| 1638401 | U2400B | Charging of Batteries with Automatic Pre-Discharge | TEMIC |
| 1638402 | U2400B | Charging of Batteries with Automatic Pre-Discharge | Vishay |
| 1638403 | U2402B | Fast Charge Controller for NiCd/NiMH Batteries | TEMIC |
| 1638404 | U2402B-B | Fast Charge Controller for NiCd/NiMH Batteries | TEMIC |
| 1638405 | U2402B-C | Fast Charge Controller for NiCd/NiMH Batteries | TEMIC |
| 1638406 | U2403B | Current source and smart timer for slow charge | Atmel |
| 1638407 | U2403B | Charge Timer | TEMIC |
| 1638408 | U2405B | Fast Charge Controller for Drained NiCd/NiMH Batteries | TEMIC |
| 1638409 | U2407B | Simple Controller for Fast Charge Systems | TEMIC |
| 1638410 | U243B | Warning or Car-Direction Indicator | TEMIC |
| 1638411 | U243B-FP | Warning or Car-Direction Indicator | TEMIC |
| 1638412 | U247BG | To drive LED-displays with 5 or 10 diodes | Vishay |
| 1638413 | U2480B | Automotive Lamp Outage Monitor | TEMIC |
| 1638414 | U2481B | Automotive Lamp Outage Monitor | TEMIC |
| 1638415 | U2482B | Automotive Lamp Outage Monitor | TEMIC |
| 1638416 | U2510B | All-band AM/FM receiver and audio amplifier | Atmel |
| 1638417 | U2510B | All-Band AM/FM Receiver and Audio Amplifier | TEMIC |
| 1638418 | U2510B-M | All-Band AM/FM Receiver and Audio Amplifier | Atmel |
| 1638419 | U2510B-MT | All-Band AM/FM Receiver and Audio Amplifier | Atmel |
|
| 1638420 | U2514B | One-Chip AM/FM Receiver IC for Digital Tuning | TEMIC |
| 1638421 | U2514B-AFN | AM/FM Receiver for Digital Tuning with FM-Stereo Decoder | TEMIC |
| 1638422 | U2514B-AFNG3 | AM/FM Receiver for Digital Tuning with FM-Stereo Decoder | TEMIC |
| 1638423 | U2532B | IR Transmitter and Receiver | TEMIC |
| 1638424 | U2535B | Preamplifier for IR Remote Control | TEMIC |
| 1638425 | U2535B-FP | Preamplifier for IR Remote Control | TEMIC |
| 1638426 | U2537B | IR Preamplifier | TEMIC |
| 1638427 | U2538B | IR preamplifier | Atmel |
| 1638428 | U2538B | IR Receiver for Data Communication | TEMIC |
| 1638429 | U2538B-MFP | IR RECEIVER FOR DATA COMMUNICATION | Atmel |
| 1638430 | U2538B-MFPG3 | IR RECEIVER FOR DATA COMMUNICATION | Atmel |
| 1638431 | U257 | DUAL N-CHANNEL JFET HIGH FREQUENCY AMPLIFIER | Intersil |
| 1638432 | U257 | Trans JFET N-CH 7-Pin TO-78 | New Jersey Semiconductor |
| 1638433 | U257A | 257 Pin Ceramic Pin Grid Array, Cavity Up | National Semiconductor |
| 1638434 | U257BG | To drive LED-displays with 5 or 10 diodes | Vishay |
| 1638435 | U259A | 259 Pin Ceramic Pin Grid Array | National Semiconductor |
| 1638436 | U2616D | Static (2k x 8) bit PROM, manufacturer programmed, possibly equivalent I2616 | RFT |
| 1638437 | U263B1 | (U263B2) Zero Voltage Switch | Vishay |
| 1638438 | U2640B | Intermittent- and Wipe/Wash Control for Wiper Systems | TEMIC |
| 1638439 | U2642B | Intermittent- and Wipe/Wash Control for Wiper Systems | TEMIC |
| 1638440 | U267BG | Monolithic Integrated Circuits | Vishay |
