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Texas Instruments LM3S6432-IQC50-A2
- Part No.:
- LM3S6432-IQC50-A2
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
LM3S6432-IQC50-A2.pdf
- Description:
- IC MCU 32BIT 96KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LM3S6432-IQC50-A2 from Texas Instruments is a 32-bit ARM Cortex-M3 microcontroller with 256 KB flash, 32 KB SRAM, integrated Ethernet MAC, dual UARTs, I²C, SSI, ADC (10-bit, 8-channel), PWM, and analog comparators. It operates at 50 MHz and supports industrial temperature range (–40°C to +85°C) in a 100-pin LQFP package. Used in networked industrial controllers requiring real-time control and wired connectivity.
For engineers reviewing the LM3S6432-IQC50-A2 datasheet, LM3S6432-IQC50-A2 pinout, LM3S6432-IQC50-A2 application, or LM3S6432-IQC50-A2 equivalent, key selection criteria include Ethernet MAC integration, 50 MHz CPU clock, 100-pin LQFP footprint, industrial temperature rating, and StellarisWare® software support for rapid firmware development.
Technical Context
The LM3S6432-IQC50-A2 implements the ARM Cortex-M3 core with Thumb-2 instruction set, nested vectored interrupt controller (NVIC), and memory protection unit (MPU). It integrates a full IEEE 802.3-compliant Ethernet MAC with MII interface, enabling direct connection to external PHYs without external glue logic.
Peripherals include two UARTs supporting IrDA and hardware flow control, one I²C master/slave controller, two SSI modules for SPI/SSI/Microwire, a 10-bit 1-MSPS ADC with four sample sequencers, and six PWM generator blocks with fault handling-targeting motor control and power management applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 32-bit RISC, executes Thumb-2 instructions for compact code size and deterministic real-time response. |
| Max Clock Speed | 50 MHz - enables deterministic execution of control loops within ≤20 ns per instruction cycle. |
| Flash Memory | 256 KB - sufficient for bootloader, protocol stacks (TCP/IP, Modbus), and application firmware with field-upgrade capability. |
| SRAM | 32 KB - supports Ethernet packet buffering, RTOS kernel structures, and real-time data buffers without external RAM. |
| Operating Temp | –40°C to +85°C - qualified for deployment in uncontrolled industrial enclosures and factory-floor environments. |
| Package | 100-pin LQFP (14 × 14 mm, 0.5 mm pitch) - compatible with standard surface-mount assembly and offers full peripheral pin access. |
| Ethernet Interface | Integrated IEEE 802.3 MAC with MII - eliminates need for external MAC chip and reduces BOM count and PCB area. |
Pinout & Package
LM3S6432-IQC50-A2 is housed in a 100-pin LQFP (Pb-free, RoHS-compliant) with exposed thermal pad. Pinout supports full multiplexing of GPIO, UART, I²C, SSI, PWM, ADC, and Ethernet MII signals across dedicated and shared pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDC | Power Supply Inputs | Digital core (VDDC), analog (VDDA), and I/O (VDD) rails require independent 3.3 V regulation with local decoupling for noise isolation. |
| PA0–PA7, PB0–PB7, etc. | GPIO Ports A–F | 56 total GPIOs; each port supports digital input/output, interrupt-on-change, and peripheral function multiplexing (e.g., UART0RX on PA0). |
| RMII_TXD0, RMII_TXD1 | Ethernet MAC Transmit Data | Direct connection to RMII-compliant PHY; no external serializer required - simplifies 10/100 Mbps Ethernet physical layer design. |
| UART0_RX, UART0_TX | Asynchronous Serial Interface | Full-duplex UART with programmable baud rate, FIFO, and IrDA encoding - supports debugging, host communication, and Modbus RTU. |
| SSI0_CLK, SSI0_FSS | Synchronous Serial Interface | Configurable master/slave SPI interface for connecting sensors, displays, or DACs with up to 10 MHz clock rate. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Ethernet MAC | Reduces system component count by eliminating external MAC IC; supports MII/RMII for flexible PHY selection and PCB layout optimization. |
| Hardware-accelerated PWM | Six independent PWM generator blocks with dead-band insertion and fault shutdown - enables precise motor phase control and power converter timing. |
| Four ADC Sample Sequencers | Allows concurrent sampling of up to eight analog channels with configurable trigger sources (timer, GPIO, software), reducing firmware overhead in sensor monitoring. |
| StellarisWare® Peripheral Driver Library | Production-ready C APIs abstract register-level complexity - accelerates development of UART, Ethernet, and PWM drivers without low-level bit manipulation. |
| Memory Protection Unit (MPU) | Enables secure partitioning of flash/SRAM into privileged/unprivileged regions - supports robust firmware architecture with fault containment in safety-critical tasks. |
Applications
| Industrial PLC Controller | Building Automation Gateway |
|---|---|
Use Scenario: Standalone DIN-rail-mounted controller executing ladder logic and communicating via Modbus TCP over Ethernet. IC Role / Device Role / Timing Role: Central processing unit running real-time OS, managing I/O scanning, protocol stack, and Ethernet packet handling. Use Value: Integrated Ethernet MAC and 50 MHz Cortex-M3 enable sub-10 ms scan cycles with deterministic TCP/IP stack execution in resource-constrained edge nodes. | Use Scenario: HVAC gateway aggregating BACnet MS/TP sensor data and bridging to IP-based building management systems. IC Role / Device Role / Timing Role: Protocol translator and network interface controller with dual UARTs for legacy bus interfacing and Ethernet for upstream connectivity. Use Value: Dual UARTs with hardware flow control and integrated TCP/IP stack reduce latency and eliminate external bridge ICs, lowering bill-of-materials cost. |
| Networked Motor Drive | Factory Floor HMI Controller |
Use Scenario: Compact servo drive with position feedback, current sensing, and EtherNet/IP command interface. IC Role / Device Role / Timing Role: Real-time motion controller coordinating PWM generation, ADC sampling, and Ethernet cyclic I/O exchange. Use Value: Hardware PWM fault protection and synchronized ADC sampling ensure safe torque limiting and current loop stability during network-induced jitter. | Use Scenario: Touch-enabled panel controller displaying machine status and accepting operator inputs via local GPIO and remote commands via Ethernet. IC Role / Device Role / Timing Role: Embedded application processor managing display refresh, button debouncing, and web server serving diagnostic pages. Use Value: 32 KB SRAM accommodates embedded web server buffers and graphics frame buffer, while 256 KB flash stores firmware and localized UI assets. |
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 core and package, but includes USB 2.0 OTG controller and 512 KB flash; lacks Ethernet MAC. | Better suited for USB-hosted human interface or firmware update applications; not suitable where Ethernet is mandatory. | Select LM3S6965-IQC50-A2 only if USB connectivity outweighs Ethernet requirement and additional flash is needed. |
| TM4C123GH6PM | Successor series with enhanced peripherals (USB, CAN), higher clock (80 MHz), and updated StellarisWare compatibility; pin-compatible in 64-pin LQFP variant only - not pin-compatible with LM3S6432-IQC50-A2's 100-pin LQFP. | Supports CAN bus for automotive diagnostics and newer USB device classes; requires PCB redesign due to different pin count and layout. | Choose TM4C123GH6PM for new designs needing extended lifecycle support and CAN/USB; retain LM3S6432-IQC50-A2 for legacy Ethernet-centric designs with existing 100-pin LQFP layout. |
Compared with LM3S6965-IQC50-A2 and TM4C123GH6PM, the LM3S6432-IQC50-A2 uniquely balances Ethernet MAC integration, industrial temperature rating, and mature StellarisWare toolchain support - making it optimal for cost-sensitive, Ethernet-dependent industrial control where USB or CAN are unnecessary.
Availability
LM3S6432-IQC50-A2 is available at Aetrix Electronics and suitable for industrial PLC controllers, building automation gateways, networked motor drives, and factory floor HMI controllers requiring stable component supply and long-term production continuity.
Supply support for LM3S6432-IQC50-A2 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, embedded processing, and wireless technologies for industrial, automotive, and consumer applications.
The Stellaris LM3S family was designed specifically for cost-effective, real-time embedded control with integrated connectivity - targeting industrial automation, building systems, and networked equipment where Ethernet, deterministic timing, and peripheral integration reduce system complexity.
FAQ
What is the maximum operating frequency of the LM3S6432-IQC50-A2?
The LM3S6432-IQC50-A2 operates at a maximum CPU clock frequency of 50 MHz. This speed is achieved using an internal PLL that multiplies the input crystal or oscillator frequency, and it is fully supported across the specified industrial temperature range (–40°C to +85°C). The LM3S6432-IQC50-A2 maintains timing compliance and flash execution performance at this rate without derating.
Does the LM3S6432-IQC50-A2 include an integrated Ethernet physical layer (PHY)?
No, the LM3S6432-IQC50-A2 integrates only the Ethernet Media Access Control (MAC) layer. It requires an external PHY chip connected via MII or RMII interface. The LM3S6432-IQC50-A2 provides all MAC registers, DMA, and packet buffering - but does not include analog transceivers, line drivers, or auto-negotiation logic found in PHY devices.
Is the LM3S6432-IQC50-A2 pin-compatible with other Stellaris LM3S devices?
The LM3S6432-IQC50-A2 uses a 100-pin LQFP package with a specific pinout defined in its datasheet. While some LM3S devices share the same package size, pin functions and allocations differ significantly across variants (e.g., LM3S6965 has different peripheral mappings and no Ethernet pins). Therefore, the LM3S6432-IQC50-A2 is not pin-compatible with other LM3S parts unless explicitly documented as such in TI's migration guides.
What development tools support the LM3S6432-IQC50-A2?
The LM3S6432-IQC50-A2 is supported by Texas Instruments' Code Composer Studio™ IDE, IAR Embedded Workbench for ARM, and Keil µVision. It also works with StellarisWare® peripheral driver libraries, evaluation kits like the EK-LM3S6965, and In-Circuit Debug Interfaces (JTAG/SWD) via TI's XDS100v2 or third-party debug probes. All tools target the ARM Cortex-M3 core used in the LM3S6432-IQC50-A2.
What is the flash endurance and data retention specification for the LM3S6432-IQC50-A2?
The LM3S6432-IQC50-A2 flash memory is rated for a minimum of 10,000 erase/write cycles and guarantees data retention for 20 years at +85°C or 40 years at +25°C. These specifications are validated per Texas Instruments' production test flow and apply to the on-chip 256 KB flash array used for program storage and nonvolatile configuration in the LM3S6432-IQC50-A2.
LM3S6432-IQC50-A2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 100-LQFP
- Series:
- Stellaris® ARM® Cortex®-M3S 6000
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Verified
- Core Processor:
- ARM® Cortex®-M3
- Core Size:
- 32-Bit Single-Core
- Speed:
- 50MHz
- Connectivity:
- Ethernet, I2C, IrDA, Microwire, SPI, SSI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O:
- 43
- 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 3x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
LM3S6432-IQC50-A2 FAQ
1.How can I place an order for LM3S6432-IQC50-A2 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S6432-IQC50-A2 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 LM3S6432-IQC50-A2 reliable?
The price and inventory of LM3S6432-IQC50-A2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3S6432-IQC50-A2 is usually 5 days.
3.What payment methods are accepted for LM3S6432-IQC50-A2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S6432-IQC50-A2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S6432-IQC50-A2?
LM3S6432-IQC50-A2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S6432-IQC50-A2 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 LM3S6432-IQC50-A2?
For technical support, including LM3S6432-IQC50-A2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S6432-IQC50-A2 requirements.
6.How does Aetrix verify that LM3S6432-IQC50-A2 is sourced from the original manufacturer or authorized distributors?
All LM3S6432-IQC50-A2 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 LM3S6432-IQC50-A2 meets industry standards.
7.What is the process for return or replacement of LM3S6432-IQC50-A2?
All LM3S6432-IQC50-A2 units undergo pre-shipment inspection (PSI). If there is an issue with LM3S6432-IQC50-A2, 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 LM3S6432-IQC50-A2 part is unused and in its original packaging.
Return procedure for LM3S6432-IQC50-A2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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