| Manufacturer | Part # | Datasheet | Description |
 National Semiconductor ... | LM1837 |  415Kb/12P | Low Noise PREAMPLIFIER FOR AUTOREVERSING TAPE PLAYBACK SYSTEMS |
| LM1837M |  415Kb/12P | Low Noise PREAMPLIFIER FOR AUTOREVERSING TAPE PLAYBACK SYSTEMS |
| LM1837N |  415Kb/12P | Low Noise PREAMPLIFIER FOR AUTOREVERSING TAPE PLAYBACK SYSTEMS |
 National Semiconductor ... | LM1830 |  150Kb/ 8P | Fluid Detector |
| LM1830N |  150Kb/ 8P | Fluid Detector |
| LM1837M |  415Kb/ 12P | Low Noise PREAMPLIFIER FOR AUTOREVERSING TAPE PLAYBACK SYSTEMS |
| LM1837N |  415Kb/ 12P | Low Noise PREAMPLIFIER FOR AUTOREVERSING TAPE PLAYBACK SYSTEMS |
 National Semiconductor ... | LM1800 |  108Kb/ 4P | LM1800 Phase-Locked Loop FM Stereo Demodulator |
| LM1800N |  108Kb/ 4P | LM1800 Phase-Locked Loop FM Stereo Demodulator |
| LM1801 |  235Kb/ 8P | BATTERY OPERATED POWER COMPARATOR |
| LM1801N |  235Kb/ 8P | BATTERY OPERATED POWER COMPARATOR |
 National Semiconductor ... | LM1812 |  496Kb/ 8P | ULTRASONIC TRANSCEIVER |
| LM1812 |  179Kb/ 10P | Ultrasonic Transceiver April 1989 |