| 1639401 | U8A6CD | Ultar Fast Recovery Rectifier Diode | Korea Electronics (KEC) |
| 1639402 | U8A6CI | Ultar Fast Recovery Rectifier Diode | Korea Electronics (KEC) |
| 1639403 | U8KBA80R | General Purpose Rectifiers / SIP Bridges | Shindengen |
| 1639404 | U9014 | Advanced Power MOSFET | Fairchild Semiconductor |
| 1639405 | U9120 | Advanced Power MOSFET | Fairchild Semiconductor |
| 1639406 | U9224 | Advanced Power MOSFET | Fairchild Semiconductor |
| 1639407 | U9280M-H | 4-bit microcontroller plus transponder front end for combination of remote control and immobilizer function. | Atmel |
| 1639408 | U9310 | Advanced Power MOSFET | Fairchild Semiconductor |
| 1639409 | U99A | 99 Pin Ceramic Pin Grid Array | National Semiconductor |
| 1639410 | U9T7741393 | Operational Amplifier 8-PDIP 0 to 70 | Texas Instruments |
| 1639411 | UA1 | 0.35 um ULC Series. Up to 1,000,000 gates | Atmel |
| 1639412 | UA1E | 0.35 um ULC Series with Embedded DPRAM. From 46K gates up to 780K gates supported and from 18 Kbit to 390 Kbit DPRAM. | Atmel |
| 1639413 | UA2 | Super-compact size, Slim-package, Surface mounting type | NEC |
| 1639414 | UA2-3NJ | Super-compact size, Slim-package, Surface mounting type | NEC |
| 1639415 | UA2-3NJ-L | Super-compact size, Slim-package, Surface mounting type | NEC |
| 1639416 | UA2-3NJ-R | Super-compact size, Slim-package, Surface mounting type | NEC |
| 1639417 | UA2-3NU | Super-compact size, Slim-package, Surface mounting type | NEC |
| 1639418 | UA2-3NU-L | Super-compact size, Slim-package, Surface mounting type | NEC |
| 1639419 | UA2-3NU-R | Super-compact size, Slim-package, Surface mounting type | NEC |
|
| 1639420 | UA2-3NUN | Super-compact size, Slim-package, Surface mounting type | NEC |
| 1639421 | UA2-3NUN-L | Super-compact size, Slim-package, Surface mounting type | NEC |
| 1639422 | UA2-3NUN-R | Super-compact size, Slim-package, Surface mounting type | NEC |
| 1639423 | UA2-3SNJ | Super-compact size, Slim-package, Surface mounting type | NEC |
| 1639424 | UA2-3SNJ-L | Super-compact size, Slim-package, Surface mounting type | NEC |
| 1639425 | UA2-3SNJ-R | Super-compact size, Slim-package, Surface mounting type | NEC |
| 1639426 | UA2-3SNU | Super-compact size, Slim-package, Surface mounting type | NEC |
| 1639427 | UA2-3SNU-L | Super-compact size, Slim-package, Surface mounting type | NEC |
| 1639428 | UA2-3SNU-R | Super-compact size, Slim-package, Surface mounting type | NEC |
| 1639429 | UA2-3SNUN | Super-compact size, Slim-package, Surface mounting type | NEC |
| 1639430 | UA2-3SNUN-L | Super-compact size, Slim-package, Surface mounting type | NEC |
| 1639431 | UA2-3SNUN-R | Super-compact size, Slim-package, Surface mounting type | NEC |
| 1639432 | UA2B200AX | Contact Type Image Sensor | Mitsubishi Electric Corporation |
| 1639433 | UA3730 | SECURITY LOCK WITH ALARM | UMC |
| 1639434 | UA3730 | Security Lock with Alarm | United Microelectronics |
| 1639435 | UA4151 | VOLTAGE-TO-FREQUENCY CONVERTER | Fairchild Semiconductor |
| 1639436 | UA4151HC | VOLTAGE-TO-FREQUENCY CONVERTER | Fairchild Semiconductor |
| 1639437 | UA4151PC | VOLTAGE-TO-FREQUENCY CONVERTER | Fairchild Semiconductor |
| 1639438 | UA4151TC | VOLTAGE-TO-FREQUENCY CONVERTER | Fairchild Semiconductor |
| 1639439 | UA592 | Differential Video Amplifier | National Semiconductor |
| 1639440 | UA702DMQB | Wideband DC Amplifier | Fairchild Semiconductor |
