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Texas Instruments LM3S2950-EQC50-A2
- Part No.:
- LM3S2950-EQC50-A2
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
LM3S2950-EQC50-A2.pdf
- Description:
- IC MCU 32BIT 256KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LM3S2950-EQC50-A2 from Texas Instruments is a 32-bit ARM Cortex-M3 microcontroller with 256 KB flash, 64 KB SRAM, integrated CAN 2.0A/B controller, hibernation module with RTC and battery-backed memory, and operates at up to 50 MHz. It targets industrial motor control and embedded automation systems requiring deterministic real-time response and low-power hibernation.
For engineers reviewing the LM3S2950-EQC50-A2 datasheet, LM3S2950-EQC50-A2 pinout, LM3S2950-EQC50-A2 application, or LM3S2950-EQC50-A2 equivalent, key selection criteria include its 50 MHz CPU clock, dual UART + SSI + I²C + CAN interfaces, hibernation current of 1.7 µA, 10-bit 8-channel ADC, and QFP-100 package compatibility with legacy Stellaris designs.
Technical Context
The LM3S2950-EQC50-A2 implements the ARMv7-M architecture with NVIC supporting 64 interrupt lines, SysTick timer, and MPU for memory protection. Its system-level peripherals include a hibernation module with dedicated 32.768 kHz RTC oscillator, battery-backed 2 KB RAM, and wake-up on external pin or RTC match.
It integrates a full CAN 2.0A/B controller with 32 message objects, programmable bit timing, and hardware acceptance filtering. Analog subsystem includes an 8-channel 10-bit ADC with sample rate up to 1 MSPS and four analog comparators with selectable reference sources.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 32-bit RISC, supports Thumb-2 instruction set for compact code and high efficiency |
| Max Clock Speed | 50 MHz - enables real-time control loops with sub-20 ns instruction cycle time |
| Flash / SRAM | 256 KB flash (in-system programmable) + 64 KB SRAM - sufficient for complex motor control firmware with safety stacks |
| CAN Interface | One CAN 2.0A/B controller with 32 message objects and hardware ID filtering - supports industrial fieldbus communication without external transceiver logic |
| Hibernate Current | 1.7 µA typical - allows multi-year battery operation in remote sensor nodes or maintenance-free controllers |
| ADC | 10-bit, 8-channel, 1 MSPS sampling - suitable for analog feedback acquisition in servo drives and power converters |
| Package | 100-pin LQFP (14 × 14 mm, 0.5 mm pitch) - standard footprint compatible with automated SMT assembly |
Pinout & Package
LM3S2950-EQC50-A2 is housed in a 100-pin Low-Profile Quad Flat Package (LQFP) with exposed thermal pad, JEDEC MS-026AC compliant. Pinout supports multiplexed GPIO, peripheral function assignment per port, and dedicated JTAG/SWD debug interface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD / VDDA / VDDC | Power supply inputs | Separate digital (VDD), analog (VDDA), and core (VDDC) rails enable noise isolation for ADC and PLL stability |
| PD0–PD7, PE0–PE5, PF0–PF4, etc. | GPIO ports with alternate functions | Each port supports configurable pull-up/down, slew rate, and drive strength; many pins support multiple peripheral mappings (e.g., UART0TX/RX, SSI0CLK/SSIClk) |
| PA0–PA7 | Analog input / ADC channel | Direct connection to 8-channel 10-bit ADC; PA0–PA3 also serve as comparator inputs |
| CAN0RX / CAN0TX | CAN physical layer interface | Dedicated differential pair for CAN bus signaling; requires external transceiver (e.g., SN65HVD230) for bus coupling |
| HIB, RTCOSC, HIBRST | Hibernation module control | HIB pin enables hibernate entry; RTCOSC accepts 32.768 kHz crystal; HIBRST provides reset during wake-up |
Key Features
| Feature | Design Value |
|---|---|
| Hibernation Module | Integrated RTC with calendar mode, 2 KB battery-backed SRAM, and 1.7 µA hibernate current - eliminates need for external RTC + backup RAM in portable equipment |
| CAN 2.0A/B Controller | 32 message objects, hardware acceptance filtering, and programmable bit timing - reduces CPU overhead in automotive diagnostics and industrial CANopen networks |
| Motor Control Peripherals | Four PWM generator blocks (each with two 16-bit timers), quadrature encoder input, and fault pin support - enables direct implementation of three-phase BLDC commutation without FPGA |
| Debug Interface | SWD/JTAG with 4-pin SWD support and serial wire trace - allows real-time debugging and profiling using TI's Code Composer Studio or third-party ARM tools |
| Analog Subsystem | 10-bit 8-channel ADC with hardware sequencer and four independent analog comparators - supports closed-loop voltage/current sensing and overvoltage protection in power supplies |
Applications
| Industrial Motor Drives | Building Automation Controllers |
|---|---|
Use Scenario: Closed-loop control of HVAC blowers and pump motors using field-oriented control (FOC) algorithms. IC Role / Device Role / Timing Role: Main system controller executing FOC math, PWM generation, ADC sampling, and CAN-based commissioning. Use Value: Integrated PWM modules with dead-time insertion and quadrature encoder input eliminate external gate drivers and counter ICs, reducing BOM count by ≥3 components. | Use Scenario: Distributed temperature, occupancy, and lighting control across multi-floor commercial buildings. IC Role / Device Role / Timing Role: Edge node processor managing local sensors, actuator drivers, and CAN/LON bus communication. Use Value: Hibernate current of 1.7 µA enables battery-powered operation for >5 years; integrated RTC ensures accurate scheduling of HVAC duty cycles without external timekeeping. |
| Remote Diagnostic Gateways | Programmable Logic Controllers (PLCs) |
Use Scenario: Field-deployed gateway collecting CAN data from agricultural machinery and forwarding via UART-to-LoRaWAN bridge. IC Role / Device Role / Timing Role: Protocol translator and CAN message aggregator with local storage in hibernate RAM. Use Value: Dual CAN controllers allow simultaneous connection to engine ECU and implement CAN FD-ready message buffering; hibernate RAM preserves last 100 fault logs during power loss. | Use Scenario: Compact modular PLC base unit handling I/O scanning, ladder logic execution, and Modbus RTU over RS-485. IC Role / Device Role / Timing Role: Real-time deterministic controller with interrupt latency <1 µs and cycle-accurate timer for scan timing. Use Value: 50 MHz Cortex-M3 core delivers 1.25 DMIPS/MHz performance - executes 1000-rung ladder logic in <2 ms scan time, meeting IEC 61131-3 cycle requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TM4C123GH6PM | Successor part: 80 MHz Cortex-M4F core, 256 KB flash, 32 KB SRAM, same 100-pin LQFP, adds FPU and enhanced PWM | Requires firmware recompilation; supports floating-point math for advanced motor control but lacks hibernation module | Select when higher compute throughput or DSP operations are needed; not drop-in due to hibernation removal and register map changes |
| STM32F103ZET6 | ARM Cortex-M3 at 72 MHz, 512 KB flash, 64 KB SRAM, 2× CAN, no hibernation module, 144-pin LQFP | Higher pin count and flash capacity; no integrated RTC battery backup or hibernate current spec below 5 µA | Choose for cost-sensitive industrial HMI or gateway designs where CAN redundancy matters more than ultra-low-power sleep |
Compared with TM4C123GH6PM and STM32F103ZET6, the LM3S2950-EQC50-A2 uniquely balances deterministic real-time control, industrial CAN connectivity, and sub-2 µA hibernation - making it optimal for battery-constrained edge nodes where firmware compatibility with legacy StellarisWare is required.
Availability
LM3S2950-EQC50-A2 is available at Aetrix Electronics and suitable for industrial motor drives, building automation controllers, remote diagnostic gateways, and compact PLCs requiring stable component supply and long-term lifecycle support.
Supply support for LM3S2950-EQC50-A2 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 leader focused on analog, embedded processing, and wireless technologies, serving industrial, automotive, and consumer markets since 1930.
The LM3S2950 belongs to the Stellaris® ARM® Cortex™-M3 microcontroller family, designed specifically for deterministic real-time control in resource-constrained industrial environments with integrated CAN, hibernation, and motor control peripherals.
FAQ
What is the maximum operating frequency of the LM3S2950-EQC50-A2?
The LM3S2950-EQC50-A2 operates at a maximum CPU clock frequency of 50 MHz. This speed is achieved using the internal PLL with a 1–25 MHz crystal or external clock source. At 50 MHz, the LM3S2950-EQC50-A2 delivers 1.25 DMIPS/MHz performance, enabling fast execution of real-time control algorithms such as PID loops and field-oriented motor control. The device maintains timing specifications across industrial temperature ranges (–40°C to +105°C).
Does the LM3S2950-EQC50-A2 include a hardware CAN controller?
Yes, the LM3S2950-EQC50-A2 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. The LM3S2950-EQC50-A2 does not include a physical CAN transceiver - an external transceiver (e.g., SN65HVD230) is required for bus coupling and level translation.
What is the hibernation current specification for the LM3S2950-EQC50-A2?
The LM3S2950-EQC50-A2 achieves a typical hibernation current of 1.7 µA when the hibernation module is active with RTC running and 2 KB of battery-backed SRAM retained. This value is measured at 3.3 V and 25°C with the internal 32.768 kHz oscillator enabled and all other peripherals disabled. The LM3S2950-EQC50-A2 supports wake-up via RTC alarm, external pin, or HIB interrupt, making it suitable for battery-powered remote sensors and maintenance-free controllers.
Which development tools support the LM3S2950-EQC50-A2?
The LM3S2950-EQC50-A2 is supported by Texas Instruments' StellarisWare Peripheral Driver Library, Code Composer Studio v5–6, and IAR Embedded Workbench for ARM. Hardware debug is enabled via SWD or JTAG using the LM Flash Programmer or third-party probes (e.g., Segger J-Link). The LM3S2950-EQC50-A2 is compatible with the original Stellaris DK-LM3S9B92 and EK-LM3S8962 evaluation kits, though newer TM4C-based boards require firmware adaptation.
Is the LM3S2950-EQC50-A2 pin-compatible with other Stellaris microcontrollers?
The LM3S2950-EQC50-A2 uses a 100-pin LQFP package identical in footprint and pinout to the LM3S811, LM3S8962, and LM3S9B92 within the same EQC50 speed grade. Signal mapping for GPIO, UART, SSI, I²C, and CAN is consistent across these parts, enabling hardware reuse. However, peripheral register addresses and interrupt vector assignments differ between families - firmware migration requires validation against the specific LM3S2950-EQC50-A2 datasheet and StellarisWare driver versions.
LM3S2950-EQC50-A2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 100-LQFP
- Series:
- Stellaris® ARM® Cortex®-M3S 2000
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M3
- Core Size:
- 32-Bit Single-Core
- Speed:
- 50MHz
- Connectivity:
- CANbus, I2C, IrDA, Microwire, QEI, SPI, SSI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O:
- 60
- Program Memory Size:
- 256KB (256K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 64K x 8
- Voltage - Supply (Vcc/Vdd):
- 2.25V ~ 2.75V
- Data Converters:
- -
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
LM3S2950-EQC50-A2 FAQ
1.How can I place an order for LM3S2950-EQC50-A2 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S2950-EQC50-A2 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 LM3S2950-EQC50-A2 reliable?
The price and inventory of LM3S2950-EQC50-A2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3S2950-EQC50-A2 is usually 5 days.
3.What payment methods are accepted for LM3S2950-EQC50-A2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S2950-EQC50-A2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S2950-EQC50-A2?
LM3S2950-EQC50-A2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S2950-EQC50-A2 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 LM3S2950-EQC50-A2?
For technical support, including LM3S2950-EQC50-A2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S2950-EQC50-A2 requirements.
6.How does Aetrix verify that LM3S2950-EQC50-A2 is sourced from the original manufacturer or authorized distributors?
All LM3S2950-EQC50-A2 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 LM3S2950-EQC50-A2 meets industry standards.
7.What is the process for return or replacement of LM3S2950-EQC50-A2?
All LM3S2950-EQC50-A2 units undergo pre-shipment inspection (PSI). If there is an issue with LM3S2950-EQC50-A2, 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 LM3S2950-EQC50-A2 part is unused and in its original packaging.
Return procedure for LM3S2950-EQC50-A2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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