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Texas Instruments LM3S1D21-IQC80-A1 — Microcontrollers & Processors (MCU / MPU / DSP)
Texas Instruments

Texas Instruments LM3S1D21-IQC80-A1 Stellaris ARM Cortex-M3 MCU, 80 MHz

MPNLM3S1D21-IQC80-A1
Obsolete

Texas Instruments Stellaris ARM Cortex-M3S 1000 series LM3S1D21-IQC80-A1, 32-bit single-core MCU, 80 MHz, 512 KB Flash, 96 KB RAM, 100-LQFP, -40 to 85°C.

$7.8700Ref. price · indicative, final on quote
LM3S1D21-IQC80-A1 datasheet
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Specifications

LM3S1D21-IQC80-A1 Technical Specifications
ParameterValue
SeriesStellaris® ARM® Cortex®-M3S 1000
Mounting typeSurface Mount
Oscillator typeInternal
Program memory typeFLASH
Voltage - supply (Vcc (Vdd))1.235V ~ 1.365V
Operating temperature-40°C~85°C(TA)
Speed80MHz
PackageTray
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
Case100-LQFP
Data convertersA/D 8x12b
Program memory size512KB (512K x 8)

Product details

What this part is and where it fits

The Texas Instruments LM3S1D21-IQC80-A1 is a 32-bit ARM Cortex-M3 MCU from the Stellaris series, clocked at 80 MHz with 512 KB of Flash and 96 KB of RAM. It carries 67 I/O lines, an 8-channel 12-bit ADC, and serial interfaces including I²C, SPI, SSI, UART, IrDA, LIN, and Microwire, plus an external bus interface. The 100-LQFP package (14x14 mm body) and industrial temperature range (-40 to 85 °C) suit it for factory automation, motor control, and outdoor telecom equipment.

Obsolete — sourcing reality

The LM3S1D21-IQC80-A1 is marked obsolete by Texas Instruments. No official successor part number is listed in the lifecycle record. For existing BOM lines, this part is available through independent distribution — sourced and quoted to order against an RFQ. Availability and current pricing are confirmed at quote time. This is not a part for new designs; plan a migration to a current-generation Cortex-M3 or M4 if you are still qualifying it.

Frequently asked questions

Is LM3S1D21-IQC80-A1 obsolete?

Yes, the LM3S1D21-IQC80-A1 is marked obsolete by Texas Instruments. It is not recommended for new designs. Existing BOM lines can be filled through independent distribution — submit an RFQ for current availability and pricing.

What is the replacement for LM3S1D21-IQC80-A1?

No official replacement part number is listed in the lifecycle record. For a pin-compatible migration path, evaluate other Stellaris LM3S series parts in the same 100-LQFP package, but verify peripheral compatibility and supply voltage (1.235 V to 1.365 V core) against your design.

What is LM3S1D21-IQC80-A1's listed speed?

The core runs at 80 MHz, based on the ARM Cortex-M3 architecture. That clock rate delivers roughly 100 MIPS with the single-cycle multiply and hardware divide.

What is the pinout of LM3S1D21-IQC80-A1?

The device is housed in a 100-LQFP package (14x14 mm) with 67 general-purpose I/O pins. The full pinout is available in the Texas Instruments datasheet for the LM3S1D21.