The Infineon SAF-XC164N-8F40FBB is a 16-bit microcontroller built around the C166SV2 core, running at 40 MHz and carrying 64 KB of on-chip Flash program memory. It belongs to the XC16x family, a line widely used in industrial control, motor drives, and automotive body electronics where deterministic real-time response matters more than raw MIPS.
40 MHz core clock and 2.35 V supply — timing and power rail decisions
The 40 MHz fuse speed sets the instruction cycle time for the C166SV2 pipeline. The internal oscillator means no external crystal is needed for basic operation, but the EBI/EMI timing still depends on the external memory's access time. For a BOM engineer, the 2.35 V rail means a dedicated LDO or a multi-rail PMIC; sharing a rail without a regulator will exceed the absolute maximum.
Industrial temperature range and peripheral set
The on-chip peripherals — PWM for motor control, WDT for watchdog supervision, plus SPI and UART/USART serial interfaces — cover the common control-loop and sensor-communication needs without external ICs. The 100-pin TQFP package is a hand-solderable footprint, which helps during prototype rework and low-volume production.
That means no last-time-buy deadline, no end-of-life notice currently in force, and continued factory support for new designs.