- TOP256EN, SIP(6)7
- Transformer TD3048 Tradania
- TSA5511, DIP18
- U2829B, DIP-16
- U336M, DIP-28
- U665B, DIP-8
- UA741CP, DIP-8
- UAA180, DIP-18
- UBC81 PH
- UBL1 Tungsram
- UC3842, DIP-8
- UC92 Philips
- UCC85 Telefunken
- UCF80 Luxor / Tungsram
- UCH42 Luxor / Miniwatt
- UCH81 Philips
- UCH81 Telefunken
- UCL11 Philips
- UCL11 Valvo
- UF11 Philips
- UF85 Miniwatt / Philips
- UL41 Mullard
- UL41 Philips Bulk
- UL41 Telefunken
- UL41 Tungsram
- UL41 Valvo
- UL84 Industria
- UL84 Mullard
- UM80 Philips
- UM80 Valvo
- uPC1025H, SIL-10
- uPC1156H, SIP-10
- UPC1183H, SIP-10
- UPC4558C-P, DIP-8
- uPD8255AC-2, DIP-40
- UY1N Miniwatt / Philips
- UY82 Philips
- UY89 Philips
- XF7569, TO-64
- XR-2567CP, DIP-16
- XR-558CP, DIP-16
- ZD5V1, 500mW
- ZM1000, Nixie Rør