| 1638801 | U431 | Matched High Frequency/Low Noise | Vishay |
| 1638802 | U4311B | RF receiver | Atmel |
| 1638803 | U4311B | Low-Current Superhet Remote Control Receiver | TEMIC |
| 1638804 | U4311B-FS | RF receiver - 105°C | Atmel |
| 1638805 | U4311B-MFSG3 | Low-Current Superhet Remote Control Receiver | Atmel |
| 1638806 | U4311BFS | Low-Current Superhet Remote-Control Receiver | TEMIC |
| 1638807 | U4313B | Low-Current Superhet Remote Control Receiver | TEMIC |
| 1638808 | U4313B-A | Low-Current Superhet Remote Control Receiver | TEMIC |
| 1638809 | U4313B-AFL | Low-Current Superhet Remote Control Receiver | TEMIC |
| 1638810 | U4314B | Logarithmic AM Demodulator / RSSI | TEMIC |
| 1638811 | U4314B-AFP | Logarithmic AM Demodulator/RSSI | TEMIC |
| 1638812 | U440 | N-Channel JFET Monolithic Dual | Calogic |
| 1638813 | U440 | MONOLITHIC DUAL N-CHANNEL JFET | Linear Systems |
| 1638814 | U440 | Matched N-Channel JFET Pairs | TEMIC |
| 1638815 | U440 | Matched High Gain | Vishay |
| 1638816 | U441 | N-Channel JFET Monolithic Dual | Calogic |
| 1638817 | U441 | MONOLITHIC DUAL N-CHANNEL JFET | Linear Systems |
| 1638818 | U441 | Matched N-Channel JFET Pairs | TEMIC |
| 1638819 | U441 | Matched High Gain | Vishay |
|
| 1638820 | U441NL | Monolithic N-Channel JFET Duals | Vishay |
| 1638821 | U443 | N-Channel JFET Monolithic Dual | Calogic |
| 1638822 | U444 | N-Channel JFET Monolithic Dual | Calogic |
| 1638823 | U4454B | Quasi-Split-Sound Processing and AM-Demodulator | TEMIC |
| 1638824 | U4459B | IF Amplifier for Cable DVB Processing | TEMIC |
| 1638825 | U4460BG | Video IF Amplifier with FPLL Demodulation | TEMIC |
| 1638826 | U4460BGM | Video IF Amplifier with FPLL Demodulation | TEMIC |
| 1638827 | U4462B-B | IF 1-Chip Processor (Video IF and Mono FM Sound IF) | TEMIC |
| 1638828 | U4467B | TV Sound AM Demodulator | TEMIC |
| 1638829 | U4468B | QSS + AM demodulator | Atmel |
| 1638830 | U4468B | Quasi-Split Sound Circuit and AM Demodulator | TEMIC |
| 1638831 | U4476B | IF Amplifier / Converter for DVB (Cable) | TEMIC |
| 1638832 | U4479B | DVB-Cable IF Converter and | TEMIC |
| 1638833 | U4479B-MFLG3 | DVB-Cable IF Converter and Full Multi-Standard Video-/Sound IF Processing | TEMIC |
| 1638834 | U4488B | Quasi-Split Sound Circuit and AM Demodulator | TEMIC |
| 1638835 | U44A | 44 Pin Ceramic Pin Grid Array, Cavity Up | National Semiconductor |
| 1638836 | U4648B | Telefunken Electronic | TOKO |
| 1638837 | U4790B | Automotive Lamp-Outage Monitor, VT = 8 mV, VZ(3,5) = 22 V | TEMIC |
| 1638838 | U4791B | Automotive Lamp Outage Monitor, VT=53 mV | TEMIC |
| 1638839 | U4791B-FP | Automotive Lamp Outage Monitor, VT=53 mV | TEMIC |
| 1638840 | U4793B | 2 comparators, 44-mV threshold, glow-plug application | Atmel |
