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Texas Instruments LM3S1439-IQC50-A2
- Part No.:
- LM3S1439-IQC50-A2
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
LM3S1439-IQC50-A2.pdf
- Description:
- IC MCU 32BIT 96KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LM3S1439-IQC50-A2 from Texas Instruments is a 32-bit ARM Cortex-M3 microcontroller with 256 KB flash, 32 KB SRAM, integrated hibernation module, 8-channel 10-bit ADC, and dual UARTs. It operates at 50 MHz, supports 3.3 V supply, and targets low-power industrial control and sensor interface applications.
For engineers reviewing the LM3S1439-IQC50-A2 datasheet, LM3S1439-IQC50-A2 pinout, LM3S1439-IQC50-A2 application, or LM3S1439-IQC50-A2 equivalent, key selection criteria include hibernation-capable real-time clock support, on-chip analog peripherals, and JTAG/SWD debug interface compatibility.
Technical Context
The LM3S1439-IQC50-A2 implements the ARM Cortex-M3 core with Thumb-2 instruction set, nested vectored interrupt controller (NVIC), and memory protection unit (MPU). 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 supporting IrDA and SIR modes, one I²C master/slave interface, one SSI port, eight general-purpose timers (including RTC-capable GPTM), and an analog comparator with internal reference. All digital I/Os are 5-V tolerant with programmable slew rate and drive strength.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 50 MHz max operation - enables deterministic real-time execution with hardware divide and single-cycle MAC. |
| Flash Memory | 256 KB - sufficient for complex firmware with bootloader, communication stacks, and application logic in single-chip design. |
| SRAM | 32 KB main + 2 KB hibernate - supports active data buffering and retains critical state during battery-powered sleep. |
| ADC | 10-bit, 8-channel, 1 MSPS - suitable for direct sensor signal acquisition without external signal conditioning in industrial monitoring. |
| Hibernation Module | RTC + battery-backed 2 KB SRAM + wake-on-external-pin - enables years of operation on coin-cell power in remote telemetry nodes. |
| I/O Voltage Tolerance | 5 V tolerant on all GPIOs - simplifies interfacing with legacy 5 V logic and sensors without level-shifting components. |
| Debug Interface | JTAG + SWD - provides full visibility into register state, memory, and peripheral configuration during development and field diagnostics. |
Pinout & Package
LM3S1439-IQC50-A2 is housed in a 100-pin LQFP package (14 mm × 14 mm, 0.5 mm pitch) with exposed thermal pad. Pin assignments are validated per TI SPMS017I datasheet Rev I (July 2014).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Core & I/O supply | 3.3 V nominal input; requires local 10 µF + 0.1 µF decoupling per power domain. |
| GND | Ground reference | Multiple dedicated pins ensure low-impedance return paths for analog/digital domains. |
| PD0–PD7 | GPIO / UART0 / SSI0 | Multi-function bank supporting high-speed serial interfaces or bit-banged protocols. |
| PH0–PH3 | GPIO / ADC0 / Comparator | Analog-capable inputs with internal 1.65 V reference; support differential sampling. |
| TCK/TMS/TDO/TDI/nTRST | JTAG debug interface | Enables full boundary-scan testing and real-time debugging without halting CPU execution. |
| HIBERNATE_RTCCLK | Hibernation module clock input | Accepts external 32.768 kHz crystal or oscillator for precise timekeeping during sleep. |
Key Features
| Feature | Design Value |
|---|---|
| Hibernation mode with RTC | Reduces active current to 1.7 µA while maintaining accurate timekeeping and wake-on-event capability. |
| Integrated analog subsystem | Combines 8-channel 10-bit ADC, analog comparator, and internal temperature sensor - eliminates need for external signal chain ICs. |
| 5-V-tolerant GPIOs | Eliminates level shifters when interfacing with 5 V sensors, displays, or legacy controllers in mixed-voltage systems. |
| Dual UART with IrDA support | Enables robust wireless infrared communication and RS-232/RS-485 interface via external transceivers. |
| Programmable slew rate control | Reduces EMI and signal integrity issues by limiting edge rates on high-speed digital outputs. |
Applications
| Industrial Sensor Node | Smart Energy Meter |
|---|---|
Use Scenario: Remote environmental monitoring using temperature, humidity, and pressure sensors with periodic wireless upload. IC Role / Device Role / Timing Role: Central controller managing sensor polling, data aggregation, low-power hibernation scheduling, and UART-based RF module communication. Use Value: Hibernation module extends battery life to >5 years on CR2032; integrated ADC and comparator reduce BOM count by 3 discrete analog components. | Use Scenario: Residential electricity meter with tamper detection, pulse counting, and LCD display interface. IC Role / Device Role / Timing Role: Main metering MCU handling kWh calculation, optical pulse input capture, real-time tariff switching, and IR communication for utility readout. Use Value: Dual UART supports simultaneous IR utility interface and RS-485 HAN communication; 5-V-tolerant GPIOs directly interface with opto-isolated pulse inputs. |
| Programmable Logic Controller (PLC) I/O Module | Building Automation Controller |
Use Scenario: DIN-rail mounted I/O expansion module with digital input/output, analog input, and Modbus RTU over RS-485. IC Role / Device Role / Timing Role: Real-time I/O processor executing cyclic scan logic, analog scaling, and Modbus protocol stack with deterministic timing. Use Value: 50 MHz Cortex-M3 ensures sub-millisecond scan times; integrated hibernation allows safe firmware update during power loss with retained context. | Use Scenario: HVAC zone controller integrating temperature sensing, valve actuation, occupancy detection, and BACnet MS/TP communication. IC Role / Device Role / Timing Role: System-on-chip controller running PID loops, managing I²C sensor network, and driving PWM fan/valve outputs. Use Value: Eight GPTM channels support concurrent PWM generation and input capture; internal temperature sensor enables self-calibration without external thermistor. |
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, 32 KB SRAM - higher performance but no hibernation module. | Lacks battery-backed RTC and hibernate SRAM; requires external RTC for long-term timekeeping in sleep. | Select when floating-point math or higher throughput is required and hibernation is not critical. |
| TM4C123GH6PM | Same Cortex-M4F core as LM4F120H5QR, adds USB OTG, enhanced analog, and updated peripheral set. | No native hibernation module; uses deep-sleep with retention RAM only - no battery-backed RTC or SRAM. | Choose for USB-enabled designs or where TI's newer TivaWare™ software ecosystem is preferred over legacy StellarisWare®. |
Compared with LM3S1439-IQC50-A2, LM4F120H5QR offers floating-point acceleration but sacrifices hibernation capability, while TM4C123GH6PM adds USB and modern peripherals at the cost of battery-backed timekeeping - making LM3S1439-IQC50-A2 uniquely suited for long-life, battery-operated time-critical edge nodes.
Availability
LM3S1439-IQC50-A2 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart energy meters, PLC I/O modules, and building automation controllers requiring stable component supply across extended production lifecycles.
Supply support for LM3S1439-IQC50-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 connectivity solutions for industrial, automotive, and consumer markets.
The LM3S1439-IQC50-A2 belongs to the Stellaris LM3S family - designed specifically for cost-sensitive, low-power embedded control applications requiring integrated analog, hibernation, and real-time responsiveness without external support chips.
FAQ
What is the maximum operating frequency of the LM3S1439-IQC50-A2?
The LM3S1439-IQC50-A2 operates at a maximum system clock frequency of 50 MHz, derived from its internal PLL or external crystal oscillator. This speed is specified under 3.3 V supply and industrial temperature range (–40°C to +85°C), and enables deterministic real-time response for control loops and communication stacks. The LM3S1439-IQC50-A2 maintains this rating without derating in typical PCB layouts with proper decoupling.
Does the LM3S1439-IQC50-A2 support hibernation with battery backup?
Yes, the LM3S1439-IQC50-A2 includes a dedicated hibernation module with battery-backed real-time clock (RTC) and 2 KB of SRAM. When powered from a coin cell (VBAT), it maintains timekeeping and critical data while drawing only 1.7 µA. The LM3S1439-IQC50-A2 supports wake-up events including RTC match, external pin assertion, and GPIO change detection - verified in TI SPMS017I Section 6.
What debug interfaces does the LM3S1439-IQC50-A2 provide?
The LM3S1439-IQC50-A2 supports both JTAG and Serial Wire Debug (SWD) interfaces via dedicated TCK, TMS, TDO, TDI, and nTRST pins. These enable full-featured debugging including breakpoints, watchpoints, register inspection, and flash programming using TI's Code Composer Studio or third-party tools. The LM3S1439-IQC50-A2 does not require external debug probes beyond standard ARM-compliant adapters.
Is the LM3S1439-IQC50-A2 pin-compatible with other Stellaris LM3S devices?
No, the LM3S1439-IQC50-A2 is not pin-compatible with other LM3S variants such as LM3S811 or LM3S3748. Its 100-pin LQFP package and specific peripheral mapping (e.g., hibernation signals, ADC channel assignment, and UART routing) are unique to the LM3S1439 family. Migration requires PCB redesign and firmware adaptation - confirmed by TI's package-specific pinout diagrams in SPMS017I Appendix A.
What analog peripherals are integrated into the LM3S1439-IQC50-A2?
The LM3S1439-IQC50-A2 integrates an 8-channel 10-bit ADC with 1 MSPS sampling rate, an analog comparator with programmable internal voltage reference, and an on-die temperature sensor. These functions are accessible through dedicated analog-capable GPIO pins (e.g., PH0–PH3) and support differential sampling, hardware averaging, and comparator-triggered interrupts - all documented in Sections 11 and 15 of the LM3S1439-IQC50-A2 datasheet.
LM3S1439-IQC50-A2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 100-LQFP
- Series:
- Stellaris® ARM® Cortex®-M3S 1000
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not 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
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
LM3S1439-IQC50-A2 FAQ
1.How can I place an order for LM3S1439-IQC50-A2 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S1439-IQC50-A2 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-A2 reliable?
The price and inventory of LM3S1439-IQC50-A2 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-A2 is usually 5 days.
3.What payment methods are accepted for LM3S1439-IQC50-A2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S1439-IQC50-A2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S1439-IQC50-A2?
LM3S1439-IQC50-A2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S1439-IQC50-A2 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-A2?
For technical support, including LM3S1439-IQC50-A2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S1439-IQC50-A2 requirements.
6.How does Aetrix verify that LM3S1439-IQC50-A2 is sourced from the original manufacturer or authorized distributors?
All LM3S1439-IQC50-A2 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-A2 meets industry standards.
7.What is the process for return or replacement of LM3S1439-IQC50-A2?
All LM3S1439-IQC50-A2 units undergo pre-shipment inspection (PSI). If there is an issue with LM3S1439-IQC50-A2, 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-A2 part is unused and in its original packaging.
Return procedure for LM3S1439-IQC50-A2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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