| Part Number | ROM/RAM | Speech | DMA | I/O | 8Bits | PWM | SPI | I2C | USB | PS2 | UART | AD | DA | Package |
| Size | ROM | RAM | Pins | Timer(s) | Version | |||||||||
| YSM141 | 4K/256 | - | - | 12 | 2 | 2 | 1 | - | - | - | - | - | - | SOP8(*3)/DIP8 |
| SOP16/DIP16 | ||||||||||||||
| YSM142 | 4K/256 | - | - | 21 | 2 | 1 | - | - | - | - | - | - | - | SOP20/PDIP20 |
| SOP16/SOP24 | ||||||||||||||
| YSM145 | 4K/256 | - | - | 38 | 2 | 2 | 1 | - | - | - | - | - | 1 | LQFP48 |
| YSM146 | 4K/256 | - | - | 46 | 2 | 2 | 2 | - | - | 1 | 1 | 16ch*10bit | 1 | LQFP48 |
| YSM245 | 4K/256 | - | - | 36 | 2 | 2 | - | - | 1.1(*1) | - | - | - | - | LQFP48 |
| YSM246 | 4K/256 | - | - | 38 | 2 | - | - | - | 1.1(*1) | - | - | - | - | - |
| YSM286 | 8K/256 | - | - | 48 | 4 | 6(*1) | Y | Y | 1.1(*2) | - | Y | 24(*3) | - | - |
| YSM322 | 2K/160 | - | - | 14 | 4 | 2 | Y | - | - | - | - | Y | - | - |
| YSM341 | 4K/128 | - | - | 6 | 1 | - | - | - | - | - | - | - | - | SOP8 |
| YSM343 | 4K/256 | - | - | 16 | 4 | 2 | 1 | 1 | - | 1 | - | 8ch*10bit | - | SOP14/DIP14 |
| SOP16/SOP20 | ||||||||||||||
| YSM345 | 4K/128 | - | - | 18 | 2 | 1 | - | - | - | - | - | - | - | SOP20 |
