What the LM3S5G51-IBZ80-A1 is and where it fits
The LM3S5G51-IBZ80-A1 is a 32-bit ARM Cortex-M3 microcontroller from the Stellaris 5000 series. It runs at 80 MHz with 384 KB Flash and 64 KB SRAM. The device integrates a 16-channel 12-bit ADC, a full set of serial interfaces (CAN, I²C, SPI, UART, USB OTG), and peripherals including PWM, watchdog timer, and DMA. The 67 general-purpose I/O and the internal oscillator reduce external component count. It operates over the industrial temperature range of -40°C to 85°C on a 3.0 V to 3.6 V supply, and is housed in a 108-ball BGA (10x10 mm) package — a footprint suited for compact, surface-mount designs where board area is at a premium.
80 MHz Cortex-M3 — what it means for the control loop
At 80 MHz, the ARM Cortex-M3 core delivers 80 MHz clock speed. The 64 KB SRAM limits buffering.
Obsolete — sourcing reality for the LM3S5G51-IBZ80-A1
Texas Instruments has marked the LM3S5G51-IBZ80-A1 as obsolete. No official successor order code is listed. Procurement moves to the independent surplus and broker market. We source and quote it to order against an RFQ through our multi-supplier network.