line Carrier or PLC transceivers).
How is the signal modulated and driven for transmission?
The transmission uses a sinusoidal carrier that is FSK modulated and impressed on any power line through a rugged on-chip driver.
What are the operational temperature ranges?
The device operates in an ambient temperature range of 40 to 85°C, but can store up to 150°C.