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Texas Instruments LM3S612-IQN50-C2
- Part No.:
- LM3S612-IQN50-C2
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
LM3S612-IQN50-C2.pdf
- Description:
- IC MCU 32BIT 32KB FLASH 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,706
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Product details
Overview
LM3S612-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), dual UARTs, I²C, SSI, PWM, and analog comparator - designed for real-time motor control and industrial sensing applications.
For engineers reviewing the LM3S612-IQN50-C2 datasheet, LM3S612-IQN50-C2 pinout, LM3S612-IQN50-C2 application, or LM3S612-IQN50-C2 equivalent, this page delivers verified specifications, package mapping, functional role in embedded control systems, and validated alternative parts for design continuity and supply resilience.
Technical Context
The LM3S612-IQN50-C2 implements the ARM Cortex-M3 core with Thumb-2 instruction set, NVIC-based interrupt handling, and bit-band memory access. It integrates a 50 MHz system clock, configurable PLL, and power management supporting sleep modes with wake-on-interrupt capability.
Peripherals include two 16/32-bit general-purpose timers with RTC and PWM modes, a 10-bit 1-MSPS ADC with hardware averaging and temperature sensor, and three serial interfaces (UART ×2, I²C, SSI) with FIFO and programmable baud-rate generation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 32-bit RISC, supports Thumb-2 for code density and real-time determinism |
| Max Clock Speed | 50 MHz - enables deterministic response in motor control loops and sensor sampling at ≤20 µs intervals |
| Flash Memory | 256 KB - sufficient for bootloader + application firmware with field-upgrade partitioning |
| SRAM | 32 KB - supports real-time stack, DMA buffers, and control algorithm state variables |
| ADC | 10-bit, 8-channel, 1 MSPS - provides single-cycle sampling for current/voltage feedback in BLDC drives |
| Timers | 2× 32-bit GPTM with PWM, RTC, and input capture - enables precise commutation timing and encoder counting |
| Serial Interfaces | 2× UART, 1× I²C, 1× SSI - supports host diagnostics, sensor bus connectivity, and SPI-based actuator control |
Pinout & Package
LM3S612-IQN50-C2 is housed in a 100-pin LQFP (14 mm × 14 mm, 0.5 mm pitch) package with exposed thermal pad. Pin assignments are defined per TI SPMS112I datasheet Section 16 (Pin Diagram) and Section 17 (Signal Tables).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDC | Power supply inputs | Digital (3.3 V), analog (3.3 V), and core (1.2 V) rails - require separate decoupling to meet noise immunity specs for ADC and PWM |
| GND, GNDA, GNDC | Ground returns | Analog/digital/core ground separation prevents coupling of switching noise into sensitive analog paths |
| PD0–PD7, PE0–PE5, PF0–PF4, etc. | GPIO with alternate functions | Multi-function pins support UART TX/RX, SSI CLK/FSS/MOSI/MISO, I²C SCL/SDA, PWM outputs, and ADC inputs |
| OSC0, OSC1 | Crystal oscillator inputs | Supports external 4–25 MHz crystal for precise system clock generation and PLL reference |
| nRST | Active-low reset input | Asynchronous reset with internal pull-up; compatible with pushbutton or supervisor IC assertion |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Analog Comparator | Two independent comparators with programmable hysteresis and interrupt output - enables overcurrent trip detection without CPU intervention |
| Hardware-Averaged ADC | Configurable 2–64 sample averaging per conversion - improves SNR for low-level sensor signals (e.g., thermistor, strain gauge) |
| PWM Dead-Band Generator | Programmable delay (0–15 cycles) between complementary outputs - prevents shoot-through in half-bridge gate drivers |
| Nested Vectored Interrupt Controller (NVIC) | 8-level priority, 32 interrupt lines with automatic stacking - ensures sub-1 µs latency for critical fault responses |
| Memory Protection Unit (MPU) | 8-region MPU with configurable access permissions - isolates bootloader, application, and peripheral drivers for safety-critical updates |
Applications
| Industrial Motor Control | Smart Sensor Node |
|---|---|
Use Scenario: Closed-loop control of 3-phase BLDC motors in HVAC blowers and pump drives. IC Role / Device Role / Timing Role: Real-time execution of FOC algorithms, PWM generation with dead-band, ADC sampling of phase currents, and fault monitoring via analog comparators. Use Value: Enables <1 µs interrupt latency and synchronized 100 kHz PWM/ADC timing - critical for torque ripple reduction and thermal protection. | Use Scenario: Battery-powered environmental monitor measuring temperature, humidity, and CO₂ via analog and digital sensors. IC Role / Device Role / Timing Role: Low-power system controller managing sensor polling, data aggregation, UART logging, and sleep/wake scheduling. Use Value: 32 KB SRAM retains sensor history during deep-sleep; integrated temperature sensor calibrates ADC offset drift across operating range. |
| Programmable Logic Controller (PLC) I/O Module | Industrial HMI Interface |
Use Scenario: DIN-rail mounted I/O expansion module with digital input filtering, relay drive, and Modbus RTU communication. IC Role / Device Role / Timing Role: GPIO debouncing logic, UART-based Modbus slave, watchdog supervision, and non-volatile parameter storage in flash. Use Value: Dual UARTs allow simultaneous debug port and fieldbus interface; flash endurance (>100k erase cycles) supports firmware and configuration updates. | Use Scenario: Touch-enabled local operator panel with LED status indicators, button scanning, and RS-485 backchannel to main controller. IC Role / Device Role / Timing Role: Human interface processor handling capacitive touch timing, LED PWM dimming, and SSI-driven display driver interface. Use Value: SSI supports high-speed SPI display refresh; GPIO matrix scanning reduces external component count for 16-button keypad. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3S6965-IQC50-C2 | 512 KB flash, 64 KB SRAM, Ethernet MAC, additional UART and SSI - larger memory and connectivity footprint | Suitable for networked edge nodes requiring TCP/IP stack or larger firmware images | Select when Ethernet or >256 KB flash is required; otherwise LM3S612-IQN50-C2 offers better cost/performance for standalone control |
| Tiva C TM4C123GH6PM | 80 MHz Cortex-M4F core, 256 KB flash, 32 KB SRAM, FPU, enhanced PWM and USB - newer architecture with floating-point acceleration | Better suited for advanced motion control with trigonometric calculations or USB device interface | Choose TM4C123GH6PM for new designs needing FPU or USB; LM3S612-IQN50-C2 remains viable for legacy-compatible, cost-sensitive motor control |
Compared with LM3S612-IQN50-C2, LM3S6965-IQC50-C2 adds Ethernet and memory headroom but increases BOM cost and power; TM4C123GH6PM delivers higher compute throughput and FPU support but requires toolchain and firmware migration - both serve distinct scalability tiers within TI's Stellaris/Tiva ecosystem.
Availability
LM3S612-IQN50-C2 is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, PLC I/O modules, and industrial HMI interfaces requiring stable component supply and long-term production support.
Supply support for LM3S612-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 qualification expertise.
The Stellaris LM3S series was engineered for deterministic real-time control in resource-constrained industrial environments - emphasizing low-latency peripherals, robust flash endurance, and integrated analog signal conditioning for motor and sensor interfacing.
FAQ
What is the maximum operating frequency of the LM3S612-IQN50-C2?
The LM3S612-IQN50-C2 operates at a maximum system clock frequency of 50 MHz, achieved using its internal PLL with an external crystal (4–25 MHz) or precision oscillator. This speed is fully supported across all voltage and temperature ranges specified in the SPMS112I datasheet, enabling tight timing loops for motor commutation and sensor sampling without overclocking risk.
Does the LM3S612-IQN50-C2 include an internal temperature sensor?
Yes, the LM3S612-IQN50-C2 integrates a factory-calibrated internal temperature sensor connected to ADC channel 6. Its output is accessible via software-controlled ADC conversion and supports real-time die temperature monitoring for thermal management - a feature confirmed in Section 10.3.7 of the SPMS112I datasheet and used in motor control thermal shutdown routines.
What package type and pin count does the LM3S612-IQN50-C2 use?
The LM3S612-IQN50-C2 uses a 100-pin LQFP package (14 mm × 14 mm, 0.5 mm pitch) with an exposed thermal pad. Pinout details are documented in Section 16 (Pin Diagram) and Section 17 (Signal Tables) of the official SPMS112I datasheet, including dedicated VDD/GND pairs, oscillator inputs, and multi-function GPIO with peripheral mapping.
Can the LM3S612-IQN50-C2 support Modbus RTU communication?
Yes, the LM3S612-IQN50-C2 supports Modbus RTU via its two UART peripherals - one configured as the primary RS-485 transceiver interface and the other reserved for debug or secondary fieldbus. The UARTs provide programmable baud rates, 16-byte FIFOs, and framing control (parity, stop bits), meeting Modbus RTU timing and error-checking requirements as implemented in TI's StellarisWare peripheral driver library.
Is the LM3S612-IQN50-C2 still in active production by Texas Instruments?
Texas Instruments has discontinued the LM3S612-IQN50-C2 as part of the broader Stellaris product line transition to Tiva C Series. However, Aetrix Electronics maintains verified inventory and extended supply chain support for this part, including traceable sourcing and lifecycle coordination - ensuring continued availability for legacy industrial equipment maintenance and production ramp-down phases.
LM3S612-IQN50-C2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 48-LQFP
- Series:
- Stellaris® ARM® Cortex®-M3S 600
- Packaging:
- Tray
- 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:
- 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-C2 FAQ
1.How can I place an order for LM3S612-IQN50-C2 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S612-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 LM3S612-IQN50-C2 reliable?
The price and inventory of LM3S612-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 LM3S612-IQN50-C2 is usually 5 days.
3.What payment methods are accepted for LM3S612-IQN50-C2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S612-IQN50-C2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S612-IQN50-C2?
LM3S612-IQN50-C2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S612-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 LM3S612-IQN50-C2?
For technical support, including LM3S612-IQN50-C2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S612-IQN50-C2 requirements.
6.How does Aetrix verify that LM3S612-IQN50-C2 is sourced from the original manufacturer or authorized distributors?
All LM3S612-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 LM3S612-IQN50-C2 meets industry standards.
7.What is the process for return or replacement of LM3S612-IQN50-C2?
All LM3S612-IQN50-C2 units undergo pre-shipment inspection (PSI). If there is an issue with LM3S612-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 LM3S612-IQN50-C2 part is unused and in its original packaging.
Return procedure for LM3S612-IQN50-C2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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