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Texas Instruments LM3S811-EGZ50-C2T
- Part No.:
- LM3S811-EGZ50-C2T
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
LM3S811-EGZ50-C2T.pdf
- Description:
- IC MCU 32BIT 64KB FLASH 48VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,134
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Product details
Overview
LM3S811-EGZ50-C2T from Texas Instruments is a 32-bit ARM Cortex-M3 microcontroller with 64 KB flash, 24 KB SRAM, integrated ADC (10-bit, 8-channel), UART, I²C, SSI, PWM, and analog comparator. It operates at up to 50 MHz and supports industrial temperature range (–40°C to +105°C) in a 100-pin LQFP package. Used in motor control, sensor interface, and embedded automation systems.
For engineers reviewing the LM3S811-EGZ50-C2T datasheet, LM3S811-EGZ50-C2T pinout, LM3S811-EGZ50-C2T application, or LM3S811-EGZ50-C2T equivalent, key selection criteria include Cortex-M3 core performance, on-chip analog peripherals, industrial-grade thermal rating, and legacy StellarisWare software support for rapid firmware development.
Technical Context
The LM3S811-EGZ50-C2T implements the ARMv7-M architecture with Thumb-2 instruction set, NVIC supporting 32 interrupt lines, and SysTick timer. It integrates a 10-bit 1-MSPS ADC with hardware averaging and internal temperature sensor, plus dual PWM modules with dead-band generation for motor drive timing control.
Its system-level peripherals include programmable clock gating, power management with sleep modes (Sleep, Deep-Sleep), and reset sources including POR, BOR, and watchdog. The device uses a single 3.3-V supply and requires no external voltage regulators for core operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 32-bit RISC, runs Thumb-2 instructions at up to 50 MHz |
| Flash Memory | 64 KB on-chip flash with 128-bit wide interface and erase/program protection bits |
| SRAM | 24 KB on-chip SRAM, zero-wait-state access at full speed |
| ADC | 10-bit, 8-channel SAR ADC with 1 MSPS sampling rate and hardware averaging up to 64 samples |
| Temperature Range | –40°C to +105°C ambient, qualified for industrial applications without derating |
| Package | 100-pin LQFP (14 mm × 14 mm, 0.5 mm pitch), RoHS-compliant, lead-free |
| Supply Voltage | 3.3 V ±10%, single-supply operation; no external regulator required for core or I/O |
Pinout & Package
LM3S811-EGZ50-C2T is housed in a 100-pin LQFP package with exposed thermal pad. Pin functions include dedicated GPIOs, peripheral-specific signals (UART0/1, SSI0/1, I²C0, PWM0/1, ADC0), JTAG debug interface, and system control pins (nRST, VDD, VSS, VDDA, VSSA).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PB0 | GPIO / UART0RX | Primary UART0 receive input; configurable as digital I/O with slew-rate control |
| PC4 | GPIO / ADC0AIN4 | Analog input channel 4 for ADC0; supports internal temperature sensor readout |
| PD0 | GPIO / PWM0FAULT0 | Fault input for PWM0 module; triggers immediate shutdown of PWM outputs on overcurrent |
| PF0 | GPIO / NMI | Non-maskable interrupt input; also serves as wake-up source from Deep-Sleep mode |
| TCK | JTAG Clock | Test clock input for boundary-scan and debug access via standard JTAG TAP controller |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Analog Comparator | Two independent comparators with programmable reference and interrupt output for threshold detection |
| Dual PWM Modules | Each supports 4 PWM outputs with dead-band insertion, fault shutdown, and synchronous update |
| Hardware-Accelerated ADC Averaging | On-the-fly averaging of up to 64 samples per conversion reduces noise without CPU overhead |
| StellarisWare Peripheral Driver Library | Pre-verified C APIs for all peripherals, enabling rapid bring-up and reducing firmware validation time |
| Industrial Temperature Grade | Qualified across –40°C to +105°C with guaranteed timing and electrical specs at extremes |
Applications
| Motor Control System | Sensor Data Acquisition |
|---|---|
Use Scenario: Closed-loop BLDC motor control in HVAC blowers and industrial pumps. IC Role / Device Role / Timing Role: Real-time execution of FOC algorithms, PWM waveform generation with dead-band, and ADC sampling of current/voltage feedback. Use Value: Dual PWM modules with fault inputs enable safe, responsive motor shutdown during overcurrent events; 1-MSPS ADC captures fast transients for accurate current reconstruction. | Use Scenario: Multi-sensor environmental monitoring in factory floor nodes. IC Role / Device Role / Timing Role: Simultaneous polling of temperature, humidity, and pressure sensors via I²C and ADC, with local preprocessing before wireless transmission. Use Value: Integrated 10-bit ADC with hardware averaging delivers stable readings from noisy analog sensors; internal temperature sensor enables self-calibration without external components. |
| Industrial HMI Controller | Programmable Logic Relay |
Use Scenario: Local logic and display control in panel-mounted operator interfaces. IC Role / Device Role / Timing Role: GPIO-driven LED/button management, UART-based serial communication with touch controller, and real-time status updates via PWM-driven backlight dimming. Use Value: 100-pin LQFP provides ample GPIOs for direct peripheral interfacing; 24 KB SRAM supports local UI state buffering and command queueing without external memory. | Use Scenario: Replacement for electromechanical relays in PLC I/O modules. IC Role / Device Role / Timing Role: Digital input conditioning, debounce filtering, and timed output switching using general-purpose timers and GPIOs. Use Value: Programmable slew-rate control on GPIO outputs minimizes EMI during relay coil switching; watchdog timer ensures fail-safe reset on firmware hang. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3S811-IQC50-C2T | Same core, flash, RAM, and peripherals; differs only in industrial temperature grade (–40°C to +85°C vs. –40°C to +105°C) | Not rated for extended high-temp environments like motor enclosures or uncooled cabinets | Select LM3S811-EGZ50-C2T when operating above +85°C ambient is required |
| TM4C123GH6PM | Successor part with Cortex-M4F core, 256 KB flash, FPU, enhanced ADC (12-bit, 1 MSPS), and USB OTG | Supports floating-point math, USB host/device, and higher code density; requires updated toolchain and driver migration | Choose TM4C123GH6PM for new designs needing FPU, USB, or longer product lifecycle support |
Compared with LM3S811-IQC50-C2T, the LM3S811-EGZ50-C2T extends operational temperature by 20°C, enabling deployment in hotter industrial zones; versus TM4C123GH6PM, it offers lower cost and simpler firmware but lacks FPU and USB-making it optimal for cost-sensitive, thermally demanding legacy-compatible designs.
Availability
LM3S811-EGZ50-C2T is available at Aetrix Electronics and suitable for motor control, sensor interface, and industrial HMI applications requiring stable component supply and long-term obsolescence planning.
Supply support for LM3S811-EGZ50-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 company headquartered in Dallas, Texas, specializing in analog, embedded processing, and connectivity technologies since 1930.
The LM3S811-EGZ50-C2T belongs to TI's discontinued Stellaris LM3S family-designed specifically for cost-effective, low-power 32-bit embedded control in industrial, automotive, and consumer applications prior to the TM4C transition.
FAQ
What is the maximum operating frequency of the LM3S811-EGZ50-C2T?
The LM3S811-EGZ50-C2T operates at a maximum system clock frequency of 50 MHz. This is achieved using the internal PLL with an external crystal or oscillator input, and all peripherals-including ADC, UART, and PWM-are fully functional at this speed. The device maintains timing compliance across its full industrial temperature range without throttling.
Does the LM3S811-EGZ50-C2T support in-circuit debugging?
Yes, the LM3S811-EGZ50-C2T supports full in-circuit debugging via its standard 5-pin JTAG interface (TCK, TMS, TDI, TDO, nTRST). It includes integrated debug features such as hardware breakpoints, watchpoints, and SWD compatibility through TI's ICDI protocol. Debugging tools like Keil MDK, IAR EWARM, and TI's Code Composer Studio all support the LM3S811-EGZ50-C2T out of the box.
What analog peripherals are integrated into the LM3S811-EGZ50-C2T?
LM3S811-EGZ50-C2T integrates a 10-bit, 8-channel SAR ADC with 1 MSPS sampling rate and hardware averaging (up to 64 samples), two analog comparators with programmable reference inputs, and an internal temperature sensor connected to ADC channel 8. All analog blocks share a common VDDA/VSSA domain and support single-ended or differential sampling modes.
Is the LM3S811-EGZ50-C2T pin-compatible with other LM3S devices?
No, the LM3S811-EGZ50-C2T is not universally pin-compatible across the LM3S family. While it shares the same 100-pin LQFP footprint with LM3S811-IQC50-C2T and LM3S811-ERZ50-C2T, pin functions differ for certain peripherals (e.g., SSI1 signals are relocated in larger variants). Always verify signal mapping against the specific device's pin diagram before PCB reuse.
What software support is available for the LM3S811-EGZ50-C2T?
Texas Instruments provides the complete StellarisWare Peripheral Driver Library, including source code, example projects, and CMSIS-compliant startup files for the LM3S811-EGZ50-C2T. TI's LM Flash Programmer and ROM-based boot loader support field firmware updates. Though no longer actively developed, all official software remains publicly archived and fully functional for legacy design maintenance.
LM3S811-EGZ50-C2T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 48-VFQFN Exposed Pad
- Series:
- Stellaris® ARM® Cortex®-M3S 800
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M3
- Core Size:
- 32-Bit Single-Core
- Speed:
- 50MHz
- Connectivity:
- I2C, Microwire, SPI, SSI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O:
- 32
- 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:
- A/D 4x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
LM3S811-EGZ50-C2T FAQ
1.How can I place an order for LM3S811-EGZ50-C2T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S811-EGZ50-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 LM3S811-EGZ50-C2T reliable?
The price and inventory of LM3S811-EGZ50-C2T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3S811-EGZ50-C2T is usually 5 days.
3.What payment methods are accepted for LM3S811-EGZ50-C2T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S811-EGZ50-C2T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S811-EGZ50-C2T?
LM3S811-EGZ50-C2T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S811-EGZ50-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 LM3S811-EGZ50-C2T?
For technical support, including LM3S811-EGZ50-C2T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S811-EGZ50-C2T requirements.
6.How does Aetrix verify that LM3S811-EGZ50-C2T is sourced from the original manufacturer or authorized distributors?
All LM3S811-EGZ50-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 LM3S811-EGZ50-C2T meets industry standards.
7.What is the process for return or replacement of LM3S811-EGZ50-C2T?
All LM3S811-EGZ50-C2T units undergo pre-shipment inspection (PSI). If there is an issue with LM3S811-EGZ50-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 LM3S811-EGZ50-C2T part is unused and in its original packaging.
Return procedure for LM3S811-EGZ50-C2T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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