512 KB Flash and 66K RAM — firmware space for complex protocols
With 512 KB of Flash, this MCU can hold a full USB stack, a real-time operating system kernel, and application code for a multi-sensor instrument. The 66K x 8 of RAM (about 66 KB) is generous for a 16-bit part — enough for large data buffers or a modest frame buffer for a small display. No EEPROM is on-chip, but the Flash can be used for non-volatile storage with wear-leveling.
USB 2.0-compatible full-speed device
Obsolete — sourcing through independent distribution
Texas Instruments has marked the MSP430F5659IZQWR as obsolete. No official successor part number has been published for this exact BGA variant. For new production or a BOM line that needs this code, the part is sourced through independent distribution channels — quoted to order against an RFQ. Availability and current pricing are confirmed at quote time. If you need a drop-in replacement, check the MSP430F5xx family for a pin-compatible alternative with similar Flash and RAM; the datasheet pinout is shared across several density options in the same BGA footprint.
Package and layout considerations
The 113-ball BGA Microstar Junior (7x7 mm) is a fine-pitch BGA — not something you can hand-solder with a standard iron. It requires a reflow oven, a solder stencil, and a PCB with microvias or at least via-in-pad capability. The 74 I/O lines give plenty of GPIO for parallel LCDs, keypads, or memory expansion, but every trace out of that BGA needs careful fanout planning. If you're a maker or hobbyist, this package is a tough sell for a breadboard project; look for a TQFP-packaged sibling in the same family instead.