NXP S08 8-bit MCU, MC9S08SH4CFK, 40 MHz core, 4 KB Flash, 256 B RAM, 17 I/O, 12x10-bit ADC, I²C/LIN/SCI/SPI, -40°C to 85°C, 24-QFN-EP 4x4 mm.
| Parameter | Value |
|---|---|
| Series | S08 |
| Mounting | Surface Mount |
| Oscillator type | Internal |
| Program memory type | FLASH |
| Voltage - supply (Vcc (Vdd)) | 2.7V ~ 5.5V |
| Operating temperature | -40°C ~ 85°C (TA) |
| Speed | 40MHz |
| Package | Bulk |
| RAM size | 256 x 8 |
| Core size | 8-Bit |
| Peripherals | LVD, POR, PWM, WDT |
| Connectivity | I²C, LINbus, SCI, SPI |
| Number of i (O) | 17 |
| Core processor | S08 |
| Case | 24-VFQFN Exposed Pad |
| Data converters | A/D 12x10b |
| Program memory size | 4KB (4K x 8) |
The NXP MC9S08SH4CFK is an 8-bit S08 core MCU clocked at 40 MHz, with 4 KB of Flash and 256 bytes of RAM — a memory budget that fits simple control loops, state machines, and serial protocol handling without the overhead of a 32-bit Cortex-M.
No — the MK51DX128CMC7 is a 72 MHz Cortex-M4 in a different package and pinout; the MC9S08SH4CFK is an 8-bit S08 core and would require a board redesign to swap.