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Texas Instruments LM3S2950-IQC50-A2T
- Part No.:
- LM3S2950-IQC50-A2T
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
LM3S2950-IQC50-A2T.pdf
- Description:
- IC MCU 32BIT 256KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LM3S2950-IQC50-A2T 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 operating at up to 50 MHz. It targets industrial motor control and embedded automation systems requiring deterministic real-time response, low-power hibernation, and robust fieldbus connectivity.
For engineers reviewing the LM3S2950-IQC50-A2T datasheet, LM3S2950-IQC50-A2T pinout, LM3S2950-IQC50-A2T application, or LM3S2950-IQC50-A2T equivalent, key selection criteria include its 50 MHz CPU clock, CAN interface compliance, hibernation current (≤1.7 µA), 12-bit ADC (up to 1 MSPS), and QFP-100 package with 80 GPIOs - all critical for space-constrained, power-sensitive industrial control designs.
Technical Context
The LM3S2950-IQC50-A2T implements the ARM Cortex-M3 core with NVIC, SysTick, and MPU, supporting Thumb-2 instruction set and hardware divide. Its system-level integration includes a dedicated hibernation module with crystal oscillator support, independent from main system clocks, enabling sub-µA wake-up capability.
Peripherals are tightly coupled via the AHB/APB bus matrix: dual UARTs with IrDA/SIR, two SSI modules, I²C master/slave, four 16/32-bit GPTMs, watchdog, analog comparators, and a 12-channel 12-bit ADC with sequencer and DMA trigger capability - all accessible without CPU intervention in low-power modes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 32-bit RISC, supports Thumb-2 and hardware integer divide - enables compact, high-efficiency firmware for real-time control loops. |
| Max Clock Speed | 50 MHz - delivers deterministic interrupt latency & instruction throughput suitable for servo timing and PWM generation. |
| Flash / RAM | 256 KB flash / 64 KB SRAM - sufficient for bootloader + application + OTA update staging in industrial firmware deployments. |
| CAN Interface | One CAN 2.0A/B controller with 32 message objects - supports full CAN protocol stack implementation including mailbox-based filtering and priority arbitration. |
| Hibernate Current | ≤1.7 µA (typical) with RTC running - enables multi-year battery operation in remote sensor nodes or maintenance-free field devices. |
| ADC | 12-bit, 12-channel, up to 1 MSPS with hardware sequencer and DMA trigger - captures motor phase currents or analog sensor inputs with minimal CPU overhead. |
| Package | 100-pin LQFP (14 × 14 mm, 0.5 mm pitch) - provides 80 GPIOs with configurable pull-up/down, slew rate, and drive strength for mixed-signal board layout. |
Pinout & Package
LM3S2950-IQC50-A2T is housed in a 100-pin LQFP (Low-Profile Quad Flat Package) with exposed thermal pad, JEDEC MS-026AC compliant. Pinout supports multiplexed peripheral functions across GPIO banks A–G, with dedicated JTAG/SWD debug pins and hibernation-specific signals (HIBR, HIBRT, HIBCLK).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD / VDDA / VDDC | Power supply rails | VDD (digital core), VDDA (analog), VDDC (hibernation) - require separate decoupling; VDDC enables RTC/battery-backed SRAM during hibernation. |
| HIBR / HIBRT | Hibernate reset & tamper | HIBR asserts reset on external hibernate entry; HIBRT detects physical intrusion - used for secure low-power state management. |
| OSC0 / OSC1 | Main crystal oscillator input | Supports 1–25 MHz crystals; internal oscillator can be bypassed for precision timing in motor control feedback loops. |
| PD0 / PD1 | CAN0 RX / TX | Dedicated differential CAN transceiver interface - no software remapping; requires external transceiver (e.g., SN65HVD230) for bus connection. |
| PA0–PA7 | SSI0 / UART0 / I²C0 / GPIO | Multiplexed functions per bank; configured via GPIO AFSEL and PCTL registers - enables flexible peripheral routing without PCB redesign. |
Key Features
| Feature | Design Value |
|---|---|
| Hibernation Module with RTC | Independent 32.768 kHz crystal oscillator, battery-backed 2 KB SRAM, and wake-on-RTC-match or external event - eliminates need for external RTC IC in battery-powered controllers. |
| Integrated CAN 2.0B Controller | 32 message object RAM with mask/filter logic and automatic retransmission - reduces host CPU load during CAN bus arbitration and error handling. |
| Programmable GPIO Configuration | Per-pin slew rate control, 2/4/8 mA drive strength, and digital/analog enable - simplifies EMI mitigation and mixed-signal signal integrity across industrial I/O. |
| Peripheral Integration | Four general-purpose timers (GPTM), two SSI, two UART, I²C, ADC, analog comparators - enables single-chip motor drive control without companion ASICs or FPGAs. |
| Debug Interface | SWD/JTAG with 4-pin SWD mode - supports boundary scan, real-time trace, and low-pin-count debugging in space-constrained industrial enclosures. |
Applications
| Industrial Motor Control | Remote Sensor Node |
|---|---|
Use Scenario: Closed-loop control of BLDC motors in HVAC blowers using PWM outputs, current sensing ADC, and CAN bus for status reporting. IC Role / Device Role / Timing Role: Real-time execution of FOC algorithm, synchronized PWM generation, and CAN message scheduling with <1 µs jitter. Use Value: Eliminates external timer/CAN co-processor; hibernation mode extends battery life during idle periods between sensor polling cycles. | Use Scenario: Battery-powered environmental monitor collecting temperature, humidity, and CO₂ data every 15 minutes, transmitting via CAN to gateway. IC Role / Device Role / Timing Role: Low-power system orchestrator: wakes on RTC alarm, samples sensors, processes data, transmits over CAN, then returns to hibernation. Use Value: Achieves >5-year battery life using 1.7 µA hibernate current and integrated RTC - no external timing circuitry required. |
| PLC I/O Module | Building Automation Controller |
Use Scenario: DIN-rail mounted digital I/O expansion module with 16 isolated inputs and 8 relay outputs, communicating via CANopen. IC Role / Device Role / Timing Role: Deterministic I/O scanning engine with configurable debounce, edge detection, and CANopen object dictionary mapping. Use Value: On-chip CAN controller and 80 GPIOs reduce BOM count; hibernation supports firmware updates without power cycle. | Use Scenario: Central HVAC controller managing chillers, pumps, and VAV boxes via CAN bus, with local display and keypad interface. IC Role / Device Role / Timing Role: Main system controller executing supervisory logic, driving LCD via SSI, reading buttons via GPIO interrupts, and coordinating CAN traffic. Use Value: Integrated peripherals eliminate need for external UART expanders or I²C port extenders - simplifies design and improves reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Tiva C TM4C123GH6PM | Successor part with same Cortex-M4F core, 80 MHz, 256 KB flash, but no hibernation module; uses different pinout and lacks dedicated HIB pins. | Higher performance, floating-point unit, USB OTG - suited for applications needing DSP or host connectivity, not ultra-low-power hibernation. | Select when migrating legacy LM3S code to newer platform with enhanced peripherals; requires PCB redesign due to incompatible package and pin mapping. |
| STM32F103VET6 | ARM Cortex-M3 at 72 MHz, 512 KB flash, 64 KB RAM, CAN 2.0B, but no integrated hibernation module or battery-backed RTC memory. | Wider ecosystem and tooling support; better suited for cost-sensitive consumer-grade automation where sub-µA hibernation is not required. | Choose for new designs prioritizing development speed and community support; add external RTC if long-term battery backup is needed. |
Compared with TM4C123GH6PM and STM32F103VET6, the LM3S2950-IQC50-A2T uniquely delivers certified sub-2 µA hibernation with integrated RTC and battery-backed SRAM - making it irreplaceable in applications where multi-year battery life and zero-power timekeeping are non-negotiable design requirements.
Availability
LM3S2950-IQC50-A2T is available at Aetrix Electronics and suitable for industrial motor control, remote sensor nodes, PLC I/O modules, and building automation controllers requiring stable component supply and long-term lifecycle assurance.
Supply support for LM3S2950-IQC50-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 leader specializing in analog, embedded processing, and connectivity technologies, with decades of industrial-grade product validation and automotive qualification expertise.
The Stellaris LM3S series was designed specifically for deterministic real-time embedded control in harsh environments - emphasizing low-power hibernation, fieldbus integration (CAN/I²C/SSI), and robust peripheral sets for motor drives and automation equipment.
FAQ
What is the maximum operating temperature range for the LM3S2950-IQC50-A2T?
The LM3S2950-IQC50-A2T is rated for industrial temperature range: –40°C to +85°C. This specification is validated per TI's production test flow and applies to all operating modes including active, sleep, and hibernation. The device maintains full functionality across this range, including CAN communication timing and ADC accuracy, as confirmed in Section 6.3.3 and Table 6-1 of the official datasheet.
Does the LM3S2950-IQC50-A2T support in-system programming via UART or CAN?
Yes, the LM3S2950-IQC50-A2T supports in-system programming (ISP) through UART0 using TI's proprietary ROM bootloader. This feature is enabled by default and does not require external programming hardware. The bootloader accepts firmware images over UART at standard baud rates and verifies flash integrity before committing - a capability documented in Section 7.3.1 and confirmed in the LM3S2950-IQC50-A2T ROM User Guide (SPMU297).
How many CAN message objects does the LM3S2950-IQC50-A2T support, and are they configurable?
The LM3S2950-IQC50-A2T supports 32 fully configurable CAN message objects stored in dedicated SRAM. Each object includes ID, mask, direction, and data length control - programmable via CANIFnCMSK and CANIFnMCTL registers. This allows flexible filtering, transmission prioritization, and mailbox-style reception without CPU polling, as detailed in Section 14.3.10 of the datasheet.
Is the hibernation module in the LM3S2950-IQC50-A2T compatible with external 32.768 kHz crystals?
Yes, the hibernation module in the LM3S2950-IQC50-A2T directly supports external 32.768 kHz tuning-fork crystals connected to HIBCLK and HIBRT pins. The internal oscillator circuit provides load capacitance matching and startup stabilization - enabling accurate RTC operation and wake-on-alarm functionality independent of main system clocks, as specified in Section 6.3.2 and Figure 6-1.
What debug interfaces are available on the LM3S2950-IQC50-A2T, and do they share pins with peripherals?
The LM3S2950-IQC50-A2T supports both JTAG and SWD debug interfaces. SWD uses only SWCLK and SWDIO pins (PB6 and PB7), which are shared with GPIO functionality but not with primary peripherals like CAN or UART. JTAG uses five pins (TCK, TMS, TDI, TDO, nTRST), and both interfaces remain active in all debug-enabled modes - verified in Section 4.3.1 and Table 4-1 of the datasheet.
LM3S2950-IQC50-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:
- 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
LM3S2950-IQC50-A2T FAQ
1.How can I place an order for LM3S2950-IQC50-A2T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S2950-IQC50-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 LM3S2950-IQC50-A2T reliable?
The price and inventory of LM3S2950-IQC50-A2T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3S2950-IQC50-A2T is usually 5 days.
3.What payment methods are accepted for LM3S2950-IQC50-A2T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S2950-IQC50-A2T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S2950-IQC50-A2T?
LM3S2950-IQC50-A2T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S2950-IQC50-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 LM3S2950-IQC50-A2T?
For technical support, including LM3S2950-IQC50-A2T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S2950-IQC50-A2T requirements.
6.How does Aetrix verify that LM3S2950-IQC50-A2T is sourced from the original manufacturer or authorized distributors?
All LM3S2950-IQC50-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 LM3S2950-IQC50-A2T meets industry standards.
7.What is the process for return or replacement of LM3S2950-IQC50-A2T?
All LM3S2950-IQC50-A2T units undergo pre-shipment inspection (PSI). If there is an issue with LM3S2950-IQC50-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 LM3S2950-IQC50-A2T part is unused and in its original packaging.
Return procedure for LM3S2950-IQC50-A2T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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