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Texas Instruments LM3S1850-IBZ50-A2T — Microcontrollers & Processors (MCU / MPU / DSP)

TI LM3S1850-IBZ50-A2T Stellaris ARM Cortex-M3, 50MHz, NRND

MPNLM3S1850-IBZ50-A2T
NRND

Texas Instruments Stellaris ARM Cortex-M3S 1000 series 32-bit MCU, LM3S1850-IBZ50-A2T, 50MHz, 256KB Flash, 32K x 8 RAM, 56 I/O, 108-LFBGA, -40°C to 85°C, Tape & Reel.

$17.4548Ref. price · indicative, final on quote
Texas Instruments LM3S1850-IBZ50-A2T datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LM3S1850-IBZ50-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
Case108-LFBGA
Program memory size256KB (256K x 8)

Product details

Stellaris ARM Cortex-M3 at 50 MHz — what this part delivers

The Texas Instruments LM3S1850-IBZ50-A2T is a 32-bit ARM Cortex-M3 MCU from the Stellaris series, clocked at 50 MHz with 256 KB of Flash program memory and 32 KB of SRAM. The 56 GPIOs are brought out to a 108-ball BGA package (10x10 mm), and the part is rated for the -40°C to 85°C industrial temperature range.

NRND — no longer recommended for new designs

The LM3S1850-IBZ50-A2T carries a Not Recommended for New Designs (NRND) lifecycle status. This means Texas Instruments will continue to support existing production builds for a defined window, but the part is not intended for new design-ins.

The 56 GPIOs, combined with the QEI and PWM peripherals, make this a natural fit for brushless DC motor control with encoder feedback — a common Stellaris deployment pattern.

Frequently asked questions

Is LM3S1850-IBZ50-A2T obsolete?

The LM3S1850-IBZ50-A2T is NRND (Not Recommended for New Designs), not fully discontinued. Production continues for existing customers, but new design-ins are not advised. The part is sourced to order against an RFQ through independent distribution.

What is the replacement for LM3S1850-IBZ50-A2T?

No official replacement part number is listed in the lifecycle record. For a pin-compatible or functionally equivalent alternative, review the Stellaris family for a device with a similar peripheral set and BGA footprint, or contact us with your BOM for a cross-reference search.

What does NRND mean for LM3S1850-IBZ50-A2T?

NRND means the manufacturer will not accept new design registrations for this part. Existing production orders are still supported, but the part is on a path toward end-of-life. Plan for a last-time buy or a migration to a replacement device.

Where can I buy LM3S1850-IBZ50-A2T?

The LM3S1850-IBZ50-A2T is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm response.

Can I use LM3S1850-IBZ50-A2T in a new design?

The NRND status means Texas Instruments does not recommend this part for new designs. For a production program that has not yet locked the BOM, select an active Stellaris or TM4C family device instead.

What is LM3S1850-IBZ50-A2T's listed speed?

The core is rated for 50 MHz operation. This is the maximum clock frequency for the ARM Cortex-M3 processor on this device.