My Inquiry
My Account
Texas Instruments LM3S6432-IQC50-A2T
- Part No.:
- LM3S6432-IQC50-A2T
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
LM3S6432-IQC50-A2T.pdf
- Description:
- IC MCU 32BIT 96KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,181
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM3S6432-IQC50-A2T from Texas Instruments is a 32-bit ARM Cortex-M3 microcontroller with 256 KB flash, 64 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-A2T datasheet, LM3S6432-IQC50-A2T pinout, LM3S6432-IQC50-A2T application, or LM3S6432-IQC50-A2T equivalent, key selection criteria include Ethernet MAC integration, 50 MHz Cortex-M3 performance, 100-pin LQFP footprint, industrial temperature rating, and peripheral set including dual UARTs and hardware PWM.
Technical Context
The LM3S6432-IQC50-A2T implements the ARM Cortex-M3 core with NVIC, SysTick, and MPU, enabling deterministic real-time interrupt handling and memory protection. It integrates a full IEEE 802.3-compliant Ethernet MAC with MII interface, supporting 10/100 Mbps operation without external PHY control logic.
Peripherals include two independent UARTs with IrDA/SIR support, an 8-channel 10-bit ADC with sample sequencers and hardware averaging, and a six-output PWM module with dead-band generation. Clocking is managed via internal PLL, precision oscillator, and multiple gated clock domains for power optimization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 32-bit RISC, runs at up to 50 MHz - enables deterministic real-time execution with Thumb-2 instruction set and low-latency interrupt response. |
| Memory | 256 KB on-chip flash + 64 KB SRAM - sufficient for standalone Ethernet-enabled firmware with protocol stacks and application logic. |
| Operating Temp | –40°C to +85°C - qualified for industrial automation, motor control, and building management systems. |
| Package | 100-pin LQFP (14 × 14 mm, 0.5 mm pitch) - standard surface-mount footprint compatible with automated PCB assembly. |
| Ethernet Interface | Integrated IEEE 802.3 MAC with MII - eliminates need for external MAC IC; requires external PHY for physical layer connection. |
| Analog Input | 8-channel, 10-bit SAR ADC with 1 MSPS max sample rate and hardware averaging - supports sensor monitoring and closed-loop feedback in motor drives. |
| PWM Outputs | 6-channel PWM with configurable dead-band, fault shutdown, and synchronous update - suitable for three-phase inverter control and digital power supplies. |
Pinout & Package
LM3S6432-IQC50-A2T is housed in a 100-pin LQFP (Pb-free, RoHS-compliant) with exposed thermal pad. Pin functions are multiplexed across GPIO banks A–G and dedicated peripheral pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDC | Power supply inputs | Digital core (VDD), analog (VDDA), and USB/Ethernet domain (VDDC) require separate 3.3 V regulation and local decoupling. |
| PA0–PA7, PB0–PB7, etc. | GPIO bank pins | Configurable as digital I/O, alternate function (UART0/1, SSI0/1, I²C0, PWM0/1), or analog input - supports flexible board layout and signal routing. |
| RMII_TXD0, RMII_TXD1 | Ethernet MAC transmit data | Direct MII/RMII output signals - connect to external PHY without level-shifting; timing-critical for 50 MHz operation. |
| USB0_VBUS, USB0_ID | USB OTG interface | Supports USB device/host/OTG modes; VBUS sensing and ID pin enable dynamic role switching in embedded applications. |
| ADC0_IN0–ADC0_IN7 | Analog input channels | Single-ended inputs referenced to VDDA/GND; support internal temperature sensor and external voltage/current sensing. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Ethernet MAC | Reduces BOM count and PCB area by eliminating discrete MAC IC; supports MII/RMII for flexible PHY selection. |
| Dual UART with IrDA/SIR | Enables simultaneous serial diagnostics (UART0) and fieldbus communication (UART1), including infrared remote control interfaces. |
| Hardware PWM with Dead-Band | Allows safe driving of high-side/low-side MOSFET pairs in motor inverters without software timing risk or external gate drivers. |
| 8-Channel 10-bit ADC with Averaging | Improves measurement SNR for noisy industrial environments; sequencer supports automatic channel scanning without CPU intervention. |
| ARM Cortex-M3 with MPU | Provides memory protection for RTOS-based applications, preventing task corruption and improving system reliability in safety-critical control loops. |
Applications
| Industrial Ethernet PLC | Smart Energy Gateway |
|---|---|
Use Scenario: Compact programmable logic controller with Ethernet backbone for factory floor I/O monitoring and Modbus TCP communication. IC Role / Device Role / Timing Role: Central controller executing ladder logic, managing Ethernet packet processing, and coordinating real-time I/O scan cycles. Use Value: Integrated MAC reduces latency vs. SPI-connected Ethernet chips; 50 MHz Cortex-M3 ensures sub-millisecond scan times with 64 KB SRAM buffering. | Use Scenario: Residential energy meter gateway aggregating Zigbee/Z-Wave smart meters and reporting via Ethernet to utility cloud platforms. IC Role / Device Role / Timing Role: Protocol bridge and security-aware edge node handling TLS handshake, AES encryption, and time-synchronized data logging. Use Value: On-chip flash stores firmware and crypto keys; dual UARTs support legacy meter interfaces while Ethernet handles upstream reporting. |
| Motor Control Drive | Building Automation Controller |
Use Scenario: Brushless DC motor drive with Hall-effect commutation, current sensing, and Ethernet-based configuration and telemetry. IC Role / Device Role / Timing Role: Real-time motion controller generating synchronized PWM waveforms, sampling ADCs at 10 kHz, and servicing Ethernet interrupts within 1 µs jitter. Use Value: Hardware PWM dead-band prevents shoot-through; integrated ADC sequencer captures phase currents without CPU load. | Use Scenario: HVAC controller managing damper actuators, temperature/humidity sensors, and BACnet/IP over Ethernet. IC Role / Device Role / Timing Role: System-on-chip managing analog sensor conditioning, PID loop execution, and BACnet stack with deterministic Ethernet frame scheduling. Use Value: 256 KB flash accommodates BACnet stack + application; industrial temp rating ensures reliability inside air handling units. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3S6965-IQC50-A2T | Same core and package but includes USB 2.0 OTG controller and enhanced SSI; no Ethernet MAC. | Better suited for USB-hosted HMI or portable devices; lacks native Ethernet for wired infrastructure. | Select when USB connectivity outweighs Ethernet needs and PHY components can be omitted. |
| TM4C123GH6PM | Successor part with same Cortex-M4F core, 256 KB flash, 32 KB SRAM, and integrated Ethernet MAC+PHY support (via external PHY); higher clock (80 MHz). | Offers floating-point unit and enhanced peripherals; requires updated firmware due to register map differences. | Choose for new designs needing higher performance, FPU for sensor fusion, or TI's long-term availability roadmap. |
Compared with LM3S6432-IQC50-A2T, LM3S6965-IQC50-A2T trades Ethernet for USB OTG and enhanced serial interfaces, while TM4C123GH6PM delivers higher compute throughput and modern peripheral consistency at the cost of firmware migration effort.
Availability
LM3S6432-IQC50-A2T is available at Aetrix Electronics and suitable for industrial Ethernet PLCs, smart energy gateways, motor control drives, and building automation controllers requiring stable component supply and long-lifecycle support.
Supply support for LM3S6432-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 delivering analog, embedded processing, and connectivity solutions with emphasis on reliability, longevity, and industrial-grade qualification.
The Stellaris LM3S series was designed as the first ARM Cortex-M3-based MCU family for cost-sensitive, real-time industrial and automation applications-prioritizing integrated peripherals, deterministic execution, and broad ecosystem support.
FAQ
Does LM3S6432-IQC50-A2T include an integrated Ethernet PHY?
No, LM3S6432-IQC50-A2T integrates only the Ethernet MAC layer compliant with IEEE 802.3. An external PHY chip (e.g., DP83848) must be used for physical layer signaling, connected via MII or RMII interface. The LM3S6432-IQC50-A2T provides all MAC registers, DMA, and packet buffer management required for full TCP/IP stack implementation.
What is the maximum operating frequency of LM3S6432-IQC50-A2T?
The LM3S6432-IQC50-A2T operates at a maximum system clock frequency of 50 MHz, achieved using its internal PLL with crystal or external clock input. This frequency applies to the Cortex-M3 core, bus matrix, and all synchronous peripherals including Ethernet MAC, UARTs, and PWM modules.
Is LM3S6432-IQC50-A2T supported by modern TI development tools?
LM3S6432-IQC50-A2T is supported in TI's legacy StellarisWare Peripheral Driver Library and Keil MDK-ARM v4.x. While newer Code Composer Studio versions provide basic debug support, TI recommends migrating to TM4C123x devices for full toolchain compatibility, ongoing updates, and extended lifecycle assurance.
Can LM3S6432-IQC50-A2T operate without an external crystal?
Yes, LM3S6432-IQC50-A2T can run from its internal 6 MHz RC oscillator for basic operation, but Ethernet, USB, and precise UART baud rates require an external 8 MHz crystal (or 1–25 MHz range) for PLL-based clock generation. The internal oscillator alone does not meet Ethernet timing accuracy requirements.
What debug interfaces are available on LM3S6432-IQC50-A2T?
LM3S6432-IQC50-A2T supports JTAG and SWD (Serial Wire Debug) interfaces via dedicated pins (TCK, TMS, TDI, TDO, nSRST). These enable full-featured debugging including breakpoints, watchpoints, memory inspection, and real-time trace using TI's ICDI-based debug probes or third-party J-Link adapters.
LM3S6432-IQC50-A2T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 100-LQFP
- Series:
- Stellaris® ARM® Cortex®-M3S 6000
- Packaging:
- Tape & Reel (TR)
- 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-A2T FAQ
1.How can I place an order for LM3S6432-IQC50-A2T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S6432-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 LM3S6432-IQC50-A2T reliable?
The price and inventory of LM3S6432-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 LM3S6432-IQC50-A2T is usually 5 days.
3.What payment methods are accepted for LM3S6432-IQC50-A2T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S6432-IQC50-A2T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S6432-IQC50-A2T?
LM3S6432-IQC50-A2T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S6432-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 LM3S6432-IQC50-A2T?
For technical support, including LM3S6432-IQC50-A2T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S6432-IQC50-A2T requirements.
6.How does Aetrix verify that LM3S6432-IQC50-A2T is sourced from the original manufacturer or authorized distributors?
All LM3S6432-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 LM3S6432-IQC50-A2T meets industry standards.
7.What is the process for return or replacement of LM3S6432-IQC50-A2T?
All LM3S6432-IQC50-A2T units undergo pre-shipment inspection (PSI). If there is an issue with LM3S6432-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 LM3S6432-IQC50-A2T part is unused and in its original packaging.
Return procedure for LM3S6432-IQC50-A2T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM3S6432-IQC50-A2T Tags
-
ATTINY4-TSHR
Microchip Technology
-
ATTINY10-TSHR
Microchip Technology
-
ATTINY10-TS8R
Microchip Technology
-
ATTINY202-SSNR
Microchip Technology
-
ATTINY202-SSFR
Microchip Technology
-
ATTINY402-SSNR
Microchip Technology
-
PIC16F15213T-I/MF
Microchip Technology
-
PIC16F15213-E/MF
Microchip Technology
-
PIC10F200T-I/OT
Microchip Technology
-
ATTINY412-SSNR
Microchip Technology
-
PIC10F202T-I/OT
Microchip Technology
-
ATTINY404-SSNR
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
