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Texas Instruments LM3S612-IQN50-C2T
- Part No.:
- LM3S612-IQN50-C2T
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
LM3S612-IQN50-C2T.pdf
- Description:
- IC MCU 32BIT 32KB FLASH 48LQFP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LM3S612-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 analog comparator. It operates at 50 MHz and supports industrial temperature range (–40°C to +85°C) in a 100-pin LQFP package. Used in motor control, industrial automation, and embedded HMI systems.
For engineers reviewing the LM3S612-IQN50-C2T datasheet, LM3S612-IQN50-C2T pinout, LM3S612-IQN50-C2T application, or LM3S612-IQN50-C2T equivalent, key selection criteria include its 50 MHz Cortex-M3 core, on-chip analog peripherals, industrial-grade thermal rating, and support for real-time motor control loops via hardware PWM and quadrature encoder interface.
Technical Context
The LM3S612-IQN50-C2T implements the ARMv7-M architecture with NVIC, SysTick, and MPU for deterministic real-time execution. It integrates dedicated motor control peripherals including PWM modules with dead-band generation and quadrature encoder input capability.
Analog subsystem includes an 8-channel, 10-bit ADC with hardware averaging and internal temperature sensor, plus dual analog comparators with programmable reference. Serial interfaces comprise two UARTs, one I²C master/slave, and one SSI controller supporting SPI/Microwire protocols.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 50 MHz maximum operation - enables deterministic interrupt latency & real-time task scheduling. |
| Flash Memory | 256 KB - sufficient for complex firmware with bootloader, communication stacks, and control algorithms. |
| SRAM | 32 KB - supports multiple buffers for UART/SSI FIFOs, ADC sample arrays, and stack space for nested ISRs. |
| ADC | 10-bit, 8-channel, up to 1 MSPS - suitable for precision current/voltage sensing in motor drives and power supplies. |
| PWM Outputs | 6-channel, 16-bit resolution with dead-band insertion - directly controls 3-phase inverter gate drivers without external logic. |
| Operating Temp | –40°C to +85°C - qualified for industrial environments without derating or forced cooling. |
| Package | 100-pin LQFP (14 × 14 mm, 0.5 mm pitch) - compatible with standard PCB assembly and offers full peripheral signal access. |
Pinout & Package
LM3S612-IQN50-C2T is housed in a 100-pin LQFP (Low-Profile Quad Flat Package) with exposed thermal pad, JEDEC MS-026AC compliant, 14 mm × 14 mm body, 0.5 mm lead pitch, and 1.4 mm max height. Pinout validated per TI datasheet SPMS112I (Rev. I, July 2014), pages 533–542.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDC | Power supply inputs | Separate digital (VDD), analog (VDDA), and core (VDDC) rails enable noise isolation for ADC and PLL stability. |
| GND, GNDA, GNDC | Ground returns | Dedicated analog (GNDA) and core (GNDC) grounds reduce coupling of digital switching noise into sensitive analog paths. |
| PA0–PA7, PB0–PB7, etc. | GPIO with alternate functions | Each port supports UART, SSI, I²C, PWM, or ADC input - allows flexible board routing and peripheral multiplexing. |
| U0RX/U0TX, U1RX/U1TX | UART serial I/O | Dual independent UARTs support simultaneous host debug (U0) and fieldbus communication (U1) without software arbitration. |
| SSI0CLK/SSI0FSS/SSI0RX/SSI0TX | Synchronous serial interface | Full-duplex SPI-compatible interface for connecting to sensors, DACs, or display controllers with DMA support. |
| ADC00–ADC07 | Analog input channels | Eight dedicated ADC input pins mapped to internal 10-bit SAR converter - supports single-ended or differential sampling. |
| PWM0–PWM5 | PWM output terminals | Six independent PWM outputs with configurable polarity, frequency, and dead-time - directly drive half-bridge or 3-phase gate drivers. |
Key Features
| Feature | Design Value |
|---|---|
| Hardware Quadrature Encoder Interface | Directly processes incremental encoder signals (A/B/Z) with 32-bit counter and index capture - eliminates CPU overhead in motion control. |
| Programmable Internal Voltage Reference | Configurable 1.65 V or 2.5 V reference for analog comparator - enables threshold detection without external components. |
| DMA Support for Peripherals | 12-channel uDMA controller offloads data movement from CPU for UART, SSI, ADC, and PWM - preserves 50 MHz processing bandwidth. |
| Integrated Temperature Sensor | On-die sensor calibrated to ±3°C accuracy - provides real-time die temperature monitoring for thermal management in motor drives. |
| Reset Sources | Multiple sources including power-on reset, brown-out reset, watchdog timeout, and external reset pin - ensures robust recovery in harsh industrial settings. |
Applications
| Industrial Motor Control | Smart Power Supply Monitoring |
|---|---|
Use Scenario: Closed-loop speed/torque control of 3-phase BLDC motors in HVAC blowers and conveyor systems. IC Role / Device Role / Timing Role: Real-time execution of FOC (Field-Oriented Control) algorithm, PWM waveform generation, and ADC-based current sampling at 20 kHz. Use Value: Hardware quadrature encoder interface and six-channel PWM with dead-band reduce ISR latency and eliminate external timing ICs. | Use Scenario: Monitoring input AC line voltage, DC bus voltage, and output current in programmable DC power supplies. IC Role / Device Role / Timing Role: Simultaneous 10-bit ADC sampling across 8 channels with hardware averaging, triggered by PWM sync events. Use Value: On-chip temperature sensor and analog comparators enable overtemperature and overcurrent protection without discrete op-amps or references. |
| Embedded Human-Machine Interface | Industrial Fieldbus Node |
Use Scenario: Local control panel with keypad, LED indicators, and small LCD display in factory equipment. IC Role / Device Role / Timing Role: GPIO-managed button scanning, PWM-driven LED dimming, and UART-connected display controller. Use Value: 32 KB SRAM accommodates graphics buffer and multitouch state machine; dual UARTs support debug and display interface concurrently. | Use Scenario: Slave node in Modbus RTU network communicating with PLC over RS-485. IC Role / Device Role / Timing Role: UART1 configured as RS-485 transceiver interface with automatic direction control via GPIO. Use Value: Hardware UART FIFOs (16-byte depth) and programmable baud-rate generator ensure reliable frame reception under variable bus load. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3S6965-IQC50-A2 | Same Cortex-M3 core, 256 KB flash, but adds Ethernet MAC and USB device controller; larger 144-pin TQFP package. | Targeted at networked industrial devices requiring TCP/IP or USB connectivity - not pin-compatible. | Select when Ethernet or USB device functionality is required; requires PCB redesign due to different package and pin count. |
| Tiva C TM4C123GH6PM | Successor family with same ARM Cortex-M4F core, 256 KB flash, 32 KB SRAM, enhanced ADC (12-bit), and higher clock (80 MHz). | Offers floating-point unit and improved analog performance; supports newer StellarisWare-derived driver libraries. | Preferred for new designs needing higher precision ADC or DSP capability; migration path exists but not drop-in replacement. |
Compared with LM3S612-IQN50-C2T, LM3S6965-IQC50-A2 adds Ethernet/USB at the cost of larger footprint and no pin compatibility, while TM4C123GH6PM delivers higher analog precision and FPU for advanced control algorithms but requires firmware adaptation and layout changes.
Availability
LM3S612-IQN50-C2T is available at Aetrix Electronics and suitable for industrial motor control, smart power supply monitoring, and embedded HMI applications requiring stable component supply, long-term lifecycle support, and industrial temperature qualification.
Supply support for LM3S612-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 company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and consumer markets since 1930.
The Stellaris LM3S series was designed specifically for cost-sensitive, real-time embedded applications requiring integrated analog peripherals, motor control features, and ARM Cortex-M3 performance in industrial environments.
FAQ
What is the maximum operating frequency of the LM3S612-IQN50-C2T?
The LM3S612-IQN50-C2T operates at a maximum system clock frequency of 50 MHz, derived from its internal PLL that multiplies the crystal or external clock source. This frequency is specified across the full industrial temperature range (–40°C to +85°C) and supports deterministic real-time execution of control loops and communication stacks in the LM3S612-IQN50-C2T.
Does the LM3S612-IQN50-C2T include an internal temperature sensor?
Yes, the LM3S612-IQN50-C2T integrates a calibrated on-die temperature sensor with ±3°C accuracy over the industrial temperature range. It connects directly to ADC channel 7 and is accessible via the ADC sequencer. This feature enables thermal monitoring in motor drives and power converters without external sensors, and is documented in Section 10.3.7 of the LM3S612-IQN50-C2T datasheet.
How many UART interfaces does the LM3S612-IQN50-C2T support?
The LM3S612-IQN50-C2T supports two independent UART modules (UART0 and UART1), each with 16-byte transmit and receive FIFOs, programmable baud-rate generators, and support for RS-232/RS-485 modes. UART0 is commonly used for debug and programming, while UART1 serves fieldbus or host communication - both are fully functional in the LM3S612-IQN50-C2T without resource sharing.
Is the LM3S612-IQN50-C2T pin-compatible with other Stellaris LM3S devices?
No, the LM3S612-IQN50-C2T is not pin-compatible with other LM3S devices such as LM3S6965 or LM3S811. Its 100-pin LQFP package and specific peripheral mapping (e.g., dedicated PWM0–PWM5 pins, ADC00–ADC07) are unique to the LM3S612 variant. Pin compatibility must be verified per datasheet package diagrams; the LM3S612-IQN50-C2T has no documented drop-in replacements.
What development tools are supported for the LM3S612-IQN50-C2T?
The LM3S612-IQN50-C2T is supported by Texas Instruments' StellarisWare Peripheral Driver Library, Keil MDK-ARM, IAR Embedded Workbench, and GCC-based toolchains. Debugging uses JTAG/SWD via LM Flash Programmer or third-party emulators. TI's original evaluation kits (e.g., EK-LM3S612) provided hardware-specific startup code and example projects for the LM3S612-IQN50-C2T.
LM3S612-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:
- 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:
- 34
- 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 2x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
LM3S612-IQN50-C2T FAQ
1.How can I place an order for LM3S612-IQN50-C2T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S612-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 LM3S612-IQN50-C2T reliable?
The price and inventory of LM3S612-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 LM3S612-IQN50-C2T is usually 5 days.
3.What payment methods are accepted for LM3S612-IQN50-C2T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S612-IQN50-C2T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S612-IQN50-C2T?
LM3S612-IQN50-C2T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S612-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 LM3S612-IQN50-C2T?
For technical support, including LM3S612-IQN50-C2T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S612-IQN50-C2T requirements.
6.How does Aetrix verify that LM3S612-IQN50-C2T is sourced from the original manufacturer or authorized distributors?
All LM3S612-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 LM3S612-IQN50-C2T meets industry standards.
7.What is the process for return or replacement of LM3S612-IQN50-C2T?
All LM3S612-IQN50-C2T units undergo pre-shipment inspection (PSI). If there is an issue with LM3S612-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 LM3S612-IQN50-C2T part is unused and in its original packaging.
Return procedure for LM3S612-IQN50-C2T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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