LM1893-LM2893 Carrier-Current Transceiver is a chip that uses power mains to transfer information. It enables half-duplex communication of serial bit streams and features noise resistance, high data transmission rate, and easily boosted output power.
The LM1893 and LM2893 are bipolar carrier‑current transceiver chips that enable bi‑directional data communication over power‑line networks. The document describes the device architecture, typical applications such as home‑automation, inter‑office communication, fire‑alarm and security systems, and provides design guidelines.
Key sections include a general description, absolute maximum ratings, electrical characteristics for both transmitter and receiver, typical performance curves, and detailed application information with recommended component values.
| Supply voltage (max) | 30 V |
|---|---|
| Operating ambient temperature range | -40 °C to 85 °C |
| Maximum data transmission rate | 4.8 kBaud |
| Carrier frequency range | 50 kHz to 300 kHz |
| Zener voltage | 5.6 V |
| Transmit‑mode junction temperature limit | 150 °C |
The device can be operated with a supply voltage up to 30 V.
It operates from –40 °C to 85 °C ambient temperature.
It supports data transmission rates up to 4.8 kBaud.
The transceiver works with carrier frequencies from 50 kHz to 300 kHz.