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Texas Instruments LM3S6965-IQC50-A2
- Part No.:
- LM3S6965-IQC50-A2
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
LM3S6965-IQC50-A2.pdf
- Description:
- IC MCU 32BIT 256KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,005
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Product details
Overview
LM3S6965-IQC50-A2 from Texas Instruments is a 32-bit ARM Cortex-M3 microcontroller with 256 KB flash, 64 KB SRAM, integrated Ethernet MAC, dual UARTs, I²C, SSI, ADC (10-bit, 8-channel), and hibernation module. It operates at 50 MHz and supports industrial motor control and networked sensor nodes.
For engineers reviewing the LM3S6965-IQC50-A2 datasheet, LM3S6965-IQC50-A2 pinout, LM3S6965-IQC50-A2 application, or LM3S6965-IQC50-A2 equivalent, this page delivers verified package mapping (100-pin LQFP), confirmed peripheral set (Ethernet MAC + hibernation + RTC), and real-world selection guidance for embedded control with low-power networking.
Technical Context
The LM3S6965-IQC50-A2 implements the ARMv7-M architecture with NVIC, SysTick, and MPU-enabling deterministic interrupt latency and memory protection. Its integrated Ethernet MAC supports 10/100 Mbps MII interface without external PHY, and the hibernation module provides sub-1 µA sleep current with battery-backed RTC and 2 KB RAM retention.
Peripherals include two UARTs (one with IrDA/SIR), two SSI modules (SPI master/slave), one I²C controller (standard/fast mode), and an 8-channel 10-bit ADC with hardware averaging and temperature sensor. Clocking is managed via PLL, internal RC oscillator, and external crystal support up to 25 MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 32-bit RISC, 50 MHz max operation - enables real-time deterministic execution with Thumb-2 instruction set. |
| Memory | 256 KB on-chip flash + 64 KB SRAM - sufficient for standalone Ethernet-enabled firmware with protocol stack and application logic. |
| ADC | 10-bit, 8-channel SAR ADC with 1 MSPS sample rate and internal temperature sensor - supports analog monitoring in motor drives and environmental sensors. |
| Ethernet Interface | Integrated 10/100 Mbps MAC with MII pins - eliminates need for external MAC chip; requires external PHY for physical layer connection. |
| Hibernation Mode | Sub-1 µA current draw with RTC, 2 KB RAM retention, and wake-on-RTC/external-pin - enables battery-powered remote nodes with years of operation. |
| Package | 100-pin LQFP (14 × 14 mm, 0.5 mm pitch) - standard surface-mount footprint compatible with automated PCB assembly. |
| Operating Temp | –40°C to +85°C - qualified for industrial environments including factory automation and outdoor metering. |
Pinout & Package
LM3S6965-IQC50-A2 is housed in a 100-pin LQFP (Pb-free, RoHS-compliant) with exposed thermal pad. Pin functions are defined per TI SPMS144I datasheet Rev I (July 2014).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDC | Power supply inputs | Digital core (VDDC), analog (VDDA), and I/O (VDD) rails require separate 3.3 V regulation and local decoupling. |
| GND, GNDA, GNDC | Ground returns | Analog (GNDA), core (GNDC), and I/O (GND) grounds must be partitioned and joined at single point to minimize noise coupling. |
| PD0–PD7, PE0–PE5, PF0–PF4, etc. | GPIO banks | Multi-function pins supporting UART, SSI, I²C, PWM, and ADC input - configurable per peripheral enable and GPIOAFSEL register. |
| RMII/MII pins (TXD0–TXD1, RXD0–RXD3, TXEN, CRS_DV, etc.) | Ethernet MAC interface | Direct connection to external PHY; MII mode uses 16 signals, RMII reduces to 7 - layout requires controlled impedance and length matching. |
| HIB, RTCCLK, HIBRST | Hibernation control | HIB pin enables hibernate entry; RTCCLK accepts 32.768 kHz crystal; HIBRST provides reset during wake-up - critical for low-power sequencing. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Ethernet MAC | Reduces BOM count by eliminating discrete MAC IC; supports MII and RMII PHY interfaces with DMA-accelerated packet handling. |
| Hibernation Module | Enables ultra-low-power operation (<1 µA) with RTC alarm, external wake, and 2 KB battery-backed SRAM - ideal for battery-powered IoT edge nodes. |
| ARM Cortex-M3 Core | Delivers 1.25 DMIPS/MHz performance with NVIC, SysTick, and MPU - supports real-time OS, secure code isolation, and deterministic interrupt response. |
| Peripheral Integration | Includes dual UARTs (one with IrDA), two SSI, one I²C, 8-channel ADC, and PWM-capable timers - eliminates need for multiple external interface ICs. |
| Industrial Temperature Range | Rated for –40°C to +85°C operation with full specification compliance - suitable for deployment in uncontrolled enclosures and outdoor equipment. |
Applications
| Industrial Motor Control | Networked Sensor Node |
|---|---|
Use Scenario: Closed-loop control of BLDC motors in HVAC actuators with field-oriented control (FOC) algorithms and real-time feedback. IC Role / Device Role / Timing Role: Main controller executing FOC math, managing PWM generation, sampling current/voltage via ADC, and communicating status over UART/Ethernet. Use Value: Integrated 50 MHz Cortex-M3 core and 8-channel ADC enable precise timing-critical sampling and computation without external co-processors. | Use Scenario: Remote environmental monitoring node collecting temperature, humidity, and air quality data, then transmitting via Ethernet to central gateway. IC Role / Device Role / Timing Role: System-on-chip host managing sensor interfaces, data aggregation, TCP/IP stack, and Ethernet MAC transmission with RTC-scheduled reporting. Use Value: On-chip Ethernet MAC and hibernation module allow continuous low-power sensing with periodic wake-up and burst Ethernet transmission - extending battery life to multi-year operation. |
| Programmable Logic Controller (PLC) I/O Module | Building Automation Gateway |
Use Scenario: DIN-rail mounted I/O expansion module converting digital/analog field signals into Modbus TCP packets for SCADA integration. IC Role / Device Role / Timing Role: Protocol gateway translating Modbus RTU (via UART) to Modbus TCP (via Ethernet MAC), with isolated I/O conditioning and watchdog supervision. Use Value: Dual UARTs + Ethernet MAC + watchdog timer provide robust, deterministic communication bridging - no external protocol offload required. | Use Scenario: Central controller aggregating BACnet MS/TP, KNX, and DALI lighting data across building floors, then forwarding to cloud via Ethernet. IC Role / Device Role / Timing Role: Multi-protocol bridge with concurrent UART (BACnet), SSI (DALI), and Ethernet interfaces - synchronizing time-stamped events using integrated RTC. Use Value: Single-chip integration of multiple serial protocols and Ethernet reduces board space and inter-chip latency - simplifying certification for building management systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3S8962-IQC50-A2 | Same core, 512 KB flash, 64 KB SRAM, identical peripherals and pinout - differs only in flash size. | Supports larger firmware images (e.g., full TCP/IP stack + web server), but same real-time control capability. | Select when firmware exceeds 256 KB or future-proofing for feature expansion is required. |
| TM4C123GH6PM | Successor family: Cortex-M4F core, 80 MHz, FPU, 256 KB flash, same 100-pin LQFP package - not pin-compatible due to different pin assignments. | Enables floating-point math (e.g., FFT-based vibration analysis) and higher throughput, but requires PCB redesign. | Choose for new designs needing FPU, higher clock speed, or extended lifecycle - not a drop-in replacement. |
Compared with LM3S6965-IQC50-A2, LM3S8962-IQC50-A2 offers more flash without changing layout or firmware porting effort, while TM4C123GH6PM delivers architectural upgrades (M4F, FPU) at the cost of board-level redesign - making the former ideal for capacity scaling and the latter for next-generation performance.
Availability
LM3S6965-IQC50-A2 is available at Aetrix Electronics and suitable for industrial motor control, networked sensor nodes, PLC I/O modules, and building automation gateways requiring stable component supply and long-term production continuity.
Supply support for LM3S6965-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 leader delivering 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 MCU family for cost-sensitive, real-time embedded applications requiring integrated connectivity - especially Ethernet-enabled industrial control and sensor edge devices.
FAQ
What is the maximum operating frequency of the LM3S6965-IQC50-A2?
The LM3S6965-IQC50-A2 operates at a maximum system clock frequency of 50 MHz, derived from its internal PLL locked to an external crystal or oscillator. This frequency is specified across the full industrial temperature range (–40°C to +85°C) and supports deterministic real-time execution of control loops and protocol stacks. The LM3S6965-IQC50-A2 achieves 1.25 DMIPS/MHz at this speed.
Does the LM3S6965-IQC50-A2 include an integrated Ethernet PHY?
No, the LM3S6965-IQC50-A2 integrates only the Ethernet MAC layer - it does not include a physical layer (PHY). External PHY ICs (e.g., DP83848, LAN8720) must be used with MII or RMII interface signals routed from the LM3S6965-IQC50-A2. The device provides all MAC registers, DMA, and descriptor management required for full Ethernet functionality.
What power modes does the LM3S6965-IQC50-A2 support for low-energy operation?
The LM3S6965-IQC50-A2 supports Sleep, Deep-Sleep, and Hibernate modes. Hibernate mode draws less than 1 µA and retains RTC function, wake sources, and 2 KB of SRAM using a backup battery. Wake-up can occur via RTC alarm, external pin, or HIB signal. This makes the LM3S6965-IQC50-A2 suitable for battery-powered remote monitoring where multi-year operation is required.
Is the LM3S6965-IQC50-A2 pin-compatible with other Stellaris LM3S devices?
The LM3S6965-IQC50-A2 shares the same 100-pin LQFP package and pinout with LM3S618, LM3S6918, LM3S6965, and LM3S8962 variants - all use the SPMS144I mechanical and signal mapping. However, peripheral enablement and default functions may differ; always verify GPIOAFSEL and peripheral clock gating in software initialization for each specific part.
What development tools are officially supported for the LM3S6965-IQC50-A2?
Texas Instruments officially supports Keil MDK-ARM, IAR Embedded Workbench, and GCC-based toolchains (including Sourcery CodeBench) for the LM3S6965-IQC50-A2. TI's StellarisWare Peripheral Driver Library and evaluation kits like EK-LM3S6965 provide tested BSPs, example projects, and JTAG debugging via LM Flash Programmer. The LM3S6965-IQC50-A2 is fully supported in TI's legacy Code Composer Studio v5.x environment.
LM3S6965-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:
- 42
- 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 4x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
LM3S6965-IQC50-A2 FAQ
1.How can I place an order for LM3S6965-IQC50-A2 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S6965-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 LM3S6965-IQC50-A2 reliable?
The price and inventory of LM3S6965-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 LM3S6965-IQC50-A2 is usually 5 days.
3.What payment methods are accepted for LM3S6965-IQC50-A2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S6965-IQC50-A2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S6965-IQC50-A2?
LM3S6965-IQC50-A2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S6965-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 LM3S6965-IQC50-A2?
For technical support, including LM3S6965-IQC50-A2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S6965-IQC50-A2 requirements.
6.How does Aetrix verify that LM3S6965-IQC50-A2 is sourced from the original manufacturer or authorized distributors?
All LM3S6965-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 LM3S6965-IQC50-A2 meets industry standards.
7.What is the process for return or replacement of LM3S6965-IQC50-A2?
All LM3S6965-IQC50-A2 units undergo pre-shipment inspection (PSI). If there is an issue with LM3S6965-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 LM3S6965-IQC50-A2 part is unused and in its original packaging.
Return procedure for LM3S6965-IQC50-A2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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