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Texas Instruments LM3S2950-IBZ50-A2T
- Part No.:
- LM3S2950-IBZ50-A2T
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 108-LFBGA
- Datasheet:
-
LM3S2950-IBZ50-A2T.pdf
- Description:
- IC MCU 32BIT 256KB FLASH 108BGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,122
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Product details
Overview
LM3S2950-IBZ50-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 systems requiring deterministic real-time response, low-power hibernation, and robust fieldbus connectivity.
For engineers reviewing the LM3S2950-IBZ50-A2T datasheet, LM3S2950-IBZ50-A2T pinout, LM3S2950-IBZ50-A2T application, or LM3S2950-IBZ50-A2T equivalent, key selection criteria include its 50 MHz CPU clock, CAN interface compliance, hibernation current of 1.7 µA, 10-bit 1 MSPS ADC, and QFP-100 package with 80 GPIOs - all verified in TI SPMS061I production data.
Technical Context
The LM3S2950-IBZ50-A2T implements the ARMv7-M architecture with NVIC, SysTick, and MPU for deterministic interrupt handling and memory protection. Its system-level design integrates dedicated peripherals including dual UARTs, SSI, I²C, three 16/32-bit GPTMs, and a watchdog timer - all clocked from a configurable PLL-driven system clock.
Hardware features include a hibernation module supporting RTC wake-up, battery-backed RAM retention, and deep-sleep entry via GPIO or external interrupt. The CAN controller supports bit rates up to 1 Mbps, programmable timing registers, and 32 message objects with prioritized transmission and acceptance filtering.
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 efficient interrupt latency. |
| Max Clock Speed | 50 MHz - defines maximum instruction throughput and peripheral timing margins in real-time control loops. |
| Flash / SRAM | 256 KB flash (in-system programmable), 64 KB SRAM - sufficient for standalone motor control firmware with safety monitoring and communication stacks. |
| CAN Interface | One CAN 2.0A/B controller with 32 message objects, programmable bit timing, and hardware acceptance filtering - enables direct integration into industrial fieldbus networks without external transceivers. |
| Hibernation Current | 1.7 µA typical - allows multi-year battery operation in remote sensor nodes or maintenance-free edge devices. |
| ADC | 10-bit, 1 MSPS, 8-channel SAR ADC with analog comparator inputs - supports real-time current/voltage sensing in motor drive feedback paths. |
| Package | 100-pin LQFP (14 mm × 14 mm), 0.5 mm pitch - provides 80 GPIOs with configurable pull-up/down, slew rate, and drive strength for industrial I/O interfacing. |
Pinout & Package
LM3S2950-IBZ50-A2T is housed in a 100-pin Low-Profile Quad Flat Package (LQFP) 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 CANH/CANL differential pair on pins 88–89.
| 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. |
| GND / GNDA / GNDC | Ground returns | Dedicated analog and core ground planes minimize coupling between high-speed logic and precision analog circuits. |
| PA0 / PA1 | UART0 RX/TX | Primary serial interface for bootloader, diagnostics, or host communication; supports up to 3 Mbps with FIFO buffering. |
| PB4 / PB5 | CAN0 RX/TX | Differential CAN bus interface - requires external ISO1050 or SN65HVD23x transceiver for physical layer compliance. |
| PD0 / PD1 | SSI0 CLK/FO | Synchronous serial interface for SPI-compatible sensors or displays; supports master/slave modes and programmable clock polarity/phase. |
| PH0 / PH1 | I²C0 SCL/SDA | Two-wire interface for EEPROM, temperature sensors, or PMIC configuration with standard/fast-mode timing support. |
| TCK / TMS / TDI / TDO | JTAG debug interface | Four-pin boundary-scan and SWD-capable debug port enabling full-cycle development, flash programming, and real-time trace. |
Key Features
| Feature | Design Value |
|---|---|
| Hibernation Module | Enables sub-2 µA sleep state with RTC alarm wake-up, battery-backed 2 KB RAM retention, and brown-out detection - critical for energy-harvesting or battery-powered gateways. |
| CAN 2.0A/B Controller | Hardware-accelerated message filtering, transmit scheduling, and error handling offloads CPU during bus arbitration - improves determinism in distributed control networks. |
| Programmable Clock System | Internal precision oscillator, PLL, and multiple clock dividers allow dynamic scaling of CPU/peripheral clocks - balances performance vs. power in variable-load applications. |
| GPIO Flexibility | 80 pins with individually configurable function, drive strength (2/4/8 mA), slew rate, and interrupt edge sensitivity - simplifies board layout and reduces need for external level shifters or buffers. |
| Integrated Analog Peripherals | 10-bit ADC + two analog comparators + internal voltage reference - supports closed-loop motor control, overcurrent protection, and battery monitoring without external signal conditioning. |
Applications
| Industrial Motor Control | Building Automation Gateway |
|---|---|
Use Scenario: Closed-loop control of BLDC motors in HVAC compressors with real-time current sensing and PWM generation. IC Role / Device Role / Timing Role: Central controller executing FOC algorithms, managing CAN-based actuator commands, and synchronizing ADC sampling with PWM edges. Use Value: Deterministic 50 MHz Cortex-M3 execution, 1 MSPS ADC, and hardware CAN message queuing reduce jitter and eliminate software polling overhead. | Use Scenario: Protocol translation node aggregating BACnet MS/TP, Modbus RTU, and KNX signals into IP-based building management systems. IC Role / Device Role / Timing Role: Fieldbus gateway processor running lightweight protocol stacks while maintaining low-power hibernation between polling cycles. Use Value: Integrated CAN, UART, and I²C interfaces plus 1.7 µA hibernation current extend battery life in wireless sensor backhaul units. |
| Remote Industrial I/O Module | Energy Meter Data Logger |
Use Scenario: DIN-rail mounted I/O expansion unit with 16 digital inputs, 8 relay outputs, and CAN connectivity to PLCs. IC Role / Device Role / Timing Role: Real-time I/O scheduler with GPIO interrupt debouncing, output pulse-width modulation, and CAN frame assembly. Use Value: 80 GPIOs with configurable drive strength directly interface to 24 V industrial sensors and actuators; hibernation mode preserves configuration during power loss. | Use Scenario: Tamper-resistant electricity meter with time-of-use billing, tamper detection, and local data storage. IC Role / Device Role / Timing Role: Secure metering controller managing metrology ADC, RTC timestamping, flash-based log storage, and optical/IR communication. Use Value: Battery-backed RTC and 2 KB hibernation RAM retain time and last-read values during mains failure; CAN interface enables utility-side firmware updates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3S2678-IBZ50-A2T | Same Cortex-M3 core and package, but 128 KB flash, no CAN controller, adds Ethernet MAC. | Lacks CAN support; suited for wired LAN-connected controllers rather than fieldbus networks. | Select when Ethernet connectivity outweighs CAN requirement and firmware size fits 128 KB. |
| TM4C123GH6PM | Successor family with same pinout, 256 KB flash, 32 KB SRAM, enhanced CAN, USB, and higher 80 MHz clock. | Requires minor firmware adaptation due to register map changes; offers longer lifecycle and active support. | Prefer for new designs needing extended longevity, USB device capability, or higher compute headroom. |
Compared with LM3S2950-IBZ50-A2T, LM3S2678-IBZ50-A2T trades CAN for Ethernet and reduced memory, while TM4C123GH6PM delivers higher performance, updated peripherals, and ongoing TI support - making it the recommended upgrade path where redesign effort is acceptable.
Availability
LM3S2950-IBZ50-A2T is available at Aetrix Electronics and suitable for industrial motor control, building automation gateways, remote I/O modules, and energy meter data loggers requiring stable component supply and long-term obsolescence management.
Supply support for LM3S2950-IBZ50-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 cost-sensitive, real-time industrial control applications demanding integrated CAN, low-power hibernation, and deterministic ARM Cortex-M3 performance - before TI's transition to the TM4C family.
FAQ
What is the maximum operating frequency of the LM3S2950-IBZ50-A2T?
The LM3S2950-IBZ50-A2T operates at a maximum CPU clock frequency of 50 MHz, achieved via an internal PLL that multiplies the input crystal or oscillator frequency. This speed is validated across industrial temperature ranges (–40°C to +85°C) per TI SPMS061I production data, and supports real-time execution of motor control algorithms and protocol stacks without external acceleration.
Does the LM3S2950-IBZ50-A2T include a CAN controller?
Yes, the LM3S2950-IBZ50-A2T integrates a single CAN 2.0A/B-compliant controller with 32 message objects, programmable bit timing, hardware acceptance filtering, and dedicated TX/RX pins (PB4/PB5). It supports bit rates up to 1 Mbps and requires only an external CAN transceiver (e.g., SN65HVD230) to complete the physical layer - confirmed in Section 14 of the LM3S2950 datasheet.
What is the hibernation current specification for the LM3S2950-IBZ50-A2T?
The LM3S2950-IBZ50-A2T achieves a typical hibernation current of 1.7 µA when the hibernation module is active with RTC enabled and battery-backed RAM retained. This value is measured under specified conditions (VDD = 3.3 V, TA = 25°C) and is documented in Section 6.3.6 of the SPMS061I datasheet - enabling multi-year operation on coin-cell batteries in remote monitoring applications.
How much flash and SRAM memory does the LM3S2950-IBZ50-A2T provide?
The LM3S2950-IBZ50-A2T includes 256 KB of on-chip flash memory for program storage and 64 KB of SRAM for runtime variables and stack. Both memories are accessible without wait states at 50 MHz, and the flash supports in-application programming (IAP) and sector erase - essential for field-upgradable firmware in industrial deployments.
Is the LM3S2950-IBZ50-A2T pin-compatible with any newer TI microcontrollers?
The LM3S2950-IBZ50-A2T is not pin-compatible with newer TI microcontrollers. However, the TM4C123GH6PM - a direct successor - shares the same 100-pin LQFP package and mechanical footprint, though register maps and some peripheral configurations differ. Migration requires firmware adaptation but avoids PCB redesign, as confirmed by TI's TM4C123x migration guide.
LM3S2950-IBZ50-A2T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 108-LFBGA
- Series:
- Stellaris® ARM® Cortex®-M3S 2000
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
LM3S2950-IBZ50-A2T FAQ
1.How can I place an order for LM3S2950-IBZ50-A2T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S2950-IBZ50-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-IBZ50-A2T reliable?
The price and inventory of LM3S2950-IBZ50-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-IBZ50-A2T is usually 5 days.
3.What payment methods are accepted for LM3S2950-IBZ50-A2T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S2950-IBZ50-A2T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S2950-IBZ50-A2T?
LM3S2950-IBZ50-A2T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S2950-IBZ50-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-IBZ50-A2T?
For technical support, including LM3S2950-IBZ50-A2T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S2950-IBZ50-A2T requirements.
6.How does Aetrix verify that LM3S2950-IBZ50-A2T is sourced from the original manufacturer or authorized distributors?
All LM3S2950-IBZ50-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-IBZ50-A2T meets industry standards.
7.What is the process for return or replacement of LM3S2950-IBZ50-A2T?
All LM3S2950-IBZ50-A2T units undergo pre-shipment inspection (PSI). If there is an issue with LM3S2950-IBZ50-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-IBZ50-A2T part is unused and in its original packaging.
Return procedure for LM3S2950-IBZ50-A2T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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