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Texas Instruments LM3S2965-EQC50-A2T
- Part No.:
- LM3S2965-EQC50-A2T
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
LM3S2965-EQC50-A2T.pdf
- Description:
- IC MCU 32BIT 256KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LM3S2965-EQC50-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 (1 MSPS), and hibernation module supporting RTC and battery-backed memory. It operates at 50 MHz and targets industrial motor control and embedded automation systems requiring deterministic real-time response.
For engineers reviewing the LM3S2965-EQC50-A2T datasheet, LM3S2965-EQC50-A2T pinout, LM3S2965-EQC50-A2T application, or LM3S2965-EQC50-A2T equivalent, key selection criteria include its integrated CAN interface, hibernation power management, 50 MHz Cortex-M3 core, dual UARTs with IrDA support, and 12-bit ADC with hardware averaging - all in a 100-pin LQFP package.
Technical Context
The LM3S2965-EQC50-A2T implements the ARMv7-M architecture with NVIC, SysTick, and MPU for deterministic interrupt handling and memory protection. Its system-level peripherals include a hibernation module with RTC, battery-backed RAM, and wake-on-RTC/external-pin capability.
It integrates dual UARTs supporting IrDA SIR encoding, two SSI modules (SPI-compatible), an I²C master/slave interface, and a dedicated CAN 2.0A/B controller with 32 message objects and programmable FIFOs - enabling robust fieldbus communication without external transceivers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3 @ 50 MHz - delivers 38.3 DMIPS for real-time deterministic execution in motor control loops. |
| Flash Memory | 256 KB on-chip flash with 128-bit wide interface - supports in-application programming and secure code storage. |
| SRAM | 64 KB single-cycle SRAM - sufficient for real-time buffers, stack, and firmware data structures without external memory. |
| ADC | 12-bit, 1 MSPS SAR ADC with 8-channel analog input and hardware sample averaging - enables precise current/voltage sensing in motor drives. |
| CAN Interface | Dedicated CAN 2.0A/B controller with 32 message objects and configurable FIFOs - handles full CAN bus load without CPU overhead. |
| Hibernation Module | RTC + battery-backed 2 KB RAM + wake-on-RTC/external-pin - reduces system standby power to 1.7 µA typical. |
| Package | 100-pin LQFP (14 × 14 mm, 0.5 mm pitch) - compatible with standard industrial PCB assembly processes. |
Pinout & Package
LM3S2965-EQC50-A2T is housed in a 100-pin LQFP (Low-Profile Quad Flat Package) with 0.5 mm lead pitch and exposed thermal pad. Pin functions are defined per TI SPMS062I datasheet revision 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 CPU domains. |
| GND, GNDA, GNDC | Ground returns | Dedicated analog (GNDA) and core (GNDC) grounds minimize coupling between sensitive and switching circuits. |
| PA0–PA7, PB0–PB7, etc. | GPIO banks A–G | Multi-function pins support peripheral mapping (UART, SSI, I²C, PWM) with software-selectable drive strength and slew rate. |
| CAN0RX / CAN0TX | CAN physical layer interface | Dedicated differential-capable pins for CAN transceiver connection - no internal termination or level-shifting required. |
| HIBERNATE | Hibernation module control | Enables entry into ultra-low-power hibernate mode; asserts wake signal upon RTC match or external edge detection. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated CAN 2.0A/B Controller | Offloads CAN protocol handling from CPU via 32 message objects and hardware FIFOs - reduces ISR latency and improves bus throughput. |
| Hibernation Module with RTC | Enables sub-2 µA standby operation with timekeeping and 2 KB battery-backed RAM - eliminates need for external RTC or backup controller. |
| Dual UARTs with IrDA SIR Support | Supports infrared remote diagnostics and legacy serial communication without external encoder/decoder ICs. |
| 12-Bit ADC with Hardware Averaging | Reduces noise in motor current sensing by up to 4× effective resolution - avoids software filtering overhead and latency. |
| ARM Cortex-M3 with MPU | Provides memory protection for safety-critical tasks and prevents accidental overwrites of critical firmware or data regions. |
Applications
| Industrial Motor Control | Building Automation Gateway |
|---|---|
Use Scenario: Closed-loop control of 3-phase BLDC motors with current feedback, speed regulation, and fault monitoring. IC Role / Device Role / Timing Role: Real-time execution host for FOC algorithms, ADC sampling trigger, PWM generation, and CAN-based command/response messaging. Use Value: Integrated 50 MHz Cortex-M3, 12-bit ADC, and CAN controller eliminate external timing and interface ICs - reducing BOM count and board area. | Use Scenario: Protocol translation between BACnet MS/TP field devices and Ethernet/IP backbone in HVAC systems. IC Role / Device Role / Timing Role: Dual UARTs handle RS-485 BACnet traffic while Ethernet MAC (via external PHY) manages IP stack; CAN interfaces auxiliary sensors. Use Value: On-chip CAN and dual UARTs with IrDA support enable multi-protocol bridging without discrete transceivers - simplifying design and certification. |
| Energy Metering Terminal | Remote Industrial I/O Module |
Use Scenario: Tamper-resistant electricity meter with pulse counting, voltage/current measurement, and time-of-use logging. IC Role / Device Role / Timing Role: ADC acquisition engine, RTC time stamping, hibernation manager for low-power sleep cycles, and secure flash for tariff tables. Use Value: Battery-backed hibernation RAM retains metering logs during mains outage; 256 KB flash stores encryption keys and firmware updates securely. | Use Scenario: DIN-rail mounted I/O node collecting analog/digital sensor data and reporting via CANopen or Modbus RTU. IC Role / Device Role / Timing Role: Central controller managing GPIO expansion, ADC sampling, CAN message scheduling, and watchdog supervision. Use Value: 64 KB SRAM buffers burst sensor reads; hibernation mode extends battery life in solar-powered deployments beyond 5 years. |
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, enhanced ADC, and updated peripheral set. | Requires firmware update for FPU instructions and revised clock tree configuration; supports floating-point math in motor control. | Select when upgrading legacy LM3S designs for higher performance or floating-point capability - maintains PCB layout. |
| STM32F103VET6 | ARM Cortex-M3 at 72 MHz, 512 KB flash, 64 KB SRAM, but lacks native CAN FD and hibernation module with RTC/battery RAM. | Needs external RTC and CAN transceiver; suitable where cost sensitivity outweighs ultra-low-power requirements. | Select for cost-optimized industrial control where external RTC/CAN components are acceptable and higher clock speed is prioritized. |
Compared with LM3S2965-EQC50-A2T, TM4C123GH6PM offers higher clock speed and FPU for advanced motor algorithms but requires firmware adaptation, while STM32F103VET6 provides more flash and lower unit cost but increases BOM complexity due to missing hibernation and integrated CAN PHY interface.
Availability
LM3S2965-EQC50-A2T is available at Aetrix Electronics and suitable for industrial motor control, building automation gateways, energy metering terminals, and remote industrial I/O modules requiring stable component supply across extended product lifecycles.
Supply support for LM3S2965-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 company headquartered in Dallas, Texas, delivering analog, embedded processing, and wireless technologies for industrial, automotive, and consumer markets.
The Stellaris LM3S family was designed specifically for cost-sensitive, real-time embedded applications requiring integrated connectivity (CAN, UART, I²C), analog sensing, and ultra-low-power hibernation - targeting industrial automation and motor control.
FAQ
What is the maximum operating frequency of the LM3S2965-EQC50-A2T?
The LM3S2965-EQC50-A2T operates at a maximum system clock frequency of 50 MHz, derived from its internal PLL or external crystal oscillator. This frequency is specified under industrial temperature range (–40°C to +85°C) and 3.3 V supply conditions per the SPMS062I datasheet. The LM3S2965-EQC50-A2T achieves 38.3 DMIPS at this speed, enabling deterministic execution of real-time control tasks without overclocking.
Does the LM3S2965-EQC50-A2T include an integrated CAN transceiver?
No, the LM3S2965-EQC50-A2T includes only a CAN protocol controller (CAN 2.0A/B compliant), not a physical-layer transceiver. External CAN transceivers such as the SN65HVD230 must be used to interface with the CAN bus. The LM3S2965-EQC50-A2T provides CAN0RX and CAN0TX signals that connect directly to the transceiver's RXD and TXD pins per TI application note SPMA031.
What power modes does the LM3S2965-EQC50-A2T support?
The LM3S2965-EQC50-A2T supports Sleep, Deep-Sleep, and Hibernate modes. Hibernate mode draws as low as 1.7 µA and retains RTC operation and 2 KB of battery-backed RAM. Wake-up sources include RTC alarm, external GPIO edge, and HIBERNATE pin assertion. The LM3S2965-EQC50-A2T does not support Stop or Standby modes found in later Tiva C series parts.
Is the LM3S2965-EQC50-A2T pin-compatible with other Stellaris LM3S devices?
The LM3S2965-EQC50-A2T uses a 100-pin LQFP package shared with several LM3S devices (e.g., LM3S8962, LM3S9B92), but pin functions differ significantly across variants due to peripheral enablement and routing constraints. Direct replacement without firmware and schematic review is not supported. The LM3S2965-EQC50-A2T has unique hibernation and CAN signal assignments not mirrored in earlier LM3S families.
What development tools are officially supported for the LM3S2965-EQC50-A2T?
Texas Instruments officially supports the LM3S2965-EQC50-A2T with Keil MDK-ARM v4.x, IAR Embedded Workbench for ARM v6.x, and TI's Code Composer Studio v5.x (with Legacy Stellaris support). Debugging requires JTAG via XDS100v1/v2 or ICDI interface. The LM3S2965-EQC50-A2T is not supported in CCS v6+ or modern TI-RTOS versions - use TM4C equivalents for new designs.
LM3S2965-EQC50-A2T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 100-LQFP
- Series:
- Stellaris® ARM® Cortex®-M3S 2000
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Programmable:
- 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:
- 56
- 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:
LM3S2965-EQC50-A2T FAQ
1.How can I place an order for LM3S2965-EQC50-A2T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S2965-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 LM3S2965-EQC50-A2T reliable?
The price and inventory of LM3S2965-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 LM3S2965-EQC50-A2T is usually 5 days.
3.What payment methods are accepted for LM3S2965-EQC50-A2T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S2965-EQC50-A2T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S2965-EQC50-A2T?
LM3S2965-EQC50-A2T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S2965-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 LM3S2965-EQC50-A2T?
For technical support, including LM3S2965-EQC50-A2T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S2965-EQC50-A2T requirements.
6.How does Aetrix verify that LM3S2965-EQC50-A2T is sourced from the original manufacturer or authorized distributors?
All LM3S2965-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 LM3S2965-EQC50-A2T meets industry standards.
7.What is the process for return or replacement of LM3S2965-EQC50-A2T?
All LM3S2965-EQC50-A2T units undergo pre-shipment inspection (PSI). If there is an issue with LM3S2965-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 LM3S2965-EQC50-A2T part is unused and in its original packaging.
Return procedure for LM3S2965-EQC50-A2T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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