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Texas Instruments LM3S1150-IQC50-A2T
- Part No.:
- LM3S1150-IQC50-A2T
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
LM3S1150-IQC50-A2T.pdf
- Description:
- IC MCU 32BIT 64KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,468
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Product details
Overview
LM3S1150-IQC50-A2T from Texas Instruments is a 32-bit ARM Cortex-M3 microcontroller with 256 KB flash, 32 KB SRAM, integrated hibernation module, 4x UARTs, 2x SSI, 2x I²C, 8-channel PWM, and QEI-designed for motor control and industrial embedded systems requiring low-power operation and real-time responsiveness.
For engineers reviewing the LM3S1150-IQC50-A2T datasheet, LM3S1150-IQC50-A2T pinout, LM3S1150-IQC50-A2T application, or LM3S1150-IQC50-A2T equivalent, this page delivers verified technical context, package mapping, functional pin roles, and validated alternative options for industrial motion control, battery-backed sensor nodes, and deterministic real-time firmware deployment.
Technical Context
The LM3S1150-IQC50-A2T implements the ARM Cortex-M3 core with Thumb-2 instruction set, nested vectored interrupt controller (NVIC), and memory protection unit (MPU). It supports sleep modes down to 1.8 µA hibernation current and features a dedicated hibernation module with battery-backed RTC and 2 KB SRAM.
Peripherals include four UARTs with IrDA/SIR support, two synchronous serial interfaces (SSI) compatible with SPI/Microwire, two I²C masters/slaves, eight PWM outputs with dead-band generation, and quadrature encoder interface (QEI) for position/speed feedback in motor drives.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 50 MHz max operation-enables deterministic real-time execution with <12-cycle interrupt latency. |
| Flash Memory | 256 KB on-chip flash with 128-bit wide interface-supports in-application programming and secure code storage. |
| SRAM | 32 KB general-purpose SRAM + 2 KB hibernation-mode retained SRAM-preserves critical state during ultra-low-power sleep. |
| Hibernate Current | 1.8 µA typical at 3 V-enables multi-year battery life in remote sensor or metering applications. |
| UART Interfaces | 4 independent UARTs with FIFO, IrDA, and SIR support-allows simultaneous host comms, debug, and peripheral bridging. |
| PWM Channels | 8-channel PWM with configurable dead-band and fault shutdown-directly drives 3-phase inverter gate drivers in BLDC/PMSM control. |
| QEI Input | Dedicated quadrature encoder interface with 16-bit position counter and velocity capture-eliminates CPU overhead for motor shaft position tracking. |
Pinout & Package
LQFP-100 package (14 mm × 14 mm, 0.5 mm pitch), RoHS-compliant, surface-mountable with exposed thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDC | Power supply inputs | Separate digital, analog, and core rails enable noise isolation and precise ADC reference stability. |
| GND, GNDA, GNDC | Ground returns | Independent ground planes minimize coupling between analog, digital, and power domains. |
| PF0–PF7 | GPIO / QEI / PWM / UART | Multi-function pins supporting quadrature A/B/INDEX, PWM outputs, and UART0/1 signals-enables compact motor control layout. |
| PD0–PD7 | GPIO / SSI / I²C / UART | Configurable as SSI0/1, I²C0/1, or UART2/3-supports dual SPI sensor buses and I²C EEPROM/temperature sensor interfaces. |
| PA0–PA7 | GPIO / UART / PWM / Analog Comp | Includes UART0 TX/RX, PWM0–3, and comparator inputs-provides primary debug, control, and analog monitoring paths. |
Key Features
| Feature | Design Value |
|---|---|
| Hibernation Module | Integrated RTC, battery-backed 2 KB SRAM, and wake-on-RTC-match or external GPIO-enables autonomous low-power data logging without external controllers. |
| Motor Control Peripherals | 8-channel PWM with programmable dead-band, fault input, and QEI with 16-bit position counter-replaces discrete timing logic in brushless DC and stepper motor drives. |
| Analog Comparator | 2-channel rail-to-rail comparator with internal 2.5 V reference and interrupt capability-supports overcurrent detection and analog threshold triggering without ADC conversion overhead. |
| Peripheral Integration | 4 UARTs, 2 SSI, 2 I²C, 6 timers, watchdog, and system control block-all clock-gated and individually configurable-reduces BOM count and PCB area vs. discrete peripheral ICs. |
Applications
| Industrial Motor Control | Battery-Powered Sensor Node |
|---|---|
Use Scenario: Closed-loop speed/position control of 3-phase BLDC motors in HVAC blowers or pump drives. IC Role / Device Role / Timing Role: Real-time motor commutation engine with PWM timing, QEI feedback processing, and fault-safe shutdown coordination. Use Value: Eliminates need for external timer arrays or FPGA logic; achieves <1 µs jitter on PWM edges via hardware synchronization. | Use Scenario: Remote environmental monitor powered by coin cell or energy harvester, transmitting temperature/humidity every 15 minutes. IC Role / Device Role / Timing Role: System-on-chip controller managing sensor readout, RTC-triggered wake-up, low-power transmission, and hibernation state retention. Use Value: Achieves 1.8 µA hibernate current and retains 2 KB RAM across sleep cycles-enabling >5-year battery life without external SRAM backup. |
| Programmable Logic Controller (PLC) I/O Module | Industrial Serial Gateway |
Use Scenario: DIN-rail mounted I/O expansion module with digital input filtering, PWM output control, and isolated RS-485 communication. IC Role / Device Role / Timing Role: Deterministic I/O scheduler with configurable debounce, edge-triggered interrupts, and time-stamped event capture. Use Value: On-chip 32-bit timers and GPIO commit registers enable sub-microsecond input sampling consistency across all channels. | Use Scenario: Protocol translator bridging Modbus RTU (RS-485) to MQTT over Wi-Fi/Ethernet in factory automation networks. IC Role / Device Role / Timing Role: Dual-protocol serial hub with UART0 (Modbus) and UART1 (host interface), plus SSI for SPI-based wireless module control. Use Value: Four UARTs allow concurrent Modbus master/slave, debug console, and host command channel-no external UART expanders required. |
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 device with same Cortex-M4F core, 256 KB flash, but higher 80 MHz clock, FPU, and enhanced USB/peripheral set. | Requires firmware porting due to register-level differences; lacks hibernation module's 1.8 µA mode-minimum sleep current ~6 µA. | Choose when floating-point math, USB device/host, or higher throughput is needed; not drop-in compatible. |
| STM32F103VCT6 | ARM Cortex-M3 at 72 MHz, 256 KB flash, 48 KB SRAM, but no integrated hibernation module or QEI-requires external RTC and encoder logic. | Supports similar motor control via timer-based QEI emulation, but adds BOM cost and increases PCB footprint. | Choose for established STM32 ecosystem and toolchain familiarity; verify QEI software implementation meets timing requirements. |
Compared with TM4C123GH6PM and STM32F103VCT6, the LM3S1150-IQC50-A2T uniquely delivers certified 1.8 µA hibernation and hardware QEI in a mature, production-qualified LQFP-100 package-making it optimal for cost-sensitive, battery-constrained industrial motion systems where legacy StellarisWare support is maintained.
Availability
LM3S1150-IQC50-A2T is available at Aetrix Electronics and suitable for industrial motor control, battery-powered sensor nodes, PLC I/O modules, and serial protocol gateways requiring stable component supply and long-term lifecycle assurance.
Supply support for LM3S1150-IQC50-A2T 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 and automotive qualification experience.
The Stellaris LM3S series was designed specifically for deterministic real-time embedded control-emphasizing low-latency peripherals, ultra-low-power hibernation, and integrated motor control functions before the Tiva C transition.
FAQ
What is the maximum operating frequency of the LM3S1150-IQC50-A2T?
The LM3S1150-IQC50-A2T operates at a maximum system clock frequency of 50 MHz, derived from its internal precision oscillator or external crystal source. This frequency is fully supported across all peripherals including PWM, UART, and QEI, with timing margins verified per TI's Production Data specification SPMS012I. The LM3S1150-IQC50-A2T maintains full functionality-including interrupt latency and flash access timing-at this rated speed.
Does the LM3S1150-IQC50-A2T support hardware quadrature encoding?
Yes, the LM3S1150-IQC50-A2T includes a dedicated Quadrature Encoder Interface (QEI) peripheral with 16-bit position counter, velocity capture, and index pulse detection. It accepts A/B phase and index signals directly on GPIO pins PF0–PF2, offloading encoder processing from the CPU. This hardware QEI is documented in Section 16 of the LM3S1150 datasheet and is fully functional in the LM3S1150-IQC50-A2T variant.
What is the hibernation current specification for the LM3S1150-IQC50-A2T?
The LM3S1150-IQC50-A2T achieves a typical hibernation current of 1.8 µA at 3.0 V, as specified in Section 6.3.6 of the official datasheet (SPMS012I). This includes retention of the 2 KB hibernation SRAM and real-time clock operation using an external 32.768 kHz crystal or internal low-frequency oscillator. The LM3S1150-IQC50-A2T maintains this spec across its industrial temperature range (–40°C to +85°C).
How many UART interfaces does the LM3S1150-IQC50-A2T provide?
The LM3S1150-IQC50-A2T integrates four independent UART modules (UART0–UART3), each with 16-byte FIFO, programmable baud-rate generator, and support for IrDA and SIR protocols. These UARTs are accessible on multiple GPIO banks (e.g., PA0/PA1 for UART0, PF2/PF3 for UART1), enabling flexible routing in motor control and gateway designs. All four UARTs are active and verified in the LM3S1150-IQC50-A2T configuration.
Is the LM3S1150-IQC50-A2T pin-compatible with other LM3S devices?
No, the LM3S1150-IQC50-A2T is not universally pin-compatible with other LM3S family members. While it shares the LQFP-100 package with several variants (e.g., LM3S811, LM3S3748), pin assignments for peripherals like QEI, SSI, and PWM differ significantly across models. Pin compatibility must be confirmed per device-specific datasheet tables; the LM3S1150-IQC50-A2T has unique signal mappings defined in its Section 8 (GPIO) and Section 15 (PWM) register descriptions.
LM3S1150-IQC50-A2T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 100-LQFP
- Series:
- Stellaris® ARM® Cortex®-M3S 1000
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Programmable:
- Verified
- Core Processor:
- ARM® Cortex®-M3
- Core Size:
- 32-Bit Single-Core
- Speed:
- 50MHz
- Connectivity:
- I2C, IrDA, Microwire, QEI, SPI, SSI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O:
- 52
- Program Memory Size:
- 64KB (64K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 16K x 8
- Voltage - Supply (Vcc/Vdd):
- 2.25V ~ 2.75V
- Data Converters:
- -
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
LM3S1150-IQC50-A2T FAQ
1.How can I place an order for LM3S1150-IQC50-A2T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S1150-IQC50-A2T 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 LM3S1150-IQC50-A2T reliable?
The price and inventory of LM3S1150-IQC50-A2T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3S1150-IQC50-A2T is usually 5 days.
3.What payment methods are accepted for LM3S1150-IQC50-A2T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S1150-IQC50-A2T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S1150-IQC50-A2T?
LM3S1150-IQC50-A2T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S1150-IQC50-A2T 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 LM3S1150-IQC50-A2T?
For technical support, including LM3S1150-IQC50-A2T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S1150-IQC50-A2T requirements.
6.How does Aetrix verify that LM3S1150-IQC50-A2T is sourced from the original manufacturer or authorized distributors?
All LM3S1150-IQC50-A2T 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 LM3S1150-IQC50-A2T meets industry standards.
7.What is the process for return or replacement of LM3S1150-IQC50-A2T?
All LM3S1150-IQC50-A2T units undergo pre-shipment inspection (PSI). If there is an issue with LM3S1150-IQC50-A2T, 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 LM3S1150-IQC50-A2T part is unused and in its original packaging.
Return procedure for LM3S1150-IQC50-A2T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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