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Texas Instruments LM3S6537-IQC50-A2
- Part No.:
- LM3S6537-IQC50-A2
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
LM3S6537-IQC50-A2.pdf
- Description:
- IC MCU 32BIT 96KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LM3S6537-IQC50-A2 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), and hibernation module. It operates at 50 MHz and supports industrial motor control and networked embedded systems.
For engineers reviewing the LM3S6537-IQC50-A2 datasheet, LM3S6537-IQC50-A2 pinout, LM3S6537-IQC50-A2 application, or LM3S6537-IQC50-A2 equivalent, key selection factors include its integrated Ethernet PHY interface support, hibernation power management, 50 MHz CPU clock, 10-bit ADC sampling rate, and QFP-100 package compatibility with legacy Stellaris designs.
Technical Context
The LM3S6537-IQC50-A2 implements the ARM Cortex-M3 core with NVIC, SysTick, MPU, and debug interfaces (JTAG/SWD). It integrates a full Ethernet MAC controller compliant with IEEE 802.3, supporting MII and RMII physical layer interfaces.
Its analog subsystem includes an 8-channel, 10-bit ADC with hardware averaging and internal temperature sensor; digital peripherals include two UARTs (one with IrDA/SIR), two SSI modules, one I²C master/slave, six GPTM timers (including RTC mode), and a watchdog timer with windowed operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 32-bit RISC, 50 MHz max operation - enables deterministic real-time control with Thumb-2 instruction set and low-latency interrupt handling. |
| Memory | 256 KB on-chip flash + 64 KB SRAM - sufficient for standalone Ethernet-enabled firmware with protocol stacks and application logic. |
| ADC | 10-bit, 8-channel SAR ADC with 1 MSPS sample rate and hardware averaging - supports precision analog monitoring in motor feedback or sensor fusion systems. |
| Ethernet | IEEE 802.3-compliant MAC with MII/RMII support - enables direct connection to external PHY without external glue logic. |
| Hibernation | Dedicated hibernation module with battery-backed RTC and 2 KB RAM - maintains timekeeping and critical state during ultra-low-power sleep (< 1.5 µA typical). |
| Package | 100-pin LQFP (14 × 14 mm, 0.5 mm pitch) - compatible with standard surface-mount assembly and legacy Stellaris PCB footprints. |
| Operating Temp | –40°C to +85°C - qualified for industrial environments including factory automation and building control systems. |
Pinout & Package
LM3S6537-IQC50-A2 is housed in a 100-pin LQFP (Low-Profile Quad Flat Package) with 0.5 mm lead pitch and exposed thermal pad. Pin functions are defined per TI SPMS131I datasheet Rev I (July 2014), with dedicated JTAG/SWD debug pins, Ethernet MII signals (TXD[3:0], RXD[3:0], TXEN, RXDV, CRS, COL), and multiplexed GPIOs supporting peripheral remapping.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDC | Power supply inputs | Separate digital (VDD), analog (VDDA), and core (VDDC) rails enable noise isolation for ADC and PLL stability. |
| PD0–PD7, PE0–PE5, PF0–PF4, etc. | GPIO / Peripheral multiplexing | Over 60 GPIOs with configurable pull-up/down, slew rate, and drive strength; many support edge-triggered interrupts. |
| PA0–PA7, PB0–PB7 | Ethernet MII interface | Dedicated pins for 8-bit MII data bus, control signals (TXEN, RXDV), and timing (REFCLK, CRS, COL) - no external logic required. |
| TCK, TMS, TDI, TDO, nSRST | JTAG debug interface | Full 5-pin JTAG for boundary scan, flash programming, and real-time debugging via SWD-compatible tools. |
| HIB, RTCCLK, HIBRST | Hibernation module control | Direct access to hibernate entry/exit, RTC clock source selection, and battery-backed reset - enables sub-µA system sleep modes. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Ethernet MAC | IEEE 802.3-compliant media access controller with MII/RMII support - eliminates need for external MAC or bridge IC in wired IoT nodes. |
| Hibernation Module | Ultra-low-power mode with battery-backed RTC and 2 KB SRAM retention - extends battery life in remote sensors and metering applications. |
| Peripheral Multiplexing | GPIO pins shared across UART, SSI, I²C, PWM, and analog functions - reduces BOM count and simplifies layout with flexible signal routing. |
| Hardware ADC Averaging | Configurable 2x–64x oversampling and averaging - improves effective resolution to ~11.5 bits without software post-processing overhead. |
| ARM Cortex-M3 Core | Thumb-2 instruction set, NVIC with 8-level priority, MPU, and integrated debug - delivers deterministic real-time response for motor control and safety-critical tasks. |
Applications
| Industrial Motor Control | Building Automation Gateway |
|---|---|
Use Scenario: Closed-loop control of BLDC motors using encoder feedback and PWM-driven gate drivers. IC Role / Device Role / Timing Role: Real-time execution of FOC algorithms, ADC sampling of current/voltage, and generation of synchronized 3-phase PWM outputs. Use Value: 50 MHz Cortex-M3 core with six GPTMs and hardware ADC averaging ensures < 1 µs jitter in PWM timing and accurate current sensing at 10 kHz loop rates. | Use Scenario: Protocol translation between BACnet MS/TP field devices and IP-based building management systems. IC Role / Device Role / Timing Role: Ethernet endpoint running lightweight TCP/IP stack while managing RS-485 serial interfaces to HVAC controllers and sensors. Use Value: Integrated MAC + dual UARTs + I²C allow concurrent Ethernet communication and legacy fieldbus bridging without external co-processors or FPGA logic. |
| Remote Energy Metering | Networked Industrial Sensor Node |
Use Scenario: Smart electricity meter with tamper detection, pulse counting, and secure data upload over Ethernet. IC Role / Device Role / Timing Role: Data acquisition engine capturing voltage/current waveforms, computing RMS/kWh, and maintaining secure time-stamped logs. Use Value: Hibernation module retains RTC and critical registers during power loss; 256 KB flash stores firmware updates and encrypted metering history. | Use Scenario: DIN-rail mounted sensor aggregator collecting temperature, vibration, and humidity data from multiple analog/digital sources. IC Role / Device Role / Timing Role: Central hub performing local preprocessing, time-synchronized sampling, and buffered Ethernet transmission. Use Value: 8-channel ADC with hardware averaging and 64 KB SRAM enable high-fidelity waveform capture and burst-mode logging without host intervention. |
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 Cortex-M3 core, 256 KB flash, but adds USB 2.0 OTG controller and removes Ethernet MAC. | Better suited for USB-connected human interface devices; lacks native Ethernet for wired infrastructure monitoring. | Select LM3S6965-IQC50-A2 only when USB device/host capability is required and Ethernet is unnecessary. |
| TM4C123GH6PM | Successor part with same pinout, 32 KB SRAM increased to 32 KB (vs 64 KB), added CAN, enhanced ADC (12-bit), and updated ROM bootloader. | Supports automotive diagnostics (CAN) and higher-resolution analog measurement; requires firmware migration due to peripheral register changes. | Choose TM4C123GH6PM for new designs needing CAN or improved ADC, but verify SRAM sufficiency for existing Ethernet stack usage. |
Compared with LM3S6537-IQC50-A2, LM3S6965-IQC50-A2 trades Ethernet for USB, making it unsuitable for wired infrastructure nodes; TM4C123GH6PM offers modernized peripherals and lifecycle support but requires validation of SRAM headroom and register-level driver updates.
Availability
LM3S6537-IQC50-A2 is available at Aetrix Electronics and suitable for industrial motor control, building automation gateways, remote energy metering, and networked sensor nodes requiring stable component supply and long-term obsolescence planning.
Supply support for LM3S6537-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 specializing in analog, embedded processing, and connectivity technologies, with decades of experience in industrial and automotive microcontrollers.
The Stellaris LM3S family was designed specifically for cost-sensitive, performance-demanding industrial applications requiring integrated connectivity (Ethernet, USB), real-time control, and low-power operation - targeting factory automation, building systems, and smart grid endpoints.
FAQ
What is the maximum operating frequency of the LM3S6537-IQC50-A2?
The LM3S6537-IQC50-A2 operates at a maximum CPU frequency of 50 MHz, as specified in the Texas Instruments SPMS131I datasheet. This speed is achieved using the internal PLL with a crystal or external clock input. The 50 MHz rating applies across the full industrial temperature range (–40°C to +85°C) and is validated under worst-case voltage and process corners. LM3S6537-IQC50-A2 does not support overclocking beyond this specification.
Does the LM3S6537-IQC50-A2 include an integrated Ethernet PHY?
No, the LM3S6537-IQC50-A2 integrates only the Ethernet MAC layer (IEEE 802.3 compliant) and requires an external PHY chip for physical layer signaling. It supports both MII and RMII interfaces, allowing flexible PHY selection such as the DP83848 or LAN8720. The LM3S6537-IQC50-A2 provides all necessary MAC control, buffer management, and DMA interfaces - no additional protocol offload IC is needed.
What power modes does the LM3S6537-IQC50-A2 support?
The LM3S6537-IQC50-A2 supports Sleep, Deep-Sleep, and Hibernation modes. Hibernation mode draws less than 1.5 µA while retaining RTC time and 2 KB of SRAM. Wake-up sources include external pins, RTC match events, and hibernate wake pins. These modes are managed by the dedicated hibernation module, and LM3S6537-IQC50-A2's power control registers allow precise gating of individual peripheral clocks to minimize active-mode current.
Is the LM3S6537-IQC50-A2 pin-compatible with other Stellaris LM3S devices?
The LM3S6537-IQC50-A2 uses a 100-pin LQFP package with a specific pinout defined in the SPMS131I datasheet. While some LM3S devices share the same package size, pin assignments differ significantly - especially for Ethernet, USB, and analog signals. LM3S6537-IQC50-A2 is not pin-compatible with LM3S6965-IQC50-A2 or LM3S8962-IQC50-A2 due to differing peripheral allocations and power pin placements.
What debug interfaces are supported by the LM3S6537-IQC50-A2?
The LM3S6537-IQC50-A2 supports standard 5-pin JTAG (TCK, TMS, TDI, TDO, nSRST) and Serial Wire Debug (SWD) via shared pins. Debug access enables flash programming, real-time variable inspection, breakpoint setting, and trace via the TPIU. TI's Code Composer Studio and third-party tools like Segger J-Link fully support LM3S6537-IQC50-A2 debugging without requiring external adapters or firmware loaders.
LM3S6537-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:
- 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:
- 41
- Program Memory Size:
- 96KB (96K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 64K x 8
- Voltage - Supply (Vcc/Vdd):
- 2.25V ~ 2.75V
- Data Converters:
- A/D 4x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
LM3S6537-IQC50-A2 FAQ
1.How can I place an order for LM3S6537-IQC50-A2 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S6537-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 LM3S6537-IQC50-A2 reliable?
The price and inventory of LM3S6537-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 LM3S6537-IQC50-A2 is usually 5 days.
3.What payment methods are accepted for LM3S6537-IQC50-A2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S6537-IQC50-A2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S6537-IQC50-A2?
LM3S6537-IQC50-A2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S6537-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 LM3S6537-IQC50-A2?
For technical support, including LM3S6537-IQC50-A2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S6537-IQC50-A2 requirements.
6.How does Aetrix verify that LM3S6537-IQC50-A2 is sourced from the original manufacturer or authorized distributors?
All LM3S6537-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 LM3S6537-IQC50-A2 meets industry standards.
7.What is the process for return or replacement of LM3S6537-IQC50-A2?
All LM3S6537-IQC50-A2 units undergo pre-shipment inspection (PSI). If there is an issue with LM3S6537-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 LM3S6537-IQC50-A2 part is unused and in its original packaging.
Return procedure for LM3S6537-IQC50-A2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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