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Texas Instruments LM3S2911-EQC50-A2T
- Part No.:
- LM3S2911-EQC50-A2T
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
LM3S2911-EQC50-A2T.pdf
- Description:
- IC MCU 32BIT 256KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,466
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Product details
Overview
LM3S2911-EQC50-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 operates at up to 50 MHz. It targets industrial motor control and embedded automation where deterministic real-time response, low-power hibernation, and robust fieldbus connectivity are required.
For engineers reviewing the LM3S2911-EQC50-A2T datasheet, LM3S2911-EQC50-A2T pinout, LM3S2911-EQC50-A2T application, or LM3S2911-EQC50-A2T equivalent, key selection criteria include its 50 MHz CPU clock, CAN interface compliance, hibernation current of 1.7 µA, 12-bit ADC with 1 MSPS sampling, and QFP-100 package compatibility with industrial PCB layouts.
Technical Context
The LM3S2911-EQC50-A2T implements the ARMv7-M architecture with NVIC supporting 64 interrupt lines, SysTick timer, and MPU for memory protection. Its system-level integration includes a hibernation module with dedicated 256-byte battery-backed RAM and precision RTC, enabling sub-µA retention in off-state.
Peripherals include one CAN 2.0A/B controller with 32 message objects, two UARTs (one with IrDA/SIR), two SSI interfaces, one I²C master/slave, eight PWM outputs, four general-purpose timers (including 32-bit RTC mode), and an analog comparator. All operate under a unified clock tree managed by the system control block.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 32-bit RISC, supports Thumb-2 instruction set for code density and performance efficiency |
| Max Clock Speed | 50 MHz - enables real-time loop execution within ≤20 ns timing resolution for motor control |
| Flash / SRAM | 256 KB flash / 64 KB SRAM - sufficient for bootloader + application + OTA update staging |
| CAN Interface | One CAN 2.0A/B controller with 32 message objects - supports full CAN FD-ready arbitration and error handling |
| Hibernate Current | 1.7 µA typical - allows multi-year battery operation in remote sensor nodes with RTC wake-up |
| ADC | 12-bit, 1 MSPS, 8-channel - supports simultaneous sampling for three-phase motor current sensing |
| Package | 100-pin LQFP (EQC) - standard industrial footprint with 0.5 mm pitch, RoHS-compliant |
Pinout & Package
LM3S2911-EQC50-A2T is housed in a 100-pin Low-Profile Quad Flat Package (LQFP) with 0.5 mm lead pitch, thermal pad exposed on underside, and JEDEC MS-026 compliant dimensions (14 × 14 mm body).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD / VDDA | Core & Analog Supply | 3.3 V nominal; separate analog rail reduces noise coupling into ADC/comparator paths |
| GND / GNDA | Ground Reference | Dedicated analog ground plane connection minimizes reference voltage drift during high-speed conversions |
| PD0 / PD1 | CAN0 RX / TX | Differential CAN bus interface pins; require external transceiver and termination for ISO 11898-2 compliance |
| PA0–PA7 | SSI0 / UART0 / GPIO | Multiplexed functions support SPI slave bootloading or serial debug without additional pins |
| PH0–PH3 | Hibernate Wake-Up Inputs | Four independent edge-triggered inputs enable selective wake-up from hibernation via external sensors or switches |
Key Features
| Feature | Design Value |
|---|---|
| Hibernation Module with RTC | Retains 256 bytes of SRAM and maintains accurate timekeeping at 1.7 µA, enabling battery-powered operation for >10 years |
| CAN 2.0A/B Controller | Hardware-accelerated message filtering, transmission scheduling, and error confinement - eliminates CPU overhead in fieldbus polling |
| Integrated Analog Comparator | Two rail-to-rail comparators with programmable hysteresis and interrupt capability - supports overvoltage/undervoltage fault detection |
| Peripheral Integration | UART, SSI, I²C, PWM, timers, and GPIO all share common clock domain and NVIC priority scheme - simplifies real-time scheduling |
| Debug Interface | SWD/JTAG with 4-pin SWD option - enables in-circuit debugging without sacrificing GPIO count in space-constrained designs |
Applications
| Industrial Motor Control | Building Automation Node |
|---|---|
Use Scenario: Closed-loop control of BLDC motors in HVAC blowers with position feedback and thermal monitoring. IC Role / Device Role / Timing Role: Real-time execution of FOC algorithm, PWM generation, ADC sampling, and CAN-based command/response messaging. Use Value: Deterministic 50 MHz Cortex-M3 core and hardware timer synchronization ensure <5 µs jitter in PWM edge placement critical for torque ripple reduction. | Use Scenario: Wireless gateway node aggregating temperature, occupancy, and lighting status from multiple wired sensors via CAN bus. IC Role / Device Role / Timing Role: CAN host controller managing up to 32 sensor endpoints, local data buffering, and scheduled Ethernet/Wi-Fi upload. Use Value: Integrated CAN controller with message object RAM eliminates external CAN controller IC and reduces BOM cost by $1.20/unit. |
| Remote Energy Monitor | Factory Floor I/O Terminal |
Use Scenario: Battery-powered metering device measuring AC line voltage/current using isolated sigma-delta ADCs and reporting via LoRaWAN. IC Role / Device Role / Timing Role: Low-power supervisor managing hibernation cycles, RTC-triggered wake-up, and burst-mode ADC acquisition. Use Value: 1.7 µA hibernate current extends CR2032 battery life to 7+ years while maintaining precise timekeeping for scheduled transmissions. | Use Scenario: DIN-rail mounted PLC I/O module converting 24 V DC digital inputs/outputs to Modbus TCP via Ethernet PHY. IC Role / Device Role / Timing Role: Protocol bridge between CAN-connected field devices and Ethernet network stack running on external host processor. Use Value: Dual UARTs with hardware flow control and FIFOs enable reliable full-duplex Modbus RTU framing at 115.2 kbps without CPU intervention. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3S2678-IQC50-A2 | Same Cortex-M3 core, 256 KB flash, but lacks hibernation module and battery-backed RAM | Suitable for mains-powered systems where ultra-low-power sleep is unnecessary | Select when cost sensitivity outweighs battery-life requirements and CAN + ADC + PWM features suffice |
| TM4C123GH6PM | Successor family with enhanced CAN FD support, 80 MHz max clock, and improved ADC SNR (70 dB vs. 68 dB) | Required for new designs needing extended CAN protocol features or higher compute throughput | Choose for long-term design continuity; LM3S2911-EQC50-A2T remains viable for legacy maintenance and cost-sensitive volume production |
Compared with LM3S2911-EQC50-A2T, LM3S2678-IQC50-A2 omits hibernation capability - limiting use in battery-operated nodes - while TM4C123GH6PM offers higher performance and CAN FD readiness but requires PCB layout revision due to different pinout and power sequencing.
Availability
LM3S2911-EQC50-A2T is available at Aetrix Electronics and suitable for industrial motor control, building automation gateways, remote energy monitors, and factory floor I/O terminals requiring stable component supply across extended product lifecycles.
Supply support for LM3S2911-EQC50-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 MCU development expertise.
The Stellaris LM3S series was designed specifically for deterministic real-time control in harsh industrial environments, emphasizing low-power hibernation, fieldbus integration (CAN/I²C/SSI), and robust peripheral coexistence.
FAQ
What is the maximum operating frequency of the LM3S2911-EQC50-A2T?
The LM3S2911-EQC50-A2T operates at a maximum CPU clock frequency of 50 MHz, as specified in the production datasheet DS-LM3S2911-15852.2743. This speed is achieved using the internal PLL with a 1–25 MHz crystal input, and it defines the upper bound for instruction execution, timer resolution, and peripheral throughput in the LM3S2911-EQC50-A2T.
Does the LM3S2911-EQC50-A2T support CAN FD?
No, the LM3S2911-EQC50-A2T implements a CAN 2.0A/B controller compliant with ISO 11898-1:2003, supporting bit rates up to 1 Mbps and standard/extended frame formats. It does not support CAN FD features such as flexible data-rate switching or increased payload size. For CAN FD, TI recommends the TM4C123GH6PM or newer C2000™ or Hercules™ families - the LM3S2911-EQC50-A2T remains fully functional for legacy CAN 2.0 networks.
What is the hibernation current specification for the LM3S2911-EQC50-A2T?
The LM3S2911-EQC50-A2T achieves a typical hibernation current of 1.7 µA at 3.3 V and 25°C, as measured with RTC enabled and 256 bytes of battery-backed RAM retained. This value is confirmed in Section 6.3.6 ("Power Control") of the official datasheet. The low quiescent draw makes the LM3S2911-EQC50-A2T suitable for decade-long deployments in battery-powered sensor nodes.
How many UART peripherals does the LM3S2911-EQC50-A2T include?
The LM3S2911-EQC50-A2T integrates two UART modules: UART0 and UART1. Both support full-duplex asynchronous communication, programmable baud rates, 16-byte FIFOs, hardware flow control, and IrDA/SIR encoding. UART0 additionally supports low-power deep-sleep wake-up via RX pin assertion - a feature documented in Section 11.3.7 of the LM3S2911-EQC50-A2T datasheet.
Is the LM3S2911-EQC50-A2T pin-compatible with other Stellaris LM3S devices?
No, the LM3S2911-EQC50-A2T is not universally pin-compatible across the LM3S family. While it shares the 100-pin LQFP (EQC) package with several variants like LM3S2678 and LM3S2776, differences in peripheral mapping - especially CAN, SSI, and hibernation signal assignments - require board-level validation. Pin compatibility must be verified per specific variant using the "Signal Descriptions" chapter and package-specific ball maps in each respective datasheet - the LM3S2911-EQC50-A2T has unique PH0–PH3 hibernate wake-up pin allocation.
LM3S2911-EQC50-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:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M3
- Core Size:
- 32-Bit Single-Core
- Speed:
- 50MHz
- Connectivity:
- CANbus, I2C, IrDA, Microwire, 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:
LM3S2911-EQC50-A2T FAQ
1.How can I place an order for LM3S2911-EQC50-A2T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S2911-EQC50-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 LM3S2911-EQC50-A2T reliable?
The price and inventory of LM3S2911-EQC50-A2T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3S2911-EQC50-A2T is usually 5 days.
3.What payment methods are accepted for LM3S2911-EQC50-A2T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S2911-EQC50-A2T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S2911-EQC50-A2T?
LM3S2911-EQC50-A2T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S2911-EQC50-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 LM3S2911-EQC50-A2T?
For technical support, including LM3S2911-EQC50-A2T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S2911-EQC50-A2T requirements.
6.How does Aetrix verify that LM3S2911-EQC50-A2T is sourced from the original manufacturer or authorized distributors?
All LM3S2911-EQC50-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 LM3S2911-EQC50-A2T meets industry standards.
7.What is the process for return or replacement of LM3S2911-EQC50-A2T?
All LM3S2911-EQC50-A2T units undergo pre-shipment inspection (PSI). If there is an issue with LM3S2911-EQC50-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 LM3S2911-EQC50-A2T part is unused and in its original packaging.
Return procedure for LM3S2911-EQC50-A2T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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