| 1650481 | UM82C852 | Multi I/O For XT | UMC |
| 1650482 | UM82C94 | CMOS CLOCK GENERATOR & DRIVER | Unknow |
| 1650483 | UM8326 | Floppy Disk Data Separator | UMC |
| 1650484 | UM8388 | Single-Chip Floppy Disk Controller | UMC |
| 1650485 | UM8397 | Floppy Disk Controller | UMC |
| 1650486 | UM8398 | Floppy Disk Controller | UMC |
| 1650487 | UM83C001 | Hard Disk Controller | UMC |
| 1650488 | UM83C002 | RAM Buffer Controller | UMC |
| 1650489 | UM83C004 | Hard Disk Controller Interface | UMC |
| 1650490 | UM83C021 | Hard Disk Controller | UMC |
| 1650491 | UM83C022 | AT HDC Interface | UMC |
| 1650492 | UM91210 | TONE/PULSE DIALER | UMC |
| 1650493 | UM91210/30 | Tone/Pulse Dialer | UMC |
| 1650494 | UM91210C | TONE/PULSE DIALER | UMC |
| 1650495 | UM91210CM | TONE/PULSE DIALER | UMC |
| 1650496 | UM91210D | TONE/PULSE DIALER | UMC |
| 1650497 | UM91210DM | TONE/PULSE DIALER | UMC |
| 1650498 | UM91214 | Tone/Pulse Dialer | UMC |
| 1650499 | UM91214 | Tone/Pulse Dialer | UMC |
|
| 1650500 | UM91214A | Tone / Pulse Dialer | UMC |
| 1650501 | UM91214A | Dial rate: 10/20pps; V(dd): 6.0V; 50mA; 500mW; tone/pulse dialer | United Microelectronics |
| 1650502 | UM91214B | Tone / Pulse Dialer | UMC |
| 1650503 | UM91214B | Dial rate: 10/20pps; V(dd): 6.0V; 50mA; 500mW; tone/pulse dialer | United Microelectronics |
| 1650504 | UM91214C | Tone / Pulse Dialer | UMC |
| 1650505 | UM91214C | Dial rate: 10/20pps; V(dd): 6.0V; 50mA; 500mW; tone/pulse dialer | United Microelectronics |
| 1650506 | UM91214D | Tone / Pulse Dialer | UMC |
| 1650507 | UM91214D | Dial rate: 10/20pps; V(dd): 6.0V; 50mA; 500mW; tone/pulse dialer | United Microelectronics |
| 1650508 | UM91215 | Tone/Pulse Dialer | UMC |
| 1650509 | UM91215 | Tone/Pulse Dialer | UMC |
| 1650510 | UM91215A | Tone / Pulse Dialer | UMC |
| 1650511 | UM91215A | Dial rate: 10/20pps; V(dd): 6.0V; 50mA; 500mW; tone/pulse dialer | United Microelectronics |
| 1650512 | UM91215B | Tone / Pulse Dialer | Unicorn Microelectronics |
| 1650513 | UM91215B | Dial rate: 10/20pps; V(dd): 6.0V; 50mA; 500mW; tone/pulse dialer | United Microelectronics |
| 1650514 | UM91215C | Tone / Pulse Dialer | UMC |
| 1650515 | UM91215C | Dial rate: 10/20pps; V(dd): 6.0V; 50mA; 500mW; tone/pulse dialer | United Microelectronics |
| 1650516 | UM91215D | Tone / Pulse Dialer | UMC |
| 1650517 | UM91215D | Dial rate: 10/20pps; V(dd): 6.0V; 50mA; 500mW; tone/pulse dialer | United Microelectronics |
| 1650518 | UM91230 | Tone/Pulse Dialer | UMC |
| 1650519 | UM91230C | TONE/PULSE DIALER | UMC |
| 1650520 | UM91230CM | TONE/PULSE DIALER | UMC |
