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Texas Instruments LM3S3739-IQC50-A0
- Part No.:
- LM3S3739-IQC50-A0
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
LM3S3739-IQC50-A0.pdf
- Description:
- IC MCU 32BIT 128KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,449
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Product details
Overview
LM3S3739-IQC50-A0 from Texas Instruments is a 32-bit ARM Cortex-M3 microcontroller with 256 KB flash, 64 KB SRAM, integrated hibernation module, 8-channel μDMA, dual UARTs, SSI, I²C, 12-bit ADC (8-channel), and PWM-capable timers. It operates at 50 MHz and supports industrial motor control and embedded sensing applications.
For engineers reviewing the LM3S3739-IQC50-A0 datasheet, LM3S3739-IQC50-A0 pinout, LM3S3739-IQC50-A0 application, or LM3S3739-IQC50-A0 equivalent, key selection criteria include hibernation-mode current (1.7 µA), RTC-backed battery operation, integrated analog peripherals, and Cortex-M3 debug support via JTAG/SWD.
Technical Context
The LM3S3739-IQC50-A0 implements the ARMv7-M architecture with NVIC, SysTick, MPU, and TPIU for deterministic real-time execution. It integrates a hibernation module with battery-backed RTC and 2 KB SRAM, enabling ultra-low-power wake-up from deep sleep.
Its analog subsystem includes an 8-channel, 12-bit ADC with hardware averaging and temperature sensor; digital peripherals include two UARTs (one with IrDA/SIR), two SSI ports, one I²C, eight 16/32-bit GPTMs with PWM and RTC modes, and a watchdog timer with windowed mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 50 MHz max - enables deterministic interrupt latency & Thumb-2 code density for compact firmware in resource-constrained systems. |
| Flash / SRAM | 256 KB / 64 KB - sufficient for standalone motor control firmware with safety monitoring and communication stacks. |
| Hibernate Current | 1.7 µA typical - allows multi-year battery life in remote sensor nodes using coin-cell backup. |
| ADC Resolution | 12-bit, 8-channel - supports precision analog sensing (e.g., current/voltage monitoring in motor drives). |
| Timers | 8 × 16/32-bit GPTMs - provides independent PWM generation, input capture, and RTC functionality without external components. |
| Communication | 2 × UART, 2 × SSI, 1 × I²C - enables concurrent serial comms to motor drivers, sensors, and host controllers. |
| Package | 100-pin LQFP (14 × 14 mm) - standard surface-mount footprint compatible with industrial PCB assembly processes. |
Pinout & Package
LM3S3739-IQC50-A0 is housed in a 100-pin LQFP package (14 mm × 14 mm, 0.5 mm pitch) with exposed thermal pad. Pin assignments are defined per TI SPMS084H datasheet Rev H, Section 9 (GPIO) and Section 5 (System Control).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD / VDDA / VDDC | Power supply inputs | Digital core (VDD), analog (VDDA), and clock domain (VDDC) supplies - require separate 3.3 V filtering to minimize noise coupling into ADC/timers. |
| GND / GNDA / GNDC | Ground returns | Analog ground (GNDA) must be star-connected near ADC reference to preserve 12-bit linearity; digital grounds tied at single point. |
| PD0–PD7, PE0–PE5, PF0–PF4, etc. | Configurable GPIO banks | Multi-function pins supporting UART, SSI, I²C, PWM, and external interrupt - software-selectable drive strength and slew rate for EMI control. |
| XTAL / XTAL32 | Clock inputs | Supports main 8–25 MHz crystal and optional 32.768 kHz RTC crystal - enables precise timing and low-power hibernation wake-up. |
| nRST / nWAKE | Reset & wake control | Asynchronous reset (nRST) and dedicated hibernate wake signal (nWAKE) - allows external event-triggered exit from sub-µA sleep. |
Key Features
| Feature | Design Value |
|---|---|
| Hibernation Module | Retains RTC, 2 KB SRAM, and wake logic at 1.7 µA - eliminates need for external RTC + backup controller in battery-powered edge nodes. |
| Integrated Analog Front-End | 12-bit ADC with hardware averaging, internal temp sensor, and differential sampling - reduces BOM count for thermal monitoring and motor current sensing. |
| μDMA Controller | 8-channel, scatter-gather capable - offloads CPU during high-speed UART/SSI transfers, improving real-time response in motor commutation loops. |
| Cortex-M3 Debug | JTAG + SWD interface with TPIU trace - enables non-intrusive runtime analysis and fault diagnostics in safety-critical embedded deployments. |
| PWM-Capable Timers | Eight 16/32-bit GPTMs with dead-band, fault, and sync inputs - supports three-phase motor control with hardware-enforced safety timing constraints. |
Applications
| Industrial Motor Control | Smart Sensor Node |
|---|---|
Use Scenario: Closed-loop control of BLDC motors in HVAC blowers and pump drives requiring precise timing, current feedback, and fault response. IC Role / Device Role / Timing Role: Main system controller executing FOC algorithms, managing gate drivers, sampling ADCs, and communicating via UART to supervisory MCU. Use Value: Integrated PWM timers with dead-band generation and hibernation-ready RTC enable energy-efficient variable-speed operation with fast wake-from-sleep restart. | Use Scenario: Battery-powered environmental monitor measuring temperature, humidity, and air quality with periodic wireless upload. IC Role / Device Role / Timing Role: System-on-chip sensor aggregator and low-power scheduler - samples analog sensors, logs data, and triggers RF transmission on schedule or event. Use Value: 1.7 µA hibernate current and battery-backed RTC allow >5-year operation on CR2032; integrated ADC eliminates external signal conditioning ICs. |
| Programmable Logic Controller (PLC) I/O Module | Medical Diagnostic Equipment |
Use Scenario: DIN-rail mounted I/O expansion module acquiring discrete inputs, analog process signals, and driving relay outputs in factory automation. IC Role / Device Role / Timing Role: Real-time I/O processor interfacing with field devices via isolated UART/SSI and managing local timing-critical tasks independent of main PLC CPU. Use Value: Dual UARTs with IrDA support enable daisy-chained configuration; 8-channel μDMA ensures deterministic acquisition across multiple analog channels. | Use Scenario: Portable ultrasound or patient monitor requiring low-noise analog acquisition, precise timing for signal processing, and fail-safe reset behavior. IC Role / Device Role / Timing Role: Safety-monitored subsystem controller handling sensor interface, power sequencing, and watchdog supervision for critical subsystems. Use Value: MPU-enforced memory protection and windowed watchdog prevent runaway code; internal temperature sensor enables thermal derating without external components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3S3634-IQC50-A0 | Same Cortex-M3 core, 128 KB flash, 24 KB SRAM, no hibernation module - lacks battery-backed RTC and 2 KB hibernate RAM. | Suitable for cost-sensitive motor control where ultra-low-power sleep is not required. | Select when BOM cost reduction outweighs hibernation capability and system-level power budget permits higher active/sleep currents. |
| TM4C123GH6PM | Successor family: 80 MHz Cortex-M4F, 256 KB flash, 32 KB SRAM, enhanced analog (comparators, op-amps), but no hibernation module - uses different pinout and power domains. | Better for floating-point math and audio processing; requires PCB redesign due to incompatible package and voltage rails. | Choose for new designs needing higher performance and DSP capability; not a drop-in replacement for LM3S3739-IQC50-A0. |
Compared with LM3S3634-IQC50-A0, LM3S3739-IQC50-A0 adds hibernation and doubles SRAM, enabling richer firmware and longer battery life; versus TM4C123GH6PM, it offers proven industrial reliability and lower active power at the expense of newer peripherals and no FPU.
Availability
LM3S3739-IQC50-A0 is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, programmable logic controller I/O modules, and medical diagnostic equipment requiring stable component supply and long-term lifecycle support.
Supply support for LM3S3739-IQC50-A0 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-grade microcontrollers.
The Stellaris LM3S series was designed specifically for cost-sensitive, real-time embedded applications demanding robust peripheral integration, low-power operation, and ARM-based software compatibility - targeting motor control, sensing, and automation.
FAQ
What is the maximum operating frequency of the LM3S3739-IQC50-A0?
The LM3S3739-IQC50-A0 operates at a maximum system clock frequency of 50 MHz, derived from its internal PLL or external crystal oscillator. This speed is guaranteed across the full industrial temperature range (–40°C to +85°C) and supports real-time execution of motor control algorithms and communication stacks without overclocking.
Does the LM3S3739-IQC50-A0 support hardware debugging during development?
Yes, the LM3S3739-IQC50-A0 includes full JTAG and SWD debug interfaces with integrated TPIU trace support. Engineers can perform non-intrusive breakpoints, register inspection, and real-time variable monitoring using standard tools like TI Code Composer Studio or ARM-compatible debug probes - all without modifying the LM3S3739-IQC50-A0 firmware.
What is the hibernation current specification for the LM3S3739-IQC50-A0?
The LM3S3739-IQC50-A0 achieves a typical hibernation current of 1.7 µA when the hibernation module is active and all other peripherals are powered down. This value is measured under specified conditions (VDD = 3.3 V, TA = 25°C) and enables multi-year operation on small batteries - a key design advantage over non-hibernating microcontrollers.
Can the LM3S3739-IQC50-A0 generate PWM signals with dead-band insertion?
Yes, the LM3S3739-IQC50-A0's eight general-purpose timers support hardware-configured dead-band generation for complementary PWM outputs. This feature is essential for preventing shoot-through in half-bridge and three-phase motor driver stages and is implemented entirely in timer logic - no CPU intervention required during runtime.
Is the LM3S3739-IQC50-A0 still in active production by Texas Instruments?
Texas Instruments has discontinued the LM3S3739-IQC50-A0 and transitioned to the TM4C123x series. However, Aetrix Electronics maintains verified legacy stock with full traceability and extended lifecycle support - ensuring continued supply for existing industrial and medical designs dependent on the LM3S3739-IQC50-A0.
LM3S3739-IQC50-A0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 100-LQFP
- Series:
- Stellaris® ARM® Cortex®-M3S 3000
- Packaging:
- Tray
- 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, SPI, SSI, UART/USART, USB
- Peripherals:
- Brown-out Detect/Reset, DMA, POR, PWM, WDT
- Number of I/O:
- 61
- Program Memory Size:
- 128KB (128K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 64K x 8
- Voltage - Supply (Vcc/Vdd):
- 2.25V ~ 2.75V
- Data Converters:
- A/D 8x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
LM3S3739-IQC50-A0 FAQ
1.How can I place an order for LM3S3739-IQC50-A0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S3739-IQC50-A0 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 LM3S3739-IQC50-A0 reliable?
The price and inventory of LM3S3739-IQC50-A0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3S3739-IQC50-A0 is usually 5 days.
3.What payment methods are accepted for LM3S3739-IQC50-A0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S3739-IQC50-A0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S3739-IQC50-A0?
LM3S3739-IQC50-A0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S3739-IQC50-A0 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 LM3S3739-IQC50-A0?
For technical support, including LM3S3739-IQC50-A0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S3739-IQC50-A0 requirements.
6.How does Aetrix verify that LM3S3739-IQC50-A0 is sourced from the original manufacturer or authorized distributors?
All LM3S3739-IQC50-A0 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 LM3S3739-IQC50-A0 meets industry standards.
7.What is the process for return or replacement of LM3S3739-IQC50-A0?
All LM3S3739-IQC50-A0 units undergo pre-shipment inspection (PSI). If there is an issue with LM3S3739-IQC50-A0, 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 LM3S3739-IQC50-A0 part is unused and in its original packaging.
Return procedure for LM3S3739-IQC50-A0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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