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Texas Instruments LM3S1850-IQC50-A2T — Microcontrollers & Processors (MCU / MPU / DSP)

LM3S1850-IQC50-A2T Stellaris ARM Cortex-M3 MCU, 50 MHz, 256 KB Flash, 100-LQFP

MPNLM3S1850-IQC50-A2T
NRND

Texas Instruments Stellaris® ARM® Cortex®-M3S 1000 series LM3S1850-IQC50-A2T, 32-Bit Single-Core MCU, 50MHz, 256KB Flash, 32K x 8 RAM, 56 I/O, 2.25V~2.75V, -40°C~85°C, 100-LQFP.

$14.4358Ref. price · indicative, final on quote
Texas Instruments LM3S1850-IQC50-A2T datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LM3S1850-IQC50-A2T 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
PackageTape & Reel (TR)
RAM size32K x 8
Core size32-Bit Single-Core
PeripheralsBrown-out Detect/Reset, POR, PWM, WDT
ConnectivityI²C, IrDA, Microwire, QEI, SPI, SSI, UART/USART
Number of i (O)56
Core processorARM® Cortex®-M3
Case100-LQFP
Program memory size256KB (256K x 8)

Product details

What this Stellaris MCU brings to a control board

The LM3S1850-IQC50-A2T is a 32-bit ARM Cortex-M3 microcontroller from the Stellaris® series, clocked at 50 MHz with 256 KB of Flash and 32 KB of RAM.

50 MHz core — enough for real-time loops, not for heavy DSP

The 50 MHz Cortex-M3 handles PID loops, Modbus packet parsing, and display updates without breaking a sweat. If your algorithm needs floating-point or sustained multiply-accumulate, you'd look at a Cortex-M4F part instead — this core is about control logic and communication, not signal processing.

NRND — plan your BOM accordingly

For existing production, we source it through independent distribution.

Frequently asked questions

Is LM3S1850-IQC50-A2T obsolete or recommended for new designs?

It is NRND (Not Recommended for New Designs) per Texas Instruments. Existing production can still be sourced through independent distribution; we quote it against an RFQ.

What is a direct replacement for LM3S1850-IQC50-A2T?

No official direct replacement is listed. For a pin-compatible alternative within the Stellaris LM3S family, check active siblings in the same 100-LQFP footprint — the peripheral set and pinout are shared across the series.

Does LM3S1850-IQC50-A2T require an external oscillator?

No — it has an internal oscillator, so you can omit the external crystal for many applications. Use the internal clock when timing accuracy within a few percent is acceptable.

How many I/O pins does LM3S1850-IQC50-A2T have?

56 I/O pins, available on the 100-LQFP package.

Where can I buy LM3S1850-IQC50-A2T and how do I get a price?

We source this NRND part to order through independent distribution. Submit an RFQ for current availability and pricing — confirmed at quote time.

What is LM3S1850-IQC50-A2T's listed speed?

50 MHz, from the ARM Cortex-M3 core.