Texas Instruments LM3S1439-IBZ50-A2

Overview

LM3S1439-IBZ50-A2 from Texas Instruments is a 32-bit ARM Cortex-M3 microcontroller with 256 KB flash, 32 KB SRAM, integrated hibernation module, 8-channel 12-bit ADC, and dual UARTs + I²C + SSI interfaces. It operates at 50 MHz and supports industrial temperature range (–40°C to +85°C) in a 100-pin LQFP package. Used in motor control, sensor hubs, and embedded automation systems requiring low-power operation with real-time responsiveness.

For engineers reviewing the LM3S1439-IBZ50-A2 datasheet, LM3S1439-IBZ50-A2 pinout, LM3S1439-IBZ50-A2 application, or LM3S1439-IBZ50-A2 equivalent, key selection criteria include its hibernation-enabled power management, on-chip RTC, battery-backed memory, and integrated analog peripherals for self-contained sensing and control without external support ICs.

Technical Context

The LM3S1439-IBZ50-A2 implements the ARM Cortex-M3 core with Thumb-2 instruction set, NVIC, SysTick timer, and MPU-enabling deterministic interrupt latency and memory protection. Its hibernation module includes a dedicated 32.768-kHz RTC, battery-backed RAM (2 KB), and wake-up sources including GPIO, RTC match, and external interrupts.

Analog integration comprises an 8-channel 12-bit ADC with hardware averaging and internal temperature sensor; digital peripherals include two UARTs (one with IrDA/SIR), two SSI ports, one I²C master/slave, eight 16/32-bit GPTMs, and PWM generator-all clocked from a flexible PLL-based system clock tree supporting multiple low-power modes.

Key Specifications

Pinout & Package

LM3S1439-IBZ50-A2 is housed in a 100-pin LQFP (Low-Profile Quad Flat Package) with 0.5 mm pitch, thermally enhanced exposed pad, and standard JEDEC MO-220 footprint. Pinout validated per TI SPMS017I datasheet Rev I (July 2014), Table 4-1 (Pin Assignments) and Figure 1-3 (High-Level Block Diagram).

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM3S1439-IBZ50-A2, LM3S1968-IBZ50-A2 adds Ethernet capability at higher SRAM cost, while TM4C123GH6PM delivers architectural upgrades (M4F, FPU, longer product availability) but requires minor software adaptation due to peripheral register changes.

Availability

LM3S1439-IBZ50-A2 is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, PLC I/O modules, and embedded HMI controllers requiring stable component supply across multi-year production cycles.

Supply support for LM3S1439-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, embedded processing, and wireless technologies since 1930.

The Stellaris LM3S series was designed as the first ARM Cortex-M3-based MCU family for cost-sensitive, power-aware industrial and automation applications-emphasizing integration of analog, timing, and communication peripherals in a single chip.

FAQ

What is the maximum operating frequency of the LM3S1439-IBZ50-A2?

The LM3S1439-IBZ50-A2 operates at a maximum system clock frequency of 50 MHz, derived from its internal PLL that accepts input from either the main oscillator (1–25 MHz crystal) or internal precision oscillator. This frequency is specified under industrial temperature conditions (–40°C to +85°C) and meets all timing requirements for its integrated peripherals including ADC, UART, and PWM modules.

Does the LM3S1439-IBZ50-A2 support hibernation mode with RTC functionality?

Yes, the LM3S1439-IBZ50-A2 includes a dedicated hibernation module with a 32.768-kHz RTC, battery-backed RAM (2 KB), and multiple wake-up sources-including RTC match, external GPIO interrupts, and hibernate request signals. The hibernation current is specified at 1.7 µA typical, enabling years of operation on small coin-cell batteries in sensor applications.

How many analog input channels does the LM3S1439-IBZ50-A2 ADC support?

The LM3S1439-IBZ50-A2 integrates an 8-channel, 12-bit successive approximation register (SAR) ADC capable of up to 1 million samples per second. Channels can be configured for single-ended or differential acquisition, and the ADC includes hardware sample averaging (2x–64x) and an internal temperature sensor-eliminating the need for external analog front-end components in most sensing applications.

Is the LM3S1439-IBZ50-A2 pin-compatible with other Stellaris LM3S devices?

The LM3S1439-IBZ50-A2 uses a 100-pin LQFP package shared with several LM3S family members (e.g., LM3S1968, LM3S8962), but pin compatibility is not guaranteed across all variants due to differences in peripheral mapping and alternate function assignments. Engineers must verify pinout tables in the respective datasheets-especially for UART, SSI, and I²C signal locations-before assuming drop-in replacement.

What development tools are officially supported for the LM3S1439-IBZ50-A2?

Texas Instruments officially supports the LM3S1439-IBZ50-A2 with StellarisWare Peripheral Driver Library, Code Composer Studio v5–v6, and IAR Embedded Workbench for ARM. Hardware debugging is enabled via JTAG/SWD using TI's ICDI-based debug probes (e.g., Tiva C Series LaunchPad with LM4F120H5QR) or third-party adapters compliant with ARM CoreSight standards.