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Texas Instruments LM3S8933-EQC50-A2
- Part No.:
- LM3S8933-EQC50-A2
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
LM3S8933-EQC50-A2.pdf
- Description:
- IC MCU 32BIT 256KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,528
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Product details
Overview
LM3S8933-EQC50-A2 from Texas Instruments is a 32-bit ARM Cortex-M3 microcontroller with 256 KB flash, 64 KB SRAM, integrated CAN 2.0A/B controller, 12-bit ADC (up to 1 MSPS), and hibernation module supporting RTC and battery-backed memory. It operates at 50 MHz and targets industrial motor control and embedded automation systems requiring deterministic real-time response.
For engineers reviewing the LM3S8933-EQC50-A2 datasheet, LM3S8933-EQC50-A2 pinout, LM3S8933-EQC50-A2 application, or LM3S8933-EQC50-A2 equivalent, key selection criteria include its dual UARTs with IrDA/SIR support, 8-channel PWM with dead-band generation, hibernation current of 1.7 µA, and full CAN protocol stack readiness in StellarisWare®.
Technical Context
The LM3S8933-EQC50-A2 implements the ARMv7-M architecture with NVIC supporting 64 interrupt lines, 8 priority levels, and tail-chaining for sub-12-cycle interrupt latency. Its system-level peripherals include a hibernation module with dedicated 32.768 kHz crystal input, battery voltage monitoring, and wake-up on RTC match or external GPIO event.
Motor control capability is enabled by two 16-bit general-purpose timers configured as 8-channel PWM generators with configurable dead-band insertion and fault shutdown inputs. Analog subsystem includes four sample sequencers, hardware averaging (up to 64 samples), and internal temperature sensor calibrated to ±3°C accuracy.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 50 MHz max operation - enables deterministic real-time task scheduling with <12-cycle interrupt latency. |
| Flash / SRAM | 256 KB flash / 64 KB SRAM - supports full StellarisWare® driver library plus application code with room for field firmware updates. |
| ADC | 12-bit, 1 MSPS, 8-channel - provides high-resolution sampling for motor phase current sensing and analog feedback loops. |
| CAN Interface | CAN 2.0A/B compliant, 32 message objects - enables robust multi-node communication in industrial networks without external transceiver logic. |
| Hibernation Current | 1.7 µA (RTC active, battery-backed RAM retained) - allows years of operation on coin-cell backup in unpowered standby. |
| PWM Channels | 8 independent channels with dead-band and fault shutdown - supports three-phase inverter gate drive with cycle-by-cycle protection. |
| UARTs | 2x UART with IrDA/SIR, FIFO, and automatic baud-rate detection - simplifies host diagnostics and wireless telemetry integration. |
Pinout & Package
LM3S8933-EQC50-A2 is housed in a 100-pin LQFP (14 mm × 14 mm, 0.5 mm pitch) package with exposed thermal pad. Pin assignments are validated 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 stability. |
| GND, GNDA, GNDC | Ground returns | Dedicated analog and core ground planes reduce coupling between high-speed digital switching and precision analog paths. |
| OSC0/OSC1 | Primary crystal oscillator inputs | Supports 1–25 MHz crystal for main system clock; internal PLL generates 50 MHz CPU clock. |
| HIB_RTC_XTAL | Hibernation RTC crystal input | Accepts 32.768 kHz watch crystal for low-power timekeeping during hibernation mode. |
| CAN0RX/CAN0TX | CAN controller physical interface | Dedicated differential pair for CAN bus connection; requires external transceiver (e.g., SN65HVD230) for bus termination. |
| PD0/PD1 | UART0 transmit/receive | Default UART0 pins mapped to Port D; software-configurable to alternate functions including SSI0 or I2C0. |
Key Features
| Feature | Design Value |
|---|---|
| Hibernation Module | Full RTC + battery-backed 2 KB SRAM + voltage monitoring - enables secure, low-power state retention without external supervision circuitry. |
| Motor Control Timers | Two 16-bit GPTMs with PWM, capture, and quadrature encoder modes - supports precise timing for BLDC commutation and position feedback. |
| Integrated CAN Controller | 32 message objects with mask-based filtering and FIFO buffering - eliminates need for external CAN protocol handler in distributed control nodes. |
| Analog Subsystem | Four independent ADC sample sequencers with hardware averaging and temperature sensor - reduces MCU overhead for sensor fusion in closed-loop systems. |
| Debug Interface | SWD/JTAG with TPIU trace port - enables real-time instruction trace and non-intrusive debugging without halting CPU execution. |
Applications
| Industrial Motor Drive | Building Automation Node |
|---|---|
|
Use Scenario: Three-phase AC induction motor control with overcurrent protection and thermal monitoring. IC Role / Device Role / Timing Role: Real-time PWM generator, ADC data aggregator, CAN network node, and hibernation-aware system supervisor. Use Value: Integrated 8-channel PWM with dead-band and fault shutdown enables safe gate drive; hibernation mode extends battery life in wireless commissioning tools. |
Use Scenario: HVAC zone controller with temperature/humidity sensing, valve actuation, and BACnet/IP gateway via UART-to-Ethernet bridge. IC Role / Device Role / Timing Role: Sensor interface hub, actuator timing controller, and CAN/LON interoperability bridge using StellarisWare® protocol stacks. Use Value: Dual UARTs with IrDA support simplify infrared remote setup; 12-bit ADC resolves ±0.1°C temperature changes for PID loop stability. |
| Energy Metering Gateway | Factory Floor I/O Module |
|
Use Scenario: Smart electricity meter concentrator aggregating data from sub-meters via RS-485 and reporting via CAN or cellular modem. IC Role / Device Role / Timing Role: Serial protocol translator, RTC-synchronized data logger, and secure boot loader host. Use Value: Hibernation module maintains accurate time stamping during power outages; 256 KB flash stores firmware images for A/B update schemes. |
Use Scenario: DIN-rail mounted digital I/O expansion unit with 16 isolated inputs, 8 relay outputs, and CAN backbone connectivity. IC Role / Device Role / Timing Role: Isolation interface manager, watchdog-coordinated safety monitor, and deterministic CAN message scheduler. Use Value: 64 KB SRAM buffers burst I/O data during CAN bus congestion; NVIC prioritization ensures emergency stop signals preempt all other tasks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3S811-EQC50-A2 | Same Cortex-M3 core, but only 64 KB flash, 256-byte EEPROM, no CAN, no hibernation module. | Limited to simpler control tasks without networked communication or long-term battery backup. | Select when CAN and hibernation are unnecessary and cost reduction is critical. |
| Tiva C TM4C123GH6PM | Successor family with 80 MHz CPU, 256 KB flash, 32 KB SRAM, enhanced CAN, USB device/host, and updated StellarisWare® compatibility layer. | Better suited for USB-connected HMI, higher-speed motor control, and future-proof designs requiring extended lifecycle. | Choose for new designs needing longer manufacturer support and expanded peripheral set beyond LM3S8933-EQC50-A2 capabilities. |
Compared with LM3S811-EQC50-A2, LM3S8933-EQC50-A2 adds essential CAN and hibernation for distributed industrial nodes; versus TM4C123GH6PM, it offers proven qualification for legacy systems but lacks USB and newer power management features.
Availability
LM3S8933-EQC50-A2 is available at Aetrix Electronics and suitable for industrial motor drives, building automation controllers, energy metering gateways, and factory floor I/O modules requiring stable component supply across extended production lifecycles.
Supply support for LM3S8933-EQC50-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-grade microcontrollers.
The Stellaris LM3S series was designed specifically for deterministic real-time control in harsh environments, emphasizing low-latency interrupt handling, integrated analog interfaces, and robust communication peripherals like CAN and hibernation-ready RTC.
FAQ
What is the maximum operating frequency of the LM3S8933-EQC50-A2?
The LM3S8933-EQC50-A2 operates at a maximum CPU frequency of 50 MHz, achieved via an internal PLL that multiplies the input crystal or oscillator signal. This speed is fully supported across the industrial temperature range (–40°C to +85°C) and enables sub-microsecond interrupt response times required for motor control loops.
Does the LM3S8933-EQC50-A2 include a hardware CAN controller?
Yes, the LM3S8933-EQC50-A2 integrates a full CAN 2.0A/B-compliant controller with 32 message objects, programmable acceptance filtering, and FIFO buffering. It handles bit timing, arbitration, error detection, and retransmission autonomously-though an external CAN transceiver (e.g., SN65HVD230) is required for physical bus connection.
What is the hibernation current consumption of the LM3S8933-EQC50-A2?
The LM3S8933-EQC50-A2 achieves 1.7 µA hibernation current when the RTC is active and 2 KB of battery-backed SRAM is retained. This specification is measured at 3.3 V supply and 25°C, with the hibernation module powered from a coin-cell source and all other domains disabled.
How much flash and SRAM memory does the LM3S8933-EQC50-A2 provide?
The LM3S8933-EQC50-A2 includes 256 KB of on-chip flash memory for program storage and 64 KB of SRAM for runtime variables and stack operations. Both memory blocks are accessible via the Cortex-M3 bus matrix with zero-wait-state operation at 50 MHz, supporting efficient StellarisWare® driver execution.
Is the LM3S8933-EQC50-A2 pin-compatible with other Stellaris LM3S devices?
No, the LM3S8933-EQC50-A2 is not pin-compatible with other LM3S variants due to differences in peripheral mapping and package-specific pin assignments. Its 100-pin LQFP footprint and signal routing are unique to this part number; migration requires PCB redesign even within the same LM3S family.
LM3S8933-EQC50-A2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 100-LQFP
- Series:
- Stellaris® ARM® Cortex®-M3S 8000
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not 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 ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
LM3S8933-EQC50-A2 FAQ
1.How can I place an order for LM3S8933-EQC50-A2 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S8933-EQC50-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-EQC50-A2 reliable?
The price and inventory of LM3S8933-EQC50-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-EQC50-A2 is usually 5 days.
3.What payment methods are accepted for LM3S8933-EQC50-A2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S8933-EQC50-A2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S8933-EQC50-A2?
LM3S8933-EQC50-A2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S8933-EQC50-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-EQC50-A2?
For technical support, including LM3S8933-EQC50-A2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S8933-EQC50-A2 requirements.
6.How does Aetrix verify that LM3S8933-EQC50-A2 is sourced from the original manufacturer or authorized distributors?
All LM3S8933-EQC50-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-EQC50-A2 meets industry standards.
7.What is the process for return or replacement of LM3S8933-EQC50-A2?
All LM3S8933-EQC50-A2 units undergo pre-shipment inspection (PSI). If there is an issue with LM3S8933-EQC50-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-EQC50-A2 part is unused and in its original packaging.
Return procedure for LM3S8933-EQC50-A2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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