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Texas Instruments LM3S8933-IQC50-A2
- Part No.:
- LM3S8933-IQC50-A2
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
LM3S8933-IQC50-A2.pdf
- Description:
- IC MCU 32BIT 256KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,778
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Product details
Overview
LM3S8933-IQC50-A2 from Texas Instruments is a 32-bit ARM Cortex-M3 microcontroller with 256 KB flash, 64 KB SRAM, integrated CAN, USB, Ethernet MAC, ADC (12-bit, 1 MSPS), and dual PWM modules. It operates at 50 MHz and supports industrial temperature range (–40°C to +85°C) in a 100-pin LQFP package. It serves as main system controller in motor drives requiring real-time control, communication, and analog sensing.
For engineers reviewing the LM3S8933-IQC50-A2 datasheet, LM3S8933-IQC50-A2 pinout, LM3S8933-IQC50-A2 application, or LM3S8933-IQC50-A2 equivalent, key selection criteria include its integrated CAN 2.0B controller, 10/100 Ethernet MAC without PHY, USB 2.0 device support, hibernation module with RTC and battery-backed memory, and dual 16/32-bit general-purpose timers with PWM capability.
Technical Context
The LM3S8933-IQC50-A2 implements the ARM Cortex-M3 core with NVIC, SysTick, and MPU, enabling deterministic interrupt handling and memory protection for safety-critical embedded systems. Its peripheral set includes a full CAN 2.0B controller with 32 message objects, a 10/100 Ethernet MAC supporting MII/RMII, and a USB 2.0 device controller compliant with USB 2.0 specification.
It integrates a 12-bit, 1 MSPS ADC with eight sample sequencers and hardware averaging, plus two independent PWM generator modules-each supporting up to eight PWM outputs with dead-band generation and fault handling-making it suitable for closed-loop motor control applications requiring precise timing and synchronized analog capture.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3 running at 50 MHz; enables deterministic real-time execution with <12-cycle interrupt latency. |
| Memory | 256 KB on-chip flash + 64 KB SRAM; sufficient for complex motor control firmware with protocol stacks and data buffers. |
| ADC | 12-bit, 1 MSPS with 8-channel input multiplexer and hardware averaging; supports simultaneous sampling of current/voltage feedback in BLDC/PMSM drives. |
| CAN Interface | CAN 2.0B controller with 32 message objects and programmable bit timing; enables robust fieldbus communication in industrial automation networks. |
| Ethernet | 10/100 Mbps MAC with MII/RMII support; allows direct connection to external PHY for wired industrial IoT connectivity without external bridge IC. |
| PWM Modules | Dual PWM generators, each with 8 outputs, dead-band insertion, and fault inputs; supports three-phase inverter gate drive with cycle-by-cycle protection. |
| Operating Temp | –40°C to +85°C; qualified for use in enclosed motor control cabinets and outdoor industrial enclosures without active cooling. |
Pinout & Package
LM3S8933-IQC50-A2 is housed in a 100-pin LQFP (14 mm × 14 mm, 0.5 mm pitch) package with exposed thermal pad. Pin assignments are defined per TI SPMS173I datasheet Rev I (July 2014).
| 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 operation. |
| PA0–PA7, PB0–PB7, etc. | GPIO banks A–G | Configurable 5-V-tolerant I/O with slew-rate control; supports UART, I²C, SSI, and PWM output mapping across multiple ports. |
| USB0EPEN, USB0P, USB0M | USB 2.0 device interface | Dedicated differential pair + pull-up enable; requires external 1.5-kΩ pull-up on D+ for enumeration as full-speed USB device. |
| CAN0RX, CAN0TX | CAN physical layer interface | CMOS-level signals requiring external transceiver (e.g., SN65HVD230) for bus coupling and common-mode rejection. |
| EMAC0RXD0–EMAC0RXD3, EMAC0TXD0–EMAC0TXD3 | Ethernet MAC data lines | MII interface pins; RMII mode uses subset (TXD0/1, RXD0/1, TXEN, CRS_DV, REF_CLK) to reduce pin count. |
Key Features
| Feature | Design Value |
|---|---|
| Hibernation Module | Integrated RTC, battery-backed RAM (2 KB), and wake-on-RTC/external-pin/CAN activity; enables ultra-low-power standby in remote monitoring nodes. |
| Dual PWM Generators | Each supports 8 PWM outputs with independent period/duty registers, dead-band control, and synchronous update; eliminates need for external PWM IC in servo drives. |
| USB + CAN + Ethernet Coexistence | All three interfaces operate concurrently under NVIC priority management; supports multi-protocol gateway designs without external bridging logic. |
| Analog Subsystem | 12-bit ADC with 8 sequencers, 16-sample hardware averaging, and internal temperature sensor; enables on-chip thermal monitoring and precision current loop measurement. |
| System Control Block | Includes clock gating, reset control, power management (sleep/deep-sleep), and device identification registers; simplifies low-power state transitions and BOM traceability. |
Applications
| Industrial Motor Drive | Building Automation Gateway |
|---|---|
Use Scenario: Closed-loop control of 3-phase PMSM motors in HVAC compressors with field-oriented control (FOC) algorithm. IC Role / Device Role / Timing Role: Primary real-time controller executing FOC loop at 10–20 kHz, managing ADC sampling, PWM generation, CAN diagnostics, and thermal shutdown. Use Value: Integrated dual PWM with dead-band and fault inputs eliminates external gate driver protection logic; CAN 2.0B enables interoperability with BACnet MS/TP field devices. | Use Scenario: Protocol translation node connecting Modbus RTU field sensors to Ethernet-based BMS via TCP/IP. IC Role / Device Role / Timing Role: Dual-interface gateway running Modbus slave stack on UART and TCP/IP stack on Ethernet MAC, with CAN used for local actuator coordination. Use Value: Concurrent USB (for configuration), CAN (for local control), and Ethernet (for cloud upload) reduces external interface IC count by ≥3 components. |
| Programmable Logic Controller (PLC) I/O Module | Energy Meter Data Concentrator |
Use Scenario: DIN-rail mounted I/O expansion module with 16 digital inputs, 8 relay outputs, and analog current loop inputs. IC Role / Device Role / Timing Role: Central processor managing isolated GPIO scanning, 4–20 mA analog conditioning, watchdog supervision, and EtherNet/IP messaging. Use Value: 64 KB SRAM accommodates dual firmware images for safe over-the-air updates; hibernation module preserves last known state during brownout events. | Use Scenario: Substation-level meter aggregation unit collecting pulse outputs and RS-485 Modbus data from 32 smart meters. IC Role / Device Role / Timing Role: Time-synchronized data concentrator using RTC alarm to trigger hourly meter reads and store timestamps in battery-backed RAM. Use Value: 2 KB battery-backed memory retains time-stamped energy logs for ≥72 hours during AC power loss; CAN interface enables daisy-chain topology with minimal wiring. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3S9B92-IQC50-A2 | Same Cortex-M3 core, 512 KB flash, 96 KB SRAM, identical peripherals and pinout; higher memory density. | Supports larger protocol stacks (e.g., full TCP/IP + TLS) and extended data logging without external SPI flash. | Select when firmware size exceeds 256 KB or long-term data buffering is required beyond on-chip SRAM capacity. |
| Tiva C TM4C123GH6PM | Successor family with same footprint, 80 MHz CPU, enhanced USB OTG, and improved ADC performance; requires minor register-level code adaptation. | Better suited for new designs targeting longer product lifecycle and extended peripheral support (e.g., QEI, motion control accelerators). | Choose for new designs where TI's long-term availability commitment and enhanced feature set justify migration effort. |
Compared with LM3S8933-IQC50-A2, LM3S9B92-IQC50-A2 offers doubled flash/SRAM for complex firmware while maintaining full hardware compatibility, whereas TM4C123GH6PM provides higher performance and modern peripheral enhancements but requires software porting-making the former ideal for memory-constrained upgrades and the latter for next-generation platforms.
Availability
LM3S8933-IQC50-A2 is available at Aetrix Electronics and suitable for industrial motor drives, building automation gateways, PLC I/O modules, and energy meter concentrators requiring stable component supply and long-lifecycle support.
Supply support for LM3S8933-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 company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and consumer markets since 1930.
The Stellaris LM3S series was designed as the first ARM Cortex-M3-based MCU family for cost-sensitive, real-time industrial control applications-emphasizing integration of CAN, Ethernet, USB, and motor control peripherals in a single chip.
FAQ
What is the maximum operating frequency of the LM3S8933-IQC50-A2?
The LM3S8933-IQC50-A2 operates at a maximum system clock frequency of 50 MHz, derived from an internal PLL that multiplies the crystal oscillator input. This frequency is specified across the full industrial temperature range (–40°C to +85°C) and supports deterministic real-time execution for motor control loops and protocol stacks. The LM3S8933-IQC50-A2 achieves this speed while maintaining low dynamic power consumption through adaptive clock gating and sleep mode entry.
Does the LM3S8933-IQC50-A2 include an integrated Ethernet PHY?
No, the LM3S8933-IQC50-A2 includes only a 10/100 Ethernet MAC with MII and RMII interfaces-it requires an external PHY (e.g., DP83848 or LAN8720) for physical layer signaling. This architecture allows design flexibility in selecting PHYs with specific features like ESD protection, transformerless operation, or industrial temperature rating. The LM3S8933-IQC50-A2 provides all MAC-layer registers, DMA support, and interrupt handling needed for full TCP/IP stack implementation.
Can the LM3S8933-IQC50-A2 support USB device and CAN simultaneously?
Yes, the LM3S8933-IQC50-A2 supports concurrent operation of its USB 2.0 full-speed device controller and dual CAN 2.0B controllers without resource conflict. Its NVIC prioritizes interrupts independently per peripheral, and dedicated DMA channels prevent CPU bottlenecks during high-throughput transfers. This capability is validated in TI's Stellaris Peripheral Driver Library examples, where the LM3S8933-IQC50-A2 runs USB HID and CANopen stacks simultaneously in real-world gateway applications.
What is the purpose of the hibernation module in the LM3S8933-IQC50-A2?
The hibernation module in the LM3S8933-IQC50-A2 provides ultra-low-power retention mode with integrated RTC, 2 KB battery-backed RAM, and wake sources including RTC alarm, external GPIO, and CAN bus activity. It draws ≤1.1 µA typical in hibernate mode with RTC running, enabling battery-powered remote sensors or backup controllers to maintain timekeeping and critical state for months. The LM3S8933-IQC50-A2 uses this module to preserve firmware context and timestamped logs during AC power loss without external supercapacitors or backup batteries.
Is the LM3S8933-IQC50-A2 pin-compatible with other Stellaris LM3S devices?
The LM3S8933-IQC50-A2 is pin-compatible with other 100-pin LQFP Stellaris MCUs in the LM3S8xxx and LM3S9xxx families-including LM3S811, LM3S8962, and LM3S9B92-sharing identical mechanical footprint, power pin locations, and core peripheral mappings. However, peripheral enablement (e.g., Ethernet MAC presence) and memory sizes differ across variants, so PCB layout reuse is possible but firmware must be verified for peripheral availability. The LM3S8933-IQC50-A2 specifically enables Ethernet, USB, and dual CAN on this pinout.
LM3S8933-IQC50-A2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 100-LQFP
- Series:
- Stellaris® ARM® Cortex®-M3S 8000
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Verified
- Core Processor:
- ARM® Cortex®-M3
- Core Size:
- 32-Bit Single-Core
- Speed:
- 50MHz
- Connectivity:
- CANbus, Ethernet, I2C, IrDA, Microwire, SPI, SSI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O:
- 36
- Program Memory Size:
- 256KB (256K 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 (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
LM3S8933-IQC50-A2 FAQ
1.How can I place an order for LM3S8933-IQC50-A2 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S8933-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 LM3S8933-IQC50-A2 reliable?
The price and inventory of LM3S8933-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 LM3S8933-IQC50-A2 is usually 5 days.
3.What payment methods are accepted for LM3S8933-IQC50-A2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S8933-IQC50-A2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S8933-IQC50-A2?
LM3S8933-IQC50-A2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S8933-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 LM3S8933-IQC50-A2?
For technical support, including LM3S8933-IQC50-A2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S8933-IQC50-A2 requirements.
6.How does Aetrix verify that LM3S8933-IQC50-A2 is sourced from the original manufacturer or authorized distributors?
All LM3S8933-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 LM3S8933-IQC50-A2 meets industry standards.
7.What is the process for return or replacement of LM3S8933-IQC50-A2?
All LM3S8933-IQC50-A2 units undergo pre-shipment inspection (PSI). If there is an issue with LM3S8933-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 LM3S8933-IQC50-A2 part is unused and in its original packaging.
Return procedure for LM3S8933-IQC50-A2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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