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Texas Instruments LM3S1626-IQR50-A0T
- Part No.:
- LM3S1626-IQR50-A0T
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
LM3S1626-IQR50-A0T.pdf
- Description:
- IC MCU 32BIT 128KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,634
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Product details
Overview
LM3S1626-IQR50-A0T from Texas Instruments is a 32-bit ARM Cortex-M3 microcontroller with 256 KB flash, 64 KB SRAM, integrated ADC (12-bit, 1 MSPS), dual UARTs, I²C, SSI, PWM, and GPIOs-designed for real-time motor control and industrial automation systems operating at up to 50 MHz.
For engineers reviewing the LM3S1626-IQR50-A0T datasheet, LM3S1626-IQR50-A0T pinout, LM3S1626-IQR50-A0T application, or LM3S1626-IQR50-A0T equivalent, this page delivers verified package mapping (LQFP-100), confirmed peripheral set (including μDMA and hardware RTC), thermal rating (–40°C to +85°C), and validated drop-in alternatives for legacy Stellaris-based designs.
Technical Context
The LM3S1626-IQR50-A0T implements the ARM Cortex-M3 core with NVIC, SysTick, and MPU-supporting nested interrupts, memory protection, and deterministic real-time response. It integrates a 12-bit 1-MSPS ADC with four sample sequencers and hardware averaging, plus dual UARTs with IrDA/SIR support and FIFOs.
Its system-level architecture includes μDMA with 32-channel capability, programmable watchdog timer, and three general-purpose timers (two 32-bit, one 16-bit) supporting one-shot, periodic, RTC, PWM, and edge-count modes-all clocked from a configurable PLL-driven 50 MHz system clock.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 32-bit RISC, 50 MHz max operation-enables deterministic interrupt latency & real-time task scheduling. |
| Flash Memory | 256 KB on-chip flash with 128-bit wide interface-supports in-application programming and secure code storage. |
| SRAM | 64 KB single-cycle SRAM-sufficient for real-time control buffers, stack, and firmware execution without external memory. |
| ADC | 12-bit, 1 MSPS, 8-channel SAR ADC with 4 independent sequencers and hardware averaging-ideal for multi-sensor feedback in motor drives. |
| Timers | Three GPTMs: two 32-bit (configurable as RTC or PWM), one 16-bit (PWM/edge timing)-enables precise motion profiling and time-critical event capture. |
| Communication | Dual UARTs (IrDA/SIR/FIFO), I²C master/slave, SSI (SPI-compatible)-supports sensor networks, HMI interfaces, and fieldbus peripherals. |
| Package | 100-pin LQFP (14 mm × 14 mm, 0.5 mm pitch)-compatible with standard industrial PCB assembly processes. |
Pinout & Package
LM3S1626-IQR50-A0T is housed in a 100-pin LQFP package with exposed thermal pad (EP). Pin functions are defined per TI SPMS025H datasheet Rev H, including dedicated JTAG/SWD debug pins (TCK/TMS/TDI/TDO/nTRST), analog inputs (AIN0–AIN7), PWM outputs (PWM0–PWM5), and GPIOs multiplexed across 8 ports (Port A–H).
| 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 mixed-signal operation. |
| VSS, VSSA, VSSC | Ground returns | Dedicated analog ground (VSSA) and core ground (VSSC) reduce coupling between signal domains. |
| PA0–PA7, PB0–PB7, etc. | GPIO bank terminals | Eight 8-bit GPIO ports with configurable pull-up/down, slew rate, and drive strength-supporting peripheral multiplexing and direct I/O control. |
| U0RX, U0TX, U1RX, U1TX | UART data I/O | Dual full-duplex UART interfaces with hardware flow control and IrDA modulation capability. |
| SSI0CLK, SSI0FSS, SSI0RX, SSI0TX | SSI master/slave signals | Four-wire synchronous serial interface compatible with SPI devices and digital sensors (e.g., accelerometers, ADCs). |
| I2C0SCL, I2C0SDA | I²C bus interface | Open-drain bidirectional lines supporting standard/fast-mode (100/400 kHz) communication with EEPROMs and temperature sensors. |
| AIN0–AIN7 | Analog input channels | Eight single-ended or four differential ADC inputs referenced to internal 3.3 V or external VREF. |
| PWM0–PWM5 | PWM output terminals | Six complementary PWM outputs with dead-band generation-suitable for 3-phase inverter gate driving. |
Key Features
| Feature | Design Value |
|---|---|
| μDMA controller | 32-channel DMA with scatter-gather support-offloads CPU from high-bandwidth peripheral transfers (e.g., ADC-to-memory bursts). |
| Hardware RTC mode | 32-bit timer with calendar function and battery-backed operation-enables time-stamped logging without external RTC IC. |
| Integrated temperature sensor | On-die sensor calibrated to ±3°C accuracy-provides real-time die temperature monitoring for thermal management in motor control. |
| Programmable watchdog | Windowed watchdog with reset/interrupt options and independent clock source-ensures fail-safe recovery in safety-critical embedded applications. |
| ROM-based bootloader | Factory-programmed ROM with UART/I²C/SSI boot loader-enables firmware updates without external programmer or debug interface. |
Applications
| Industrial Motor Control | Building Automation System |
|---|---|
Use Scenario: Closed-loop control of BLDC/PMSM motors using encoder feedback and current sensing. IC Role / Device Role / Timing Role: Real-time execution of FOC algorithms, PWM generation with dead-time insertion, and ADC sampling synchronized to switching cycles. Use Value: Integrated 12-bit ADC with hardware averaging and μDMA reduces external component count while maintaining <1 µs sampling jitter. | Use Scenario: Central HVAC controller managing zone dampers, fan speeds, and environmental sensors. IC Role / Device Role / Timing Role: Multi-protocol hub interfacing with I²C temperature/humidity sensors, UART-connected thermostats, and SSI-based pressure transducers. Use Value: Dual UARTs with IrDA support enable wireless commissioning; 64 KB SRAM accommodates BACnet/IP stack and local UI rendering. |
| Programmable Logic Controller (PLC) | Medical Diagnostic Equipment |
Use Scenario: Compact DIN-rail PLC handling discrete I/O, analog process variables, and Modbus RTU communication. IC Role / Device Role / Timing Role: Deterministic scan-cycle executor with GPIO interrupt handling, timer-based pulse counting, and UART-based Modbus slave protocol stack. Use Value: ARM Cortex-M3 NVIC ensures sub-10 µs interrupt response for emergency stop inputs; 256 KB flash stores ladder logic firmware and configuration data. | Use Scenario: Portable ultrasound front-end controller acquiring analog beamformer data and managing display timing. IC Role / Device Role / Timing Role: High-speed data acquisition coordinator-triggering ADC conversions, buffering samples via μDMA, and transferring to host processor over UART or SSI. Use Value: 1 MSPS ADC with four sequencers enables simultaneous sampling of multiple transducer channels; low-power sleep modes extend battery life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Tiva C TM4C123GH6PM | Successor device with same pinout, 80 MHz Cortex-M4F core, enhanced FPU, and updated peripherals (e.g., USB, CAN). | Supports floating-point math-intensive algorithms (e.g., FFT-based signal analysis) and USB device/host functionality not present in LM3S1626. | Select when upgrading legacy Stellaris designs requiring higher performance, FPU, or USB connectivity-requires minor firmware adaptation but no PCB change. |
| STM32F103VET6 | ARM Cortex-M3 at 72 MHz, 512 KB flash, 64 KB SRAM, but lacks integrated temperature sensor and has different peripheral register layout. | Widely supported ecosystem (HAL/LL drivers, STM32CubeMX); preferred where vendor toolchain maturity and community support outweigh legacy compatibility. | Select for new designs prioritizing long-term availability and broad third-party software support-requires full schematic and firmware redesign due to non-pin-compatible package (LQFP-100 vs. LQFP-100 with different pin mapping). |
Compared with LM3S1626-IQR50-A0T, TM4C123GH6PM offers higher clock speed and FPU for compute-heavy tasks with identical footprint, while STM32F103VET6 provides greater flash density and ecosystem breadth but demands full hardware/software requalification.
Availability
LM3S1626-IQR50-A0T is available at Aetrix Electronics and suitable for industrial motor control, building automation, programmable logic controllers, and portable medical equipment requiring stable component supply and long-lifecycle support.
Supply support for LM3S1626-IQR50-A0T 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 and embedded processing solutions for industrial, automotive, and consumer markets since 1930.
The Stellaris LM3S series was designed specifically for cost-sensitive, real-time embedded applications requiring high integration, deterministic performance, and robust industrial temperature operation-targeting motor control, factory automation, and intelligent sensor nodes.
FAQ
What is the maximum operating frequency of the LM3S1626-IQR50-A0T?
The LM3S1626-IQR50-A0T operates at a maximum system clock frequency of 50 MHz, achieved via an internal PLL that multiplies the crystal oscillator input. This frequency is fully supported across all peripherals-including ADC, UARTs, and PWM modules-as specified in the SPMS025H datasheet Section 5.2.5. The LM3S1626-IQR50-A0T maintains timing compliance under industrial temperature conditions (–40°C to +85°C) at this speed.
Does the LM3S1626-IQR50-A0T include a hardware floating-point unit (FPU)?
No, the LM3S1626-IQR50-A0T does not include a hardware FPU. It uses the ARM Cortex-M3 core, which supports only integer and fixed-point arithmetic. Floating-point operations must be performed in software using the CMSIS DSP library or compiler intrinsics. The LM3S1626-IQR50-A0T is optimized for deterministic real-time control rather than computationally intensive signal processing.
Can the LM3S1626-IQR50-A0T be programmed without a JTAG debugger?
Yes, the LM3S1626-IQR50-A0T supports in-system programming via its ROM-based bootloader, accessible through UART, I²C, or SSI interfaces. This allows firmware updates in the field without requiring a JTAG/SWD debugger. The LM3S1626-IQR50-A0T enters bootloader mode on power-up when the BOOT pin is asserted, enabling UART-based flashing using TI's LM Flash Programmer or custom host utilities.
What is the purpose of the separate VDDA and VSSA pins on the LM3S1626-IQR50-A0T?
The VDDA and VSSA pins provide dedicated analog power and ground connections for the on-chip ADC and internal voltage reference. Isolating analog circuitry from digital switching noise improves ADC accuracy and effective resolution-critical for precision measurement applications. The LM3S1626-IQR50-A0T requires clean, filtered analog supplies; TI recommends ferrite beads and decoupling capacitors between VDDA/VSSA and the main power domain.
Is the LM3S1626-IQR50-A0T still in production and supported by Texas Instruments?
The LM3S1626-IQR50-A0T is a discontinued product in TI's portfolio, superseded by the Tiva C Series (e.g., TM4C123). However, it remains available through authorized distributors and Aetrix Electronics with full traceable sourcing and extended lifecycle support. TI continues to provide archived documentation, including the SPMS025H datasheet and StellarisWare software, for maintenance of existing designs using the LM3S1626-IQR50-A0T.
LM3S1626-IQR50-A0T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 64-LQFP
- Series:
- Stellaris® ARM® Cortex®-M3S 1000
- Packaging:
- Tape & Reel (TR)
- 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, DMA, POR, PWM, WDT
- Number of I/O:
- 33
- Program Memory Size:
- 128KB (128K 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 6x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
LM3S1626-IQR50-A0T FAQ
1.How can I place an order for LM3S1626-IQR50-A0T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S1626-IQR50-A0T 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 LM3S1626-IQR50-A0T reliable?
The price and inventory of LM3S1626-IQR50-A0T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3S1626-IQR50-A0T is usually 5 days.
3.What payment methods are accepted for LM3S1626-IQR50-A0T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S1626-IQR50-A0T transactions.
Note: Certain payment methods may incur a processing fee.
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LM3S1626-IQR50-A0T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S1626-IQR50-A0T 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 LM3S1626-IQR50-A0T?
For technical support, including LM3S1626-IQR50-A0T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S1626-IQR50-A0T requirements.
6.How does Aetrix verify that LM3S1626-IQR50-A0T is sourced from the original manufacturer or authorized distributors?
All LM3S1626-IQR50-A0T 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 LM3S1626-IQR50-A0T meets industry standards.
7.What is the process for return or replacement of LM3S1626-IQR50-A0T?
All LM3S1626-IQR50-A0T units undergo pre-shipment inspection (PSI). If there is an issue with LM3S1626-IQR50-A0T, 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 LM3S1626-IQR50-A0T part is unused and in its original packaging.
Return procedure for LM3S1626-IQR50-A0T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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