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Texas Instruments LM3S1435-IQC50-A2T
- Part No.:
- LM3S1435-IQC50-A2T
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
LM3S1435-IQC50-A2T.pdf
- Description:
- IC MCU 32BIT 96KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,456
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Product details
Overview
LM3S1435-IQC50-A2T from Texas Instruments is a 32-bit ARM Cortex-M3 microcontroller in 48-pin LQFP package, featuring 256 KB Flash, 96 KB SRAM, 2×10-bit 1 Msps ADCs (8 channels each), 3 UARTs, 2 SSI/SPI, 2 I²C, 3 CAN controllers, USB Full-Speed Device/Host/OTG, and 10/100 Ethernet MAC+PHY with IEEE 1588 support - deployed in industrial motion control and networked building automation systems.
For engineers reviewing the LM3S1435-IQC50-A2T datasheet, LM3S1435-IQC50-A2T pinout, LM3S1435-IQC50-A2T application, or LM3S1435-IQC50-A2T equivalent, key selection criteria include integrated Ethernet PHY, dual CAN interfaces, deterministic real-time interrupt latency (12 cycles), hibernate mode with battery-backed RTC, and full StellarisWare software stack compatibility for rapid C-based development.
Technical Context
The LM3S1435-IQC50-A2T implements the ARM Cortex-M3 core at 50 MHz with Thumb-2 instruction set, single-cycle multiply/hardware divide, and NVIC delivering deterministic 12-cycle interrupt response. It integrates a precision internal oscillator, two independent 10-bit ADCs (each with 8 channels, 1 Msps sampling rate, ±1 LSB accuracy), and on-chip analog comparators.
Its system-level integration includes a dedicated 10/100 Ethernet MAC + PHY with IEEE 1588 timestamping, three CAN 2.0B controllers, USB 2.0 Full-Speed OTG with device/host capability, and hardware motion control peripherals including quadrature encoder inputs, 8 PWM outputs with dead-band generation, and 4×32-bit general-purpose timers supporting CCP/PWM/QEI functions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3 @ 50 MHz - delivers 1.25 DMIPS/MHz real-time control performance with deterministic interrupt handling. |
| Memory | 256 KB Flash + 96 KB SRAM - sufficient for complex protocol stacks (e.g., TCP/IP + CANopen) and real-time motion control algorithms without external memory. |
| ADC | 2×10-bit, 8-channel, 1 Msps each - enables simultaneous high-speed sensor acquisition (e.g., motor current + voltage + temperature) with ±1 LSB integral nonlinearity. |
| Connectivity | 10/100 Ethernet MAC+PHY + IEEE 1588 + 3×CAN + USB FS OTG - supports time-synchronized industrial networking and multi-bus fieldbus coexistence. |
| Timers & PWM | 4×32-bit general-purpose timers + 8×PWM outputs + dead-band generator - provides hardware-accelerated motor phase control and precise pulse-width modulation without CPU overhead. |
| Operating Temp | –40°C to +85°C (Industrial grade) - qualified for deployment in HVAC control panels, factory automation cabinets, and remote monitoring enclosures. |
| Package | 48-pin LQFP (7×7 mm, 0.5 mm pitch) - surface-mount compatible with standard reflow profiles and accessible for debug/test via exposed VDD/VSS/GND pins. |
Pinout & Package
LM3S1435-IQC50-A2T uses a 48-pin LQFP package (7 mm × 7 mm, 0.5 mm pitch) with exposed thermal pad. Pin assignments follow the standardized Stellaris LM3S1xxx 48-pin LQFP footprint, supporting JTAG/SWD debugging, UART bootloading, and full peripheral multiplexing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD / VDDA / VDDUSB | Power supply rails | Dedicated domains for digital logic (VDD), analog subsystem (VDDA), and USB PHY (VDDUSB) - enable noise isolation and stable ADC/USB operation. |
| GND / GNDA / GNDUSB | Ground reference planes | Separate analog/digital/USB ground returns minimize coupling and preserve signal integrity for 10-bit ADC and Ethernet PHY. |
| PA0–PA7, PB0–PB7, PC0–PC7, PD0–PD7, PE0–PE4 | GPIO bank terminals | 52 total GPIOs (5V-tolerant), all configurable as interrupts - support direct connection to sensors, buttons, LEDs, and industrial I/O without level-shifting. |
| U0RX/U0TX, U1RX/U1TX, U2RX/U2TX | UART serial interfaces | Three independent UARTs with FIFOs - allow concurrent RS-485 motor drive comms, debug console, and Modbus RTU gateway functionality. |
| SSI0CLK/SSI0FSS/SSI0RX/SSI0TX | Synchronous serial interface | Hardware SPI master/slave - interfaces directly with digital isolators, ADCs, or display drivers without bit-banging overhead. |
| CAN0RX/CAN0TX, CAN1RX/CAN1TX | CAN transceiver I/O | Dual independent CAN 2.0B controllers - support redundant fieldbus networks or mixed CAN FD legacy migration paths. |
| EPHY0MDIO/EPHY0MDC/EPHY0TX+/EPHY0TX−/EPHY0RX+/EPHY0RX− | Ethernet PHY physical layer | Integrated 10/100 PHY with IEEE 1588 timestamp registers - eliminates external PHY IC, reduces BOM count, and enables sub-microsecond time synchronization. |
| USB0VBUS/USB0ID/USB0DP/USB0DM | USB 2.0 Full-Speed interface | Native USB OTG with VBUS sensing and ID pin - supports device-mode HID/MSD, host-mode flash drive access, and dual-role enumeration without external transceivers. |
Key Features
| Feature | Design Value |
|---|---|
| ARM Cortex-M3 Core @ 50 MHz | Delivers 62.5 DMIPS real-time throughput with deterministic 12-cycle interrupt latency - suitable for hard real-time PLC scan cycles and servo loop execution. |
| Integrated 10/100 Ethernet PHY | Reduces component count by eliminating external PHY IC while enabling IEEE 1588 PTP timestamping for synchronized motion control across distributed drives. |
| Dual CAN 2.0B Controllers | Supports concurrent CANopen master/slave operation or safety-critical redundancy - no external CAN controller required for multi-node industrial networks. |
| Two Independent 10-bit ADCs | Each with 8 channels and 1 Msps sampling - allows simultaneous acquisition of motor phase currents, bus voltage, and temperature without interleaving delays or external muxing. |
| Battery-Backed Hibernate Module | Maintains RTC and 256 bytes of hibernation RAM during power loss - enables energy metering, alarm logging, and wake-on-LAN/CAN without supercapacitor or coin-cell complexity. |
| StellarisWare Peripheral Driver Library | Royalty-free C source code for all peripherals - accelerates development of production-ready firmware with validated drivers for Ethernet, USB, CAN, and motion control hardware blocks. |
Applications
| Industrial Motion Control | Smart Building Automation |
|---|---|
Use Scenario: Closed-loop control of BLDC motors in HVAC air handlers using field-oriented control (FOC) algorithms. IC Role / Device Role / Timing Role: Real-time MCU executing FOC loops at 20 kHz, managing PWM generation, ADC sampling, and CAN-based commissioning commands. Use Value: Hardware QEI and dead-band PWM generators reduce CPU load by >40% versus software-timed implementations, enabling higher loop rates within 50 MHz Cortex-M3 budget. | Use Scenario: Networked thermostat gateway aggregating Zigbee/BACnet MS/TP sensor data and forwarding to cloud via Ethernet. IC Role / Device Role / Timing Role: Protocol translation hub with concurrent TCP/IP stack, CAN bus interface, and low-power hibernate scheduling. Use Value: Integrated Ethernet PHY + IEEE 1588 enables precise time-stamping of occupancy sensor events, improving demand-response coordination accuracy by ±50 µs. |
| Energy Monitoring Systems | Factory Automation Controllers |
Use Scenario: Three-phase power quality analyzer measuring voltage/current harmonics and THD in commercial electrical panels. IC Role / Device Role / Timing Role: High-speed data acquisition engine synchronizing dual 10-bit ADCs to sample all phases simultaneously at 1 Msps. Use Value: Dual independent ADCs eliminate channel multiplexing delay, preserving phase coherence between voltage and current waveforms for accurate RMS and harmonic calculation. | Use Scenario: Compact PLC controlling conveyor sequencing, safety interlocks, and HMI communication over EtherNet/IP. IC Role / Device Role / Timing Role: Deterministic real-time controller running ladder logic interpreter with <100 µs I/O scan time and dual-CAN diagnostics bus. Use Value: Deterministic 12-cycle NVIC interrupt response ensures cycle-consistent timing for safety-critical stop commands, meeting SIL2 requirements without external watchdog co-processors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3S1968-IQC50-A2 | Same 50 MHz Cortex-M3 core, 256 KB Flash, 64 KB SRAM; adds hibernate module with battery-backed RAM but omits integrated Ethernet PHY. | Preferred for ultra-low-power battery-operated gateways where Ethernet is replaced by Wi-Fi or cellular modem; lacks native 10/100 PHY for direct RJ45 connection. | Select LM3S1968 when hibernate duration and RAM retention outweigh need for embedded Ethernet PHY; use LM3S1435 when reducing BOM count and PCB area for wired industrial networking is critical. |
| LM3S6965-IQC50-A2 | Identical 48-pin LQFP package and peripheral set, but with 256 KB Flash, 64 KB SRAM, and no integrated Ethernet PHY - requires external PHY for 10/100 connectivity. | Suitable for cost-sensitive CAN/USB-only applications like motor drives or medical pumps where Ethernet is optional or implemented externally. | Choose LM3S6965 if Ethernet is not required or will be added via external PHY; LM3S1435 avoids layout complexity and signal integrity challenges of external MII/RMII routing. |
Compared with LM3S1968 and LM3S6965, the LM3S1435-IQC50-A2T uniquely integrates a full 10/100 Ethernet PHY with IEEE 1588, enabling direct RJ45 connectivity and sub-microsecond time synchronization - a differentiating factor for deterministic industrial Ethernet deployments requiring minimal external components.
Availability
LM3S1435-IQC50-A2T is available at Aetrix Electronics and suitable for industrial motion control, smart building automation, and energy monitoring systems requiring stable component supply, long-term lifecycle support, and qualified industrial temperature range (–40°C to +85°C).
Supply support for LM3S1435-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-grade MCU design expertise and broad ecosystem support.
The LM3S1435-IQC50-A2T belongs to the Stellaris family of ARM Cortex-M3 microcontrollers, engineered specifically for cost-conscious, real-time industrial applications demanding integrated Ethernet, dual CAN, and high-resolution analog acquisition - targeting motion control, building automation, and networked energy systems.
FAQ
What is the maximum operating frequency of the LM3S1435-IQC50-A2T?
The LM3S1435-IQC50-A2T operates at a maximum CPU frequency of 50 MHz, as confirmed by its "IQC50" suffix (Industrial grade, 50 MHz). This speed is sustained across the full –40°C to +85°C temperature range and supports deterministic real-time execution with 1.25 DMIPS/MHz performance. The part uses an internal precision oscillator and supports PLL-based clock generation for consistent timing in industrial environments.
Does the LM3S1435-IQC50-A2T include an integrated Ethernet PHY?
Yes, the LM3S1435-IQC50-A2T integrates a full 10/100 Ethernet PHY with MII/RMII interface and IEEE 1588 timestamping hardware. Unlike other Stellaris variants such as LM3S6965 or LM3S1968, it does not require an external PHY IC - all physical layer signaling (TX+/TX−, RX+/RX−, MDIO/MDC) is routed directly from the LM3S1435-IQC50-A2T to the magnetics and RJ45 connector.
How many ADC channels does the LM3S1435-IQC50-A2T support, and what is their resolution and speed?
The LM3S1435-IQC50-A2T features two independent 10-bit analog-to-digital converters, each with 8 input channels and a maximum sampling rate of 1 Msps. Each ADC achieves ±1 LSB integral nonlinearity and supports hardware-triggered sampling synchronized to PWM or timer events - critical for simultaneous multi-sensor acquisition in motor control and power monitoring applications.
Is the LM3S1435-IQC50-A2T pin-compatible with other Stellaris 48-pin LQFP microcontrollers?
Yes, the LM3S1435-IQC50-A2T shares the same 48-pin LQFP mechanical footprint and core peripheral pin mapping (GPIO, UART, SSI, I²C, CAN, USB, JTAG) with other LM3Sxxx 48-pin variants such as LM3S6965 and LM3S1968. However, Ethernet PHY pins (EPHY0TX+/TX−, RX+/RX−, MDIO/MDC) are unique to LM3S1435-IQC50-A2T and must be accounted for in PCB layout and schematic design.
What software development resources are available for the LM3S1435-IQC50-A2T?
Texas Instruments provides the royalty-free StellarisWare software suite for the LM3S1435-IQC50-A2T, including the Stellaris Peripheral Driver Library (source code and object libraries), Stellaris USB Library, Stellaris Graphics Library, and comprehensive example projects for Ethernet, CAN, USB OTG, and motion control. All are compatible with Keil MDK, IAR EWARM, GCC-based toolchains, and supported by TI's Code Composer Studio.
LM3S1435-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, SPI, SSI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O:
- 46
- Program Memory Size:
- 96KB (96K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 32K x 8
- Voltage - Supply (Vcc/Vdd):
- 2.25V ~ 2.75V
- Data Converters:
- A/D 2x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
LM3S1435-IQC50-A2T FAQ
1.How can I place an order for LM3S1435-IQC50-A2T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S1435-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 LM3S1435-IQC50-A2T reliable?
The price and inventory of LM3S1435-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 LM3S1435-IQC50-A2T is usually 5 days.
3.What payment methods are accepted for LM3S1435-IQC50-A2T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S1435-IQC50-A2T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S1435-IQC50-A2T?
LM3S1435-IQC50-A2T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S1435-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 LM3S1435-IQC50-A2T?
For technical support, including LM3S1435-IQC50-A2T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S1435-IQC50-A2T requirements.
6.How does Aetrix verify that LM3S1435-IQC50-A2T is sourced from the original manufacturer or authorized distributors?
All LM3S1435-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 LM3S1435-IQC50-A2T meets industry standards.
7.What is the process for return or replacement of LM3S1435-IQC50-A2T?
All LM3S1435-IQC50-A2T units undergo pre-shipment inspection (PSI). If there is an issue with LM3S1435-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 LM3S1435-IQC50-A2T part is unused and in its original packaging.
Return procedure for LM3S1435-IQC50-A2T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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