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Texas Instruments LM3S1N16-IQR50-C0 — Microcontrollers & Processors (MCU / MPU / DSP)

LM3S1N16-IQR50-C0 Stellaris ARM Cortex-M3 MCU, 50MHz

MPNLM3S1N16-IQR50-C0
Obsolete

Texas Instruments Stellaris ARM Cortex-M3S 1000 series LM3S1N16-IQR50-C0, 32-Bit Single-Core MCU, 50MHz, 64KB Flash, 12K x 8 RAM, 33 I/O, I²C/SPI/UART/LIN, 8x10b ADC, -40°C~85°C, 64-LQFP.

Texas Instruments LM3S1N16-IQR50-C0 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LM3S1N16-IQR50-C0 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 size12K 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)33
Core processorARM® Cortex®-M3
Case64-LQFP
Data convertersA/D 8x10b
Program memory size64KB (64K x 8)

Product details

For a BOM that already qualifies this MCU, the only supply path is through independent distribution — surplus stock, new-old-stock, or broker channels.

The 50 MHz ARM Cortex-M3 core delivers around 1.25 DMIPS/MHz, enough for a PID loop at a few kHz, Modbus RTU polling, or a simple HMI with a character LCD. The 64 KB Flash is tight for a full TCP/IP stack — plan for a lightweight protocol like CoAP or a serial-only application.

The LM3S1N16 covers the common serial buses: I²C for sensors and EEPROMs, SPI for ADCs or displays, UART for RS-232/RS-485, and LIN for automotive subnets. The IrDA and Microwire interfaces are less common but useful for IR remote control or legacy SPI peripherals. The 8-channel 10-bit ADC at 500 ksps typical is fine for reading potentiometers, thermistors, or current-sense resistors with a simple RC filter.

Frequently asked questions

Is the LM3S1N16-IQR50-C0 obsolete?

Yes, the LM3S1N16-IQR50-C0 carries an Obsolete lifecycle status. Texas Instruments no longer manufactures it. The only supply path is through surplus or broker inventory.

What is a direct replacement for the LM3S1N16-IQR50-C0?

For new designs, consider a newer Stellaris or TM4C series Cortex-M4 part in a 64-LQFP package — they offer more Flash and a floating-point unit, but the pinout and peripheral set differ. A full datasheet comparison is needed before substituting.

Does the LM3S1N16-IQR50-C0 have a replacement from Texas Instruments?

Texas Instruments has not listed a specific successor order code for this part. The Stellaris family transitioned to the TM4C series (Cortex-M4F), but those are not pin-compatible drop-ins. A cross-reference requires reviewing the TM4C123 or TM4C129 datasheet for a similar peripheral set and package.