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Texas Instruments LM3S611-IQN50-C2T
- Part No.:
- LM3S611-IQN50-C2T
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
LM3S611-IQN50-C2T.pdf
- Description:
- IC MCU 32BIT 32KB FLASH 48LQFP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LM3S611-IQN50-C2T 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 industrial control in compact embedded systems such as motor drive interfaces and sensor node controllers.
For engineers reviewing the LM3S611-IQN50-C2T datasheet, LM3S611-IQN50-C2T pinout, LM3S611-IQN50-C2T application, or LM3S611-IQN50-C2T equivalent, key selection criteria include its 50 MHz CPU clock, QFP-100 package, -40°C to +85°C industrial temperature grade, and support for deterministic interrupt latency under 12 cycles.
Technical Context
The LM3S611-IQN50-C2T implements the ARMv7-M architecture with NVIC supporting up to 32 configurable interrupts, SysTick timer, and MPU for memory protection. It integrates a 10-bit 1-MSPS ADC with hardware averaging and four general-purpose timers-two 32-bit and two 16-bit-with RTC and PWM modes.
Peripherals include dual UARTs with FIFO and modem control signals, an I²C master/slave controller compliant with SMBus v2.0, and an SSI module supporting Motorola SPI, TI synchronous serial, and Microwire protocols-all operating from a single 50 MHz system clock derived from internal PLL or external crystal.
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 | 256 KB on-chip, supports in-application programming (IAP) and erase/program via JTAG or SWD |
| SRAM | 32 KB on-chip, zero-wait-state access at full CPU speed |
| ADC | 10-bit SAR, 8-channel, 1 MSPS sampling rate, internal temperature sensor included |
| Timers | Four general-purpose timers: two 32-bit, two 16-bit; supports one-shot, periodic, RTC, PWM, and input capture |
| Communication | Two UARTs (with modem control), one I²C, one SSI (SPI-compatible), all with programmable baud rates and FIFO |
| Package | 100-pin LQFP (14 mm × 14 mm), 0.5 mm pitch, RoHS-compliant |
| Temperature Range | -40°C to +85°C ambient, qualified for industrial applications |
Pinout & Package
LM3S611-IQN50-C2T is housed in a 100-pin Low-Profile Quad Flat Package (LQFP) with exposed thermal pad, designed for surface-mount reflow assembly and thermal dissipation in space-constrained industrial modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDC | Power supply inputs | Separate digital core (VDDC), analog (VDDA), and I/O (VDD) rails enable noise isolation for ADC and mixed-signal operation |
| GND, GNDA, GNDC | Ground returns | Dedicated analog (GNDA) and core (GNDC) grounds reduce coupling between sensitive analog and switching digital domains |
| PD0–PD7, PE0–PE5, PF0–PF4, PG0–PG7, PH0–PH7, PK0–PK7 | GPIO ports | Eight configurable GPIO ports with alternate functions mapped per pin; each supports slew-rate control and weak pull-up/pull-down |
| U0RX/U0TX, U1RX/U1TX | UART data I/O | Dual UART interfaces with full handshaking (RTS/CTS) and 16-byte FIFOs for robust serial communication |
| SSI0CLK/SSI0FSS/SSI0RX/SSI0TX | SSI interface signals | Four-pin synchronous serial interface supporting master/slave operation, programmable bit rate, and multiple frame formats |
| I2C0SCL/I2C0SDA | I²C bus signals | Open-drain bidirectional I²C interface compliant with standard/fast mode (up to 400 kHz) |
| ADC00–ADC07 | Analog input channels | Eight dedicated ADC input pins with internal multiplexer; supports single-ended or differential sampling |
| XTAL, XTAL32 | Clock source inputs | Supports main 4–25 MHz crystal oscillator and optional 32.768 kHz RTC crystal for low-power timekeeping |
Key Features
| Feature | Design Value |
|---|---|
| ARM Cortex-M3 core with NVIC | Hardware-based nested vectored interrupt controller enables sub-12-cycle interrupt latency and priority grouping for real-time responsiveness |
| Integrated analog subsystem | 10-bit ADC with hardware sample averaging, internal temperature sensor, and selectable reference (VDDA or internal 1.65 V) |
| Dual UART with modem control | Full RTS/CTS flow control and 16-byte FIFO per UART prevent data loss in high-throughput serial links |
| PWM with dead-band generation | Three PWM generator blocks, each with two PWM outputs and programmable dead-band delay for motor gate-drive safety |
| Memory protection unit (MPU) | Configurable region-based memory access control prevents unintended code execution or data corruption in multitask environments |
| JTAG/SWD debug interface | Standard 5-pin JTAG and 2-pin SWD support boundary scan, flash programming, and real-time debugging without halting CPU |
Applications
| Industrial Motor Control | Sensor Data Acquisition Node |
|---|---|
Use Scenario: Closed-loop control of BLDC motors in HVAC blowers using hall-effect feedback and PWM-driven gate drivers. IC Role / Device Role / Timing Role: Real-time execution of FOC algorithms, ADC sampling of current/voltage, and precise PWM timing with dead-band insertion. Use Value: Deterministic 50 MHz Cortex-M3 execution and hardware-accelerated PWM/ADC reduce firmware overhead and improve torque ripple suppression. | Use Scenario: Battery-powered environmental monitor collecting temperature, humidity, and CO₂ via analog and I²C sensors. IC Role / Device Role / Timing Role: Sensor interface hub with low-power sleep modes, wake-on-ADC threshold, and UART/SSI data aggregation before transmission. Use Value: Integrated 10-bit ADC with hardware averaging and ultra-low-power sleep states (<1 µA in deep-sleep) extend battery life beyond 2 years. |
| Programmable Logic Controller (PLC) I/O Module | Embedded Human-Machine Interface (HMI) |
Use Scenario: DIN-rail mounted remote I/O terminal converting fieldbus signals (Modbus RTU over RS-485) to Ethernet backhaul. IC Role / Device Role / Timing Role: Protocol translation engine with dual UARTs (one for RS-485 transceiver, one for host MCU), GPIO for discrete I/O, and watchdog supervision. Use Value: Dual UART FIFOs and configurable GPIO slew rates ensure reliable Modbus framing and ESD-robust digital I/O in electrically noisy factory floors. | Use Scenario: Touch-enabled panel display controlling lighting, HVAC, and security in commercial buildings. IC Role / Device Role / Timing Role: Local controller managing capacitive touch sensing, LED dimming via PWM, and local alarm logic independent of cloud connectivity. Use Value: On-chip PWM with 1024-step resolution and GPIO-driven touch scanning eliminate external driver ICs, reducing BOM cost and PCB area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3S6965-IQN50-C2T | 512 KB flash, 64 KB SRAM, additional CAN controller and Ethernet MAC; same pinout and peripheral set except added CAN | Required where CAN bus integration or larger firmware storage is needed (e.g., automotive body control) | Select LM3S6965-IQN50-C2T only if CAN interface or >256 KB code space is mandatory; otherwise LM3S611-IQN50-C2T offers lower cost and identical footprint |
| TM4C123GH6PM | Successor family: 80 MHz Cortex-M4F, FPU, 256 KB flash, 32 KB SRAM, same 100-pin LQFP but different pin mapping and voltage regulator requirements | Needed for floating-point math, higher throughput, or long-term availability (LM3S series discontinued) | TM4C123GH6PM requires PCB redesign due to non-pin-compatible pinout and different power sequencing; use only for new designs targeting extended lifecycle |
Compared with LM3S611-IQN50-C2T, LM3S6965-IQN50-C2T adds CAN without layout change, while TM4C123GH6PM delivers higher performance but mandates board revision-making LM3S611-IQN50-C2T optimal for cost-sensitive, CAN-free industrial upgrades with legacy compatibility.
Availability
LM3S611-IQN50-C2T is available at Aetrix Electronics and suitable for industrial motor control, sensor data acquisition, and programmable logic controller (PLC) I/O modules requiring stable component supply and long-lifecycle support.
Supply support for LM3S611-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 delivering analog, embedded processing, and connectivity solutions with emphasis on reliability, longevity, and industrial-grade qualification.
The Stellaris LM3S series was engineered specifically for deterministic real-time control in resource-constrained industrial and automation equipment, prioritizing low-latency interrupt response, integrated analog peripherals, and robust debug infrastructure.
FAQ
What is the maximum operating frequency of the LM3S611-IQN50-C2T?
The LM3S611-IQN50-C2T operates at a maximum system clock frequency of 50 MHz, achieved via internal PLL multiplication of an external crystal (4–25 MHz) or precision internal oscillator. This frequency applies to both CPU core and peripheral bus clocks, enabling deterministic real-time execution and 1-MSPS ADC sampling without overclocking.
Does the LM3S611-IQN50-C2T support JTAG debugging?
Yes, the LM3S611-IQN50-C2T supports full IEEE 1149.1 JTAG debugging through a 5-pin interface (TCK, TMS, TDI, TDO, nTRST), including boundary scan, flash programming, and real-time halt/resume. It also supports 2-pin Serial Wire Debug (SWD) for space-constrained layouts, both accessible via the same debug port pins.
What are the power supply requirements for the LM3S611-IQN50-C2T?
The LM3S611-IQN50-C2T requires three separate supply rails: VDDC (1.2 V core), VDDA (2.7–3.6 V analog), and VDD (2.7–3.6 V I/O). An internal LDO generates VDDC from VDD; external regulation is required for VDDA to ensure ADC accuracy. All supplies must be decoupled with 0.1 µF ceramic capacitors near respective pins.
Can the LM3S611-IQN50-C2T operate in low-power modes?
Yes, the LM3S611-IQN50-C2T supports Sleep, Deep-Sleep, and Hibernate modes. In Hibernate mode, current drops to <1 µA while retaining RAM state and waking on external interrupt or RTC alarm. Wake-up latency from Hibernate is under 100 µs, making it suitable for battery-powered sensor nodes with infrequent wake cycles.
Is the LM3S611-IQN50-C2T pin-compatible with other Stellaris LM3S devices?
The LM3S611-IQN50-C2T shares the same 100-pin LQFP package and pin mapping with LM3S6965-IQN50-C2T and LM3S811-IQN50-C2T, enabling drop-in replacement where CAN or USB peripherals are unused. However, it is not compatible with LM3S3748 or TM4C series due to differing pin assignments and power rail configurations.
LM3S611-IQN50-C2T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 48-LQFP
- Series:
- Stellaris® ARM® Cortex®-M3S 600
- 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, 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-C2T FAQ
1.How can I place an order for LM3S611-IQN50-C2T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S611-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 LM3S611-IQN50-C2T reliable?
The price and inventory of LM3S611-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 LM3S611-IQN50-C2T is usually 5 days.
3.What payment methods are accepted for LM3S611-IQN50-C2T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S611-IQN50-C2T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S611-IQN50-C2T?
LM3S611-IQN50-C2T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S611-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 LM3S611-IQN50-C2T?
For technical support, including LM3S611-IQN50-C2T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S611-IQN50-C2T requirements.
6.How does Aetrix verify that LM3S611-IQN50-C2T is sourced from the original manufacturer or authorized distributors?
All LM3S611-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 LM3S611-IQN50-C2T meets industry standards.
7.What is the process for return or replacement of LM3S611-IQN50-C2T?
All LM3S611-IQN50-C2T units undergo pre-shipment inspection (PSI). If there is an issue with LM3S611-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 LM3S611-IQN50-C2T part is unused and in its original packaging.
Return procedure for LM3S611-IQN50-C2T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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