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Texas Instruments LM3S5P3B-IBZ80-C5T — Microcontrollers & Processors (MCU / MPU / DSP)

LM3S5P3B-IBZ80-C5T Stellaris ARM Cortex-M3 MCU, 80MHz, 64KB Flash

MPNLM3S5P3B-IBZ80-C5T
Obsolete

Texas Instruments Stellaris ARM Cortex-M3S 5000 series 32-bit MCU, LM3S5P3B-IBZ80-C5T, 80MHz, 64KB Flash, 24K x 8 RAM, 67 I/O, CAN/I²C/SPI/UART/USB, 1.08V-1.32V, -40°C to 85°C, 108-BGA.

$6.4425Ref. price · indicative, final on quote
Texas Instruments LM3S5P3B-IBZ80-C5T datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LM3S5P3B-IBZ80-C5T 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, I²S, 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

Stellaris LM3S5P3B — ARM Cortex-M3 at 80 MHz with 64 KB Flash

The Texas Instruments LM3S5P3B-IBZ80-C5T is a 32-bit ARM Cortex-M3 microcontroller from the Stellaris 5000 series, clocked at 80 MHz. Peripheral set includes a 16-channel 10-bit ADC, PWM timers, DMA, and a quadrature encoder interface for motor-control feedback. The part is specified over the industrial temperature range of -40°C to 85°C and operates from a 1.08 V to 1.32 V core supply. It is housed in a 108-ball BGA package (10x10 mm).

The 80 MHz Cortex-M3 core provides 80 DMIPS. The 24 KB SRAM limits buffered applications.

Obsolete — sourcing reality and what replaces it

Texas Instruments has marked the LM3S5P3B-IBZ80-C5T as obsolete.

Frequently asked questions

What is the replacement for LM3S5P3B-IBZ80-C5T?

No official replacement order code is listed. The Stellaris family was succeeded by the Tiva C series, but pin-compatibility is not guaranteed. A board-level redesign is typically required.

What are the specifications of LM3S5P3B-IBZ80-C5T?

It is a 32-bit ARM Cortex-M3 MCU running at 80 MHz with 64 KB Flash, 24 KB SRAM, 67 I/O, a 16-channel 10-bit ADC, and interfaces including CAN, USB, I²C, SPI, and UART. Operating temperature is -40°C to 85°C with a 1.08 V to 1.32 V core supply in a 108-ball BGA package.

Where can I buy LM3S5P3B-IBZ80-C5T?

This obsolete part is sourced through independent distribution. Submit an RFQ for current availability and pricing — stock and lead time are confirmed at quote time.

What is the pinout of LM3S5P3B-IBZ80-C5T?

The pinout is defined in the Texas Instruments datasheet for the LM3S5P3B base part number. The 108-ball BGA ball-map is available in that document.

Is there an alternative to LM3S5P3B-IBZ80-C5T?

No pin-compatible alternative is listed in the record. The Tiva C series from Texas Instruments is the functional successor family but requires a PCB redesign.