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Texas Instruments LM3S6432-IQC50
- Part No.:
- LM3S6432-IQC50
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
LM3S6432-IQC50.pdf
- Description:
- IC MCU 32BIT 96KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,472
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Product details
Overview
LM3S6432-IQC50 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 (8-channel, 12-bit), 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 datasheet, LM3S6432-IQC50 pinout, LM3S6432-IQC50 application, or LM3S6432-IQC50 equivalent, key selection criteria include Ethernet MAC integration, 50 MHz Cortex-M3 performance, 100-pin LQFP footprint, industrial-grade thermal rating, and peripheral mix for deterministic I/O and communication.
Technical Context
The LM3S6432-IQC50 implements the ARMv7-M architecture with NVIC, SysTick, MPU, and Thumb-2 instruction set. It integrates a full Ethernet MAC (MII interface, no PHY), supporting IEEE 802.3-compliant frame transmission/reception without external MAC logic.
Its analog subsystem includes an 8-channel 12-bit ADC with hardware averaging and two analog comparators with programmable reference. Digital peripherals include two UARTs (one with IrDA/SIR), two SSI modules, one I²C master/slave, six PWM generator blocks, and 43 GPIOs with interrupt capability per pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 50 MHz max - delivers deterministic real-time execution with <12-cycle interrupt latency. |
| Flash Memory | 256 KB - sufficient for complex protocol stacks (e.g., TCP/IP, Modbus TCP) plus application firmware. |
| SRAM | 32 KB - supports Ethernet packet buffering, stack space for RTOS tasks, and ADC data acquisition buffers. |
| ADC | 8-channel, 12-bit, up to 1 MSPS - enables high-resolution sensor monitoring (e.g., current, voltage, temperature) in motor drives. |
| Ethernet Interface | MAC-only (MII) - requires external PHY (e.g., DP83848) but eliminates need for external MAC IC or FPGA logic. |
| Operating Temp | –40°C to +85°C - qualified for industrial automation environments including factory floor PLCs and remote I/O nodes. |
| Package | 100-pin LQFP (14 × 14 mm, 0.5 mm pitch) - compatible with standard surface-mount assembly and provides full peripheral pin access. |
Pinout & Package
LM3S6432-IQC50 is housed in a 100-pin LQFP package (JEDEC MO-220, variant VGG). Pinout supports full MII interface (16 signals), dual UARTs (TX/RX/RTS/CTS), two SSI ports, I²C, 8 ADC inputs, 2 comparator inputs, 6 PWM outputs, and 43 general-purpose I/Os with slew-rate control and weak pull-ups/downs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDC | Power supply rails | VDD (digital core), VDDA (analog), VDDC (clock system) - require separate filtering; decoupling critical for ADC accuracy and clock stability. |
| PD0–PD7, PE0–PE7, PF0–PF4, PG0–PG7, PH0–PH7, PK0–PK3 | GPIO banks | 43 total GPIOs - configurable as digital I/O, timer/PWM capture, UART/SSI/I²C functions, or ADC inputs (some shared). |
| RMII/MII pins (TXD0–TXD3, RXD0–RXD3, TXEN, RXDV, CRS, COL, REFCLK) | Ethernet MAC interface | Full MII support - enables 10/100 Mbps operation; REFCLK must be 25 MHz (100 Mbps) or 2.5 MHz (10 Mbps) from external source or PLL-derived. |
| U0RX/U0TX/U1RX/U1TX | UART transceivers | Dual independent UARTs - U0 supports IrDA modulation; both support FIFO, RTS/CTS flow control, and auto-baud detection. |
| SSI0CLK/SSI0FSS/SSI0RX/SSI0TX, SSI1CLK/SSI1FSS/SSI1RX/SSI1TX | Synchronous serial interfaces | Two independent SPI-compatible ports - support master/slave, multi-drop, and TI-specific frame formats for DAC/ADC interfacing. |
| SSI0FSS, SSI1FSS | Frame sync select | Programmable active-low chip-select outputs - eliminate need for external logic to manage multiple SPI slaves. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Ethernet MAC | Reduces BOM count by eliminating external MAC IC; supports MII for direct connection to PHYs like DP83848 or LAN8720. |
| ARM Cortex-M3 with NVIC | Enables low-latency (<12 cycle), prioritized interrupt handling essential for time-critical control loops and real-time networking. |
| Hardware ADC averaging | Configurable 2x–64x oversampling reduces noise without CPU overhead - improves resolution for precision analog sensing. |
| Dual SSI modules | Allows concurrent SPI-based peripheral control (e.g., one for display driver, one for sensor array) without software arbitration. |
| Programmable internal voltage reference | Provides stable 1.65 V or 2.5 V reference for analog comparators - eliminates need for external reference IC in threshold-detection circuits. |
Applications
| Industrial Ethernet I/O Module | Programmable Logic Controller (PLC) Base Unit |
|---|---|
Use Scenario: Remote distributed I/O node collecting analog sensor data and digital status from field devices, transmitting over 100BASE-TX Ethernet to SCADA host. IC Role / Device Role / Timing Role: Central controller executing cyclic I/O scan, TCP/IP stack, and Modbus TCP gateway logic; Ethernet MAC handles frame assembly/disassembly. Use Value: Single-chip solution replaces MCU + external MAC + PHY interface logic, reducing PCB area and power by ~350 mW versus discrete implementation. | Use Scenario: Compact standalone PLC with 16 digital inputs, 8 digital outputs, 4 analog inputs, and Ethernet-based HMI and programming interface. IC Role / Device Role / Timing Role: Real-time deterministic controller running ladder logic interpreter; ADC samples analog inputs every 10 ms; PWM drives proportional valves. Use Value: On-chip 256 KB flash stores ladder logic program and firmware updates; 32 KB SRAM accommodates runtime variables and Ethernet packet buffers. |
| Motor Control Gateway | Building Automation Controller |
Use Scenario: Field-level gateway aggregating CANopen motor drives and reporting status via Ethernet to building management system. IC Role / Device Role / Timing Role: Protocol translator between CAN and TCP/IP; uses UART for CAN controller interface and Ethernet MAC for upstream comms. Use Value: Dual UARTs enable simultaneous CAN bus monitoring and debug console; hardware CRC accelerators offload TCP checksum calculation. | Use Scenario: HVAC controller managing chillers, AHUs, and VAV boxes using BACnet/IP over Ethernet, with local sensor fusion (temp, humidity, CO₂). IC Role / Device Role / Timing Role: BACnet/IP stack host and sensor data aggregator; ADC reads thermistors and analog pressure transducers. Use Value: Integrated 12-bit ADC with hardware averaging achieves ±0.5°C temperature measurement accuracy without external signal conditioning. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3S6965-IQC50 | Same core, 256 KB flash, 64 KB SRAM, adds USB 2.0 device controller and additional GPIOs; no Ethernet MAC. | Better suited for USB-connected human interface devices; lacks native Ethernet, requiring external PHY+MAC or bridge IC. | Select when USB device functionality is primary and Ethernet is optional or implemented via external bridge. |
| TM4C123GH6PM | Successor family: Cortex-M4F core, 80 MHz, 256 KB flash, 32 KB SRAM, integrated PHY option (via external crystal), enhanced PWM and motion control peripherals. | Supports floating-point math for advanced motor control algorithms; Ethernet PHY integration simplifies layout but increases cost vs. MAC-only approach. | Select for new designs needing higher performance, FPU, or simplified Ethernet PHY interface - not drop-in compatible due to pinout and register map changes. |
Compared with LM3S6432-IQC50, LM3S6965-IQC50 trades Ethernet MAC for USB and more RAM, while TM4C123GH6PM offers higher clock speed, FPU, and optional PHY integration but requires board redesign and firmware porting.
Availability
LM3S6432-IQC50 is available at Aetrix Electronics and suitable for industrial automation, networked sensor nodes, and embedded Ethernet gateways requiring stable component supply, long-lifecycle support, and consistent electrical specifications across production batches.
Supply support for LM3S6432-IQC50 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, specializing in analog, embedded processing, and wireless technologies with over 90 years of innovation in industrial and automotive electronics.
The Stellaris LM3S series was designed specifically for cost-sensitive, real-time industrial control applications requiring integrated communication peripherals - especially Ethernet MAC, multiple serial interfaces, and robust analog front-ends - before the TM4C migration.
FAQ
Does the LM3S6432-IQC50 include an integrated Ethernet PHY?
No, the LM3S6432-IQC50 contains only an Ethernet MAC compliant with IEEE 802.3 MII. An external PHY (e.g., DP83848C or LAN8720A) is required for physical layer signaling. The LM3S6432-IQC50 provides all MAC registers, DMA, and frame buffering - the PHY connects directly to its MII pins and supplies REFCLK.
What is the maximum operating frequency of the LM3S6432-IQC50?
The LM3S6432-IQC50 operates at a maximum system clock frequency of 50 MHz, derived from its internal PLL fed by an external crystal (4–25 MHz) or internal oscillator. This frequency is specified across the full industrial temperature range (–40°C to +85°C) and supports deterministic real-time execution of control and communication tasks.
How many analog input channels does the LM3S6432-IQC50 support?
The LM3S6432-IQC50 features an 8-channel, 12-bit successive-approximation ADC with sample rates up to 1 MSPS. Channels are multiplexed across dedicated analog pins (AIN0–AIN7) and share some GPIOs (e.g., PE0–PE3), allowing flexible routing while maintaining simultaneous sampling capability per sequence.
Is the LM3S6432-IQC50 pin-compatible with other Stellaris LM3S devices?
No, the LM3S6432-IQC50 is not pin-compatible with other LM3S variants such as LM3S6965 or LM3S8962. Its 100-pin LQFP package has a unique pinout optimized for Ethernet MII and specific peripheral allocation. Migration to other LM3S parts requires PCB redesign and firmware adaptation due to differences in GPIO mapping, peripheral enable registers, and interrupt vector tables.
What development tools are supported for the LM3S6432-IQC50?
The LM3S6432-IQC50 is supported by Texas Instruments' Code Composer Studio (CCS) IDE, Keil MDK-ARM, and IAR Embedded Workbench. TI's StellarisWare Peripheral Driver Library provides production-ready drivers for all on-chip peripherals, and evaluation boards like the EK-LM3S6965 (with adapter) enable functional validation despite not matching the exact pinout of the LM3S6432-IQC50.
LM3S6432-IQC50 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 100-LQFP
- Series:
- Stellaris® ARM® Cortex®-M3S 6000
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not 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 FAQ
1.How can I place an order for LM3S6432-IQC50 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S6432-IQC50 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 reliable?
The price and inventory of LM3S6432-IQC50 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 is usually 5 days.
3.What payment methods are accepted for LM3S6432-IQC50?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S6432-IQC50 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S6432-IQC50?
LM3S6432-IQC50 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S6432-IQC50 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?
For technical support, including LM3S6432-IQC50 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S6432-IQC50 requirements.
6.How does Aetrix verify that LM3S6432-IQC50 is sourced from the original manufacturer or authorized distributors?
All LM3S6432-IQC50 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 meets industry standards.
7.What is the process for return or replacement of LM3S6432-IQC50?
All LM3S6432-IQC50 units undergo pre-shipment inspection (PSI). If there is an issue with LM3S6432-IQC50, 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 part is unused and in its original packaging.
Return procedure for LM3S6432-IQC50:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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