Active 8-bit S08 with 16 KB flash — still a current production part
The MC9S08RE16FJE: It runs the S08 core at 8 MHz, with 16 KB of on-chip flash and 1 KB of RAM — enough headroom for a small control loop, sensor hub, or SCI-communicating node that doesn't need the higher throughput of the 40 MHz S08 siblings.
Memory budget and peripheral set — what fits in 16 KB flash
The 16 KB program flash (16K x 8) and 1 KB RAM (1K x 8) suit firmware that stays under about 12 KB compiled code, leaving margin for a bootloader or calibration tables. On-chip peripherals include a low-voltage detect (LVD), power-on reset (POR), PWM timer, and watchdog timer (WDT) — these cover basic supervisory and timing functions that would otherwise require external reset ICs or watchdogs, reducing BOM count. The single SCI (UART) serial interface handles point-to-point communication with a host controller, sensor module, or debug terminal. No I²C or SPI on this part — if those buses are needed, the 40 MHz S08 peers like the MC9S08GT8AMFDE add them.
Package and board-fit — 32-LQFP 7x7 mm
The supplier device package is 32-LQFP (7x7), matching the package/case field exactly. Mounting is surface-mount only. The package is ROHS3 compliant. No exposed thermal pad — the 0.8 mm pitch leads handle the heat dissipation; no special soldering profile beyond standard lead-free reflow.
Sourcing posture — active, quoted to order
The closest pin-compatible peer is the MC9S08RE8FJE, which halves the flash to 8 KB but shares the same 32-LQFP package, pinout, and peripheral set — a drop-in replacement if the firmware fits in the smaller memory.