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Texas Instruments LM3S2139-IQC25-A2T
- Part No.:
- LM3S2139-IQC25-A2T
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
LM3S2139-IQC25-A2T.pdf
- Description:
- IC MCU 32BIT 64KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,778
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Product details
Overview
LM3S2139-IQC25-A2T from Texas Instruments is a 32-bit ARM Cortex-M3 microcontroller with 256 KB flash, 32 KB SRAM, integrated CAN 2.0A/B controller, 8-channel 12-bit ADC, and dual UARTs. It operates at 50 MHz, supports -40°C to +85°C industrial temperature range, and targets real-time motor control and industrial automation systems.
For engineers reviewing the LM3S2139-IQC25-A2T datasheet, LM3S2139-IQC25-A2T pinout, LM3S2139-IQC25-A2T application, or LM3S2139-IQC25-A2T equivalent, key selection criteria include CAN interface compliance, flash/SRAM memory sizing, ADC resolution and channel count, operating temperature grade, and Cortex-M3 debug support via JTAG/SWD.
Technical Context
The LM3S2139-IQC25-A2T implements the ARMv7-M architecture with Thumb-2 instruction set, NVIC for low-latency interrupt handling, and SysTick timer for OS tick generation. Its system-level peripherals include a programmable watchdog, GPIO with slew-rate control, and clock gating per peripheral domain.
It integrates a single CAN 2.0A/B controller supporting bit rates up to 1 Mbps, eight 12-bit ADC channels with hardware averaging and temperature sensor input, and two UARTs with IrDA SIR encoding - all synchronized to a single PLL-based system clock tree derived from internal RC or external crystal sources.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 32-bit RISC, executes Thumb-2 instructions with deterministic interrupt latency |
| Max Clock Speed | 50 MHz - defines maximum instruction throughput and peripheral timing margins |
| Flash Memory | 256 KB - sufficient for complex firmware with bootloader, communication stacks, and safety monitoring code |
| SRAM | 32 KB - supports real-time task stacks, CAN message buffers, and ADC sample FIFOs |
| ADC Resolution | 12-bit - enables precise analog sensing in motor current feedback or voltage monitoring |
| CAN Interface | CAN 2.0A/B compliant - supports industrial fieldbus communication with error detection and arbitration |
| Operating Temp | -40°C to +85°C - qualified for uncontrolled industrial cabinet environments |
| Package | 100-pin LQFP (14 mm × 14 mm) - standard surface-mount footprint with thermal pad for power dissipation |
Pinout & Package
LM3S2139-IQC25-A2T is housed in a 100-pin LQFP package with exposed thermal pad (Pb-free, RoHS-compliant). Pin assignments follow TI's standardized Stellaris LM3S series layout, with dedicated JTAG/SWD debug pins, CANH/CANL differential pair, and multiplexed GPIO supporting peripheral functions including UART, SSI, I²C, and PWM.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDC | Power Supply Inputs | Separate digital core (VDDC), analog (VDDA), and I/O (VDD) rails enable noise isolation for ADC and mixed-signal operation |
| CAN0RX / CAN0TX | CAN Bus Interface | Dedicated differential transceiver pins supporting ISO 11898-1 physical layer signaling |
| PA0–PA7, PB0–PB7, etc. | GPIO / Peripheral Multiplex | Configurable as digital I/O or alternate functions (UART0/1, SSI0/1, I²C0, PWM, ADC0–7) |
| TCK, TMS, TDI, TDO, nTRST | JTAG Debug Interface | Full IEEE 1149.1-compliant boundary scan and debug access for firmware development and validation |
| USB0VBUS, USB0ID | USB OTG Support | Enables host/device role negotiation and VBUS sensing - though LM3S2139 lacks on-chip USB PHY |
Key Features
| Feature | Design Value |
|---|---|
| Integrated CAN Controller | Single CAN 2.0A/B module with 32 message objects, configurable FIFO, and bit-rate programming registers - eliminates need for external CAN transceiver logic |
| Hardware ADC Averaging | Up to 64-sample hardware averaging per conversion - reduces software overhead and improves SNR in noisy industrial environments |
| Peripheral Power Control | Individual clock gating per peripheral via RCC register - enables dynamic power scaling during low-duty-cycle operation |
| Internal Temperature Sensor | On-die sensor connected to ADC channel 7 - provides real-time die temperature monitoring without external components |
| NVIC with 8-Level Prioritization | 32 interrupt lines with programmable priority grouping - ensures deterministic response to CAN bus events and fault conditions |
Applications
| Industrial Motor Drives | Building Automation Controllers |
|---|---|
Use Scenario: Closed-loop control of BLDC motors using hall-effect feedback and PWM-driven gate drivers. IC Role / Device Role / Timing Role: Real-time execution of FOC algorithms, CAN-based command distribution, and ADC sampling of phase currents at ≤10 µs intervals. Use Value: Deterministic 50 MHz Cortex-M3 execution and hardware ADC averaging enable stable torque regulation under variable load. | Use Scenario: Central HVAC controller managing damper actuators, temperature sensors, and CO₂ monitors across multiple zones. IC Role / Device Role / Timing Role: CAN network master coordinating distributed nodes, processing analog inputs, and scheduling relay outputs with millisecond precision. Use Value: Integrated CAN controller and 8-channel ADC reduce BOM count and simplify inter-node wiring versus discrete solutions. |
| Factory Floor PLC Modules | Energy Metering Gateways |
Use Scenario: DIN-rail mounted I/O expansion module interfacing with legacy 24 V DC sensors and solenoids. IC Role / Device Role / Timing Role: High-reliability data acquisition and deterministic I/O update via GPIO with programmable slew rate and noise filtering. Use Value: Industrial temperature rating (-40°C to +85°C) and robust GPIO drive strength ensure uptime in harsh factory environments. | Use Scenario: Smart meter concentrator aggregating consumption data from submeters over CAN or RS-485 (via UART + transceiver). IC Role / Device Role / Timing Role: Protocol translation hub with secure flash storage for firmware updates and tamper logs. Use Value: 256 KB flash accommodates dual-bank bootloader and DLMS/COSEM stack with cryptographic signature verification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3S2639-IQC25-A2T | Same core and package, but adds USB 2.0 OTG controller and doubles ADC channels to 16 | Required when USB device/host capability or higher analog channel density is needed | Select LM3S2639-IQC25-A2T only if USB connectivity or expanded ADC is mandatory; otherwise LM3S2139-IQC25-A2T offers lower cost and identical CAN/motor control features |
| TM4C123GH6PM | Newer ARM Cortex-M4F core, 80 MHz, FPU, 256 KB flash, same pinout but enhanced peripherals and extended lifecycle | Preferred for new designs requiring floating-point math, higher performance, or long-term supply assurance | TM4C123GH6PM is not pin-compatible; requires PCB redesign but delivers superior compute headroom and TI's extended product longevity program |
Compared with LM3S2139-IQC25-A2T, LM3S2639-IQC25-A2T adds USB and ADC channels without changing CAN or motor control capability, while TM4C123GH6PM upgrades to Cortex-M4F with FPU and longer manufacturer support - making it suitable for next-generation designs where computational headroom and roadmap continuity matter.
Availability
LM3S2139-IQC25-A2T is available at Aetrix Electronics and suitable for industrial motor drives, building automation controllers, and factory floor PLC modules requiring stable component supply and long-lifecycle assurance.
Supply support for LM3S2139-IQC25-A2T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor company headquartered in Dallas, Texas, delivering analog, embedded processing, and wireless technologies for industrial, automotive, and consumer markets.
The Stellaris LM3S family was designed specifically for cost-sensitive, real-time industrial control applications requiring integrated CAN, deterministic interrupt response, and robust analog signal acquisition - positioning LM3S2139-IQC25-A2T as a focused solution for CAN-based automation nodes.
FAQ
What is the maximum operating frequency of the LM3S2139-IQC25-A2T?
The LM3S2139-IQC25-A2T operates at a maximum system clock frequency of 50 MHz. This speed is achieved using an internal PLL that multiplies the input clock source - whether from the internal 6 MHz RC oscillator or an external crystal. The 50 MHz specification is guaranteed across the full -40°C to +85°C industrial temperature range and under specified VDD conditions, enabling deterministic real-time execution for motor control and CAN messaging tasks in the LM3S2139-IQC25-A2T.
Does the LM3S2139-IQC25-A2T include a CAN controller?
Yes, the LM3S2139-IQC25-A2T integrates a single CAN 2.0A/B-compliant controller with 32 message objects, programmable bit timing, and hardware acceptance filtering. It supports both standard (11-bit) and extended (29-bit) identifiers and includes dedicated CAN0RX and CAN0TX pins in its 100-pin LQFP package. This on-chip CAN controller eliminates the need for external CAN protocol ICs in applications such as industrial fieldbus nodes and motor drive command interfaces using the LM3S2139-IQC25-A2T.
What memory resources does the LM3S2139-IQC25-A2T provide?
The LM3S2139-IQC25-A2T includes 256 KB of on-chip flash memory for program storage and 32 KB of SRAM for runtime data and stack usage. Flash supports in-application programming (IAP) and has built-in ECC for reliability. SRAM is unified and accessible by CPU and DMA, enabling efficient buffering of CAN messages, ADC samples, and communication protocol stacks. These memory sizes are fixed for the LM3S2139-IQC25-A2T and do not vary by temperature grade or packaging variant.
Is the LM3S2139-IQC25-A2T supported by modern development tools?
Yes, the LM3S2139-IQC25-A2T is supported by TI's legacy StellarisWare Peripheral Driver Library and Keil MDK-ARM v4.x with appropriate device support packs. While newer TI tools like Code Composer Studio v10+ focus on TM4C devices, the LM3S2139-IQC25-A2T remains compatible with GCC-based toolchains (e.g., arm-none-eabi-gcc) and OpenOCD for JTAG/SWD debugging. TI continues to host archived documentation and driver examples for the LM3S2139-IQC25-A2T on their official website.
What is the thermal pad configuration for the LM3S2139-IQC25-A2T package?
The LM3S2139-IQC25-A2T uses a 100-pin LQFP package with an exposed thermal pad on the underside. This pad must be soldered to a PCB copper pour connected to the ground plane to ensure proper thermal dissipation and electrical stability. TI's datasheet specifies minimum solder paste coverage and reflow profile requirements for reliable attachment. Failure to properly connect the thermal pad may result in elevated junction temperatures and reduced long-term reliability of the LM3S2139-IQC25-A2T in continuous industrial operation.
LM3S2139-IQC25-A2T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 100-LQFP
- Series:
- Stellaris® ARM® Cortex®-M3S 2000
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Programmable:
- Verified
- Core Processor:
- ARM® Cortex®-M3
- Core Size:
- 32-Bit Single-Core
- Speed:
- 25MHz
- Connectivity:
- CANbus, I2C, IrDA, Microwire, SPI, SSI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O:
- 56
- Program Memory Size:
- 64KB (64K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 16K x 8
- Voltage - Supply (Vcc/Vdd):
- 2.25V ~ 2.75V
- Data Converters:
- A/D 4x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
LM3S2139-IQC25-A2T FAQ
1.How can I place an order for LM3S2139-IQC25-A2T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S2139-IQC25-A2T on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LM3S2139-IQC25-A2T reliable?
The price and inventory of LM3S2139-IQC25-A2T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3S2139-IQC25-A2T is usually 5 days.
3.What payment methods are accepted for LM3S2139-IQC25-A2T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S2139-IQC25-A2T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S2139-IQC25-A2T?
LM3S2139-IQC25-A2T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S2139-IQC25-A2T order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LM3S2139-IQC25-A2T?
For technical support, including LM3S2139-IQC25-A2T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S2139-IQC25-A2T requirements.
6.How does Aetrix verify that LM3S2139-IQC25-A2T is sourced from the original manufacturer or authorized distributors?
All LM3S2139-IQC25-A2T products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LM3S2139-IQC25-A2T meets industry standards.
7.What is the process for return or replacement of LM3S2139-IQC25-A2T?
All LM3S2139-IQC25-A2T units undergo pre-shipment inspection (PSI). If there is an issue with LM3S2139-IQC25-A2T, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LM3S2139-IQC25-A2T part is unused and in its original packaging.
Return procedure for LM3S2139-IQC25-A2T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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