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Texas Instruments LM3S6950-IQC50-A2
- Part No.:
- LM3S6950-IQC50-A2
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
LM3S6950-IQC50-A2.pdf
- Description:
- IC MCU 32BIT 256KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,840
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Product details
Overview
LM3S6950-IQC50-A2 from Texas Instruments is a 32-bit ARM Cortex-M3 microcontroller with 256 KB flash, 64 KB SRAM, integrated Ethernet MAC, USB 2.0 device controller, 8-channel 10-bit ADC, and dual PWM modules. It operates at 50 MHz, supports hibernation mode with RTC and battery-backed memory, and targets industrial control and networked embedded systems.
For engineers reviewing the LM3S6950-IQC50-A2 datasheet, LM3S6950-IQC50-A2 pinout, LM3S6950-IQC50-A2 application, or LM3S6950-IQC50-A2 equivalent, key selection criteria include Ethernet PHY interface support, hibernation power management, USB device stack compatibility, and Cortex-M3 interrupt latency in real-time motor control loops.
Technical Context
The LM3S6950-IQC50-A2 implements the ARMv7-M architecture with NVIC supporting up to 64 interrupt lines, 8 priority levels, and tail-chaining for sub-12-cycle interrupt response. Its system clock is derived from an internal precision oscillator or external crystal (1–25 MHz), with PLL enabling 50 MHz core operation.
It integrates a full Ethernet MAC compliant with IEEE 802.3, supporting MII interface and 10/100 Mbps operation, alongside a USB 2.0 full-speed device controller with 512-byte endpoint FIFOs and built-in transceiver. The hibernation module provides RTC, battery-backed 2 KB SRAM, and wake-up on external signal or time match.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | ARM Cortex-M3, 32-bit RISC, 50 MHz max operation - enables deterministic real-time task scheduling and Thumb-2 instruction efficiency. |
| Memory | 256 KB on-chip flash + 64 KB SRAM - sufficient for standalone Ethernet/USB firmware with RTOS and protocol stacks. |
| ADC | 8-channel 10-bit SAR ADC, 1 MSPS sample rate - supports analog sensor acquisition in motor feedback or environmental monitoring. |
| Ethernet | IEEE 802.3-compliant MAC with MII interface - requires external PHY but eliminates need for external Ethernet controller IC. |
| USB | USB 2.0 full-speed device controller with integrated transceiver - enables direct connection to host PC without external PHY or level-shifting components. |
| Hibernate | Hibernation module with RTC, battery-backed 2 KB SRAM, and wake-on-time/external-pin - reduces system standby power to ~1.5 µA. |
| PWM | Dual 16-bit PWM generator with fault protection and dead-band insertion - suitable for three-phase motor drive timing control. |
Pinout & Package
LM3S6950-IQC50-A2 is housed in a 100-pin LQFP (14 mm × 14 mm, 0.5 mm pitch) package with exposed thermal pad. Pin functions are defined per TI SPMS142I datasheet Rev I (July 2014).
| 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. |
| PD0–PD7, PE0–PE5, PF0–PF4, PG0–PG7, PH0–PH7, PK0–PK7 | GPIO banks | Configurable 5-V-tolerant I/O with slew-rate control; multiple banks support remappable peripheral functions (UART, SSI, I²C, PWM). |
| PA0–PA7, PB0–PB7 | Ethernet MII interface | Dedicated 16-pin MII bus (TX/RX data, clocks, control) - requires external PHY and magnetics for 10/100BASE-TX. |
| USB0VBUS, USB0ID, USB0P, USB0N | USB physical layer | Integrated transceiver supports full-speed (12 Mbps) USB device mode; VBUS sensing enables host detection and power management. |
| HIB, RTCCLK, HIBRST | Hibernation control | Direct interface to hibernation module: RTC clock input, hibernate request, and reset output - enables ultra-low-power sleep states. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Ethernet MAC | Eliminates external MAC IC; supports MII interface and IEEE 802.3 frame filtering, checksum offload, and DMA-based packet buffering. |
| USB 2.0 Full-Speed Device | Built-in transceiver and endpoint FIFOs reduce BOM count; supports CDC, HID, and MSC class drivers without external PHY. |
| Hibernation Module | Enables <1.5 µA deep-sleep current with RTC, battery-backed RAM, and wake-on-event - critical for battery-powered remote nodes. |
| Dual PWM with Fault Protection | Two independent 16-bit PWM blocks with complementary outputs, dead-band generation, and external fault shutdown - suited for BLDC and stepper motor drives. |
| Programmable Interrupt Controller | NVIC with 64 interrupt sources, 8 priority levels, and automatic state preservation - ensures sub-12-cycle interrupt latency for time-critical control tasks. |
Applications
| Industrial Ethernet Node | USB Human Interface Device |
|---|---|
Use Scenario: Standalone PLC I/O module communicating over Modbus TCP on factory floor networks. IC Role / Device Role / Timing Role: Primary controller executing real-time I/O scan, Ethernet packet assembly, and CRC validation with deterministic 50 µs loop timing. Use Value: Integrated Ethernet MAC and 50 MHz Cortex-M3 eliminate external MAC and reduce latency vs. SPI-connected controllers. | Use Scenario: Programmable industrial keypad with LED feedback and host configuration via USB. IC Role / Device Role / Timing Role: USB device controller handling HID report transfers while managing local GPIO matrix scanning and PWM-driven LED dimming. Use Value: On-chip USB transceiver and dedicated endpoint FIFOs enable reliable 100 Hz polling without external PHY or timing margin concerns. |
| Remote Sensor Gateway | Motor Control Subsystem |
Use Scenario: Battery-powered environmental monitor aggregating temperature/humidity data and transmitting via Ethernet when mains power is available. IC Role / Device Role / Timing Role: System manager entering hibernation between readings; wakes on RTC alarm or external interrupt to sample sensors and transmit packets. Use Value: Hibernate current of 1.5 µA extends 2xAA battery life to >5 years in low-duty-cycle deployments. | Use Scenario: Closed-loop servo driver for HVAC damper actuator using hall-effect feedback and PWM-controlled H-bridge. IC Role / Device Role / Timing Role: Real-time PWM generator synchronizing gate drive signals with ADC sampling of current/voltage, enforced by hardware fault shutdown. Use Value: Dual PWM modules with dead-band and fault inputs prevent shoot-through in 24 V DC motor control without external logic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3S6965-IQC50-A2 | Same package and pinout; adds CAN 2.0B controller and removes one UART channel. | Preferred where CAN bus integration is required (e.g., automotive subsystems); unsuitable if dual UART is mandatory. | Select LM3S6965-IQC50-A2 only when CAN communication is essential and UART count can be reduced. |
| TM4C123GH6PM | Successor family with 80 MHz Cortex-M4F core, FPU, enhanced USB OTG, and larger memory (256 KB flash/32 KB SRAM); different pinout and voltage range (3.3 V only). | Supports floating-point math for advanced motor algorithms and USB host capability; requires PCB redesign. | Choose TM4C123GH6PM for new designs needing higher performance, FPU, or USB host - not a drop-in replacement. |
Compared with LM3S6950-IQC50-A2, LM3S6965-IQC50-A2 trades UART flexibility for CAN integration, while TM4C123GH6PM delivers higher compute throughput and FPU support at the cost of board-level incompatibility and increased power consumption.
Availability
LM3S6950-IQC50-A2 is available at Aetrix Electronics and suitable for industrial automation, networked sensor nodes, and USB peripheral designs requiring stable component supply, long-term lifecycle assurance, and legacy Stellaris software ecosystem compatibility.
Supply support for LM3S6950-IQC50-A2 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 connectivity solutions for industrial, automotive, and consumer markets.
The Stellaris LM3S series was designed as the first ARM Cortex-M3-based microcontroller family for cost-sensitive, real-time embedded applications requiring integrated connectivity - specifically targeting industrial control, building automation, and networked peripherals.
FAQ
What is the maximum operating frequency of the LM3S6950-IQC50-A2?
The LM3S6950-IQC50-A2 operates at a maximum core frequency of 50 MHz, achieved via its internal PLL locked to either the internal precision oscillator or an external crystal (1–25 MHz). This frequency is specified under industrial temperature range (–40°C to +85°C) and 3.3 V supply conditions per the SPMS142I datasheet.
Does the LM3S6950-IQC50-A2 include an integrated Ethernet PHY?
No, the LM3S6950-IQC50-A2 integrates only the Ethernet MAC layer compliant with IEEE 802.3. It requires an external PHY chip and Ethernet magnetics to implement a complete 10/100BASE-TX interface. The MII interface pins (PA0–PA7, PB0–PB7) are provided for direct connection to a compatible PHY.
What power modes does the LM3S6950-IQC50-A2 support for low-energy operation?
The LM3S6950-IQC50-A2 supports Sleep, Deep-Sleep, and Hibernate modes. Hibernate mode achieves ~1.5 µA typical current draw with RTC running and 2 KB of SRAM retained using an external backup battery. Wake-up sources include RTC match, external GPIO, and hibernate enable pin assertion.
Is the LM3S6950-IQC50-A2 pin-compatible with other LM3S devices?
The LM3S6950-IQC50-A2 shares the same 100-pin LQFP package and core peripheral mapping with LM3S6918, LM3S6965, and LM3S8962 variants. However, pin functions differ for specific peripherals (e.g., CAN vs. UART), so PCB layout must be verified against the exact variant's datasheet - it is not universally pin-compatible across all LM3S parts.
What development tools are officially supported for the LM3S6950-IQC50-A2?
Texas Instruments officially supports the LM3S6950-IQC50-A2 with Keil MDK-ARM, IAR Embedded Workbench for ARM, and TI's Code Composer Studio v5.x and earlier. StellarisWare Peripheral Driver Library and pre-certified Ethernet/USB stacks are provided, along with evaluation boards such as the EK-LM3S6965 and LM3S811 Evaluation Kits.
LM3S6950-IQC50-A2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 100-LQFP
- Series:
- Stellaris® ARM® Cortex®-M3S 6000
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Verified
- Core Processor:
- ARM® Cortex®-M3
- Core Size:
- 32-Bit Single-Core
- Speed:
- 50MHz
- Connectivity:
- Ethernet, I2C, IrDA, Microwire, QEI, SPI, SSI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O:
- 46
- 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:
LM3S6950-IQC50-A2 FAQ
1.How can I place an order for LM3S6950-IQC50-A2 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S6950-IQC50-A2 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 LM3S6950-IQC50-A2 reliable?
The price and inventory of LM3S6950-IQC50-A2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3S6950-IQC50-A2 is usually 5 days.
3.What payment methods are accepted for LM3S6950-IQC50-A2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S6950-IQC50-A2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S6950-IQC50-A2?
LM3S6950-IQC50-A2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S6950-IQC50-A2 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 LM3S6950-IQC50-A2?
For technical support, including LM3S6950-IQC50-A2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S6950-IQC50-A2 requirements.
6.How does Aetrix verify that LM3S6950-IQC50-A2 is sourced from the original manufacturer or authorized distributors?
All LM3S6950-IQC50-A2 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 LM3S6950-IQC50-A2 meets industry standards.
7.What is the process for return or replacement of LM3S6950-IQC50-A2?
All LM3S6950-IQC50-A2 units undergo pre-shipment inspection (PSI). If there is an issue with LM3S6950-IQC50-A2, 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 LM3S6950-IQC50-A2 part is unused and in its original packaging.
Return procedure for LM3S6950-IQC50-A2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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