16-bit MSP430 MCU at 8 MHz — what it is and where it fits
The MSP430F168IRTDR: 16-bit microcontroller with MSP430 CPU16 core, clocked at 8 MHz. It carries 48 KB of Flash program memory and 2K x 8 of RAM.
8 MHz core — what the clock speed means for the design
The 8 MHz clock is the maximum CPU frequency for this part. For a 16-bit MSP430 core, that translates to roughly 8 MIPS. This is sufficient for slow-loop sensor acquisition, periodic ADC reads, and serial communication at standard baud rates, but it will not sustain heavy DSP or real-time control loops above a few kilohertz. The speed rating sets the timing budget for bus transactions and peripheral clocking — the internal oscillator eliminates the need for an external crystal in many designs, though an external clock can be used if tighter timing accuracy is needed.
48 KB Flash — firmware capacity and field updates
With 48 KB of Flash (48K x 8 plus 256 bytes), this MCU holds a moderate-sized firmware image. The Flash is in-system programmable, so field updates are possible if the bootloader supports it. The 2K x 8 RAM is tight for data buffering — expect to manage stack and global variables carefully, especially when using the ADC or DMA.
Obsolete — sourcing reality and the replacement path
Texas Instruments has marked the MSP430F168IRTDR as obsolete. The manufacturer no longer produces the part, and no last-time-buy window is currently open.
Industrial temperature range and package
Rated for -40°C to 85°C ambient, this MCU suits industrial equipment, outdoor telecom enclosures, and automotive cabin-adjacent modules (non-AEC). The 64-VFQFN package with exposed pad (9x9 mm) requires a thermal land on the PCB for heat dissipation; the pad is typically connected to ground. Surface-mount assembly is standard, and the package pitch is fine enough to require careful soldering profiles.