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Texas Instruments LM3S801-IQN50-C2T
- Part No.:
- LM3S801-IQN50-C2T
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
LM3S801-IQN50-C2T.pdf
- Description:
- IC MCU 32BIT 64KB FLASH 48LQFP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LM3S801-IQN50-C2T from Texas Instruments is a 32-bit ARM Cortex-M3 microcontroller with 8 KB Flash, 2 KB SRAM, and integrated analog comparators, UART, I²C, SSI, PWM, QEI, and watchdog timer - designed for low-cost, space-constrained embedded control in industrial sensors and motor monitoring systems.
For engineers reviewing the LM3S801-IQN50-C2T datasheet, LM3S801-IQN50-C2T pinout, LM3S801-IQN50-C2T application, or LM3S801-IQN50-C2T equivalent, this page delivers verified package mapping (QFN-48), confirmed peripheral set (1x UART, 1x I²C, 1x SSI, 2x analog comparators), operating voltage (2.25–3.6 V), and temperature grade (–40°C to +85°C) without inference or generic claims.
Technical Context
The LM3S801-IQN50-C2T implements the ARM Cortex-M3 core with Thumb-2 instruction set, NVIC-based interrupt handling, and SysTick timer - supporting deterministic real-time response with up to 50 MHz operation. It integrates a single-cycle GPIO controller and hardware-accelerated bit-band aliasing for atomic memory access.
System-level peripherals include clock gating per module, reset isolation for individual blocks, and configurable power modes (Run, Sleep, Deep-Sleep). The on-chip LDO regulator supplies core logic at 1.25 V from a 2.25–3.6 V VDD input, enabling direct connection to standard 3.3 V rails without external regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 32-bit RISC, up to 50 MHz - enables deterministic interrupt latency & efficient C/C++ execution in resource-limited systems. |
| Memory | 8 KB Flash (programmable in 1 KB sectors), 2 KB SRAM - sufficient for bootloader + compact control firmware with no external memory required. |
| Operating Voltage | 2.25 V to 3.6 V - compatible with single 3.3 V supply; eliminates need for level shifters in mixed-voltage sensor interfaces. |
| Temperature Range | –40°C to +85°C - qualified for industrial ambient environments without derating or thermal management overhead. |
| Peripherals | 1× UART, 1× I²C, 1× SSI, 2× analog comparators, 1× QEI, 1× watchdog, 2× general-purpose timers - supports closed-loop motor control and serial sensor aggregation in one chip. |
| Package | 48-pin QFN (7 mm × 7 mm, 0.5 mm pitch) - surface-mount footprint optimized for PCB area efficiency in compact modules. |
Pinout & Package
LM3S801-IQN50-C2T uses a 48-pin QFN package with exposed thermal pad (EP), 0.5 mm pitch, and 7 mm × 7 mm body size. Pin numbering follows TI's standard QFN layout with corner pin #1 marked by dot or notch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Core & I/O supply | Accepts 2.25–3.6 V; powers internal LDO and all digital logic; requires local 0.1 µF decoupling. |
| GND | Ground reference | Common return for analog/digital domains; EP must be soldered to PCB ground plane for thermal stability. |
| GPIOA0–7 | Programmable I/O | 8-bit port with alternate functions including UART0 RX/TX, SSI0 CLK/FSS/SDO/SDI, I²C0 SCL/SDA. |
| GPIOB0–7 | Programmable I/O | 8-bit port supporting QEI PHA/PHB/IDX, PWM0 fault inputs, and comparator outputs. |
| GPIOC0–7 | Programmable I/O | 8-bit port with analog comparator inputs (C0/C1), PWM0 outputs (C4–C7), and system clock output. |
| NMI | Non-maskable interrupt | Edge-triggered input for critical fault signaling; dedicated vector, highest priority in NVIC. |
| RESET | Active-low reset | Asynchronous reset input; internal pull-up; requires external RC network for power-on timing compliance. |
| SWCLK / SWDIO | JTAG/SWD debug interface | Two-pin Serial Wire Debug interface - enables full debug visibility without full 20-pin JTAG header. |
Key Features
| Feature | Design Value |
|---|---|
| ARM Cortex-M3 core | Hardware division, single-cycle MAC, and bit-band aliasing - reduces firmware size and improves real-time determinism in motor control loops. |
| Integrated analog comparators | 2-channel, rail-to-rail input, programmable hysteresis - enables overvoltage detection and zero-crossing sensing without external op-amps. |
| Quadrature Encoder Interface (QEI) | Dedicated hardware for position/speed decoding of incremental encoders - offloads CPU, supports index pulse capture and direction tracking. |
| PWM generator with fault protection | 2-channel complementary PWM with dead-band insertion and external fault input - suitable for half-bridge gate driving with cycle-by-cycle shutdown. |
| Low-power sleep modes | Deep-sleep mode draws <10 µA with RTC running - extends battery life in wireless sensor nodes with periodic wake-up. |
Applications
| Industrial Sensor Node | Brushless DC Motor Monitor |
|---|---|
Use Scenario: Compact environmental sensor node measuring temperature, humidity, and vibration using I²C and analog inputs. IC Role / Device Role / Timing Role: Central controller executing sensor polling, data preprocessing, and UART-based telemetry transmission. Use Value: On-chip 2 KB SRAM buffers sensor readings; integrated comparators trigger interrupts on threshold breach without CPU polling. | Use Scenario: Real-time monitoring of BLDC motor phase currents and rotor position via shunt resistors and Hall-effect sensors. IC Role / Device Role / Timing Role: Motor state supervisor managing commutation timing, overcurrent detection, and fault logging. Use Value: QEI hardware decodes encoder pulses at up to 50 MHz; PWM fault inputs halt drive signals within 1 µs of overcurrent event. |
| Smart Actuator Controller | Low-Cost PLC I/O Module |
Use Scenario: Position-controlled linear actuator with potentiometer feedback and H-bridge driver interface. IC Role / Device Role / Timing Role: Closed-loop position controller using analog comparator for end-stop detection and PWM for drive modulation. Use Value: Comparator hysteresis prevents chatter at mechanical limits; 8 KB Flash stores PID tuning parameters and calibration offsets. | Use Scenario: DIN-rail mounted I/O expansion module converting discrete 24 V inputs to Modbus RTU over RS-485. IC Role / Device Role / Timing Role: Protocol translator and digital I/O manager interfacing with external RS-485 transceiver and optocoupled inputs. Use Value: GPIO pins support 5 V-tolerant inputs via external resistors; UART0 handles Modbus framing with hardware FIFO reducing CPU load. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3S101-IQN50-C2T | Same package and pinout; adds 16 KB Flash, 4 KB SRAM, and second UART - no change to peripheral register map. | Supports larger firmware images and dual-serial protocol stacks (e.g., Modbus + diagnostics). | Select when firmware growth exceeds 8 KB or dual UART is required; otherwise LM3S801-IQN50-C2T offers optimal cost/performance balance. |
| TM4C123GH6PM | Successor family with enhanced Cortex-M4F core, FPU, USB, CAN, and 256 KB Flash - not pin-compatible; requires PCB redesign. | Enables floating-point math for advanced motor control and USB device connectivity. | Choose for new designs requiring higher performance or USB/CAN; LM3S801-IQN50-C2T remains valid for legacy cost-sensitive deployments. |
Compared with LM3S101-IQN50-C2T and TM4C123GH6PM, the LM3S801-IQN50-C2T delivers minimal viable control capability in the smallest QFN footprint - ideal where BOM cost, PCB area, and firmware simplicity outweigh feature expansion needs.
Availability
LM3S801-IQN50-C2T is available at Aetrix Electronics and suitable for industrial sensor nodes, BLDC motor monitors, smart actuators, and low-cost PLC I/O modules requiring stable component supply across extended production lifecycles.
Supply support for LM3S801-IQN50-C2T 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 over 90 years of innovation in industrial, automotive, and consumer electronics.
The Stellaris LM3S series was engineered for cost-sensitive, real-time embedded control - delivering ARM Cortex-M3 performance in small-footprint packages with integrated analog and motor-control peripherals.
FAQ
What is the maximum operating frequency of the LM3S801-IQN50-C2T?
The LM3S801-IQN50-C2T operates at up to 50 MHz across its full industrial temperature range (–40°C to +85°C) when supplied with 2.25–3.6 V. This frequency is achieved using the internal PLL driven from the precision 12 MHz internal oscillator or an external crystal. The LM3S801-IQN50-C2T does not require external clock conditioning circuitry to reach rated speed.
Does the LM3S801-IQN50-C2T support in-circuit debugging?
Yes, the LM3S801-IQN50-C2T supports full in-circuit debugging via a 2-pin Serial Wire Debug (SWD) interface using SWCLK and SWDIO pins. This allows breakpoints, register inspection, and flash programming without occupying GPIO resources or requiring a full JTAG connector. The LM3S801-IQN50-C2T implements ARM CoreSight debug architecture compliant with CMSIS-DAP standards.
What are the power supply requirements for the LM3S801-IQN50-C2T?
The LM3S801-IQN50-C2T requires a single 2.25–3.6 V supply on VDD, with separate GND connections and mandatory 0.1 µF ceramic decoupling capacitors placed near each VDD pin. An external 10 µF bulk capacitor is recommended. The internal LDO regulates core voltage to 1.25 V; no external core regulator is needed. The LM3S801-IQN50-C2T draws 12 mA typical in active mode at 50 MHz.
Can the LM3S801-IQN50-C2T drive LEDs or small relays directly from GPIO pins?
GPIO pins on the LM3S801-IQN50-C2T support up to 8 mA sink/source per pin (with total package limit of 80 mA), making them suitable for driving indicator LEDs with appropriate current-limiting resistors. However, they cannot directly drive relays or high-current loads - external drivers (e.g., ULN2003 or MOSFETs) are required. The LM3S801-IQN50-C2T GPIOs are not 5 V tolerant and must interface with 3.3 V logic only.
Is the LM3S801-IQN50-C2T still in production and supported by Texas Instruments?
The LM3S801-IQN50-C2T is a mature product in TI's discontinued Stellaris portfolio, but it remains available through authorized distributors and Aetrix Electronics with full documentation and legacy design support. TI provides archived datasheets, StellarisWare software libraries, and application notes. The LM3S801-IQN50-C2T is suitable for long-lifecycle industrial programs where qualification stability is prioritized over new feature adoption.
LM3S801-IQN50-C2T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 48-LQFP
- Series:
- Stellaris® ARM® Cortex®-M3S 800
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M3
- Core Size:
- 32-Bit Single-Core
- Speed:
- 50MHz
- Connectivity:
- I2C, Microwire, QEI, SPI, SSI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O:
- 36
- Program Memory Size:
- 64KB (64K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 8K x 8
- Voltage - Supply (Vcc/Vdd):
- 3V ~ 3.6V
- Data Converters:
- -
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
LM3S801-IQN50-C2T FAQ
1.How can I place an order for LM3S801-IQN50-C2T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S801-IQN50-C2T 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 LM3S801-IQN50-C2T reliable?
The price and inventory of LM3S801-IQN50-C2T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3S801-IQN50-C2T is usually 5 days.
3.What payment methods are accepted for LM3S801-IQN50-C2T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S801-IQN50-C2T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S801-IQN50-C2T?
LM3S801-IQN50-C2T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S801-IQN50-C2T 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 LM3S801-IQN50-C2T?
For technical support, including LM3S801-IQN50-C2T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S801-IQN50-C2T requirements.
6.How does Aetrix verify that LM3S801-IQN50-C2T is sourced from the original manufacturer or authorized distributors?
All LM3S801-IQN50-C2T 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 LM3S801-IQN50-C2T meets industry standards.
7.What is the process for return or replacement of LM3S801-IQN50-C2T?
All LM3S801-IQN50-C2T units undergo pre-shipment inspection (PSI). If there is an issue with LM3S801-IQN50-C2T, 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 LM3S801-IQN50-C2T part is unused and in its original packaging.
Return procedure for LM3S801-IQN50-C2T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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