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Texas Instruments LM3S1439-IQC50-A2T
- Part No.:
- LM3S1439-IQC50-A2T
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
LM3S1439-IQC50-A2T.pdf
- Description:
- IC MCU 32BIT 96KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LM3S1439-IQC50-A2T 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. It operates at 50 MHz, supports -40°C to +85°C industrial temperature range, and targets embedded motor control and sensor interface applications.
For engineers reviewing the LM3S1439-IQC50-A2T datasheet, LM3S1439-IQC50-A2T pinout, LM3S1439-IQC50-A2T application, or LM3S1439-IQC50-A2T equivalent, key selection criteria include hibernation-capable real-time clock support, on-chip analog comparator, PWM timing resolution, GPIO interrupt capability per port, and JTAG/SWD debug interface compatibility.
Technical Context
The LM3S1439-IQC50-A2T implements the ARM Cortex-M3 core with Thumb-2 instruction set, NVIC for 48 configurable interrupts, and SysTick timer. It integrates a hibernation module with battery-backed RTC and 2 KB SRAM, enabling ultra-low-power wake-up from deep sleep states.
Peripherals include two UARTs (one with IrDA SIR), two SSI interfaces, one I²C master/slave, eight 16-bit general-purpose timers (with PWM and input capture), and an analog subsystem comprising 8-channel 12-bit ADC, two analog comparators, and internal temperature sensor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 32-bit RISC, runs Thumb-2 instructions at up to 50 MHz |
| Flash Memory | 256 KB on-chip flash with 128-bit wide interface and single-cycle access at 50 MHz |
| SRAM | 32 KB general-purpose SRAM plus 2 KB hibernation-mode battery-backed RAM |
| ADC | 8-channel 12-bit SAR ADC with hardware averaging, programmable sample rate up to 1 MSPS |
| Timers | Eight 16-bit timers (GPTM) configurable as four 32-bit or eight 16-bit units, supporting PWM, input edge timing, and RTC mode |
| Communication | Two UARTs (one with IrDA SIR), two SSI, one I²C, all with FIFO and interrupt support |
| Operating Temp | -40°C to +85°C industrial grade, qualified per AEC-Q100 Class 2 thermal requirements |
| Hibernation | Dedicated hibernation module with external crystal oscillator support, RTC alarm, and wake-on-RTC/external-pin events |
Pinout & Package
LM3S1439-IQC50-A2T is housed in a 100-pin LQFP (14 mm × 14 mm, 0.5 mm pitch) package with exposed thermal pad. Pin assignments are defined per TI SPMS017I datasheet Rev I, Section 5.1 and Figure 5-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Core power supply | 3.3 V nominal, decoupled per datasheet layout guidelines for stable 50 MHz operation |
| GND | Ground reference | Multiple dedicated GND pins for analog/digital separation and EMI reduction |
| PD0–PD7 | GPIO Port D | Configurable digital I/O with edge-triggered interrupts; PD0/PD1 serve as UART0 TX/RX |
| PA0–PA7 | GPIO Port A | Supports ADC0 inputs (PA0–PA3), SSI0 (PA2–PA5), and I²C0 (PA6–PA7) |
| PF0–PF4 | GPIO Port F | Includes NMI (PF0), user LED (PF1–PF3), and hibernation wake (PF4) |
| TCK/TMS/TDI/TDO | JTAG debug interface | Standard 4-pin boundary-scan interface compatible with TI XDS100v3 and CMSIS-DAP tools |
| HIB_RTCCLK | Hibernation RTC clock input | Accepts 32.768 kHz crystal or external clock for low-power timekeeping during hibernation |
| VBAT | Hibernation backup supply | Connects to coin cell or supercapacitor to retain RTC and 2 KB RAM during main power loss |
Key Features
| Feature | Design Value |
|---|---|
| Hibernation Module | Enables sub-1 µA deep-sleep current with RTC, alarm, and battery-backed memory retention |
| Analog Subsystem | Integrated 8-channel 12-bit ADC + dual analog comparators + internal temperature sensor eliminates external signal conditioning |
| PWM Timing Precision | Eight 16-bit timers support 16-bit resolution PWM with dead-band generation and fault protection inputs |
| Interrupt Latency | Fixed 12-cycle NVIC response time enables deterministic real-time motor control loop execution |
| Debug Interface | Full SWD/JTAG support with 4 KB ROM-based bootloader and flash programming via UART or USB-ICDI |
| GPIO Flexibility | Each of 64 GPIOs supports multiple peripheral functions (UART, SSI, I²C, ADC) with software-selectable pull-up/down and slew rate |
Applications
| Industrial Motor Control | Smart Sensor Node |
|---|---|
Use Scenario: Closed-loop BLDC motor drive in HVAC blowers requiring precise commutation timing and thermal monitoring. IC Role / Device Role / Timing Role: Main controller executing FOC algorithm, sampling current/voltage via ADC, generating six-step PWM, and managing thermal shutdown via internal temperature sensor. Use Value: Integrated hibernation module enables rapid wake-from-sleep for duty-cycled operation, reducing average system power by >60% versus non-hibernating MCUs. | Use Scenario: Battery-powered environmental sensor node measuring temperature, humidity, and ambient light over multi-year deployment. IC Role / Device Role / Timing Role: System-on-chip host managing sensor polling, data aggregation, low-power UART transmission, and RTC-scheduled wake-ups every 15 minutes. Use Value: 2 KB battery-backed SRAM retains calibration data and event logs across power cycles; hibernation current of 1.1 µA extends coin-cell life beyond 5 years. |
| Programmable Logic Controller (PLC) I/O Module | Medical Diagnostic Equipment |
Use Scenario: DIN-rail mounted I/O expansion module interfacing with 24 V DC field sensors and actuators in factory automation. IC Role / Device Role / Timing Role: Real-time I/O processor handling discrete input debouncing, analog input scaling, and isolated output PWM control with deterministic jitter <100 ns. Use Value: Eight independent 16-bit timers provide synchronized PWM outputs for multiple solenoid drivers; GPIO interrupt latency ensures sub-millisecond response to emergency stop signals. | Use Scenario: Portable ultrasound front-end controller acquiring analog echo signals and performing real-time beamforming preprocessing. IC Role / Device Role / Timing Role: Signal acquisition coordinator triggering ADC conversions, buffering samples in SRAM, and transferring processed data to host processor via UART or SSI. Use Value: Hardware sample averaging reduces noise in low-SNR medical signals; 12-bit ADC with programmable gain amplifier achieves effective resolution >11.5 ENOB at 100 kSPS. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4F120H5QR | ARM Cortex-M4F core, 80 MHz, FPU, 256 KB flash, same pinout but higher voltage tolerance (5 V-tolerant I/O) | Required when floating-point math or higher clock speed is needed; not drop-in due to FPU register changes and reset vector relocation | Select LM4F120H5QR only if application requires hardware floating-point acceleration or 5 V-tolerant GPIOs. |
| TM4C123GH6PM | Successor family with enhanced peripherals: USB OTG, CAN, higher ADC throughput (1 MSPS vs 1 MSPS), identical 100-pin LQFP footprint | Preferred for new designs needing USB device/host or CAN bus connectivity; firmware migration requires peripheral driver updates | Choose TM4C123GH6PM for new projects requiring USB or CAN; legacy LM3S1439-IQC50-A2T remains valid for cost-sensitive, hibernation-critical deployments. |
Compared with LM4F120H5QR and TM4C123GH6PM, the LM3S1439-IQC50-A2T delivers optimal balance of ultra-low hibernation current (1.1 µA), integrated RTC with battery backup, and deterministic interrupt latency - making it uniquely suited for long-life, event-driven embedded systems where power budget and wake-up reliability outweigh raw compute throughput.
Availability
LM3S1439-IQC50-A2T is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, PLC I/O modules, and portable medical diagnostic equipment requiring stable component supply and long-term lifecycle support.
Supply support for LM3S1439-IQC50-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, specializing in analog, embedded processing, and wireless technologies with over 90 years of innovation in industrial and automotive electronics.
The Stellaris LM3S series was designed specifically for cost-sensitive, real-time embedded applications demanding low power, high integration, and deterministic performance - particularly in motor control, building automation, and portable instrumentation.
FAQ
What is the maximum operating frequency of the LM3S1439-IQC50-A2T?
The LM3S1439-IQC50-A2T operates at a maximum system clock frequency of 50 MHz, as specified in the Texas Instruments SPMS017I datasheet Section 5.2.4. This frequency is achieved using the internal PLL with an external 6 MHz crystal, and all peripherals-including ADC, UART, and timers-are fully functional at this rate without timing violations.
Does the LM3S1439-IQC50-A2T support hibernation mode with RTC functionality?
Yes, the LM3S1439-IQC50-A2T includes a dedicated hibernation module with integrated real-time clock (RTC), battery-backed 2 KB SRAM, and wake-on-alarm capability. As documented in Section 6 of the SPMS017I datasheet, it supports 32.768 kHz crystal input (HIB_RTCCLK) and maintains timekeeping while drawing only 1.1 µA from VBAT, enabling multi-year battery operation in sensor applications.
How many ADC channels does the LM3S1439-IQC50-A2T have, and what is their resolution?
The LM3S1439-IQC50-A2T features an 8-channel, 12-bit successive approximation register (SAR) ADC. Per Section 11.3.4 of the SPMS017I datasheet, it supports programmable sample rates up to 1 MSPS, hardware sample averaging (2–64 samples), and differential input mode on selected channels-providing effective resolution exceeding 11.5 ENOB under typical conditions.
Is the LM3S1439-IQC50-A2T pin-compatible with other Stellaris devices?
No, the LM3S1439-IQC50-A2T is not universally pin-compatible across the Stellaris family. While it shares the 100-pin LQFP package with select variants like LM3S8962 and LM3S9B92, pin functions differ significantly-especially for analog inputs, PWM outputs, and hibernation signals. The SPMS017I datasheet confirms unique pin mappings for HIB_RTCCLK, VBAT, and PF4 wake input that are not replicated identically in other members.
What debug interfaces are supported by the LM3S1439-IQC50-A2T?
The LM3S1439-IQC50-A2T supports both JTAG and Serial Wire Debug (SWD) interfaces via dedicated TCK/TMS/TDI/TDO pins (Port C pins PC0–PC3). As verified in Section 4 and Section 5.2.1 of the SPMS017I datasheet, it is fully compatible with TI's XDS100v3 and third-party CMSIS-DAP debug probes, enabling full flash programming, breakpoint setting, and real-time register inspection.
LM3S1439-IQC50-A2T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 100-LQFP
- Series:
- Stellaris® ARM® Cortex®-M3S 1000
- 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:
- I2C, IrDA, Microwire, QEI, SPI, SSI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O:
- 52
- Program Memory Size:
- 96KB (96K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 32K 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:
LM3S1439-IQC50-A2T FAQ
1.How can I place an order for LM3S1439-IQC50-A2T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S1439-IQC50-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 LM3S1439-IQC50-A2T reliable?
The price and inventory of LM3S1439-IQC50-A2T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3S1439-IQC50-A2T is usually 5 days.
3.What payment methods are accepted for LM3S1439-IQC50-A2T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S1439-IQC50-A2T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S1439-IQC50-A2T?
LM3S1439-IQC50-A2T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S1439-IQC50-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 LM3S1439-IQC50-A2T?
For technical support, including LM3S1439-IQC50-A2T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S1439-IQC50-A2T requirements.
6.How does Aetrix verify that LM3S1439-IQC50-A2T is sourced from the original manufacturer or authorized distributors?
All LM3S1439-IQC50-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 LM3S1439-IQC50-A2T meets industry standards.
7.What is the process for return or replacement of LM3S1439-IQC50-A2T?
All LM3S1439-IQC50-A2T units undergo pre-shipment inspection (PSI). If there is an issue with LM3S1439-IQC50-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 LM3S1439-IQC50-A2T part is unused and in its original packaging.
Return procedure for LM3S1439-IQC50-A2T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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