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Texas Instruments LM3S1165-IQC50-A2 — Microcontrollers & Processors (MCU / MPU / DSP)

TI LM3S1165-IQC50-A2 ARM Cortex-M3 MCU, 50MHz, 64KB Flash, 100-LQFP

MPNLM3S1165-IQC50-A2
Obsolete

Texas Instruments Stellaris ARM Cortex-M3S 1000 series MCU, LM3S1165-IQC50-A2, 32-Bit Single-Core ARM Cortex-M3 at 50MHz, 64KB Flash, 16KB RAM, 43 I/O, 100-LQFP, -40°C to 85°C.

$16.7400Ref. price · indicative, final on quote
Texas Instruments LM3S1165-IQC50-A2 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LM3S1165-IQC50-A2 specifications
ParameterValue
SeriesStellaris® ARM® Cortex®-M3S 1000
MountingSurface Mount
Oscillator typeInternal
Program memory typeFLASH
Voltage - supply (Vcc (Vdd))2.25V ~ 2.75V
Operating temperature-40°C~85°C(TA)
Speed50MHz
PackageTray
RAM size16K x 8
Core size32-Bit Single-Core
PeripheralsBrown-out Detect/Reset, POR, PWM, WDT
ConnectivityI²C, IrDA, Microwire, SPI, SSI, UART/USART
Number of i (O)43
Core processorARM® Cortex®-M3
Case100-LQFP
Data convertersA/D 4x10b
Program memory size64KB (64K x 8)

Product details

It packs 64 KB of Flash and 16 KB of RAM, with 43 general-purpose I/O lines and a 4-channel 10-bit ADC.

At 50 MHz, this Cortex-M3 delivers enough throughput for a single Modbus RTU master plus a PID loop running at a few kilohertz. The 16 KB RAM is tight for a full TCP/IP stack but comfortable for a bare-metal state machine or a small RTOS with a few tasks. If your firmware needs room for a larger heap or multiple protocol buffers, the 64 KB Flash fills up before the RAM does — watch your linker map.

The 100-LQFP package (14x14 mm) needs a standard reflow profile; the fine pitch means a clean solder paste stencil is non-negotiable.

Frequently asked questions

What are the specifications and pinout of LM3S1165-IQC50-A2?

The LM3S1165-IQC50-A2 is a 32-bit ARM Cortex-M3 MCU running at 50 MHz with 64 KB Flash, 16 KB RAM, 43 I/O, a 4-channel 10-bit ADC, and interfaces including I²C, SPI, UART, and IrDA. It comes in a 100-LQFP package with a 14x14 mm body. The pinout is defined in the Texas Instruments datasheet for the LM3S1165 base part number.

What is the price and lead time for LM3S1165-IQC50-A2?

Pricing and lead time are confirmed at quote time against an RFQ. Because the part is obsolete, availability varies by surplus stock; submit a request for a current quote.