Texas Instruments MSP430FR5859IDA, 16-bit MSP430 CPUXV2 MCU, 64 KB FRAM, 2 KB SRAM, 16 MHz, 31 I/O, 1.8 V–3.6 V, -40°C–85°C, 38-TSSOP.
| Parameter | Value |
|---|---|
| Series | MSP430™ FRAM |
| Mounting | Surface Mount |
| Oscillator type | Internal |
| Program memory type | FRAM |
| Voltage - supply (Vcc (Vdd)) | 1.8V ~ 3.6V |
| Operating temperature | -40°C~85°C(TA) |
| Speed | 16MHz |
| Package | Tube |
| RAM size | 2K x 8 |
| Core size | 16-Bit |
| Peripherals | Brown-out Detect/Reset, DMA, POR, PWM, WDT |
| Connectivity | I²C, IrDA, SCI, SPI, UART/USART |
| Number of i (O) | 31 |
| Core processor | MSP430 CPUXV2 |
| Case | 38-TSSOP (0.240\", 6.10mm Width) |
| Data converters | A/D 12x12b |
| Program memory size | 64KB (64K x 8) |
FRAM writes at near-SRAM speed without an erase cycle, so you can treat it like a nonvolatile data buffer — useful for logging sensor readings or storing configuration parameters without wearing out the memory. The 16 MHz clock is enough for UART/SPI/I²C protocol handling and moderate sensor fusion loops.
Programming uses the MSP430 JTAG or Spy-Bi-Wire (SBW) interface, supported by TI's Code Composer Studio and IAR Embedded Workbench. FRAM programming does not require an erase cycle, so firmware updates are faster than with Flash-based MCUs.
The two parts share the same core, package, and peripheral set; the difference is program memory size. MSP430FR5859IDA has 64 KB FRAM, while MSP430FR5858IDA has 48 KB FRAM. Pin-compatible, so a BOM swap requires only a firmware size check.