Texas Instruments LM3S2965-IBZ50-A2

Overview

LM3S2965-IBZ50-A2 from Texas Instruments is a 32-bit ARM Cortex-M3 microcontroller with 256 KB flash, 64 KB SRAM, integrated CAN 2.0B 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-IBZ50-A2 datasheet, LM3S2965-IBZ50-A2 pinout, LM3S2965-IBZ50-A2 application, or LM3S2965-IBZ50-A2 equivalent, key selection criteria include CAN interface support, hibernation power management, 50 MHz clock speed, 12-bit ADC sampling rate, and LQFP-100 package compatibility.

Technical Context

The LM3S2965-IBZ50-A2 implements the ARM Cortex-M3 core with NVIC, SysTick, and MPU for deterministic interrupt handling and memory protection. It integrates dual UARTs, two SSI modules, I²C, and a dedicated CAN 2.0B controller with 32 message objects and programmable FIFO buffering.

Its analog subsystem includes an 8-channel 12-bit ADC with hardware averaging and internal temperature sensor, while the hibernation module provides RTC, battery-backed RAM (2 KB), and wake-up on external event or time match - all operating down to 1.65 V supply.

Key Specifications

Pinout & Package

LQFP-100 (14 mm × 14 mm, 0.5 mm pitch) with exposed thermal pad; RoHS-compliant, lead-free finish.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microcontroller applications.

Compared with TMS570LS1227ZWTQ and STM32F407VGT6, the LM3S2965-IBZ50-A2 offers unique integration of CAN 2.0B hardware, hibernation with RTC, and deterministic Cortex-M3 timing - making it optimal for cost-sensitive, low-power industrial nodes where safety certification or floating-point throughput are secondary to protocol offload and energy efficiency.

Availability

LM3S2965-IBZ50-A2 is available at Aetrix Electronics and suitable for industrial motor control, building automation gateways, energy metering nodes, and remote sensor hubs requiring stable component supply and long-term lifecycle support.

Supply support for LM3S2965-IBZ50-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, delivering analog and embedded processing solutions across industrial, automotive, and consumer markets since 1930.

The Stellaris LM3S family was designed specifically for cost-effective, real-time industrial control applications - integrating CAN, hibernation, and analog peripherals into a single Cortex-M3 MCU to reduce system complexity and bill-of-materials cost.

FAQ

What is the maximum operating frequency of the LM3S2965-IBZ50-A2?

The LM3S2965-IBZ50-A2 operates at a maximum system clock frequency of 50 MHz, derived from its internal PLL or external crystal oscillator. This speed is factory-trimmed and guaranteed across the industrial temperature range (–40°C to +85°C). The LM3S2965-IBZ50-A2 achieves consistent instruction throughput and interrupt latency at this frequency, enabling precise timing for motor control PWM and CAN bit timing.

Does the LM3S2965-IBZ50-A2 include a hardware CAN controller?

Yes, the LM3S2965-IBZ50-A2 integrates a fully compliant CAN 2.0B controller with 32 message objects, programmable acceptance filtering, and automatic retransmission. It supports bit rates up to 1 Mbps and includes dedicated CAN0RX/CAN0TX pins. Unlike software-emulated CAN, this hardware block offloads protocol handling from the Cortex-M3 core, ensuring deterministic timing for industrial network communication in the LM3S2965-IBZ50-A2.

What power-saving features does the LM3S2965-IBZ50-A2 support?

The LM3S2965-IBZ50-A2 includes multiple low-power modes: sleep, deep-sleep, and hibernate. Its hibernation module supports RTC operation and 2 KB of battery-backed RAM at <1 µA typical current. Wake-up sources include external pins, RTC match, and HIB interrupt - all managed in hardware without CPU involvement. These features make the LM3S2965-IBZ50-A2 suitable for battery-powered remote monitoring applications where extended operational life is essential.

Is the LM3S2965-IBZ50-A2 pin-compatible with other Stellaris LM3S devices?

No, the LM3S2965-IBZ50-A2 is not pin-compatible with other LM3S devices outside its specific variant group. While it shares the LQFP-100 package with some members of the LM3S29xx series, pin functions (e.g., CAN0RX location, ADC channel mapping, and hibernation control signals) differ across variants. Board layout must be verified against the LM3S2965-IBZ50-A2-specific pinout diagram; migration requires schematic and layout revision.

What development tools are supported for the LM3S2965-IBZ50-A2?

The LM3S2965-IBZ50-A2 is supported by Texas Instruments' Code Composer Studio™ IDE, Keil MDK-ARM, and IAR Embedded Workbench. TI's StellarisWare Peripheral Driver Library provides production-ready drivers for all on-chip peripherals, including CAN, ADC, and hibernation modules. Evaluation is enabled via the original Stellaris DK-LM3S9B96 development kit, which includes JTAG debugging and example firmware targeting the LM3S2965-IBZ50-A2 feature set.