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Texas Instruments LM3S5C31-IBZ80-A2T — Microcontrollers & Processors (MCU / MPU / DSP)

Texas Instruments LM3S5C31-IBZ80-A2T ARM Cortex-M3 MCU, 80MHz

MPNLM3S5C31-IBZ80-A2T
Obsolete

Texas Instruments LM3S5C31-IBZ80-A2T, Stellaris ARM Cortex-M3S 5000 series, 32-bit single-core at 80MHz, 512KB Flash / 64KB RAM, 67 I/O, CANbus/LINbus/I²C/SPI/SSI/UART/USB, 3V–3.6V supply, 108-LFBGA, −40°C–85°C, Tape & Reel.

Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LM3S5C31-IBZ80-A2T specifications
ParameterValue
SeriesStellaris® ARM® Cortex®-M3S 5000
MountingSurface Mount
Oscillator typeInternal
Program memory typeFLASH
Voltage - supply (Vcc (Vdd))3V ~ 3.6V
Operating temperature-40°C~85°C(TA)
Speed80MHz
PackageTape & Reel (TR)
RAM size64K x 8
Core size32-Bit Single-Core
PeripheralsBrown-out Detect/Reset, DMA, POR, PWM, WDT
ConnectivityCANbus, EBI/EMI, I²C, IrDA, LINbus, Microwire, QEI, SPI, SSI, UART/USART, USB
Number of i (O)67
Core processorARM® Cortex®-M3
Case108-LFBGA
Data convertersA/D 16x12b
Program memory size512KB (512K x 8)

Product details

The Texas Instruments LM3S5C31-IBZ80-A2T is a 32-bit ARM Cortex-M3 MCU from the Stellaris® series, running at 80 MHz with 512 KB Flash and 64 KB RAM.

80 MHz Cortex-M3 — throughput for protocol-heavy control

The 80 MHz core speed on this ARM Cortex-M3 gives enough headroom to run a CANopen stack alongside a PID loop and USB device enumeration without stalling. The 512 KB Flash is generous for a Stellaris-class part — you can fit a full bootloader, application firmware, and a small file system. The 64 KB RAM is adequate for moderate data buffers; if your application needs large packet queues or a framebuffer, watch the RAM budget.

Obsolete — sourcing from surplus and broker channels

Frequently asked questions

What is the replacement for LM3S5C31-IBZ80-A2T?

No official direct replacement is listed by Texas Instruments. For new designs, consider TI's Tiva™ C Series (e.g., TM4C123GH6PM) as a functional upgrade, but verify pinout and peripheral differences. For existing BOM lines, source through surplus channels.

Is LM3S5C31-IBZ80-A2T a direct drop-in replacement for LM3S5C31-IBZ80-A2?

The suffix difference (A2T vs A2) typically indicates packaging or tape-and-reel variation, not a functional change. The A2T variant is Tape & Reel packaging; the A2 may be tray or tube. Electrical characteristics are identical per the base part number. Confirm the package code with the datasheet before ordering.

What is the lead time for LM3S5C31-IBZ80-A2T?

Lead time depends on current surplus availability. Since the part is obsolete, there is no factory lead time. Independent distributors quote lead time based on existing stock. Submit an RFQ for current availability and delivery estimates.