National Semiconductor LM1893 free download

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LM1893 LM2893 Carrier-Current Transceiver April 1995 LM1893 LM2893 Carrier-Current Transceiver 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 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 Application TL H 6750 ­ 1 FIGURE 1 Block diagram of carrier current chip with a complement of discrete components making a complete FO e 125 kHz fDATA e 360 Baud transceiver Use caution with this circuit dangerous line voltage is present BI-LINETM and COPSTM are trademarks of National Semiconductor Corp Carrier-Current Transceivers are also called Power Line Carrier (PLC) transceivers C1995 National Semiconductor Corporation TL H 6750 RRD-B30M115 Printed in U S A Absolute Maximum Ratings If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Distributors for availability and specifications Supply voltage Voltage on pin 12 Voltage on pin 10 (Note 1) Voltage on pins 5 and 17 5 6 V DC zener current Junction temperature transmit mode receive mode Electro-Static Discharge (120 pF 1500X) 30 V 55 V 41 V 40 V 100 mA 150 C 125 C 1KV Maximum continuous dissipation TA e 25 C plastic DIP N (Note 2) transmit mode 1 66 W receive mode 1 33 W b 40 to 85 C Operating ambient temp range b 65 to 150 C Storage temperature range Lead temp soldering 7 seconds 260 C Note Absolute maximum ratings indicate limits beyond which damage to the device may occur Electrical specifications are not ensured when operating the device above guaranteed limits but below absolute maximum limits but there will be no device degradation General Electrical Characteristics (Note 3) The test conditions are V a e 18V and FO e 125 kHz unless otherwise noted Parameter 1 2 3 4 5 6 7 8 9 10 11 12 13 14 5 6 V Zener voltage VZ 5 6 V Zener resistance RZ Carrier I O peak survivable transient voltage VOT Carrier I O clamp voltage VOC Carrier I O clamp resistance R10 TX RX low input voltage VIL