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Texas Instruments LM3S1J11-IQC50-C1 — Microcontrollers & Processors (MCU / MPU / DSP)

LM3S1J11-IQC50-C1 Stellaris ARM Cortex-M3 MCU, 50MHz, 128KB Flash

MPNLM3S1J11-IQC50-C1
Obsolete

Texas Instruments Stellaris ARM Cortex-M3S 1000 series LM3S1J11-IQC50-C1, 32-bit single-core MCU, 50MHz, 128KB (128K x 8) Flash, 20K x 8 RAM, 100-LQFP, -40°C to 85°C.

Texas Instruments LM3S1J11-IQC50-C1 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LM3S1J11-IQC50-C1 specifications
ParameterValue
SeriesStellaris® ARM® Cortex®-M3S 1000
MountingSurface Mount
Oscillator typeInternal
Program memory typeFLASH
Voltage - supply (Vcc (Vdd))1.08V ~ 3.6V
Operating temperature-40°C~85°C(TA)
Speed50MHz
PackageTray
RAM size20K x 8
Core size32-Bit Single-Core
PeripheralsBrown-out Detect/Reset, DMA, POR, PWM, WDT
ConnectivityI²C, IrDA, LINbus, Microwire, SPI, SSI, UART/USART
Number of i (O)67
Core processorARM® Cortex®-M3
Case100-LQFP
Data convertersA/D 8x10b
Program memory size128KB (128K x 8)

Product details

The LM3S1J11-IQC50-C1 is a 32-bit ARM Cortex-M3 MCU from TI's Stellaris 1000 series, clocked at 50 MHz with 128 KB of Flash and 20K x 8 of RAM. It has 67 I/O lines, an 8-channel 10-bit ADC, and serial interfaces including I²C, SPI, UART, and LIN.

The 50 MHz Cortex-M3 core delivers enough throughput for real-time control loops (PID, encoder polling) and protocol handling (Modbus RTU, CAN) without external RAM for moderate-size firmware. The 128 KB Flash holds a mid-complexity application stack; the 20 KB RAM handles local data buffers and stack. If your firmware exceeds that, you are looking at a different density tier in the Stellaris family or a newer Cortex-M4 part.

Package and integration note

Frequently asked questions

Is LM3S1J11-IQC50-C1 obsolete?

Yes, the LM3S1J11-IQC50-C1 is obsolete. The manufacturer has discontinued production; no official successor is listed. Sourcing is limited to surplus and broker inventory — quoted to order against an RFQ.

What is the replacement for LM3S1J11-IQC50-C1?

No official direct replacement is listed in the manufacturer's records. For a pin-compatible alternative, a cross-reference search within the Stellaris 1000 series or a migration to a newer TI Cortex-M4 part (e.g., TM4C series) may be required — verify pinout and peripheral compatibility against your BOM.

What are the key specifications of LM3S1J11-IQC50-C1?

The MCU runs at 50 MHz with a 32-bit ARM Cortex-M3 core, 128 KB Flash, 20K x 8 RAM, 67 I/O, an 8-channel 10-bit ADC, and serial interfaces including I²C, SPI, UART, and LIN. It operates from 1.08 V to 3.6 V over -40°C to 85°C in a 100-LQFP package.