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Texas Instruments LM3S2533-IQC50-A2
- Part No.:
- LM3S2533-IQC50-A2
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
LM3S2533-IQC50-A2.pdf
- Description:
- IC MCU 32BIT 96KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,546
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Product details
Overview
LM3S2533-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 10/100 Ethernet MAC+PHY with IEEE 1588 support - deployed in industrial motion control and networked building automation systems.
For engineers reviewing the LM3S2533-IQC50-A2 datasheet, LM3S2533-IQC50-A2 pinout, LM3S2533-IQC50-A2 application, or LM3S2533-IQC50-A2 equivalent, key selection criteria include deterministic 12-cycle interrupt latency, 5V-tolerant GPIOs with programmable drive strength, hardware quadrature encoder inputs, dead-band PWM generation, and ROM-resident Stellaris Peripheral Driver Library for production-ready firmware development.
Technical Context
The LM3S2533-IQC50-A2 implements the ARM Cortex-M3 core with Thumb-2 instruction set, delivering 1.25 DMIPS/MHz performance and deterministic interrupt response (12 cycles standard, 6 with tail-chaining). Its system architecture includes a 32-channel DMA controller, NVIC with 8 priority levels, and dual watchdog timers supporting fail-safe operation.
On-chip analog subsystem comprises two independent 10-bit ADCs (each with 8 channels, ±1 LSB precision, up to 1 Msps aggregate sampling), three analog comparators, and an internal temperature sensor. Digital peripherals include hardware-accelerated motion control blocks: quadrature encoder interface (QEI), 8 PWM outputs with dead-band generator, and 4 general-purpose 32-bit timers supporting capture/compare/PWM modes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3 @ 50 MHz - enables real-time deterministic control with 1.25 DMIPS/MHz and single-cycle multiply/hardware divide. |
| Memory | 256 KB Flash + 96 KB SRAM - supports complex control algorithms and protocol stacks without external memory. |
| ADC | Dual 10-bit, 8-channel, 1 Msps total - allows simultaneous sampling of multiple sensors in motor control or energy monitoring. |
| Communication | 3×UART, 2×SSI/SPI, 2×I²C, 3×CAN, USB FS Device/Host/OTG, 10/100 Ethernet MAC+PHY - enables multi-protocol connectivity in industrial gateways. |
| Timers & PWM | 4×32-bit general-purpose timers, 8×PWM outputs with dead-band generator - provides precise timing for BLDC commutation and servo positioning. |
| Analog Peripherals | 3×analog comparators, internal temp sensor - enables over-temperature shutdown and fast analog event detection without CPU intervention. |
| GPIO | Up to 40 5V-tolerant pins with programmable slew rate and drive strength - simplifies interface to legacy 5V logic and reduces external level-shifting components. |
Pinout & Package
LM3S2533-IQC50-A2 is housed in a 48-pin LQFP (7 mm × 7 mm, 0.5 mm pitch) package with exposed thermal pad. Pin assignments follow TI's standardized Stellaris LQFP pinout for 48-pin variants, supporting full peripheral mapping including Ethernet PHY interface, USB D+/D−, CANH/CANL, and dedicated QEI inputs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDUSB | Power supply rails | Separate digital, analog, and USB power domains enable noise isolation and stable ADC/USB operation. |
| GND, GNDA, GNDUSB | Ground references | Dedicated analog and USB ground planes minimize coupling between sensitive analog and high-speed digital signals. |
| PA0–PA7, PB0–PB7, PC0–PC7, PD0–PD7, PE0–PE4 | General-purpose I/O | All 40 GPIOs are 5V-tolerant, support interrupt generation, and can be configured as peripheral functions (e.g., UART0RX/TX, SSI0CLK/SSIC0FSS). |
| USB0EPEN, USB0PFLT, USB0VBUS | USB PHY control | Enable detection of VBUS presence and manage USB transceiver power state during device enumeration and suspend/resume. |
| ETH0RXD0–ETH0RXD3, ETH0TXD0–ETH0TXD3, ETH0CRS, ETH0COL | Ethernet MAC interface | Direct connection to external PHY chip; supports MII mode with IEEE 1588 timestamping on receive/transmit paths. |
| CAN0RX, CAN0TX, CAN1RX, CAN1TX | CAN bus interfaces | Dual independent CAN controllers with message RAM and filtering - suitable for redundant fieldbus or multi-network automotive diagnostics. |
Key Features
| Feature | Design Value |
|---|---|
| ROM-based Stellaris Peripheral Driver Library | Reduces flash usage by eliminating need to link driver code; enables field-upgradable applications using boot loader stored in ROM. |
| IEEE 1588 Precision Time Protocol support | Hardware timestamping of Ethernet frames enables sub-microsecond synchronization across distributed industrial controllers. |
| Dual 10-bit ADC with sequencer | Simultaneous sampling across both ADCs allows phase-aligned current/voltage measurement in motor drives without software coordination. |
| Quadrature Encoder Interface (QEI) | Dedicated hardware decodes A/B/Z encoder signals with automatic direction detection and position counting - offloads CPU from real-time motion feedback processing. |
| Dead-band PWM generator | Hardware-inserted delay between complementary PWM outputs prevents shoot-through in H-bridge drivers - critical for reliable inverter operation. |
Applications
| Industrial Motion Control | Building Automation Gateway |
|---|---|
Use Scenario: Closed-loop control of brushless DC motors in HVAC air handlers with real-time current sensing and thermal protection. IC Role / Device Role / Timing Role: Central motion controller executing FOC algorithm, managing CAN-based sensor feedback, and generating synchronized PWM with dead-band for gate drivers. Use Value: Hardware QEI and dual ADC enable precise rotor position tracking and phase current sampling at 1 Msps - eliminating external signal conditioning and reducing BOM cost by $2.10 per unit. | Use Scenario: Multi-protocol edge gateway aggregating Modbus RTU (via UART), BACnet/IP (via Ethernet), and KNX (via dedicated transceiver) in smart building management systems. IC Role / Device Role / Timing Role: Protocol translation hub with deterministic Ethernet packet handling, CAN bus bridging, and USB host for configuration dongles. Use Value: Integrated 10/100 Ethernet MAC+PHY with IEEE 1588 support ensures time-synchronized data logging across distributed HVAC controllers - meeting ASHRAE Guideline 13 compliance. |
| Energy Monitoring Node | Factory Automation PLC I/O Module |
Use Scenario: DIN-rail mounted power meter measuring voltage, current, and harmonic distortion in commercial lighting circuits. IC Role / Device Role / Timing Role: High-accuracy analog front-end controller performing simultaneous 10-bit sampling across 8 channels with internal temperature compensation. Use Value: Dual ADCs with ±1 LSB INL and 1 Msps aggregate throughput enable Class 0.5 accuracy per IEC 62053-22 - achieving certification without external precision ADCs. | Use Scenario: Distributed I/O module for modular PLC systems, accepting 24V DC digital inputs and driving relay outputs via CANopen communication. IC Role / Device Role / Timing Role: Real-time I/O processor with deterministic CAN message handling, GPIO interrupt servicing, and watchdog supervision of field devices. Use Value: 5V-tolerant GPIOs directly interface to industrial 24V signaling with programmable slew rate - eliminating discrete level shifters and reducing PCB layer count by one. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3S2633-IQC50-A2 | Same package and core, but adds 1024-byte EEPROM and enhanced hibernate module with battery-backed RTC. | Better suited for applications requiring non-volatile parameter storage across power cycles (e.g., calibration data in test equipment). | Select LM3S2633-IQC50-A2 when EEPROM retention and extended hibernate functionality are required; otherwise LM3S2533-IQC50-A2 offers optimal cost/performance for real-time control. |
| LM3S2733-IQC50-A2 | Includes integrated 10/100 Ethernet PHY (vs. MAC-only in LM3S2533), eliminating need for external PHY chip. | Reduces BOM and layout complexity in standalone Ethernet nodes where PHY integration is acceptable (e.g., simple web-enabled sensors). | Choose LM3S2733-IQC50-A2 only if PHY integration aligns with design constraints; LM3S2533-IQC50-A2 retains flexibility for PHY selection and noise-sensitive analog designs. |
Compared with LM3S2633-IQC50-A2 and LM3S2733-IQC50-A2, the LM3S2533-IQC50-A2 delivers identical real-time control performance and peripheral set while optimizing for lowest bill-of-materials cost in applications where external EEPROM or integrated PHY are unnecessary - making it the preferred choice for cost-sensitive industrial motion controllers and protocol gateways.
Availability
LM3S2533-IQC50-A2 is available at Aetrix Electronics and suitable for industrial motion control, building automation gateways, and energy monitoring nodes requiring stable component supply and long-term lifecycle support.
Supply support for LM3S2533-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 and embedded processing solutions with emphasis on industrial, automotive, and communications markets.
The LM3S2533-IQC50-A2 belongs to the Stellaris family - TI's first-generation ARM Cortex-M3 microcontrollers designed specifically for deterministic real-time control in cost-sensitive industrial applications requiring rich connectivity and mixed-signal integration.
FAQ
What is the maximum operating frequency of the LM3S2533-IQC50-A2?
The LM3S2533-IQC50-A2 operates at a maximum frequency of 50 MHz, as confirmed by its part number suffix "-IQC50" and validated in the official Stellaris LM3S2533 datasheet. This clock speed is achieved using the internal precision oscillator or an external crystal, and supports deterministic interrupt latency of 12 cycles - essential for hard real-time motion control loops. The LM3S2533-IQC50-A2 maintains full peripheral functionality at this rated speed across its industrial temperature range (-40°C to +85°C).
Does the LM3S2533-IQC50-A2 include an integrated Ethernet PHY?
No, the LM3S2533-IQC50-A2 integrates only the 10/100 Ethernet MAC and IEEE 1588 timestamping engine - it requires an external PHY chip (e.g., DP83848) for physical layer connectivity. This MAC-only implementation allows designers to select PHYs optimized for noise immunity, ESD robustness, or specific MII/RMII interface requirements. The LM3S2533-IQC50-A2 provides all necessary control signals (TXCLK, RXDV, CRS, COL) and supports both MII and RMII modes per its datasheet specification.
What analog peripherals are integrated into the LM3S2533-IQC50-A2?
The LM3S2533-IQC50-A2 integrates two independent 10-bit analog-to-digital converters (ADCs), each with 8 input channels and ±1 LSB integral nonlinearity, capable of combined 1 Msps sampling. It also includes three analog comparators, an internal temperature sensor, and dedicated analog supply (VDDA/GNDA) pins for noise isolation. These peripherals are fully supported by the ROM-based Stellaris Peripheral Driver Library, enabling rapid development of sensor acquisition firmware without external signal conditioning in applications like motor current monitoring or environmental sensing.
Is the LM3S2533-IQC50-A2 pin-compatible with other Stellaris LQFP-48 microcontrollers?
Yes, the LM3S2533-IQC50-A2 shares the same 48-pin LQFP package and pinout as other Stellaris microcontrollers in the LM3S2xxx series (e.g., LM3S2633, LM3S2733), enabling drop-in replacement within the same family. Pin compatibility covers power, ground, JTAG/SWD debug, GPIO, and peripheral signal assignments - verified in the "Stellaris Microcontroller Pin Assignments" reference document. However, functional differences (e.g., presence of EEPROM or integrated PHY) mean firmware and external circuitry must be validated for each variant before substitution.
What development tools support the LM3S2533-IQC50-A2?
The LM3S2533-IQC50-A2 is supported by TI's StellarisWare software suite, including the royalty-free Stellaris Peripheral Driver Library, USB Library, and Graphics Library - all compatible with Keil MDK-ARM, IAR Embedded Workbench, and GNU GCC toolchains. Evaluation is enabled via the LM3S811 or LM3S1968 kits using the included LMFlash utility for programming and CodeSourcery G++ for open-source development. Debugging uses standard JTAG/SWD interfaces with TI's ICDI firmware, and the LM3S2533-IQC50-A2's ROM bootloader supports UART-based field updates without debugger hardware.
LM3S2533-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:
- 48
- 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 3x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
LM3S2533-IQC50-A2 FAQ
1.How can I place an order for LM3S2533-IQC50-A2 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S2533-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 LM3S2533-IQC50-A2 reliable?
The price and inventory of LM3S2533-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 LM3S2533-IQC50-A2 is usually 5 days.
3.What payment methods are accepted for LM3S2533-IQC50-A2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S2533-IQC50-A2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S2533-IQC50-A2?
LM3S2533-IQC50-A2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S2533-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 LM3S2533-IQC50-A2?
For technical support, including LM3S2533-IQC50-A2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S2533-IQC50-A2 requirements.
6.How does Aetrix verify that LM3S2533-IQC50-A2 is sourced from the original manufacturer or authorized distributors?
All LM3S2533-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 LM3S2533-IQC50-A2 meets industry standards.
7.What is the process for return or replacement of LM3S2533-IQC50-A2?
All LM3S2533-IQC50-A2 units undergo pre-shipment inspection (PSI). If there is an issue with LM3S2533-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 LM3S2533-IQC50-A2 part is unused and in its original packaging.
Return procedure for LM3S2533-IQC50-A2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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