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Texas Instruments LM3S1D21-IBZ80-A2T — Microcontrollers & Processors (MCU / MPU / DSP)

LM3S1D21-IBZ80-A2T Stellaris ARM Cortex-M3 MCU, 80 MHz

MPNLM3S1D21-IBZ80-A2T
Obsolete

Texas Instruments Stellaris® ARM® Cortex®-M3S 1000 series LM3S1D21-IBZ80-A2T, 32-Bit Single-Core MCU, 80MHz, 512KB Flash, 96K x 8 RAM, 67 I/O, 108-LFBGA, -40°C~85°C.

Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LM3S1D21-IBZ80-A2T specifications
ParameterValue
SeriesStellaris® ARM® Cortex®-M3S 1000
MountingSurface Mount
Oscillator typeInternal
Program memory typeFLASH
Voltage - supply (Vcc (Vdd))1.235V ~ 1.365V
Operating temperature-40°C~85°C(TA)
Speed80MHz
PackageTape & Reel (TR)
RAM size96K x 8
Core size32-Bit Single-Core
PeripheralsBrown-out Detect/Reset, DMA, POR, PWM, WDT
ConnectivityEBI/EMI, I²C, IrDA, LINbus, Microwire, SPI, SSI, UART/USART
Number of i (O)67
Core processorARM® Cortex®-M3
Case108-LFBGA
Data convertersA/D 8x12b
Program memory size512KB (512K x 8)

Product details

108-BGA footprint and industrial temperature range

Housed in a 108-ball LFBGA (10x10 mm body), this part demands a fine-pitch BGA layout — expect via-in-pad or microvia routing for the center balls. Supply voltage is a tight 1.235 V to 1.365 V core rail, so the board needs a clean 1.3 V LDO or switcher with low ripple; the I/O bank runs from a separate 3.3 V supply (not listed here but standard for the Stellaris family). An internal oscillator is on-die, but for precision CAN or USB timing an external crystal is still the safer call.

For BOM lines that still need this exact MCU — legacy product support, field-service repairs, or a design that cannot migrate — the only channel is the surplus and broker market. If your project is still in design, consider a pin-compatible Stellaris sibling or a current TI Cortex-M4 part with a similar peripheral map to avoid a future last-time-buy scramble.

Frequently asked questions

Is LM3S1D21-IBZ80-A2T obsolete?

Yes, the lifecycle status for LM3S1D21-IBZ80-A2T is obsolete.

What is the replacement for LM3S1D21-IBZ80-A2T?

No official replacement order code is recorded for LM3S1D21-IBZ80-A2T. For new designs, consider a current TI Cortex-M4 MCU with similar Flash and RAM sizing; for legacy BOMs, source through surplus channels against an RFQ.

What are the specifications of LM3S1D21-IBZ80-A2T?

It has 512 KB Flash, 96 KB RAM, 67 I/O, an 8-channel 12-bit ADC, and peripherals including EBI/EMI, I²C, SPI, UART, and PWM.