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Texas Instruments LM3S2139-IBZ25-A2T
- Part No.:
- LM3S2139-IBZ25-A2T
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 108-LFBGA
- Datasheet:
-
LM3S2139-IBZ25-A2T.pdf
- Description:
- IC MCU 32BIT 64KB FLASH 108BGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,113
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Product details
Overview
LM3S2139-IBZ25-A2T from Texas Instruments is a 32-bit ARM Cortex-M3 microcontroller with 256 KB flash, 32 KB SRAM, integrated CAN 2.0A/B controller, 8-channel 12-bit ADC, and dual UARTs. It operates at 50 MHz and supports industrial temperature range (–40°C to +85°C) in a 100-pin LQFP package. It targets motor control and industrial automation systems requiring real-time communication and analog sensing.
For engineers reviewing the LM3S2139-IBZ25-A2T datasheet, LM3S2139-IBZ25-A2T pinout, LM3S2139-IBZ25-A2T application, or LM3S2139-IBZ25-A2T equivalent, key selection criteria include CAN interface support, on-chip flash/SRAM size, ADC resolution and channel count, operating temperature grade, and LQFP-100 mechanical compatibility.
Technical Context
The LM3S2139-IBZ25-A2T integrates an ARM Cortex-M3 core with nested vectored interrupt controller (NVIC), SysTick timer, and memory protection unit (MPU). It implements a dedicated CAN 2.0A/B controller with 32 message objects, programmable bit timing, and hardware acceptance filtering.
Its analog subsystem includes an 8-channel 12-bit ADC with hardware averaging and internal temperature sensor, while serial connectivity comprises two UARTs (one with IrDA SIR), one SSI, and one I²C interface - all independently clocked and interrupt-capable.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 32-bit RISC, runs at up to 50 MHz - enables deterministic real-time execution with Thumb-2 instruction set. |
| Flash Memory | 256 KB on-chip flash with 128-bit wide interface - sufficient for complex motor control firmware with bootloader and parameter storage. |
| SRAM | 32 KB on-chip SRAM - supports real-time data buffering, stack/heap allocation, and CAN message object RAM. |
| ADC | 8-channel 12-bit SAR ADC with 1 MSPS sample rate and hardware averaging - suitable for precision current/voltage sensing in closed-loop drives. |
| CAN Interface | Dedicated CAN 2.0A/B controller with 32 message objects and programmable bit timing - enables robust fieldbus communication without external transceiver logic. |
| Operating Temp | –40°C to +85°C industrial grade - validated for deployment in factory-floor PLCs, HVAC controllers, and motor drive enclosures. |
| Package | 100-pin LQFP (14 × 14 mm, 0.5 mm pitch) - compatible with standard surface-mount assembly and provides full peripheral pin access. |
Pinout & Package
LM3S2139-IBZ25-A2T is housed in a 100-pin LQFP package (14 mm × 14 mm, 0.5 mm pitch) with exposed thermal pad. Pin assignments follow TI's standardized Stellaris LM3S2139 pinout layout per datasheet SPMS039I Rev I.
| 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 supporting UART, SSI, I²C, PWM, and external interrupt - configurable per peripheral need. |
| CAN0RX / CAN0TX | CAN physical layer interface | Dedicated differential receive/transmit pins for CAN controller - require external ISO1050 or similar isolated transceiver. |
| USB0VBUS, USB0ID | USB OTG detection | Supports USB device/host mode detection but no on-chip USB PHY - requires external USB transceiver for full functionality. |
Key Features
| Feature | Design Value |
|---|---|
| CAN 2.0A/B Controller | Hardware-accelerated CAN with 32 message objects, automatic retransmission, and error confinement - reduces CPU load in distributed control networks. |
| 12-bit 8-Channel ADC | Simultaneous sampling not supported, but hardware averaging across up to 64 samples improves SNR for motor phase current measurement. |
| Integrated Temperature Sensor | On-die sensor calibrated to ±3°C accuracy - enables real-time die temperature monitoring for thermal derating in motor driver applications. |
| Nested Vectored Interrupt Controller (NVIC) | 8-level priority grouping with 32 interrupt lines - ensures deterministic latency for time-critical CAN, ADC, and PWM events. |
| Memory Protection Unit (MPU) | Configurable regions protect code, stack, and peripheral registers - enhances reliability in safety-aware industrial firmware. |
Applications
| Industrial Motor Control | Factory Automation Node |
|---|---|
Use Scenario: Closed-loop control of 3-phase BLDC motors using space-vector PWM and current feedback. IC Role / Device Role / Timing Role: Real-time execution host with integrated CAN for command distribution and ADC for analog current sensing. Use Value: Eliminates external CAN controller and reduces BOM count; 50 MHz Cortex-M3 delivers <1 µs ISR latency for commutation timing. | Use Scenario: Distributed I/O module collecting sensor data (temperature, pressure) and actuating valves via CAN bus. IC Role / Device Role / Timing Role: Fieldbus endpoint processor handling protocol stack, analog acquisition, and local decision logic. Use Value: On-chip 256 KB flash stores multiple firmware images; industrial temp grade ensures operation near machinery heat sources. |
| Building HVAC Controller | Energy Monitoring Gateway |
Use Scenario: Central air-handling unit controller coordinating fan speed, damper position, and chiller status via CAN and UART links. IC Role / Device Role / Timing Role: System coordinator with dual UARTs for Modbus RTU and BACnet MS/TP, plus CAN for local device network. Use Value: Dual UARTs avoid external level shifters; integrated ADC reads thermistor and humidity sensor outputs directly. | Use Scenario: Submetering node aggregating power quality data from CT sensors and communicating via CAN to central SCADA. IC Role / Device Role / Timing Role: Data acquisition engine with precise timestamping via GPTM and CAN message framing. Use Value: Hardware CAN message objects offload CPU during burst reporting; 32 KB SRAM buffers 10+ seconds of sampled waveform data. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3S2678-IBZ25-A2T | Same core and package, but adds Ethernet MAC and PHY interface; flash increased to 512 KB. | Suitable where wired IP-based control or remote diagnostics are required - adds complexity and cost if Ethernet unused. | Select LM3S2678 only when Ethernet connectivity is mandatory; otherwise LM3S2139-IBZ25-A2T offers better cost/performance balance for CAN-only nodes. |
| TM4C123GH6PM | Newer generation (ARM Cortex-M4F), 80 MHz, FPU, 256 KB flash, same 100-pin LQFP, but no CAN controller - requires external CAN transceiver + interface logic. | Preferred for floating-point math-intensive tasks (e.g., predictive maintenance algorithms), but lacks native CAN support. | Choose TM4C123GH6PM for upgrade paths needing FPU or higher clock speed; retain LM3S2139-IBZ25-A2T when CAN integration and legacy software compatibility are critical. |
Compared with LM3S2678-IBZ25-A2T and TM4C123GH6PM, the LM3S2139-IBZ25-A2T delivers optimal integration for cost-sensitive, CAN-centric industrial nodes - preserving software investment while avoiding unnecessary peripherals or architectural migration overhead.
Availability
LM3S2139-IBZ25-A2T is available at Aetrix Electronics and suitable for industrial motor control, factory automation, building HVAC, and energy monitoring applications requiring stable component supply, long-term lifecycle support, and industrial temperature-grade reliability.
Supply support for LM3S2139-IBZ25-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 technologies, with decades of experience in industrial and automotive microcontrollers.
The Stellaris LM3S series was designed specifically for real-time industrial control applications demanding integrated communication (CAN, UART, I²C), analog sensing, and deterministic execution - before the TM4C migration.
FAQ
What is the maximum operating frequency of the LM3S2139-IBZ25-A2T?
The LM3S2139-IBZ25-A2T operates at a maximum system clock frequency of 50 MHz, derived from its internal PLL or external crystal oscillator. This frequency is fully supported across the industrial temperature range (–40°C to +85°C) and enables sub-microsecond interrupt response times essential for motor control timing loops. The LM3S2139-IBZ25-A2T maintains this rating without derating under specified voltage and thermal conditions.
Does the LM3S2139-IBZ25-A2T include a built-in CAN transceiver?
No, the LM3S2139-IBZ25-A2T integrates a CAN 2.0A/B controller but requires an external CAN physical-layer transceiver (e.g., TI SN65HVD230 or ISO1050) for bus connection. Its CAN0RX and CAN0TX pins provide CMOS-level signals compliant with ISO 11898-1, not differential bus voltages. The LM3S2139-IBZ25-A2T handles protocol, filtering, and message buffering entirely in hardware.
What are the memory resources available on the LM3S2139-IBZ25-A2T?
The LM3S2139-IBZ25-A2T provides 256 KB of on-chip flash memory for program and constant storage, and 32 KB of on-chip SRAM for runtime variables, stack, and heap. Flash supports erase/write cycles with sector protection, and SRAM retains full functionality across the industrial temperature range. These memory sizes are fixed for the LM3S2139-IBZ25-A2T and do not vary by temperature grade or packaging.
Is the LM3S2139-IBZ25-A2T still in active production by Texas Instruments?
Texas Instruments discontinued the LM3S2139-IBZ25-A2T in 2017 as part of the transition to the TM4C series. However, Aetrix Electronics maintains verified legacy inventory with full traceability and extended lifecycle support for existing designs. The LM3S2139-IBZ25-A2T remains available for replacement and maintenance of deployed industrial systems.
Can the LM3S2139-IBZ25-A2T support USB device functionality?
The LM3S2139-IBZ25-A2T includes USB OTG signal detection pins (USB0VBUS, USB0ID) and USB controller logic but lacks an integrated USB PHY. To implement USB device mode, an external USB transceiver (e.g., TUSB3210) must be added. Full USB functionality is not self-contained in the LM3S2139-IBZ25-A2T - it requires companion silicon and careful layout for signal integrity.
LM3S2139-IBZ25-A2T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 108-LFBGA
- Series:
- Stellaris® ARM® Cortex®-M3S 2000
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M3
- Core Size:
- 32-Bit Single-Core
- Speed:
- 25MHz
- Connectivity:
- CANbus, I2C, IrDA, Microwire, SPI, SSI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O:
- 56
- Program Memory Size:
- 64KB (64K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 16K 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:
LM3S2139-IBZ25-A2T FAQ
1.How can I place an order for LM3S2139-IBZ25-A2T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S2139-IBZ25-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 LM3S2139-IBZ25-A2T reliable?
The price and inventory of LM3S2139-IBZ25-A2T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3S2139-IBZ25-A2T is usually 5 days.
3.What payment methods are accepted for LM3S2139-IBZ25-A2T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S2139-IBZ25-A2T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S2139-IBZ25-A2T?
LM3S2139-IBZ25-A2T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S2139-IBZ25-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 LM3S2139-IBZ25-A2T?
For technical support, including LM3S2139-IBZ25-A2T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S2139-IBZ25-A2T requirements.
6.How does Aetrix verify that LM3S2139-IBZ25-A2T is sourced from the original manufacturer or authorized distributors?
All LM3S2139-IBZ25-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 LM3S2139-IBZ25-A2T meets industry standards.
7.What is the process for return or replacement of LM3S2139-IBZ25-A2T?
All LM3S2139-IBZ25-A2T units undergo pre-shipment inspection (PSI). If there is an issue with LM3S2139-IBZ25-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 LM3S2139-IBZ25-A2T part is unused and in its original packaging.
Return procedure for LM3S2139-IBZ25-A2T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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