Features: · 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 RFIApplication· Energy management systems· Home convenience control· Inter-office communication· Appliance...
LM1893: Features: · 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 RFIApp...
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If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/Distributors for availability and specifications.
Supply voltage 30 V
Voltage on pin 12 55 V
Voltage on pin 10 (Note 1) 41 V
Voltage on pins 5 and 17 40 V
5.6 V DC zener current 100 mA
Junction temperature: transmit mode 150
receive mode 125
Electro-Static Discharge (120 pF, 1500) 1KV
Maximum continuous dissipation, TA=25,
plastic DIP N (Note 2): transmit mode 1.66 W
receive mode 1.33 W
Operating ambient temp. range -40 to 85
Storage temperature range -65 to 150
Lead temp., soldering, 7 seconds 260
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.
Carrier-current systems LM1893 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.