| 1638361 | U2164C20/1 | ditto (seizure type) | RFT |
| 1638362 | U2164C25 | Ditto (seizure type) | RFT |
| 1638363 | U217 | Zero-Voltage Switch with Adjustable Ramp | TEMIC |
| 1638364 | U217B | Zero Voltage Switch with Adjustable Ramp | TEMIC |
| 1638365 | U217B-B | Zero-Voltage Switch with Adjustable Ramp | TEMIC |
| 1638366 | U217B-BFP | Zero-Voltage Switch with Adjustable Ramp | TEMIC |
| 1638367 | U217B-BFPG3 | Zero-Voltage Switch with Adjustable Ramp | TEMIC |
| 1638368 | U217B-FP | Zero Voltage Switch with Adjustable Ramp | TEMIC |
| 1638369 | U2203B | RGB Video Amplifier System for Monitors | TEMIC |
| 1638370 | U2203B-A | RGB Video Amplifier System for Monitors | TEMIC |
| 1638371 | U223A | 223 Pin Ceramic Pin Grid Array | National Semiconductor |
| 1638372 | U224A | 224 Pin Ceramic Pin Grid Array, Cavity Up | National Semiconductor |
| 1638373 | U225D | Static (1k x 1) bit RAM, tri-state output, possibly equivalent 2125 | RFT |
| 1638374 | U2270B | Read/write base station IC | Atmel |
| 1638375 | U2270B | U2270B Antenna Design Hints | TEMIC |
| 1638376 | U2270B | Read / Write Base Station IC | TEMIC |
| 1638377 | U2270B-FP | Read / write base station IC for car immobilizers, access control animal identification and etc applications | TEMIC |
| 1638378 | U2300B | VHF/ UHF-Tuner-IC | TEMIC |
| 1638379 | U2305B | VHF/ UHF-Tuner-IC | TEMIC |
|
| 1638380 | U2309B | VHF/ UHF-Tuner-IC | TEMIC |
| 1638381 | U2309B-AFL | TV-Tuner-IC with Three Separate Oscillators and Mixers, SAW-Driver, L. O.-Output and Tri-State Band Switch | TEMIC |
| 1638382 | U2309B-AFS | TV-Tuner-IC with Three Separate Oscillators and Mixers, SAW Driver, L.O.-Output and Tri-State-Band Switch | TEMIC |
| 1638383 | U231 | Dual N-Channel JFET General Purpose Amplifier | Intersil |
| 1638384 | U232 | Dual N-Channel JFET General Purpose Amplifier | Intersil |
| 1638385 | U2320B | VHF/UHF Tuner-IC | TEMIC |
| 1638386 | U2320B-FLG3 | VHF/UHF Tuner-IC | TEMIC |
| 1638387 | U2321BAF | TV-Tuner IC with Two Separate Oscillators and Mixers, | TEMIC |
| 1638388 | U2326B | VHF/ UHF-Tuner-IC | TEMIC |
| 1638389 | U2329B-AFL | TV-Tuner-IC with Two Separate Oscillators and Mixers, SAW Driver and Dual-State-Band Switch | TEMIC |
| 1638390 | U233 | Dual N-Channel JFET General Purpose Amplifier | Intersil |
| 1638391 | U234 | Dual N-Channel JFET General Purpose Amplifier | Intersil |
| 1638392 | U235 | Dual N-Channel JFET General Purpose Amplifier | Intersil |
| 1638393 | U2350B | PWM Speed Control for Permanent Excited DC Motors | TEMIC |
| 1638394 | U2350B-FP | PWM Speed Control for Permanent Excited DC Motors | TEMIC |
| 1638395 | U2352 | PWM Power Control for DC Loads | TEMIC |
| 1638396 | U2352B | PWM Power Control for DC Loads | TEMIC |
| 1638397 | U2364D | Static (8k x 8) bit ROM, mask programmed, possibly equivalent I2364 | RFT |
| 1638398 | U2365D | Static (8k x 8) bit ROM, mask programmed | RFT |
| 1638399 | U237BG | To drive LED-displays with 5 or 10 diodes | Vishay |
| 1638400 | U2391B | Quartz Controlled Pulse Generator | TEMIC |
