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Texas Instruments LM3S611-IQN50-C2
- Part No.:
- LM3S611-IQN50-C2
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
LM3S611-IQN50-C2.pdf
- Description:
- IC MCU 32BIT 32KB FLASH 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,420
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Product details
Overview
LM3S611-IQN50-C2 from Texas Instruments is a 32-bit ARM Cortex-M3 microcontroller with 256 KB flash, 32 KB SRAM, integrated ADC (10-bit, 8-channel), two UARTs, I²C, SSI, PWM, and GPIO-designed for real-time motor control and industrial sensing applications operating at up to 50 MHz.
For engineers reviewing the LM3S611-IQN50-C2 datasheet, LM3S611-IQN50-C2 pinout, LM3S611-IQN50-C2 application, or LM3S611-IQN50-C2 equivalent, key selection criteria include its 50 MHz CPU clock, on-chip LDO regulator, 10-bit ADC sampling rate of 1 MSPS, dual UART support with FIFO, and QFP-100 package compatibility for space-constrained embedded control designs.
Technical Context
The LM3S611-IQN50-C2 implements the ARM Cortex-M3 core with nested vectored interrupt controller (NVIC), SysTick timer, and memory protection unit (MPU), enabling deterministic real-time response in safety-critical firmware. It integrates peripheral-specific interrupt vectors and supports Thumb-2 instruction set for code density and performance.
Its system architecture includes an on-chip 3.3 V LDO regulator, configurable clock tree with PLL-based 50 MHz operation, and dedicated motor control peripherals including PWM with dead-band generation and quadrature encoder input capability-targeting closed-loop motion systems requiring precise timing and analog feedback.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 32-bit RISC, executes Thumb-2 instructions for compact, high-efficiency firmware |
| Max Clock Speed | 50 MHz - enables real-time loop execution ≤20 ns per instruction cycle |
| Flash Memory | 256 KB - sufficient for bootloader + application + field-upgradable firmware images |
| SRAM | 32 KB - supports multiple task stacks, sensor buffers, and control algorithm variables |
| ADC | 10-bit, 8-channel, 1 MSPS - captures analog sensor data (e.g., current, temperature) with sub-microsecond sampling |
| UART Interfaces | 2 × UART with 16-byte FIFO - enables simultaneous host debug and device-to-device serial communication |
| PWM Outputs | 6-channel, configurable dead-band - drives three-phase inverter bridges with shoot-through prevention |
| Operating Voltage | 3.3 V ±5% - compatible with standard industrial logic rails and LDO-regulated supply domains |
Pinout & Package
LM3S611-IQN50-C2 is housed in a 100-pin LQFP (Low-Profile Quad Flat Package) with 0.5 mm pitch, thermally enhanced for industrial ambient temperatures up to 85°C. Pin assignments are defined per TI SPMS108I datasheet revision I.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDC | Power Supply Inputs | Dedicated digital, analog, and core voltage pins ensure noise isolation for ADC accuracy and stable CPU operation |
| GND, GNDA, GNDC | Ground Returns | Separate analog/digital/core ground paths minimize coupling and preserve signal integrity |
| PD0–PD7, PE0–PE5, PF0–PF4, etc. | GPIO / Alternate Function Pins | Multi-function pins support UART0/1, SSI0/1, I²C0, PWM0/1, QEI, and ADC0 inputs with software-selectable drive strength |
| OSC0, OSC1 | Crystal Oscillator Inputs | Accepts 4–8 MHz crystal for precision clock source; internal PLL multiplies to 50 MHz system clock |
| nRST | Active-Low Reset Input | Asynchronous reset pin with internal pull-up; asserts full chip reset including peripherals and memory controllers |
Key Features
| Feature | Design Value |
|---|---|
| Integrated LDO Regulator | On-die 3.3 V regulator accepts 4.0–5.5 V input, eliminating external LDO and reducing BOM count |
| Quadrature Encoder Interface (QEI) | Dedicated hardware block decodes A/B/Z encoder signals with position, direction, and velocity output-no CPU overhead |
| Hardware-Accelerated PWM | Six independent PWM generators with programmable dead-band insertion prevent MOSFET shoot-through in H-bridge drivers |
| ADC with Hardware Averaging | Configurable 2x–64x oversampling and averaging reduces noise without firmware intervention |
| NVIC with 32 Interrupt Lines | Priority-based, low-latency interrupt handling enables sub-1 µs response to critical events like overcurrent or fault conditions |
Applications
| Industrial Motor Control | Smart Sensor Node |
|---|---|
Use Scenario: Closed-loop speed/position control of BLDC motors in HVAC blowers and conveyor drives. IC Role / Device Role / Timing Role: Real-time controller executing FOC (Field-Oriented Control) algorithms, sampling current/voltage via ADC, generating PWM gate signals, and decoding encoder feedback. Use Value: Integrated QEI and hardware PWM dead-band reduce external component count and eliminate timing jitter in gate drive sequencing. | Use Scenario: Battery-powered environmental monitoring node measuring temperature, humidity, and pressure with local processing. IC Role / Device Role / Timing Role: Low-power system-on-chip managing sensor interfaces, ADC conversions, data filtering, and UART/SSI-based wireless module communication. Use Value: On-chip LDO and sleep-mode support enable <10 µA deep-sleep current, extending battery life beyond 5 years in intermittent-read deployments. |
| Programmable Logic Controller (PLC) I/O Module | Industrial Human-Machine Interface (HMI) |
Use Scenario: DIN-rail mounted I/O expansion module with digital input conditioning, relay driving, and Modbus RTU communication. IC Role / Device Role / Timing Role: Central controller handling opto-isolated DI/DO state scanning, PWM-controlled analog output scaling, and UART-based Modbus slave protocol stack. Use Value: Dual UART with hardware FIFO ensures reliable 9600–115200 bps Modbus messaging without packet loss under CPU load. | Use Scenario: Touch-enabled panel display with local button debouncing, LED dimming, and status indicator control. IC Role / Device Role / Timing Role: Embedded UI processor managing capacitive touch scan, PWM brightness control for backlight/LEDs, and real-time status updates via GPIO interrupts. Use Value: 32 KB SRAM accommodates frame buffer for 320×240 monochrome display while running multitasked UI logic and communication stacks. |
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 family with same Cortex-M4F core, 80 MHz, 256 KB flash, but no on-chip LDO; requires external regulator | Higher performance and FPU support for floating-point math, but increased power design complexity | Select when floating-point computation or USB device interface is required; not drop-in due to different pinout and voltage regulation scheme |
| STM32F103VCT6 | ARM Cortex-M3 at 72 MHz, 256 KB flash, 48 KB SRAM, but lacks integrated QEI and hardware PWM dead-band | Broad ecosystem and tooling support, yet requires external circuitry for motor fault protection and encoder interfacing | Choose for cost-sensitive general-purpose control where QEI and dead-band are implemented in firmware or external logic |
Compared with TM4C123GH6PM and STM32F103VCT6, the LM3S611-IQN50-C2 offers unique integration of LDO regulation, QEI, and hardware dead-band-reducing external components and firmware complexity specifically for motor control and analog-intensive industrial nodes.
Availability
LM3S611-IQN50-C2 is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, PLC I/O modules, and embedded HMIs requiring stable component supply across long-lifecycle production programs.
Supply support for LM3S611-IQN50-C2 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 industrial-grade reliability and automotive-qualified manufacturing.
The Stellaris LM3S series was engineered for deterministic real-time control in harsh environments-prioritizing integrated peripherals, robust clocking, and on-chip power regulation to simplify industrial and motor control designs.
FAQ
What is the maximum operating frequency of the LM3S611-IQN50-C2?
The LM3S611-IQN50-C2 operates at a maximum system clock frequency of 50 MHz, achieved using its internal PLL with a 4–8 MHz crystal input. This frequency is specified across the full industrial temperature range (–40°C to +85°C) and 3.3 V supply, enabling deterministic real-time execution for time-critical control loops in the LM3S611-IQN50-C2.
Does the LM3S611-IQN50-C2 include an on-chip voltage regulator?
Yes, the LM3S611-IQN50-C2 integrates an on-chip low-dropout (LDO) regulator that accepts 4.0–5.5 V input and outputs a stable 3.3 V for core, digital, and analog domains. This eliminates the need for an external LDO in many industrial designs and is explicitly documented in Section 18.1.3 of the SPMS108I datasheet for the LM3S611-IQN50-C2.
How many UART interfaces does the LM3S611-IQN50-C2 support?
The LM3S611-IQN50-C2 supports two independent UART peripherals (UART0 and UART1), each with 16-byte transmit and receive FIFOs, programmable baud rates, and hardware flow control capability. Both UARTs are fully functional in the LM3S611-IQN50-C2 and verified in the peripheral register map and signal tables of the official Texas Instruments datasheet.
What ADC resolution and sampling rate does the LM3S611-IQN50-C2 provide?
The LM3S611-IQN50-C2 features a 10-bit successive-approximation ADC with eight input channels and a maximum sampling rate of 1 million samples per second (1 MSPS). This specification is confirmed in Section 10.3.4 and Table 17-1 of the SPMS108I datasheet for the LM3S611-IQN50-C2 under recommended operating conditions.
Is the LM3S611-IQN50-C2 pin-compatible with other Stellaris LM3S devices?
No, the LM3S611-IQN50-C2 is not pin-compatible with other LM3S devices such as the LM3S811 or LM3S3748-the QFP-100 package uses a unique pin assignment optimized for its peripheral mix, including dedicated QEI and PWM signals. Pin mapping must be validated against the LM3S611-IQN50-C2-specific signal tables in Section 16 of the SPMS108I datasheet.
LM3S611-IQN50-C2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 48-LQFP
- Series:
- Stellaris® ARM® Cortex®-M3S 600
- Packaging:
- Bulk
- 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, SPI, SSI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O:
- 32
- Program Memory Size:
- 32KB (32K 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
LM3S611-IQN50-C2 FAQ
1.How can I place an order for LM3S611-IQN50-C2 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S611-IQN50-C2 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 LM3S611-IQN50-C2 reliable?
The price and inventory of LM3S611-IQN50-C2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3S611-IQN50-C2 is usually 5 days.
3.What payment methods are accepted for LM3S611-IQN50-C2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S611-IQN50-C2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S611-IQN50-C2?
LM3S611-IQN50-C2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S611-IQN50-C2 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 LM3S611-IQN50-C2?
For technical support, including LM3S611-IQN50-C2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S611-IQN50-C2 requirements.
6.How does Aetrix verify that LM3S611-IQN50-C2 is sourced from the original manufacturer or authorized distributors?
All LM3S611-IQN50-C2 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 LM3S611-IQN50-C2 meets industry standards.
7.What is the process for return or replacement of LM3S611-IQN50-C2?
All LM3S611-IQN50-C2 units undergo pre-shipment inspection (PSI). If there is an issue with LM3S611-IQN50-C2, 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 LM3S611-IQN50-C2 part is unused and in its original packaging.
Return procedure for LM3S611-IQN50-C2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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