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Texas Instruments LM3S5P31-IBZ80-C1T — Microcontrollers & Processors (MCU / MPU / DSP)

TI LM3S5P31-IBZ80-C1T ARM Cortex-M3 MCU, 80 MHz, 64 KB Flash

MPNLM3S5P31-IBZ80-C1T
Obsolete

Texas Instruments Stellaris ARM Cortex-M3S 5000 series microcontroller, LM3S5P31-IBZ80-C1T, 80 MHz, 64 KB flash, 24 KB RAM, 108-BGA, -40 to 85°C.

Texas Instruments LM3S5P31-IBZ80-C1T datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LM3S5P31-IBZ80-C1T specifications
ParameterValue
SeriesStellaris® ARM® Cortex®-M3S 5000
MountingSurface Mount
Oscillator typeInternal
Program memory typeFLASH
Voltage - supply (Vcc (Vdd))1.08V ~ 1.32V
Operating temperature-40°C~85°C(TA)
Speed80MHz
PackageTape & Reel (TR)
RAM size24K x 8
Core size32-Bit Single-Core
PeripheralsBrown-out Detect/Reset, DMA, POR, PWM, WDT
ConnectivityCANbus, I²C, IrDA, LINbus, Microwire, QEI, SPI, SSI, UART/USART, USB
Number of i (O)67
Core processorARM® Cortex®-M3
Case108-LFBGA
Data convertersA/D 16x10b
Program memory size64KB (64K x 8)

Product details

80 MHz Cortex-M3 with CAN and USB

The LM3S5P31-IBZ80-C1T: On-chip memory is 64 KB of flash and 24 KB of SRAM, which fits a moderate application with a real-time OS but leaves little margin for a full Ethernet or graphics library.

Peripheral set for industrial control

Connectivity includes CAN, USB (device/host/OTG), UART, SPI, I2C, IrDA, and LIN — enough to bridge a CANopen fieldbus to a USB diagnostic port while logging data over UART. The 16-channel 10-bit ADC and quadrature encoder interface (QEI) make it a natural fit for motor-feedback or sensor-input applications. 67 general-purpose I/O pins are available in the 108-BGA package — enough to interface a parallel LCD or a bank of opto-coupled inputs without an external GPIO expander.

Frequently asked questions

Is LM3S5P31-IBZ80-C1T obsolete?

Yes, Texas Instruments has marked this part as obsolete.

Where can I buy LM3S5P31-IBZ80-C1T available via RFQ confirmation?

We source this obsolete MCU through independent distribution. Submit an RFQ for current availability and pricing — stock is lot-specific and confirmed at quote time.

What is the pinout for LM3S5P31-IBZ80-C1T?

The pinout is defined in the Texas Instruments datasheet for the LM3S5P31 family. The 108-ball BGA ball map is documented there — no pinout detail is carried in this listing.

What is the replacement for LM3S5P31-IBZ80-C1T?

A functional replacement would require a different MCU family and a board spin — no direct drop-in exists.

Can LM3S5P31-IBZ80-C1T be used as a replacement for LM3S5P31-IBZ80-C1?

The LM3S5P31-IBZ80-C1T is the tape-and-reel variant of the base part LM3S5P31-IBZ80-C1. Electrically and functionally identical — the only difference is the packaging format (reel vs tray).