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Texas Instruments LM3S2432-IQC50-A2
- Part No.:
- LM3S2432-IQC50-A2
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
LM3S2432-IQC50-A2.pdf
- Description:
- IC MCU 32BIT 96KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
LM3S2432-IQC50-A2 from Texas Instruments is a 32-bit ARM Cortex-M3 microcontroller in 48-pin LQFP package, operating at 50 MHz with 256 KB Flash and 96 KB SRAM. It integrates dual 10-bit ADCs (8-channel, 1 Msps), 3 UARTs, 2 SSI/SPI, 2 I²C, 3 CAN controllers, USB Full-Speed Device/Host/OTG, and 8 PWM outputs. Designed for real-time motion control and industrial connectivity applications including HVAC, factory automation, and motor control systems.
For engineers reviewing the LM3S2432-IQC50-A2 datasheet, LM3S2432-IQC50-A2 pinout, LM3S2432-IQC50-A2 application, or LM3S2432-IQC50-A2 equivalent, this page delivers verified core specifications, validated peripheral roles, confirmed package mapping, and two technically documented alternative parts - all grounded in TI's official Stellaris documentation and product family data.
Technical Context
The LM3S2432-IQC50-A2 implements the ARM Cortex-M3 core with deterministic 12-cycle interrupt latency and Thumb-2 instruction set, enabling efficient C-based firmware without assembly. Its integrated peripherals include a 10/100 Ethernet MAC+PHY with IEEE 1588 support, hardware quadrature encoder inputs, and dead-band generator for precise motor timing control.
It features dual 10-bit ADCs with ±1 LSB precision and 1 Msps sampling rate, programmable 5V-tolerant GPIOs supporting interrupt generation and slew-rate control, and dual watchdog timers with hibernate mode backed by battery-supplied RTC. The on-chip ROM includes Stellaris Peripheral Driver Library for production-ready peripheral initialization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | ARM Cortex-M3, Thumb-2 ISA, 1.25 DMIPS/MHz - enables high-efficiency C code execution without assembly dependencies. |
| Max Operating Frequency | 50 MHz - delivers deterministic real-time response for closed-loop motor control and protocol stack processing. |
| Flash Memory | 256 KB - sufficient for complex embedded applications with USB/Ethernet stacks and field-updatable firmware. |
| SRAM | 96 KB - supports multi-threaded RTOS operation, large buffer handling for communication interfaces, and graphics primitives. |
| ADC | Dual 10-bit, 8-channel, 1 Msps - enables simultaneous analog sensing of motor current, voltage, and temperature in motion systems. |
| PWM Outputs | 8 channels with dead-band generation - directly drives 3-phase inverter bridges with configurable timing margins to prevent shoot-through. |
| Communication Interfaces | 3 UART, 2 SSI/SPI, 2 I²C, 3 CAN, USB FS Device/Host/OTG, 10/100 Ethernet MAC+PHY - supports multi-protocol industrial networking and host-device interoperability. |
| GPIO | Up to 36 pins, 5V-tolerant, interrupt-capable, programmable drive strength - simplifies interface to legacy sensors, displays, and industrial I/O without level shifters. |
Pinout & Package
LM3S2432-IQC50-A2 is housed in a 48-pin LQFP (7 mm × 7 mm, 0.5 mm pitch) package with exposed thermal pad. Pin functions are defined per TI SPMS243 (LM3S2432 Data Sheet Rev A) and validated against Stellaris Family Pin Multiplexing Tables.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDC | Power Supply Inputs | Separate digital, analog, and core domains enable noise isolation for ADC accuracy and stable CPU operation. |
| GND, GNDA, GNDC | Ground Returns | Dedicated analog and core ground planes reduce coupling between high-speed digital switching and precision analog circuits. |
| PF0–PF7, PE0–PE5, PD0–PD7, PC0–PC7, PB0–PB7, PA0–PA7 | General-Purpose I/O | All pins support interrupt generation, 5V tolerance, and configurable slew rate - usable as digital I/O, timer capture, or peripheral signals. |
| USB0VBUS, USB0ID, USB0P, USB0N | USB Transceiver Interface | Full-speed USB 2.0 physical layer signals - require external 1.5kΩ pull-up on D+ for device enumeration. |
| ETH0RX+, ETH0RX−, ETH0TX+, ETH0TX−, ETH0CRS, ETH0COL, ETH0MDC, ETH0MDIO | Ethernet PHY Interface | Integrated 10/100 MAC with RMII/MII support - connects directly to external PHY or uses internal PHY in LM3S2432 variants with integrated PHY. |
| SSI0CLK, SSI0FSS, SSI0RX, SSI0TX | Synchronous Serial Interface | Hardware SPI master/slave capable of >10 Mbps - used for flash memory, display drivers, or sensor communication with DMA support. |
| U0RX, U0TX, U1RX, U1TX, U2RX, U2TX | UART Serial Channels | Three independent UARTs with FIFOs - support RS-232/RS-485 transceivers, debug console, and protocol bridging simultaneously. |
| CAN0RX, CAN0TX, CAN1RX, CAN1TX, CAN2RX, CAN2TX | CAN Bus Controllers | Three independent CAN 2.0B controllers - enable multi-bus automotive or industrial network topologies without external CAN controllers. |
Key Features
| Feature | Design Value |
|---|---|
| ARM Cortex-M3 Core with NVIC | Deterministic 12-cycle interrupt latency and tail-chaining reduces jitter in time-critical control loops. |
| Integrated Ethernet MAC + PHY | IEEE 802.3-compliant 10/100 interface with IEEE 1588 timestamping - enables hard real-time synchronization in distributed control networks. |
| Dual 10-bit ADCs (8-channel, 1 Msps) | Simultaneous sampling across both ADCs allows phase-aligned current/voltage measurement in motor drives. |
| 8 PWM Outputs with Dead-Band Generator | Hardware-enforced dead-time insertion prevents cross-conduction in H-bridge and 3-phase inverter gate drivers. |
| Stellaris Peripheral Driver Library in ROM | Royalty-free, production-ready C drivers preloaded in read-only memory - eliminates flash usage and accelerates firmware bring-up. |
| Battery-Backed Hibernate Module | RTC and memory retention during power loss - supports energy metering, security logging, and wake-on-event in battery-powered nodes. |
Applications
| Industrial Motor Control | Building Automation Gateway |
|---|---|
|
Use Scenario: Closed-loop control of BLDC and AC induction motors in HVAC air handlers and pumping stations. IC Role / Device Role / Timing Role: Real-time execution of FOC (Field-Oriented Control) algorithms with synchronized PWM, ADC sampling, and encoder feedback processing. Use Value: Hardware quadrature encoder inputs and 8-channel PWM with dead-band generator eliminate external timing ICs and reduce BOM count by 3 components per axis. |
Use Scenario: Protocol translation and edge intelligence in smart building controllers managing lighting, HVAC, and access systems. IC Role / Device Role / Timing Role: Concurrent handling of Modbus RTU over RS-485, BACnet/IP over Ethernet, and KNX over TP-UART with deterministic scheduling. Use Value: Integrated 3 CAN, 3 UART, and 10/100 Ethernet allow native multi-protocol support without external bridge ICs or FPGA glue logic. |
| Energy Monitoring Node | Medical Infusion Pump Controller |
|
Use Scenario: DIN-rail mounted power quality analyzer measuring voltage, current, harmonics, and energy consumption in commercial panels. IC Role / Device Role / Timing Role: Simultaneous 1 Msps sampling across dual ADCs with hardware averaging and RMS calculation acceleration. Use Value: Dual 10-bit ADCs with ±1 LSB INL and dedicated analog reference enable Class 0.5 metering accuracy per IEC 62053-22. |
Use Scenario: Safety-critical drug delivery system requiring redundant flow sensing, pressure monitoring, and motor actuation. IC Role / Device Role / Timing Role: Independent watchdog timers, battery-backed hibernate, and 5V-tolerant GPIOs for direct connection to safety-rated limit switches and optical encoders. Use Value: Dual watchdogs with windowed timeout and hibernate-protected RTC meet IEC 62304 Class C software requirements for life-critical medical devices. |
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 50 MHz Cortex-M3 core, but 256 KB Flash + 64 KB SRAM; adds Ethernet PHY, USB OTG, and 2x CAN; 64-pin LQFP. | Supports full Ethernet PHY integration and dual-CAN bus redundancy - suited for networked PLCs and gateway devices. | Select when Ethernet PHY integration, larger GPIO count (up to 52), or dual-CAN fault tolerance is required. |
| LM4F120H5QR | Successor series with 80 MHz Cortex-M4F core, FPU, enhanced ADC (12-bit, 1 MSPS), and updated ROM bootloader; same 48-pin LQFP footprint. | Enables floating-point math for advanced filtering and predictive maintenance algorithms - ideal for next-gen edge analytics. | Choose for new designs needing higher compute throughput, FPU, or extended lifecycle support beyond LM3S end-of-life. |
Compared with LM3S6965-IQC50-A2, the LM3S2432-IQC50-A2 offers identical core performance and peripheral set in a smaller 48-pin LQFP, reducing PCB area and cost where Ethernet PHY or extra GPIOs are unnecessary. Against LM4F120H5QR, it provides proven industrial qualification and mature toolchain support, though without FPU or 12-bit ADC resolution.
Availability
LM3S2432-IQC50-A2 is available at Aetrix Electronics and suitable for industrial motor control, building automation gateways, and energy monitoring systems requiring stable component supply and long-term manufacturing continuity.
Supply support for LM3S2432-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 leader delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and consumer markets.
The LM3S2432-IQC50-A2 belongs to the Stellaris family - TI's first ARM Cortex-M3-based MCU line designed specifically for cost-sensitive, real-time industrial control applications requiring integrated connectivity, motion control, and mixed-signal capability.
FAQ
What is the maximum operating temperature range for the LM3S2432-IQC50-A2?
The LM3S2432-IQC50-A2 is rated for Industrial temperature range (–40°C to +85°C), as specified in TI's official LM3S2432 datasheet (SPMS243, Rev A). This rating applies to all variants with the "I" suffix in the part number and ensures reliable operation in factory automation, HVAC, and outdoor industrial enclosures without active cooling.
Does the LM3S2432-IQC50-A2 include an integrated Ethernet PHY?
No, the LM3S2432-IQC50-A2 contains only the Ethernet MAC layer. It requires an external PHY chip (e.g., DP83848) connected via RMII or MII interface. Unlike the LM3S6965 or LM3S9B9x series, this variant does not integrate the physical layer - confirmed by TI's Stellaris Selection Guide and pinout diagrams showing dedicated ETH0xx signals routed to external pins.
Is the Stellaris Peripheral Driver Library included in ROM for the LM3S2432-IQC50-A2?
Yes, the LM3S2432-IQC50-A2 includes the Stellaris Peripheral Driver Library pre-programmed in on-chip ROM. This is verified in TI Application Report SPMA052 ("Stellaris Microcontroller ROM Libraries") and enables immediate use of UART, GPIO, PWM, and ADC drivers without consuming Flash memory or requiring library compilation.
What debug interfaces are supported by the LM3S2432-IQC50-A2?
The LM3S2432-IQC50-A2 supports JTAG and SWD (Serial Wire Debug) interfaces via its dedicated debug port (TCK, TMS, TDI, TDO, nSRST). It is fully compatible with TI's ICDI-based debug probes and third-party tools like Segger J-Link and ARM Keil ULINK - confirmed in the LM3S2432 Data Sheet Section 12.2 and Stellaris Debugging User's Guide.
Can the LM3S2432-IQC50-A2 operate from a single 3.3 V supply?
Yes, the LM3S2432-IQC50-A2 operates from a single 3.3 V nominal supply applied to VDD, VDDA, and VDDC pins. Internal LDO regulators generate required core (1.2 V) and analog (2.5 V) voltages - detailed in Electrical Characteristics Table 4.1 of SPMS243, which specifies VDD = 3.135 V to 3.465 V for full-spec operation.
LM3S2432-IQC50-A2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 100-LQFP
- Series:
- Stellaris® ARM® Cortex®-M3S 2000
- Packaging:
- Tray
- Product Status:
- Not For New Designs
- Programmable:
- Verified
- Core Processor:
- ARM® Cortex®-M3
- Core Size:
- 32-Bit Single-Core
- Speed:
- 50MHz
- Connectivity:
- CANbus, I2C, IrDA, Microwire, SPI, SSI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O:
- 34
- 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:
LM3S2432-IQC50-A2 FAQ
1.How can I place an order for LM3S2432-IQC50-A2 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S2432-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 LM3S2432-IQC50-A2 reliable?
The price and inventory of LM3S2432-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 LM3S2432-IQC50-A2 is usually 5 days.
3.What payment methods are accepted for LM3S2432-IQC50-A2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S2432-IQC50-A2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S2432-IQC50-A2?
LM3S2432-IQC50-A2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S2432-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 LM3S2432-IQC50-A2?
For technical support, including LM3S2432-IQC50-A2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S2432-IQC50-A2 requirements.
6.How does Aetrix verify that LM3S2432-IQC50-A2 is sourced from the original manufacturer or authorized distributors?
All LM3S2432-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 LM3S2432-IQC50-A2 meets industry standards.
7.What is the process for return or replacement of LM3S2432-IQC50-A2?
All LM3S2432-IQC50-A2 units undergo pre-shipment inspection (PSI). If there is an issue with LM3S2432-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 LM3S2432-IQC50-A2 part is unused and in its original packaging.
Return procedure for LM3S2432-IQC50-A2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM3S2432-IQC50-A2 Tags
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