The NXP MC9S08LC36LK is an 8-bit microcontroller from the S08 family built around a 40 MHz S08 core. On-chip peripherals include an 8-channel 12-bit ADC, PWM, watchdog timer, LVD, POR, and serial interfaces (I2C, SCI, SPI).
The 40 MHz clock rate is typical for an 8-bit MCU in this class — enough for real-time key scanning, display refresh, and sensor polling without a dedicated display controller. The external oscillator input lets you use a crystal or ceramic resonator for accurate timing; the PLL can multiply it up to the 40 MHz ceiling. If your loop needs to update a 100-segment LCD at 60 Hz while running a PID or UART communication, this core has the headroom.
Integrated LCD driver — BOM savings
The on-chip LCD peripheral drives segmented glass LCDs directly, eliminating an external driver IC and its associated routing. This is the feature that differentiates the LC36 from other S08 parts — it targets metering, appliance displays, and handheld instruments where a few dozen segments are enough. The 24 GPIO pins remain available for keypad, backlight, or sensor inputs.
Memory budget and ADC resolution
36 KB Flash and 2.5 KB RAM are modest by today's standards — plan for compact firmware, lookup tables, and a small stack. The 12-bit ADC with 8 channels provides enough resolution for battery monitoring, temperature sensing, or analog front-end inputs. If your application needs more than 2.5 KB of RAM for buffering or a GUI frame buffer, consider stepping up to a larger S08 variant.
The 80-LQFP (12x12 mm) is a fine-pitch SMD package. The supplier device package is 80-FQFP (12x12) — same footprint, different supplier designation.