LM3S1R21-IQC80-C3 Texas Instruments Integrated Circuit (Other) In Stock
Texas Instruments LM3S1R21-IQC80-C3 is a 32-bit ARM Cortex-M3 microcontroller clocked at up to 16 MHz with 67 I/O lines, integrated ADC and DMA, and a 100-pin LQFP package. It provides on-chip Flash, SRAM, and multiple serial communication peripherals suited for real-time embedded control. Available in stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Other
- Pin Count
- 100
- Lifecycle
- OBSOLETE
- Datasheet
- LM3S1R21-IQC80-C3 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of LM3S1R21-IQC80-C3?
- 32-bit ARM Cortex-M3 core at up to 16 MHz delivering deterministic instruction execution for real-time embedded control tasks
- 67 configurable I/O lines in a 100-pin LQFP package maximizing peripheral connectivity in mid-complexity embedded designs
- Integrated multi-channel ADC for direct analog sensor acquisition eliminating the need for external converter ICs
- On-chip DMA controller enabling high-throughput peripheral-to-memory data transfers while freeing the CPU for control processing
- Multiple serial interfaces including UART, SPI, and I2C supporting flexible multi-device communication on a single MCU
What is LM3S1R21-IQC80-C3 used for?
The LM3S1R21-IQC80-C3 is intended for industrial monitoring, process control, and building automation systems where the 32-bit Cortex-M3 core at 16 MHz handles real-time sensor acquisition and control loop execution. Its 67 I/O lines and integrated DMA support multi-channel ADC sampling alongside concurrent serial communications in energy meters, access control panels, and HVAC controllers. The 100-pin LQFP package suits medium-density control boards where adequate I/O count and peripheral integration are required without stepping up to a larger, more expensive microcontroller.
What are the specifications of LM3S1R21-IQC80-C3?
| Pbfree Code | Yes |
| YTEOL | 0 |
| Has ADC | YES |
| Bit Size | 32 |
| Boundary Scan | NO |
| Clock Frequency-Max | 16MHz |
| DAC Channels | NO |
| DMA Channels | YES |
| JESD-30 Code | S-PQFP-G100 |
| Number of I/O Lines | 67 |
| On Chip Program ROM Width | 8 |
| PWM Channels | YES |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | QFP100,.63SQ,20 |
| Package Shape | SQUARE |
| Package Style | FLATPACK |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| RAM (bytes) | 49152 |
| ROM (words) | 262144 |
| ROM Programmability | FLASH |
| Speed | 80MHz |
| Supply Voltage-Max | 3.6V |
| Supply Voltage-Min | 3.3V |
| Supply Voltage-Nom | 3.3V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.5mm |
| Terminal Position | QUAD |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| uPs/uCs/Peripheral ICs Type | MICROCONTROLLER |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 3 |
| HTS Code | 8542.31.00.25 |
Where can I find the LM3S1R21-IQC80-C3 datasheet?
LM3S1R21-IQC80-C3 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for LM3S1R21-IQC80-C3?
Compatible alternatives and drop-in replacements for LM3S1R21-IQC80-C3:
Frequently Asked Questions
How does LM3S1R21-IQC80-C3 differ from LM3S1P51-IQC80-C3 for a new design selection?
Both LM3S1R21-IQC80-C3 and LM3S1P51-IQC80-C3 share the same 32-bit ARM Cortex-M3 core at 16 MHz, 67 I/O lines, and 100-pin LQFP package. Key differences lie in their internal memory configurations and peripheral set variants within the Stellaris family — the R-series targets applications emphasizing different Flash or SRAM sizes versus the P-series. Consult the Texas Instruments LM3S1R21 datasheet for exact Flash and SRAM sizes to verify they meet firmware and data-buffer requirements.
Does the integrated ADC on LM3S1R21-IQC80-C3 support simultaneous multi-channel sampling?
The LM3S1R21-IQC80-C3 includes a multi-channel 10-bit or 12-bit ADC (confirm resolution in the device-specific datasheet) capable of sequential or simultaneous sample-sequencer operation across multiple input channels. Using the DMA controller in conjunction with the ADC, the device can continuously fill a sample buffer in SRAM at conversion rates supported by the 16 MHz clock while the Cortex-M3 core executes filtering or control algorithms on previously captured data.
What serial interfaces does LM3S1R21-IQC80-C3 provide for connecting sensors and host systems?
The LM3S1R21-IQC80-C3 integrates multiple UART channels for asynchronous serial communication at up to 921600 baud, SSI (SPI-compatible) interfaces at up to 8 MHz, and I2C ports operating at standard 100 kHz and fast 400 kHz modes. This combination allows simultaneous connection to RS-485 field buses, SPI Flash or EEPROM storage, and I2C sensors such as temperature or humidity transducers within the same embedded control system.
What power-supply voltage range does LM3S1R21-IQC80-C3 require for embedded industrial designs?
The LM3S1R21-IQC80-C3 operates from a 3.3 V regulated supply, which is the standard I/O voltage for the Stellaris LM3S1R21 device. Industrial designs should include 100 nF ceramic decoupling capacitors on each VDD pin placed within 2 mm of the pin, and a bulk 10 µF capacitor per power domain to maintain clean supply during DMA burst transfers or peak ADC conversion currents, ensuring stable 16 MHz clock operation across the full −40 °C to 85 °C commercial temperature range.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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