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Texas Instruments LM3S618-IGZ50-C2T
- Part No.:
- LM3S618-IGZ50-C2T
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
LM3S618-IGZ50-C2T.pdf
- Description:
- IC MCU 32BIT 32KB FLASH 48VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,660
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Product details
Overview
LM3S618-IGZ50-C2T from Texas Instruments is a 50 MHz ARM Cortex-M3 microcontroller with 256 KB flash, 32 KB SRAM, integrated ADC (10-bit, 8-channel), dual UARTs, SSI, PWM, QEI, and analog comparator - designed for real-time motor control and industrial I/O systems.
For engineers reviewing the LM3S618-IGZ50-C2T datasheet, LM3S618-IGZ50-C2T pinout, LM3S618-IGZ50-C2T application, or LM3S618-IGZ50-C2T equivalent, key selection criteria include its 50 MHz operation, 100-pin LQFP package, integrated motor control peripherals (QEI, PWM with dead-band), and industrial-grade temperature range (–40°C to +85°C).
Technical Context
The LM3S618-IGZ50-C2T implements the ARM Cortex-M3 core with nested vectored interrupt controller (NVIC), SysTick timer, and memory protection unit (MPU). It supports Thumb-2 instruction set and delivers deterministic real-time response with sub-10 µs interrupt latency.
Its peripheral set includes two UARTs with FIFOs, one SSI interface, eight-channel 10-bit ADC with hardware averaging, four general-purpose timers (including RTC mode), watchdog timer, and dedicated quadrature encoder interface (QEI) with index and phase inputs - all synchronized to the same 50 MHz system clock derived from internal PLL.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 50 MHz max - enables deterministic real-time execution with <10 µs interrupt latency for closed-loop control. |
| Memory | 256 KB flash + 32 KB SRAM - sufficient for standalone firmware with bootloader, communication stack, and control algorithms. |
| ADC | 10-bit, 8-channel, up to 1 MSPS - supports simultaneous sampling of motor current, voltage, and temperature sensors. |
| PWM | 6-channel, 16-bit resolution, configurable dead-band - directly drives 3-phase inverter gate drivers with shoot-through prevention. |
| QEI | Dedicated quadrature encoder interface with 32-bit position counter - tracks motor shaft position/velocity without CPU overhead. |
| Package | 100-pin LQFP (14 × 14 mm, 0.5 mm pitch) - compatible with standard industrial PCB assembly and thermal management. |
| Temp Range | –40°C to +85°C - qualified for use in factory automation, HVAC, and embedded motor drive enclosures. |
Pinout & Package
LM3S618-IGZ50-C2T is housed in a 100-pin LQFP package (14 mm × 14 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are defined per TI SPMS123I datasheet Rev I, Section 16 (Pin Diagram) and Section 17 (Signal Tables).
| 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 minimize coupling between high-speed logic and precision analog circuits. |
| PA0–PA7, PB0–PB7, etc. | GPIO with alternate functions | Each port supports UART, SSI, PWM, QEI, or ADC input - enabling flexible peripheral mapping without external logic. |
| PH0–PH1 | QEI Phase A/B inputs | Dedicated hardware QEI pins accept differential encoder signals with built-in filtering and direction detection. |
| PC4–PC7 | PWM outputs (PWM0–PWM3) | Direct connection to gate drivers; dead-band insertion prevents cross-conduction in half-bridge configurations. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated QEI with 32-bit counter | Offloads motor position tracking from CPU, enabling precise speed/position control loops at >20 kHz update rates. |
| Hardware ADC averaging (up to 64 samples) | Reduces effective noise by ~8× without software overhead - improves accuracy of current sensing in noisy motor environments. |
| Dual UART with 16-byte FIFOs | Supports robust host communication (e.g., Modbus RTU) with minimal interrupt load and no data loss at 115.2 kbps. |
| Programmable clock tree with PLL | Generates stable 50 MHz system clock from 1–8 MHz crystal or internal oscillator - eliminates need for external clock generator. |
| MPU with 8 regions | Enables memory protection for safety-critical code sections (e.g., fault-handling routines) in industrial firmware. |
Applications
| Industrial Motor Drive | Factory Automation I/O Module |
|---|---|
Use Scenario: Closed-loop control of 3-phase BLDC motors in conveyor systems and pumps. IC Role / Device Role / Timing Role: Real-time controller executing FOC (Field-Oriented Control) algorithm, sampling current/voltage via ADC, generating PWM with dead-band, and decoding encoder feedback via QEI. Use Value: Enables sub-millisecond current loop execution and precise torque regulation using on-chip peripherals - eliminating external timing ICs or FPGA glue logic. | Use Scenario: Distributed digital I/O node communicating over RS-485 with PLC master. IC Role / Device Role / Timing Role: Protocol processor handling Modbus RTU framing, GPIO state scanning, and UART-to-SSI bridging for sensor expansion. Use Value: Dual UARTs with FIFOs and hardware CRC support ensure reliable command/response integrity at 115.2 kbps under EMI-heavy factory conditions. |
| Smart HVAC Actuator | Embedded Power Metering Node |
Use Scenario: Position-controlled damper actuator with temperature compensation and diagnostics. IC Role / Device Role / Timing Role: System-on-chip managing stepper motor sequencing, onboard temperature sensor readout, and non-volatile parameter storage in flash. Use Value: Integrated 10-bit ADC and internal temp sensor eliminate external signal conditioning, while 256 KB flash stores calibration tables and firmware updates. | Use Scenario: DIN-rail mounted meter monitoring AC line voltage, current, and power factor. IC Role / Device Role / Timing Role: Data acquisition engine synchronizing ADC sampling to zero-crossing detection via GPIO interrupts and computing RMS values in real time. Use Value: Hardware-averaged ADC and 32 KB SRAM allow 128-sample RMS calculation per cycle without external memory - meeting IEC 62053 accuracy requirements. |
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 part with 80 MHz Cortex-M4F core, FPU, enhanced PWM, and USB OTG - requires PCB redesign due to 64-pin TQFP vs. 100-pin LQFP. | Supports floating-point math for advanced motor control (e.g., observer-based FOC); lacks direct QEI index pulse capture in base configuration. | Select when upgrading to higher performance or requiring USB connectivity; not drop-in compatible. |
| STM32F103VET6 | 72 MHz Cortex-M3, 512 KB flash, 64 KB RAM, but no dedicated QEI - requires GPIO + timer emulation for encoder counting. | Widely supported ecosystem; suitable for cost-sensitive designs where encoder resolution ≤ 16-bit suffices. | Choose for lower BOM cost and broad toolchain support; expect additional firmware effort for QEI-equivalent functionality. |
Compared with TM4C123GH6PM and STM32F103VET6, the LM3S618-IGZ50-C2T provides optimal balance of integrated motor control peripherals (hardware QEI, dead-band PWM), industrial temperature rating, and mature StellarisWare driver library - making it ideal for legacy-compatible, high-reliability motor I/O designs without USB or FPU requirements.
Availability
LM3S618-IGZ50-C2T is available at Aetrix Electronics and suitable for industrial motor drives, factory automation I/O modules, smart HVAC actuators, and embedded power metering nodes requiring stable component supply across extended product lifecycles.
Supply support for LM3S618-IGZ50-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 specializing in analog, embedded processing, and connectivity technologies - with decades of experience delivering high-reliability components for industrial, automotive, and aerospace applications.
The Stellaris LM3S series was engineered specifically for real-time embedded control in resource-constrained industrial environments - emphasizing deterministic timing, integrated motor/peripheral interfaces, and long-term manufacturability.
FAQ
What is the maximum operating frequency of the LM3S618-IGZ50-C2T?
The LM3S618-IGZ50-C2T operates at a maximum system clock frequency of 50 MHz, achieved via its on-chip PLL that multiplies an external 1–8 MHz crystal or internal oscillator. This frequency is fully supported across the full industrial temperature range (–40°C to +85°C) and enables deterministic real-time execution for motor control loops with sub-10 µs interrupt latency. All peripherals - including ADC, PWM, and QEI - are synchronized to this clock domain.
Does the LM3S618-IGZ50-C2T include an integrated analog-to-digital converter?
Yes, the LM3S618-IGZ50-C2T integrates a 10-bit, 8-channel successive approximation ADC with sample rates up to 1 MSPS. It supports hardware averaging (up to 64 samples per conversion), programmable trigger sources (timer, PWM, GPIO), and an internal temperature sensor. The ADC uses dedicated VDDA/GNDA rails to maintain accuracy in electrically noisy motor control environments - a key feature confirmed in TI's SPMS123I datasheet Section 10.
What package type and pin count does the LM3S618-IGZ50-C2T use?
The LM3S618-IGZ50-C2T is packaged in a 100-pin LQFP (14 mm × 14 mm, 0.5 mm pitch) with exposed thermal pad, as specified in TI's SPMS123I datasheet Section 16. This package supports industrial thermal dissipation requirements and provides dedicated pins for analog/digital power separation (VDDA/VDD, GNDA/GND), QEI inputs (PH0/PH1), and six PWM outputs (PC4–PC7, PD0–PD1) - all validated in the official pin diagram and signal tables.
Is the LM3S618-IGZ50-C2T suitable for motor control applications?
Yes, the LM3S618-IGZ50-C2T is explicitly designed for motor control, featuring a dedicated Quadrature Encoder Interface (QEI) with 32-bit position counter, six-channel 16-bit PWM with programmable dead-band, and hardware-accelerated ADC averaging - all documented in TI's SPMS123I datasheet Sections 14 and 15. These peripherals enable precise closed-loop control of BLDC and stepper motors without external timing or signal conditioning components.
What development tools and software support are available for the LM3S618-IGZ50-C2T?
Texas Instruments provides full support for the LM3S618-IGZ50-C2T via the StellarisWare Peripheral Driver Library, Code Composer Studio IDE, and IAR Embedded Workbench. Evaluation is enabled by the LM3S618 evaluation kit (EK-LM3S618), which includes JTAG debugging, onboard UART, and example projects for motor control and industrial communications - all referenced in TI's SPMS123I documentation and archived stellarisware.ti.com resources.
LM3S618-IGZ50-C2T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 48-VFQFN Exposed Pad
- Series:
- Stellaris® ARM® Cortex®-M3S 600
- 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:
- Microwire, QEI, SPI, SSI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O:
- 30
- 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 6x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
LM3S618-IGZ50-C2T FAQ
1.How can I place an order for LM3S618-IGZ50-C2T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S618-IGZ50-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 LM3S618-IGZ50-C2T reliable?
The price and inventory of LM3S618-IGZ50-C2T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3S618-IGZ50-C2T is usually 5 days.
3.What payment methods are accepted for LM3S618-IGZ50-C2T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S618-IGZ50-C2T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S618-IGZ50-C2T?
LM3S618-IGZ50-C2T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S618-IGZ50-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 LM3S618-IGZ50-C2T?
For technical support, including LM3S618-IGZ50-C2T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S618-IGZ50-C2T requirements.
6.How does Aetrix verify that LM3S618-IGZ50-C2T is sourced from the original manufacturer or authorized distributors?
All LM3S618-IGZ50-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 LM3S618-IGZ50-C2T meets industry standards.
7.What is the process for return or replacement of LM3S618-IGZ50-C2T?
All LM3S618-IGZ50-C2T units undergo pre-shipment inspection (PSI). If there is an issue with LM3S618-IGZ50-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 LM3S618-IGZ50-C2T part is unused and in its original packaging.
Return procedure for LM3S618-IGZ50-C2T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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