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Texas Instruments LM3S2950-EQC50-A2T
- Part No.:
- LM3S2950-EQC50-A2T
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
LM3S2950-EQC50-A2T.pdf
- Description:
- IC MCU 32BIT 256KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,937
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Product details
Overview
LM3S2950-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 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-A2T datasheet, LM3S2950-EQC50-A2T pinout, LM3S2950-EQC50-A2T application, or LM3S2950-EQC50-A2T equivalent, key selection criteria include its 50 MHz CPU clock, CAN interface compliance, hibernation current (≤1.8 µA), 12-bit ADC (up to 1 MSPS), and QFP-100 package compatibility with industrial temperature range (–40°C to +105°C).
Technical Context
The LM3S2950-EQC50-A2T implements the ARMv7-M architecture with NVIC supporting up to 64 interrupt lines, SysTick timer, and MPU for memory protection. Its system-level design integrates dedicated peripherals for motor control-including PWM-capable timers and analog comparators-alongside robust communication interfaces.
It features a hibernation module with independent 32.768 kHz RTC oscillator, battery-backed 2 KB SRAM, and wake-up capability via external pins or RTC match. The CAN module supports bit rates up to 1 Mbps and conforms to ISO 11898-1 with programmable timing registers and message object FIFOs.
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 - enables real-time control loops with sub-20 µs instruction cycle time |
| Flash / SRAM | 256 KB flash (in-system programmable) + 64 KB SRAM - sufficient for complex motor firmware and data buffers |
| CAN Interface | One CAN 2.0A/B controller with 32 message objects - supports automotive and industrial fieldbus integration |
| Hibernate Current | ≤1.8 µA at 3.3 V - enables multi-year battery operation in remote sensor nodes |
| ADC | 12-bit, 8-channel, up to 1 MSPS - suitable for precision current/voltage sensing in motor drives |
| Operating Temp | –40°C to +105°C - qualified for under-hood and factory-floor environments |
Pinout & Package
LM3S2950-EQC50-A2T is housed in a 100-pin LQFP (Low-Profile Quad Flat Package) with 0.5 mm pitch, JEDEC MS-026AC compliant, and thermal pad exposed on underside for enhanced heat dissipation in high-duty-cycle applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD / VDDA | Core & Analog Power Supply | 3.0–3.6 V supply inputs; separate analog rail reduces noise coupling into ADC/comparators |
| GND / GNDA | Ground Reference | Dedicated analog ground plane improves signal integrity for precision analog functions |
| PA0–PA7 | GPIO / UART0 / SSI0 | Multi-function port A pins support UART0 TX/RX, SSI0 clock/data, or general I/O with slew-rate control |
| PD0–PD7 | GPIO / CAN0 / Timer | Port D includes CAN0 TX/RX (PD0/PD1), plus 16-bit timer capture/compare (PD2–PD3) |
| HIBERNATE | Hibernate Control Input | Active-low signal enabling ultra-low-power hibernation mode with RTC and backup RAM retention |
| RTCCLK | Real-Time Clock Input | Accepts external 32.768 kHz crystal or clock source for hibernation-mode timekeeping |
Key Features
| Feature | Design Value |
|---|---|
| Hibernation Module | Retains RTC, 2 KB SRAM, and wake-up state at ≤1.8 µA - eliminates need for external RTC + backup battery |
| CAN 2.0B Controller | 32 configurable message objects with mask-based filtering - supports distributed control networks without host CPU overhead |
| Motor Control Timers | Four 16-bit timers with PWM, input capture, and quadrature encoder interface - directly drive gate drivers or monitor position feedback |
| Analog Subsystem | 12-bit ADC (8 ch, 1 MSPS) + two analog comparators with internal reference - enables closed-loop current regulation and overcurrent shutdown |
| Debug Interface | SWD/JTAG with TPIU trace output - allows real-time instruction tracing and non-intrusive debugging in live motor control systems |
Applications
| Industrial Motor Drives | Building Automation Controllers |
|---|---|
Use Scenario: Variable-frequency drives for HVAC blowers and pumps requiring precise speed/torque control and fault logging. IC Role / Device Role / Timing Role: Main system controller executing FOC algorithms, managing CAN-based supervisory commands, and sampling current sensors via ADC. Use Value: Integrated hibernation extends uptime during brownouts; CAN interface enables interoperability with BACnet/IP gateways via CAN-to-Ethernet bridges. | Use Scenario: Distributed HVAC zone controllers with local temperature sensing, damper actuation, and networked status reporting. IC Role / Device Role / Timing Role: Real-time coordinator of sensor reads, PID loop execution, and CAN bus communication with central building management system. Use Value: 105°C rating ensures reliability inside electrical enclosures; battery-backed RTC maintains schedule integrity during AC power loss. |
| Factory Floor PLC I/O Modules | Energy Monitoring Gateways |
Use Scenario: DIN-rail mounted digital I/O expansion modules interfacing with legacy 24 V DC sensors and actuators. IC Role / Device Role / Timing Role: Isolation-aware peripheral manager handling opto-coupled inputs, relay drivers, and CAN diagnostics reporting. Use Value: GPIOs support programmable slew rate and pull-up/down for noise immunity on long industrial wiring runs. | Use Scenario: Smart metering gateways aggregating data from Modbus RTU meters and transmitting via cellular or Ethernet. IC Role / Device Role / Timing Role: Protocol translation hub running CAN, UART, and SSI simultaneously while maintaining secure firmware updates over TLS. Use Value: Dual-bank flash enables safe over-the-air updates without runtime interruption; hibernation mode conserves power during cellular idle periods. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3S8962-IQC50-A2T | Same core, 256 KB flash, but adds Ethernet MAC + PHY and removes CAN controller | Better suited for wired IP-connected devices; lacks native CAN for fieldbus integration | Select when Ethernet connectivity outweighs CAN requirement and PCB layout accommodates larger PHY footprint |
| TM4C123GH6PGE | Successor family with same pinout, 256 KB flash, 32 KB SRAM, added USB OTG and enhanced CAN FD support | Supports modern CAN FD networks and USB device/host modes; requires updated BSP and toolchain | Preferred for new designs needing future-proofing; LM3S2950-EQC50-A2T remains valid for legacy CAN-only deployments |
Compared with LM3S2950-EQC50-A2T, LM3S8962-IQC50-A2T trades CAN for Ethernet, limiting fieldbus use but enabling direct TCP/IP stack deployment; TM4C123GH6PGE retains CAN compatibility while adding USB and CAN FD, offering upgrade path without board redesign.
Availability
LM3S2950-EQC50-A2T is available at Aetrix Electronics and suitable for industrial motor drives, building automation controllers, and factory floor PLC I/O modules requiring stable component supply across extended production lifecycles.
Supply support for LM3S2950-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 delivering analog, embedded processing, and wireless technologies with focus on industrial, automotive, and personal electronics markets.
The Stellaris LM3S series was designed as the first ARM Cortex-M3-based MCU family for cost-sensitive, real-time industrial applications-emphasizing integrated peripherals, low-power hibernation, and CAN-ready connectivity without external support chips.
FAQ
What is the maximum operating frequency of the LM3S2950-EQC50-A2T?
The LM3S2950-EQC50-A2T operates at a maximum CPU clock frequency of 50 MHz. This speed is achieved using an internal PLL driven by the main oscillator or an external crystal, and it is fully supported across the full industrial temperature range (–40°C to +105°C). The LM3S2950-EQC50-A2T delivers consistent performance for time-critical motor control loops and real-time communications without derating.
Does the LM3S2950-EQC50-A2T support CAN FD?
No, the LM3S2950-EQC50-A2T implements a classical CAN 2.0A/B controller compliant with ISO 11898-1, supporting bit rates up to 1 Mbps but not CAN FD features such as flexible data-rate or extended payload. For CAN FD support, TI's TM4C123GH6PGE offers pin-compatible migration with identical package and enhanced protocol capability. The LM3S2950-EQC50-A2T remains appropriate for established CAN 2.0 networks.
What is the hibernation current consumption of the LM3S2950-EQC50-A2T?
The LM3S2950-EQC50-A2T achieves ≤1.8 µA typical hibernation current at 3.3 V with RTC running and 2 KB of SRAM retained. This specification is measured under defined conditions per the official datasheet (SPMS061I, Section 6.3.6) and enables multi-year operation on coin-cell batteries in remote monitoring nodes. The LM3S2950-EQC50-A2T maintains full RTC accuracy and wake-up capability without external components.
Is the LM3S2950-EQC50-A2T pin-compatible with other Stellaris LM3S devices?
The LM3S2950-EQC50-A2T uses a 100-pin LQFP package shared with several LM3S variants (e.g., LM3S8962, LM3S9B92), but pin functions differ significantly across models due to peripheral allocation. While physical footprint matches, signal mapping for CAN, Ethernet, USB, or SSI varies. Therefore, the LM3S2950-EQC50-A2T is not drop-in compatible with other LM3S parts - schematic and layout review is required before substitution.
What debug interface does the LM3S2950-EQC50-A2T support?
The LM3S2950-EQC50-A2T supports both JTAG and Serial Wire Debug (SWD) interfaces, with full access to Cortex-M3 debug features including breakpoints, watchpoints, and real-time trace via the TPIU. TI's Stellaris ICDI and third-party tools like Segger J-Link are compatible. The LM3S2950-EQC50-A2T also supports in-application programming (IAP) through its boot loader, enabling field firmware updates without debug hardware.
LM3S2950-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, 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-A2T FAQ
1.How can I place an order for LM3S2950-EQC50-A2T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S2950-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 LM3S2950-EQC50-A2T reliable?
The price and inventory of LM3S2950-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 LM3S2950-EQC50-A2T is usually 5 days.
3.What payment methods are accepted for LM3S2950-EQC50-A2T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S2950-EQC50-A2T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S2950-EQC50-A2T?
LM3S2950-EQC50-A2T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S2950-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 LM3S2950-EQC50-A2T?
For technical support, including LM3S2950-EQC50-A2T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S2950-EQC50-A2T requirements.
6.How does Aetrix verify that LM3S2950-EQC50-A2T is sourced from the original manufacturer or authorized distributors?
All LM3S2950-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 LM3S2950-EQC50-A2T meets industry standards.
7.What is the process for return or replacement of LM3S2950-EQC50-A2T?
All LM3S2950-EQC50-A2T units undergo pre-shipment inspection (PSI). If there is an issue with LM3S2950-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 LM3S2950-EQC50-A2T part is unused and in its original packaging.
Return procedure for LM3S2950-EQC50-A2T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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