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Texas Instruments LM3S1635-IBZ50-A2T — Microcontrollers & Processors (MCU / MPU / DSP)

LM3S1635-IBZ50-A2T Stellaris ARM Cortex-M3 MCU, 50 MHz

MPNLM3S1635-IBZ50-A2T
NRND

Stellaris® ARM® Cortex®-M3S 1000 series 32-bit MCU, LM3S1635-IBZ50-A2T, 50 MHz core, 128 KB Flash, 32 KB SRAM, 56 I/O, 108-LFBGA, -40°C to 85°C, 2.25 V to 2.75 V supply.

$15.8886Ref. price · indicative, final on quote
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LM3S1635-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, SPI, SSI, UART/USART
Number of i (O)56
Core processorARM® Cortex®-M3
Case108-LFBGA
Data convertersA/D 4x10b
Program memory size128KB (128K x 8)

Product details

Cortex-M3 controller at 50 MHz — what the 108-ball BGA brings to the board

The LM3S1635-IBZ50-A2T: It is suited for embedded control applications — industrial automation, sensor interfaces, motor control, and human-machine interface panels — where a moderate-speed 32-bit core with a compact BGA footprint and a broad peripheral set is required.

For a buyer evaluating this part for a BOM line, the NRND status is the key decision gate: if the design is already in production and the part is qualified, sourcing through independent distribution against an RFQ is the practical path — but for any new design, a pin-compatible or functionally equivalent current-production member of the Stellaris family should be evaluated instead.

Memory and peripheral headroom — 128 KB Flash, 32 KB SRAM, 56 I/O

The 128 KB program memory is adequate for control firmware with moderate code complexity — think PID loops, Modbus stacks, or basic HMI logic — while the 32 KB SRAM provides room for data buffers, communication stacks, and real-time variables. The 4-channel 10-bit ADC covers basic analog sensing, though for higher-resolution or multi-channel analog front ends an external ADC would be needed.

108-ball BGA footprint — layout and rework notes

Frequently asked questions

What is the replacement for LM3S1635-IBZ50-A2T?

For new designs, TI's current Stellaris or Tiva-C ARM Cortex-M4 portfolio should be evaluated for a pin-compatible or functionally equivalent alternative. A buyer should consult the latest TI documentation or contact their distributor to identify a current-production replacement that matches the 50 MHz core, 128 KB Flash, 108-BGA footprint, and peripheral set.

Can I use LM3S1635-IBZ50-A2T in a new design?

TI does not recommend using this NRND part in new designs. If the design is already in production and the part is qualified, sourcing through independent distribution against an RFQ is possible, but for any new project a current-production member of the Stellaris or Tiva-C family should be selected instead.