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Texas Instruments LM3S6965-IBZ50-A2T
- Part No.:
- LM3S6965-IBZ50-A2T
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 108-LFBGA
- Datasheet:
-
LM3S6965-IBZ50-A2T.pdf
- Description:
- IC MCU 32BIT 256KB FLASH 108BGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,637
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Product details
Overview
LM3S6965-IBZ50-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 temperature range (–40°C to +85°C) in a 100-pin LQFP package. Used in networked industrial controllers requiring real-time control and wired connectivity.
For engineers reviewing the LM3S6965-IBZ50-A2T datasheet, LM3S6965-IBZ50-A2T pinout, LM3S6965-IBZ50-A2T application, or LM3S6965-IBZ50-A2T equivalent, key selection criteria include Ethernet MAC integration, hibernation power management, 50 MHz clock speed, 100-pin LQFP footprint, and StellarisWare® software support for rapid firmware development.
Technical Context
The LM3S6965-IBZ50-A2T implements the ARM Cortex-M3 core with NVIC, SysTick, and MPU-enabling deterministic interrupt handling and memory protection. Its integrated 10/100 Ethernet MAC supports MII interface and IEEE 802.3 compliance without external PHY control logic.
Peripherals include a hibernation module with RTC, battery-backed RAM, and wake-on-RTC/external-pin capability; dual 16-bit GPTMs supporting PWM, input capture, and RTC modes; and an 8-channel 12-bit ADC with hardware averaging and temperature sensor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 32-bit RISC, supports Thumb-2 instruction set and hardware divide |
| Max Clock Speed | 50 MHz - determines real-time throughput for control loops and protocol stacks |
| Flash / SRAM | 256 KB flash / 64 KB SRAM - sufficient for standalone Ethernet-enabled firmware with TCP/IP stack |
| ADC | 8-channel, 12-bit SAR ADC with 1 MSPS sample rate and internal temperature sensor |
| Ethernet Interface | Integrated 10/100 MAC with MII support - eliminates need for external MAC controller in wired IoT nodes |
| Operating Temp | –40°C to +85°C - qualified for industrial automation and building control environments |
| Package | 100-pin LQFP (14 × 14 mm, 0.5 mm pitch) - compatible with standard PCB assembly and thermal management |
Pinout & Package
LM3S6965-IBZ50-A2T is housed in a 100-pin LQFP (Low-Profile Quad Flat Package) with exposed thermal pad, JEDEC MS-026AC compliant. Pinout validated per TI SPMS144I datasheet Rev I (July 2014).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD / VDDA / VDDC | Power supply inputs | Separate analog (VDDA), digital (VDD), and core (VDDC) rails enable noise isolation for ADC and CPU |
| PD0–PD7, PE0–PE5, PF0–PF4, PG0–PG7, PH0–PH7, PK0–PK7 | GPIO banks | Configurable as digital I/O, alternate function (UART/SSI/I²C), or analog input - supports peripheral multiplexing |
| RMII_TXD0 / RMII_TXD1 / RMII_TXEN / RMII_RXD0 / RMII_RXD1 / RMII_CRS_DV / RMII_REFCLK | Ethernet MII/RMII signals | Direct connection to external PHY without glue logic; REFCLK sourced internally or externally |
| HIB_RTCCLK / HIB_WAKE / HIB_NMI / HIB_DATA0–HIB_DATA3 | Hibernation module interface | Supports battery-backed RTC operation, wake-on-timer, and low-power state retention |
| USB0VBUS / USB0ID / USB0P / USB0N | USB device interface | Full-speed USB 2.0 device controller with integrated transceiver - no external PHY required |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Ethernet MAC | Reduces BOM count by eliminating discrete MAC IC; supports MII and RMII for flexible PHY selection |
| Hibernation Module | Enables sub-µA sleep current with RTC, battery-backed RAM, and wake-on-event - critical for energy-constrained edge nodes |
| StellarisWare® Peripheral Driver Library | Provides production-ready, tested C APIs for all on-chip peripherals - accelerates firmware bring-up and validation |
| Dual UART + I²C + SSI | Enables concurrent serial communication with sensors (I²C), displays (UART), and legacy fieldbus (SSI) in single-chip designs |
| Hardware CRC Generator | Offloads CRC-16/CRC-32 computation from CPU - improves data integrity checking performance in networking stacks |
Applications
| Industrial Ethernet Gateway | Building Automation Controller |
|---|---|
Use Scenario: Aggregating Modbus RTU sensor data over RS-485 and forwarding via Ethernet to SCADA systems. IC Role / Device Role / Timing Role: Central protocol translator and real-time scheduler executing dual-stack firmware (Modbus + TCP/IP). Use Value: Integrated Ethernet MAC and dual UARTs eliminate external bridge ICs; hibernation mode enables low-power standby during network idle periods. | Use Scenario: HVAC zone controller managing damper actuators, temperature sensors, and occupancy detectors across multiple floors. IC Role / Device Role / Timing Role: Real-time environmental regulator with deterministic 10-ms control loop timing and local data logging. Use Value: 12-bit ADC with hardware averaging ensures stable temperature readings; 64 KB SRAM accommodates PID tuning tables and event logs. |
| Networked Power Meter | Smart Lighting Node |
Use Scenario: DIN-rail mounted meter measuring voltage, current, and power factor via isolated analog front-end, reporting via Ethernet. IC Role / Device Role / Timing Role: Precision measurement engine with synchronized sampling and time-stamped Ethernet reporting. Use Value: Internal temperature sensor compensates ADC gain drift; hibernation RTC maintains accurate billing timestamps during brownouts. | Use Scenario: LED driver node receiving DALI or DMX commands and adjusting PWM dimming levels across multiple channels. IC Role / Device Role / Timing Role: Digital lighting controller with multi-channel PWM generation and fault monitoring. Use Value: Dual 16-bit GPTMs provide independent 8-channel PWM outputs; GPIOs support DALI half-duplex bus signaling without level shifters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3S8962-IQC50-A2T | Same core and peripherals but adds CAN controller and removes Ethernet MAC; 128 KB flash, 32 KB SRAM | Better suited for automotive body control or industrial CAN networks where Ethernet is unnecessary | Select when CAN bus integration is required and Ethernet is not needed - reduces cost and simplifies layout |
| TM4C123GH6PM | Successor family with same pinout, 80 MHz CPU, 256 KB flash, 32 KB SRAM, added USB OTG and enhanced PWM | Offers higher performance and extended lifecycle; requires minor firmware adaptation due to register map changes | Choose for new designs needing longer-term availability and improved processing headroom; not drop-in compatible |
Compared with LM3S6965-IBZ50-A2T, LM3S8962-IQC50-A2T trades Ethernet for CAN and reduced memory, while TM4C123GH6PM provides higher clock speed and updated peripherals but requires firmware migration - making LM3S6965-IBZ50-A2T optimal for legacy Ethernet-based industrial deployments.
Availability
LM3S6965-IBZ50-A2T is available at Aetrix Electronics and suitable for industrial Ethernet gateways, building automation controllers, and networked power meters requiring stable component supply and long-lifecycle support.
Supply support for LM3S6965-IBZ50-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 specializing in analog, embedded processing, and connectivity solutions, with decades of experience in industrial and automotive microcontrollers.
The Stellaris LM3S series was designed specifically for cost-sensitive, real-time industrial control applications requiring integrated connectivity - with LM3S6965-IBZ50-A2T targeting Ethernet-enabled edge devices needing deterministic response and low-power hibernation.
FAQ
What is the maximum operating frequency of the LM3S6965-IBZ50-A2T?
The LM3S6965-IBZ50-A2T operates at a maximum system clock frequency of 50 MHz, as specified in the production datasheet SPMS144I. This speed is achieved using the internal PLL with an external crystal or oscillator input. The LM3S6965-IBZ50-A2T's Cortex-M3 core delivers consistent real-time performance for control loops and protocol stacks at this frequency, with full peripheral timing compliance verified across the industrial temperature range.
Does the LM3S6965-IBZ50-A2T include an integrated Ethernet PHY?
No, the LM3S6965-IBZ50-A2T integrates only the Ethernet MAC layer, not the physical layer (PHY). It supports MII and RMII interfaces to connect to external 10/100 PHY chips such as the DP83848 or LAN8720. The LM3S6965-IBZ50-A2T provides all MAC registers, DMA control, and packet buffering - reducing system complexity compared to discrete MAC+PHY solutions, but still requires an external PHY for signal-level Ethernet transmission.
What debug interfaces does the LM3S6965-IBZ50-A2T support?
The LM3S6965-IBZ50-A2T supports JTAG and SWD (Serial Wire Debug) interfaces for programming and real-time debugging. Its integrated debug module includes breakpoints, watchpoints, and full NVIC visibility. The LM3S6965-IBZ50-A2T is fully compatible with TI's ICDI-based debuggers (e.g., Tiva C Series LaunchPad) and third-party tools like Segger J-Link, enabling source-level debugging and flash programming without requiring external debug silicon.
Is the LM3S6965-IBZ50-A2T pin-compatible with any newer TI microcontrollers?
The LM3S6965-IBZ50-A2T is not pin-compatible with newer TM4C123x devices despite shared package outlines - differences in pin function mapping (e.g., USB, hibernation, and Ethernet signals) prevent direct replacement. While TM4C123GH6PM uses the same 100-pin LQFP footprint, its pin assignments for RMII, USB, and clocking differ significantly. Migration from LM3S6965-IBZ50-A2T to TM4C123GH6PM requires PCB redesign and firmware adaptation.
What software development resources are available for the LM3S6965-IBZ50-A2T?
Texas Instruments provides the StellarisWare® Peripheral Driver Library, including full source code for all on-chip peripherals, example projects for Ethernet, USB, and hibernation use cases, and CMSIS-compliant startup files. The LM3S6965-IBZ50-A2T is supported by Keil MDK-ARM, IAR Embedded Workbench, and GCC-based toolchains. TI's official documentation, including SPMS144I datasheet and SW-TM4C-DRLIBUG user guide, remains publicly archived for continued LM3S6965-IBZ50-A2T development.
LM3S6965-IBZ50-A2T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 108-LFBGA
- Series:
- Stellaris® ARM® Cortex®-M3S 6000
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not 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 (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
LM3S6965-IBZ50-A2T FAQ
1.How can I place an order for LM3S6965-IBZ50-A2T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S6965-IBZ50-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-IBZ50-A2T reliable?
The price and inventory of LM3S6965-IBZ50-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-IBZ50-A2T is usually 5 days.
3.What payment methods are accepted for LM3S6965-IBZ50-A2T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S6965-IBZ50-A2T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S6965-IBZ50-A2T?
LM3S6965-IBZ50-A2T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S6965-IBZ50-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-IBZ50-A2T?
For technical support, including LM3S6965-IBZ50-A2T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S6965-IBZ50-A2T requirements.
6.How does Aetrix verify that LM3S6965-IBZ50-A2T is sourced from the original manufacturer or authorized distributors?
All LM3S6965-IBZ50-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-IBZ50-A2T meets industry standards.
7.What is the process for return or replacement of LM3S6965-IBZ50-A2T?
All LM3S6965-IBZ50-A2T units undergo pre-shipment inspection (PSI). If there is an issue with LM3S6965-IBZ50-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-IBZ50-A2T part is unused and in its original packaging.
Return procedure for LM3S6965-IBZ50-A2T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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