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Texas Instruments LM3S8971-IQC50-A2T
- Part No.:
- LM3S8971-IQC50-A2T
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
LM3S8971-IQC50-A2T.pdf
- Description:
- IC MCU 32BIT 256KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,162
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Product details
Overview
LM3S8971-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, 12-bit ADC (8-channel), and hibernation module for ultra-low-power operation. It operates at 50 MHz and supports industrial motor control, sensor nodes, and embedded automation systems requiring real-time deterministic response.
For engineers reviewing the LM3S8971-IQC50-A2T datasheet, LM3S8971-IQC50-A2T pinout, LM3S8971-IQC50-A2T application, or LM3S8971-IQC50-A2T equivalent, key selection criteria include its 50 MHz Cortex-M3 core, on-chip CAN interface, hibernation mode with RTC and battery-backed memory, and QFP-100 package compatibility with industrial temperature range (–40°C to +85°C).
Technical Context
The LM3S8971-IQC50-A2T implements the ARMv7-M architecture with NVIC, SysTick, and MPU for deterministic real-time execution. It integrates a dedicated CAN 2.0A/B controller with 32 message objects, hardware FIFOs, and bit timing configuration registers - enabling robust fieldbus communication without external transceivers.
Its analog subsystem includes an 8-channel, 12-bit ADC with sample sequencers and hardware averaging, while the hibernation module provides RTC, battery-backed SRAM (2 KB), and wake-up via GPIO, RTC match, or external interrupt - all operating from a 32.768 kHz crystal or internal oscillator during deep sleep.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 50 MHz max - delivers deterministic interrupt latency & Thumb-2 instruction efficiency for real-time control loops. |
| Flash / SRAM | 256 KB flash / 64 KB SRAM - sufficient for standalone firmware with CAN protocol stack and sensor processing routines. |
| CAN Interface | One CAN 2.0A/B controller with 32 message objects - supports full CAN FD-ready register layout and hardware acceptance filtering. |
| ADC | 12-bit, 8-channel SAR ADC with 1 MSPS sampling rate and hardware averaging - enables precision analog monitoring in motor current or temperature sensing. |
| Hibernation Mode | RTC + 2 KB battery-backed SRAM + wake-on-GPIO/RTC - reduces system power to ~1.5 µA, ideal for battery-powered remote nodes. |
| Package / Temp | 100-pin LQFP (14 × 14 mm), –40°C to +85°C - suitable for industrial PCB layouts with thermal and mechanical reliability requirements. |
| Peripherals | 2× UART, 2× SSI, 2× I²C, 4× GPTM, WDT, GPIO (up to 80 pins) - provides full connectivity for HMI, serial sensors, and actuator drivers. |
Pinout & Package
LM3S8971-IQC50-A2T is housed in a 100-pin Low-Profile Quad Flat Package (LQFP) with 0.5 mm pitch, JEDEC MO-152 compliant, and exposed thermal pad for enhanced heat dissipation in industrial environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD / VDDA | Core & Analog Power Supply | 3.3 V nominal supply; separate analog rail ensures ADC accuracy and noise immunity. |
| GND / GNDA | Ground Reference | Dedicated analog ground plane required to minimize coupling into sensitive ADC inputs. |
| PD0 / PD1 | CAN0 RX / TX | Direct connection to external CAN transceiver; no level-shifting needed for standard 3.3 V transceivers. |
| PC6 / PC7 | SSI0 CLK / FSS | Master clock and frame sync outputs for SPI-compatible peripherals like digital potentiometers or ADCs. |
| PE0 / PE1 | UART0 RX / TX | Asynchronous serial interface supporting up to 3 Mbps baud rate with programmable FIFO depth. |
| HIBRST | Hibernate Reset Input | Active-low signal that forces hibernation entry and resets hibernation logic - used for controlled low-power state transitions. |
Key Features
| Feature | Design Value |
|---|---|
| ARM Cortex-M3 Core | Single-cycle multiply, hardware divide, and nested vectored interrupt handling enable sub-1 µs ISR response for time-critical motor commutation. |
| Integrated CAN Controller | 32 configurable message objects with mask-based filtering eliminate software polling overhead and support multi-node diagnostics. |
| Hibernation Module | RTC with calendar mode, 2 KB battery-backed SRAM, and wake-up sources preserve context across power loss without external backup circuitry. |
| 12-bit ADC with Sequencing | Four independent sample sequencers allow concurrent triggering of multiple channels - essential for synchronized current/voltage sampling in three-phase inverters. |
| Peripheral Integration | Two UARTs, two SSI, two I²C, four general-purpose timers, and watchdog reduce BOM count and PCB footprint in compact embedded designs. |
Applications
| Industrial Motor Control | Building Automation Sensor Node |
|---|---|
Use Scenario: Closed-loop control of BLDC motors using space-vector PWM and real-time current feedback. IC Role / Device Role / Timing Role: Main controller executing FOC algorithm, managing CAN-based command interface, and sampling dual shunt currents via ADC sequencers. Use Value: Deterministic 50 MHz Cortex-M3 execution and hardware CAN message buffering ensure jitter-free torque control and synchronized node coordination. | Use Scenario: Wireless-ready environmental sensor hub collecting temperature, humidity, and occupancy data for HVAC optimization. IC Role / Device Role / Timing Role: Local intelligence node aggregating analog/digital sensor inputs, running lightweight scheduling logic, and transmitting over CAN to central controller. Use Value: Hibernation mode with RTC wake-up and battery-backed SRAM enables multi-year battery life while preserving last-read sensor values and timestamps. |
| Factory Floor PLC I/O Module | Energy Metering Gateway |
Use Scenario: DIN-rail mounted I/O expansion unit with discrete input monitoring and relay output control. IC Role / Device Role / Timing Role: Real-time digital input debouncing, pulse counting via GPTM edge-timing mode, and CAN-based status reporting to master PLC. Use Value: Dedicated 16-bit input edge timing and counting modes offload CPU from high-frequency signal analysis, improving system scalability. | Use Scenario: Substation-level metering gateway aggregating data from multiple smart meters via CAN bus. IC Role / Device Role / Timing Role: CAN protocol handler with message object prioritization, timestamped data logging to internal flash, and UART-based upstream telemetry. Use Value: Hardware CAN message filtering and 32-object RAM allocation prevent buffer overflow during burst traffic from distributed meters. |
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 pinout, 80 MHz Cortex-M4F core, FPU, and enhanced CAN features (CAN-FD readiness); requires updated toolchain and minor register mapping changes. | Supports floating-point math for advanced filtering and higher-speed CAN communication; not qualified for legacy qualification cycles requiring LM3S8971. | Select when new design allows migration path and needs improved performance or future-proofing beyond CAN 2.0B. |
| STM32F103VET6 | ARM Cortex-M3 at 72 MHz, 512 KB flash, 64 KB SRAM, but lacks native CAN 2.0B controller - requires external CAN transceiver and software stack for full protocol compliance. | Suitable for cost-sensitive applications where CAN is optional or implemented via external IC; lacks hibernation module and battery-backed memory. | Select when CAN usage is light-duty or secondary, and lower BOM cost outweighs integration benefits of LM3S8971-IQC50-A2T. |
Compared with TM4C123GH6PM and STM32F103VET6, the LM3S8971-IQC50-A2T offers best-in-class integration for CAN-centric industrial nodes with ultra-low-power hibernation - delivering deterministic real-time control without external timing or protocol assistance.
Availability
LM3S8971-IQC50-A2T is available at Aetrix Electronics and suitable for industrial motor control, building automation sensor nodes, factory floor PLC I/O modules, and energy metering gateways requiring stable component supply and long-term lifecycle support.
Supply support for LM3S8971-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 company headquartered in Dallas, Texas, specializing in analog, embedded processing, and wireless technologies with over 90 years of innovation in industrial and automotive electronics.
The Stellaris LM3S series was designed specifically for deterministic real-time embedded applications requiring integrated communication (CAN, UART, SSI), analog sensing (ADC), and ultra-low-power operation - targeting industrial automation, motor control, and sensor infrastructure.
FAQ
What is the maximum operating frequency of the LM3S8971-IQC50-A2T?
The LM3S8971-IQC50-A2T operates at a maximum system clock frequency of 50 MHz, derived from its internal PLL driven by an external crystal or oscillator. This frequency is specified under industrial temperature conditions (–40°C to +85°C) and 3.3 V supply, and enables deterministic execution of real-time control tasks including motor commutation and CAN message handling. The LM3S8971-IQC50-A2T maintains full peripheral functionality at this speed without throttling or timing violations.
Does the LM3S8971-IQC50-A2T include a built-in CAN transceiver?
No, the LM3S8971-IQC50-A2T integrates a CAN 2.0A/B protocol controller but requires an external CAN physical-layer transceiver (e.g., SN65HVD230) connected to its PD0 (RX) and PD1 (TX) pins. The LM3S8971-IQC50-A2T handles message arbitration, filtering, and framing in hardware, while the transceiver manages differential signaling and bus termination - a standard split between protocol and physical layer per ISO 11898.
What is the purpose of the hibernation module in the LM3S8971-IQC50-A2T?
The hibernation module in the LM3S8971-IQC50-A2T enables ultra-low-power operation with full state retention: it includes a real-time clock (RTC), 2 KB of battery-backed SRAM, and wake-up capability via GPIO, RTC alarm, or external interrupt. When activated, the LM3S8971-IQC50-A2T reduces current draw to approximately 1.5 µA while preserving critical variables and timestamps - making it ideal for battery-powered remote sensors or fail-safe monitoring nodes where continuous operation is not required.
How many ADC channels does the LM3S8971-IQC50-A2T support, and what is their resolution?
The LM3S8971-IQC50-A2T supports eight single-ended or four differential analog input channels with 12-bit resolution and a maximum sampling rate of 1 MSPS. Its ADC includes four independent sample sequencers, hardware averaging (up to 64 samples), and programmable trigger sources - allowing synchronized acquisition across multiple channels for applications such as three-phase current sensing or temperature profiling. All ADC functionality is fully operational within the LM3S8971-IQC50-A2T's specified voltage and temperature range.
Is the LM3S8971-IQC50-A2T pin-compatible with other Stellaris LM3S devices?
The LM3S8971-IQC50-A2T uses a 100-pin LQFP package shared with several other LM3S family members (e.g., LM3S811, LM3S8962), but pin functions are not universally identical across variants. While power, ground, and some peripheral pins align, specific allocations for CAN, SSI, or timer signals differ. Therefore, direct PCB reuse requires verification against each device's datasheet; the LM3S8971-IQC50-A2T must be treated as a distinct pinout configuration even within the same package outline.
LM3S8971-IQC50-A2T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 100-LQFP
- Series:
- Stellaris® ARM® Cortex®-M3S 8000
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Verified
- Core Processor:
- ARM® Cortex®-M3
- Core Size:
- 32-Bit Single-Core
- Speed:
- 50MHz
- Connectivity:
- CANbus, Ethernet, IrDA, Microwire, QEI, SPI, SSI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O:
- 38
- 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:
- A/D 8x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
LM3S8971-IQC50-A2T FAQ
1.How can I place an order for LM3S8971-IQC50-A2T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S8971-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 LM3S8971-IQC50-A2T reliable?
The price and inventory of LM3S8971-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 LM3S8971-IQC50-A2T is usually 5 days.
3.What payment methods are accepted for LM3S8971-IQC50-A2T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S8971-IQC50-A2T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S8971-IQC50-A2T?
LM3S8971-IQC50-A2T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S8971-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 LM3S8971-IQC50-A2T?
For technical support, including LM3S8971-IQC50-A2T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S8971-IQC50-A2T requirements.
6.How does Aetrix verify that LM3S8971-IQC50-A2T is sourced from the original manufacturer or authorized distributors?
All LM3S8971-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 LM3S8971-IQC50-A2T meets industry standards.
7.What is the process for return or replacement of LM3S8971-IQC50-A2T?
All LM3S8971-IQC50-A2T units undergo pre-shipment inspection (PSI). If there is an issue with LM3S8971-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 LM3S8971-IQC50-A2T part is unused and in its original packaging.
Return procedure for LM3S8971-IQC50-A2T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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