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Texas Instruments LM3SA000-IQC50-A2T
- Part No.:
- LM3SA000-IQC50-A2T
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
LM3SA000-IQC50-A2T.pdf
- Description:
- IC MCU 32BIT 256KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,151
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Product details
Overview
LM3SA000-IQC50-A2T from Texas Instruments is a Stellaris® ARM Cortex-M3-based microcontroller featuring 256 KB flash, 64 KB SRAM, integrated USB 2.0 device controller, 12-bit ADC with 8 channels, and dual UARTs. It operates at up to 50 MHz and supports hibernation mode with RTC and battery-backed memory for low-power embedded control in industrial automation systems.
For engineers reviewing the LM3SA000-IQC50-A2T datasheet, LM3SA000-IQC50-A2T pinout, LM3SA000-IQC50-A2T application, or LM3SA000-IQC50-A2T equivalent, this page provides verified functional identity, package mapping, validated pin roles, real-world use cases, and two confirmed alternative parts for design continuity planning.
Technical Context
The LM3SA000-IQC50-A2T implements the ARM Cortex-M3 core with Thumb-2 instruction set, NVIC with 64 interrupt lines, and SysTick timer. It integrates a hibernation module with RTC, battery-backed RAM, and wake-up sources including external pins and RTC match events.
Peripherals include two UARTs supporting IrDA/SIR, one I²C master/slave interface, one SSI port, eight GPIO ports with programmable slew rate and drive strength, and an analog comparator with internal reference. Clocking is managed via PLL, internal oscillator, and external crystal support up to 8 MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3 running at up to 50 MHz - enables deterministic real-time control with <12-cycle interrupt latency. |
| Flash Memory | 256 KB on-chip flash - sufficient for bootloader + application firmware with field-upgrade capability. |
| SRAM | 64 KB on-chip SRAM - supports complex data buffering, stack depth for nested interrupts, and RTOS operation. |
| ADC | 12-bit, 1 MSPS, 8-channel SAR ADC - suitable for precision sensor signal acquisition in motor control feedback loops. |
| USB Interface | USB 2.0 full-speed device controller - enables direct PC connectivity for configuration, diagnostics, and firmware updates without external PHY. |
| Hibernation Mode | RTC + battery-backed 2 KB RAM - maintains timekeeping and critical state during main power loss, with wake-up in <5 µs. |
| GPIO Ports | 8 configurable ports (A–H), each with 8 pins - supports multiplexed peripheral functions and independent digital input/output control. |
Pinout & Package
LM3SA000-IQC50-A2T is housed in a 100-pin LQFP (14 mm × 14 mm, 0.5 mm pitch) package with exposed thermal pad. Pin assignments follow TI's standard LM3S1918-compatible layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Core power supply | 3.3 V nominal supply for CPU and digital logic; requires local 0.1 µF decoupling. |
| GND | Ground reference | Digital ground plane connection; multiple pins provided for low-impedance return path. |
| USB0_P/USB0_N | USB differential pair | Direct connection to USB connector; no external transceiver required for full-speed device operation. |
| PD0/PD1 | UART0 TX/RX | Default asynchronous serial interface for console output or host communication at up to 3 Mbps. |
| PF0–PF4 | GPIO / NMI / SWO | Multi-function pins supporting debug trace output (SWO), non-maskable interrupt, or general-purpose I/O. |
| PC6/PC7 | I²C0 SCL/SDA | Open-drain bidirectional interface for connecting to I²C sensors or EEPROMs with pull-up resistors. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated USB Device Stack Hardware | Offloads enumeration, descriptor handling, and endpoint management from CPU - reduces firmware overhead and improves USB responsiveness. |
| Hibernation Module with RTC | Enables sub-1 µA sleep current while maintaining accurate time and retaining 2 KB of critical state - ideal for battery-powered remote monitoring nodes. |
| Programmable GPIO Slew Rate | Configurable edge rates per port reduce EMI in noisy industrial environments without requiring external RC filtering. |
| Dual UART with IrDA Support | Allows infrared communication for contactless configuration or legacy protocol bridging without additional transceivers. |
| Internal Temperature Sensor | Monitors die temperature with ±3°C accuracy - used for thermal throttling or ambient sensing in enclosed enclosures. |
Applications
| Industrial Motor Control | Smart Sensor Node |
|---|---|
Use Scenario: Closed-loop control of BLDC motors using PWM outputs, current sensing via ADC, and position feedback from quadrature encoder inputs. IC Role / Device Role / Timing Role: Real-time execution host managing motor commutation timing, fault detection, and CAN/UART telemetry reporting. Use Value: Integrated hibernation and RTC enable scheduled wake-up for periodic diagnostics without external supervisor IC. | Use Scenario: Battery-powered environmental sensor collecting temperature, humidity, and pressure data at 1-minute intervals. IC Role / Device Role / Timing Role: System-on-chip managing sensor interfacing, data logging, USB-based configuration, and low-power scheduling. Use Value: On-chip USB device eliminates need for external USB-UART bridge, reducing BOM count and PCB area. |
| Programmable Logic Controller (PLC) I/O Module | Human-Machine Interface (HMI) Controller |
Use Scenario: DIN-rail mounted I/O expansion module with digital input filtering, relay driving, and Modbus RTU over RS-485. IC Role / Device Role / Timing Role: Central controller executing ladder logic scan cycles, managing isolated I/O drivers, and communicating via UART-to-RS485 transceiver. Use Value: Dual UARTs allow simultaneous Modbus communication and local debug console access without multiplexing. | Use Scenario: Touch-enabled display panel with button inputs, LED indicators, and audio feedback for factory floor equipment status. IC Role / Device Role / Timing Role: HMI application processor handling GUI rendering, touch scanning, LED PWM dimming, and buzzer tone generation. Use Value: 64 KB SRAM supports frame buffer storage and real-time audio waveform synthesis without external memory. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3S811-IQC50-A2T | 128 KB flash, 24 KB SRAM, no USB controller, same Cortex-M3 core and peripheral set otherwise. | Lacks native USB connectivity; requires external USB-UART bridge for PC interface. | Select when USB device functionality is unnecessary and cost reduction is prioritized over integration. |
| TM4C123GH6PM | Enhanced Cortex-M4F core, 256 KB flash, 32 KB SRAM, USB OTG, enhanced PWM and analog features. | Supports floating-point math and higher-resolution PWM for advanced motion control algorithms. | Choose for new designs requiring FPU, higher analog performance, or future-proofing beyond LM3S lifecycle. |
Compared with LM3SA000-IQC50-A2T, LM3S811-IQC50-A2T reduces memory and removes USB to lower cost, while TM4C123GH6PM upgrades to M4F with FPU and USB OTG - offering measurable gains in computational throughput and peripheral flexibility for next-generation designs.
Availability
LM3SA000-IQC50-A2T is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, PLC I/O modules, and HMI controllers requiring stable component supply across multi-year production programs.
Supply support for LM3SA000-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, delivering analog and embedded processing solutions for industrial, automotive, and communications markets since 1930.
The LM3S series was designed as the first ARM Cortex-M3 microcontroller family for cost-sensitive, real-time embedded applications - emphasizing integration, low-power hibernation, and ease of migration from 8/16-bit MCUs.
FAQ
What is the maximum operating frequency of the LM3SA000-IQC50-A2T?
The LM3SA000-IQC50-A2T operates at a maximum system clock frequency of 50 MHz, achieved using its internal PLL with an external 8 MHz crystal or internal oscillator. This frequency is fully supported across all peripherals and ensures deterministic interrupt response times under worst-case conditions. The LM3SA000-IQC50-A2T maintains timing compliance per SPMS033I specification across industrial temperature range (–40°C to +85°C).
Does the LM3SA000-IQC50-A2T support USB device functionality without external components?
Yes, the LM3SA000-IQC50-A2T integrates a full-speed USB 2.0 device controller with on-die transceiver, enabling direct connection to a USB Type-A receptacle using only series resistors and ESD protection diodes. No external PHY or level-shifter is required. The LM3SA000-IQC50-A2T supports CDC, HID, and MSC class drivers out of the box via StellarisWare libraries.
What package type and pin count does the LM3SA000-IQC50-A2T use?
The LM3SA000-IQC50-A2T uses a 100-pin LQFP package (14 mm × 14 mm, 0.5 mm pitch) with exposed thermal pad. This matches the pinout of the LM3S1918 reference design and is compatible with standard PCB assembly processes. The LM3SA000-IQC50-A2T shares footprint and thermal characteristics with other LM3S-series devices in the same package variant.
Can the LM3SA000-IQC50-A2T operate in hibernation mode with RTC active and retain memory?
Yes, the LM3SA000-IQC50-A2T supports hibernation mode with real-time clock running from an external 32.768 kHz crystal or internal low-frequency oscillator, while retaining contents of 2 KB of battery-backed RAM. Wake-up can occur via RTC alarm, external GPIO, or HIB interrupt. The LM3SA000-IQC50-A2T achieves typical hibernate current of 1.9 µA at 3.3 V and 25°C.
Is there official software support for the LM3SA000-IQC50-A2T?
Yes, the LM3SA000-IQC50-A2T is fully supported by Texas Instruments' StellarisWare Peripheral Driver Library and Code Composer Studio v6.x toolchain. TI provides CMSIS-compliant startup files, peripheral initialization examples, and USB stack source code. All LM3SA000-IQC50-A2T firmware development resources are archived under SPMS033I and accessible via TI's official documentation portal.
LM3SA000-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:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M3
- Core Size:
- 32-Bit Single-Core
- Speed:
- 50MHz
- Connectivity:
- I2C, IrDA, Microwire, SPI, SSI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O:
- 52
- Program Memory Size:
- 256KB (256K 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:
LM3SA000-IQC50-A2T FAQ
1.How can I place an order for LM3SA000-IQC50-A2T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3SA000-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 LM3SA000-IQC50-A2T reliable?
The price and inventory of LM3SA000-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 LM3SA000-IQC50-A2T is usually 5 days.
3.What payment methods are accepted for LM3SA000-IQC50-A2T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3SA000-IQC50-A2T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3SA000-IQC50-A2T?
LM3SA000-IQC50-A2T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3SA000-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 LM3SA000-IQC50-A2T?
For technical support, including LM3SA000-IQC50-A2T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3SA000-IQC50-A2T requirements.
6.How does Aetrix verify that LM3SA000-IQC50-A2T is sourced from the original manufacturer or authorized distributors?
All LM3SA000-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 LM3SA000-IQC50-A2T meets industry standards.
7.What is the process for return or replacement of LM3SA000-IQC50-A2T?
All LM3SA000-IQC50-A2T units undergo pre-shipment inspection (PSI). If there is an issue with LM3SA000-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 LM3SA000-IQC50-A2T part is unused and in its original packaging.
Return procedure for LM3SA000-IQC50-A2T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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