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Texas Instruments LM3S6965-EQC50-A2T
- Part No.:
- LM3S6965-EQC50-A2T
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
LM3S6965-EQC50-A2T.pdf
- Description:
- IC MCU 32BIT 256KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,932
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Product details
Overview
LM3S6965-EQC50-A2T 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 (8-channel, 12-bit), and hibernation module. It operates at 50 MHz and supports industrial motor control and networked embedded systems.
For engineers reviewing the LM3S6965-EQC50-A2T datasheet, LM3S6965-EQC50-A2T pinout, LM3S6965-EQC50-A2T application, or LM3S6965-EQC50-A2T equivalent, key selection criteria include Ethernet MAC integration, hibernation power management, 50 MHz Cortex-M3 performance, and industrial temperature-grade operation (–40°C to +105°C).
Technical Context
The LM3S6965-EQC50-A2T implements a full-featured ARM Cortex-M3 core with NVIC, SysTick, MPU, and debug support via JTAG/SWD. It integrates a hardware-accelerated Ethernet MAC (10/100 Mbps) compliant with IEEE 802.3, eliminating need for external PHY interface logic in basic configurations.
Its analog subsystem includes an 8-channel, 12-bit ADC with hardware averaging and internal temperature sensor; digital peripherals include two UARTs (one with IrDA/SIR), two SSI modules, one I²C master/slave, four 32-bit GPTMs, and a watchdog timer - all clocked from a configurable PLL-based system clock up to 50 MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 50 MHz max - delivers deterministic real-time interrupt response and Thumb-2 instruction efficiency for compact firmware. |
| Memory | 256 KB flash + 64 KB SRAM - sufficient for standalone Ethernet-enabled firmware with protocol stacks and application logic. |
| ADC | 8-channel, 12-bit, 1 MSPS - supports simultaneous sampling of motor current/voltage feedback and thermal monitoring. |
| Ethernet | Integrated 10/100 Mbps MAC - enables direct connection to external PHY without glue logic; no external MAC required. |
| Temperature Range | –40°C to +105°C - qualified for extended industrial environments including motor drives and factory automation. |
| Hibernation Module | Battery-backed RTC + 2 KB hibernate RAM - retains state and time during deep sleep with <1 µA current draw. |
| Package | 100-pin LQFP (14 × 14 mm, 0.5 mm pitch) - standard surface-mount footprint compatible with automated assembly. |
Pinout & Package
LM3S6965-EQC50-A2T is housed in a 100-pin LQFP package (JEDEC MO-152AC) with exposed thermal pad. Pin functions are multiplexed across GPIO banks A–G, supporting flexible peripheral routing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDC | Power supply inputs | Digital (3.3 V), analog (3.3 V), and core (1.2 V) supplies - require separate decoupling per datasheet layout guidelines. |
| PD0–PD7, PE0–PE5, PF0–PF4, PG0–PG7 | GPIO bank pins | Configurable as digital I/O, UART/SSI/I²C signals, or timer capture/compare - enable mixed-signal peripheral mapping. |
| EMAC0_RX, EMAC0_TX | Ethernet MAC interface | Dedicated RMII/MII pins - connect directly to external PHY (e.g., DP83848) without level-shifting or buffering. |
| USB0_VBUS, USB0_ID, USB0_DM, USB0_DP | USB device interface | Full-speed (12 Mbps) USB 2.0 device controller - supports HID, CDC, or custom class implementations. |
| JTAG_TCK, TMS, TDI, TDO, nTRST | JTAG debug interface | Standard 5-pin boundary-scan and SWD-capable debug port - supports TI's Code Composer Studio and third-party debuggers. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Ethernet MAC | Reduces BOM count by eliminating external MAC IC; simplifies PCB layout for industrial Ethernet nodes. |
| Hibernation Module with RTC | Enables ultra-low-power wake-up from battery backup (<1 µA), preserving timekeeping and critical state across power cycles. |
| Hardware CRC Generator | Offloads CRC-16/CRC-32 computation from CPU - accelerates firmware update validation and communication integrity checks. |
| Dual UART with IrDA/SIR | Supports legacy serial diagnostics and infrared remote interfaces without external transceivers. |
| Programmable GPIO Interrupts | Per-pin edge-selectable interrupts on all GPIO banks - enables responsive event-driven I/O for sensors and switches. |
Applications
| Industrial Motor Control | Building Automation Gateway |
|---|---|
Use Scenario: Closed-loop control of BLDC/PMSM motors with current sensing, PWM generation, and thermal monitoring. IC Role / Device Role / Timing Role: Real-time controller executing FOC algorithms, managing ADC sampling, and driving gate drivers via PWM outputs. Use Value: Integrated 50 MHz Cortex-M3, 12-bit ADC, and four 32-bit timers provide deterministic timing for 20 kHz PWM and sub-microsecond interrupt latency. | Use Scenario: Protocol translation between BACnet MS/TP, Modbus RTU, and Ethernet/IP in HVAC controllers. IC Role / Device Role / Timing Role: Network bridge processor handling serial-to-Ethernet packet conversion and local device management. Use Value: On-chip Ethernet MAC and dual UARTs enable concurrent serial fieldbus and IP network connectivity without external interface ICs. |
| Smart Energy Metering | Remote Industrial I/O Node |
Use Scenario: ANSI C12.22-compliant meter with voltage/current measurement, tamper detection, and secure data upload. IC Role / Device Role / Timing Role: Secure data acquisition and encrypted Ethernet transmission controller with RTC timestamping. Use Value: Internal temperature sensor, hibernation RTC, and hardware CRC support metrology accuracy, time-stamped logging, and firmware integrity verification. | Use Scenario: DIN-rail mounted I/O module collecting analog/digital sensor data and reporting over industrial Ethernet. IC Role / Device Role / Timing Role: Field-side data concentrator with isolated analog input conditioning and deterministic Ethernet packet scheduling. Use Value: 8-channel ADC with hardware averaging reduces noise in 4–20 mA loop readings; hibernation mode extends battery life in solar-powered deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TM4C123GH6PM | Successor part with enhanced peripherals (USB OTG, CAN, higher ADC resolution), same 100-pin LQFP package, 80 MHz Cortex-M4F core. | Supports CAN bus and floating-point math; better suited for advanced motor control or USB host applications. | Select TM4C123GH6PM when upgrading legacy LM3S designs requiring CAN, USB host, or DSP-enhanced processing. |
| STM32F407VGT6 | ARM Cortex-M4F at 168 MHz, 1 MB flash, no integrated Ethernet MAC - requires external PHY and MAC logic or uses external SPI Ethernet chip. | Lacks native Ethernet MAC; adds FPU and DSP instructions but increases BOM and layout complexity for Ethernet use cases. | Choose STM32F407VGT6 only if FPU, larger memory, or ecosystem preference outweighs loss of integrated MAC and increased design effort. |
Compared with TM4C123GH6PM and STM32F407VGT6, the LM3S6965-EQC50-A2T offers unique value in cost-sensitive, Ethernet-centric industrial designs where integrated MAC, hibernation, and proven qualification at 105°C reduce system-level complexity and qualification risk.
Availability
LM3S6965-EQC50-A2T is available at Aetrix Electronics and suitable for industrial motor control, building automation gateways, smart energy metering, and remote industrial I/O nodes requiring stable component supply and long-term lifecycle assurance.
Supply support for LM3S6965-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 family was designed specifically for cost-effective, high-integration industrial microcontroller applications - emphasizing Ethernet connectivity, low-power hibernation, and robust peripheral sets for real-time control.
FAQ
What is the maximum operating frequency of the LM3S6965-EQC50-A2T?
The LM3S6965-EQC50-A2T operates at a maximum system clock frequency of 50 MHz, derived from its internal PLL with crystal or external clock input. This frequency is specified across the full industrial temperature range (–40°C to +105°C) and supports deterministic real-time execution of control loops and protocol stacks in the LM3S6965-EQC50-A2T.
Does the LM3S6965-EQC50-A2T include an integrated Ethernet PHY?
No, the LM3S6965-EQC50-A2T includes only an Ethernet MAC compliant with IEEE 802.3. An external PHY (e.g., DP83848 or LAN8720) is required for physical layer signaling. The LM3S6965-EQC50-A2T provides RMII/MII interface pins and supports both modes, enabling flexible PHY selection while reducing system-level component count compared to solutions requiring discrete MAC+PHY.
What is the purpose of the hibernation module in the LM3S6965-EQC50-A2T?
The hibernation module in the LM3S6965-EQC50-A2T provides ultra-low-power retention of RTC time, 2 KB of RAM, and wake-up capability using battery backup. It draws less than 1 µA in hibernate mode and supports wake-up via external pin, RTC alarm, or GPIO event - making the LM3S6965-EQC50-A2T suitable for battery-operated or energy-harvesting industrial nodes where power cycling must preserve state and time.
Is the LM3S6965-EQC50-A2T pin-compatible with other Stellaris LM3S devices?
No, the LM3S6965-EQC50-A2T is not universally pin-compatible with other LM3S devices. While it shares the 100-pin LQFP package with some variants (e.g., LM3S8962), peripheral pin mappings, power pin arrangements, and reset configuration differ. Designers must verify pinout compatibility using the LM3S6965-EQC50-A2T-specific datasheet and cannot assume drop-in replacement across the LM3S family.
What debug interfaces does the LM3S6965-EQC50-A2T support?
The LM3S6965-EQC50-A2T supports JTAG and SWD (Serial Wire Debug) via dedicated pins (TCK, TMS, TDI, TDO, nTRST). It is fully compatible with TI's XDS100v3/XDS200 debug probes and third-party tools like Segger J-Link. Debug features include halt-mode debugging, real-time watchpoints, and memory access - all accessible through standard IDEs targeting the LM3S6965-EQC50-A2T.
LM3S6965-EQC50-A2T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 100-LQFP
- Series:
- Stellaris® ARM® Cortex®-M3S 6000
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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 ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
LM3S6965-EQC50-A2T FAQ
1.How can I place an order for LM3S6965-EQC50-A2T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S6965-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 LM3S6965-EQC50-A2T reliable?
The price and inventory of LM3S6965-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 LM3S6965-EQC50-A2T is usually 5 days.
3.What payment methods are accepted for LM3S6965-EQC50-A2T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S6965-EQC50-A2T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S6965-EQC50-A2T?
LM3S6965-EQC50-A2T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S6965-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 LM3S6965-EQC50-A2T?
For technical support, including LM3S6965-EQC50-A2T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S6965-EQC50-A2T requirements.
6.How does Aetrix verify that LM3S6965-EQC50-A2T is sourced from the original manufacturer or authorized distributors?
All LM3S6965-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 LM3S6965-EQC50-A2T meets industry standards.
7.What is the process for return or replacement of LM3S6965-EQC50-A2T?
All LM3S6965-EQC50-A2T units undergo pre-shipment inspection (PSI). If there is an issue with LM3S6965-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 LM3S6965-EQC50-A2T part is unused and in its original packaging.
Return procedure for LM3S6965-EQC50-A2T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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