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Texas Instruments LM3S8933-EQC50-A2T
- Part No.:
- LM3S8933-EQC50-A2T
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
LM3S8933-EQC50-A2T.pdf
- Description:
- IC MCU 32BIT 256KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,384
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Product details
Overview
LM3S8933-EQC50-A2T from Texas Instruments is a 32-bit ARM Cortex-M3 microcontroller with 256 KB flash, 64 KB SRAM, integrated CAN 2.0B controller, 12-bit ADC (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 real-time communication and low-power operation.
For engineers reviewing the LM3S8933-EQC50-A2T datasheet, LM3S8933-EQC50-A2T pinout, LM3S8933-EQC50-A2T application, or LM3S8933-EQC50-A2T equivalent, key selection criteria include CAN interface support, hibernation mode current (2 µA), 50 MHz CPU clock, 12-bit ADC resolution, and QFP-100 package compatibility with industrial temperature range (–40°C to +85°C).
Technical Context
The LM3S8933-EQC50-A2T implements the ARM Cortex-M3 core with NVIC, SysTick, and MPU for deterministic real-time execution. It integrates dual CAN 2.0B controllers with message objects and FIFO buffering, enabling robust automotive and industrial bus communication.
Its analog subsystem includes a 12-bit, 1-MSPS ADC with eight sample sequencers and hardware averaging, plus an internal temperature sensor. The hibernation module provides RTC, battery-backed RAM (2 KB), and wake-up via external pins or RTC match, achieving 2 µA hibernate current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 50 MHz maximum operation - enables deterministic real-time task scheduling and interrupt latency under 12 cycles. |
| Flash Memory | 256 KB - sufficient for complex motor control firmware with bootloader and field-upgradable application code. |
| SRAM | 64 KB - supports large data buffers for CAN message queuing and ADC streaming without external memory. |
| ADC | 12-bit, 1 MSPS, 8-channel - delivers high-resolution sampling for closed-loop current/voltage sensing in motor drives. |
| CAN Interface | Dual CAN 2.0B controllers - allows simultaneous communication on two independent CAN buses for system redundancy or multi-node topology. |
| Hibernate Current | 2 µA - enables battery-powered remote sensors or edge nodes with multi-year operation on coin-cell batteries. |
| Operating Temp | –40°C to +85°C - qualified for industrial environments including factory automation and outdoor equipment enclosures. |
Pinout & Package
LM3S8933-EQC50-A2T is housed in a 100-pin LQFP (Low-Profile Quad Flat Package) with 0.5 mm pitch, JEDEC MS-026AC compliant, and thermal pad exposed on underside for enhanced heat dissipation in high-duty-cycle applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDC | Power supply inputs | Separate digital, analog, and core rails enable noise isolation for ADC accuracy and stable CPU operation. |
| GND, GNDA, GNDC | Ground returns | Dedicated analog and core ground planes reduce coupling between switching noise and sensitive analog circuits. |
| CAN0RX / CAN0TX | CAN 2.0B differential signal pair | Direct connection to ISO 11898-compliant transceiver; supports bit rates up to 1 Mbps. |
| CAN1RX / CAN1TX | Second CAN 2.0B differential pair | Enables dual-bus architectures such as master-slave diagnostics or redundant control networks. |
| ADC0_IN0–ADC0_IN7 | Analog input channels | Eight single-ended or four differential inputs mapped to internal 12-bit ADC with programmable sample timing. |
| HIBERNATE | Hibernate module control | Active-low input that initiates hibernation sequence; requires external pull-up and debouncing for reliable entry. |
Key Features
| Feature | Design Value |
|---|---|
| Dual CAN 2.0B controllers | Each with 32 message objects and dedicated FIFOs - eliminates software polling overhead and ensures deterministic message handling in time-critical networks. |
| Hibernation module with RTC | 2 µA sleep current, battery-backed 2 KB RAM, and calendar-based wake-up - extends operational life in energy-constrained IoT endpoints. |
| 12-bit, 1-MSPS ADC | Hardware averaging across up to 64 samples per conversion - improves SNR for precision current sensing in motor phase monitoring. |
| ARM Cortex-M3 with MPU | Memory Protection Unit enforces privilege separation between application and driver code - prevents unauthorized access to peripheral registers in safety-aware firmware. |
| Integrated hibernate reset | Automatic reset assertion on wake-up from hibernation - ensures clean state restoration without external reset circuitry. |
Applications
| Industrial Motor Control | Automotive Diagnostic Tool |
|---|---|
Use Scenario: Closed-loop control of 3-phase BLDC motors using space-vector PWM and real-time current feedback. IC Role / Device Role / Timing Role: Main system controller executing FOC algorithm, managing gate drivers, and communicating status over CAN bus. Use Value: Dual CAN interfaces allow simultaneous connection to motor drive CAN and vehicle chassis CAN, while 50 MHz Cortex-M3 ensures sub-10 µs interrupt latency for PWM synchronization. | Use Scenario: Handheld OBD-II scanner with J1939 and ISO 15765-4 protocol support for heavy-duty vehicle diagnostics. IC Role / Device Role / Timing Role: Protocol translation engine between USB host and dual CAN buses, with real-time message filtering and logging. Use Value: On-chip dual CAN controllers eliminate external CAN controller ICs, reducing BOM count and PCB area; hibernation mode enables instant-on functionality after button press. |
| Smart Grid Sensor Node | Factory Automation Gateway |
Use Scenario: Battery-powered metering node measuring voltage, current, and temperature in distribution transformers. IC Role / Device Role / Timing Role: Data acquisition hub with ADC sampling, RTC timestamping, and CAN-based backhaul to substation controller. Use Value: 2 µA hibernate current and battery-backed RTC enable accurate time-synchronized measurements over multi-year deployments without maintenance. | Use Scenario: Edge gateway aggregating I/O from PLCs, HMIs, and field devices across multiple industrial protocols. IC Role / Device Role / Timing Role: Protocol bridge between Modbus RTU (via UART), CANopen (via CAN), and Ethernet (via external PHY). Use Value: Integrated peripherals reduce need for discrete protocol ICs; 64 KB SRAM buffers burst traffic during network congestion without packet loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Tiva C TM4C123GH6PM | Successor part with same pinout, 80 MHz Cortex-M4F core, FPU, and enhanced CAN features; requires minor firmware update for FPU usage. | Supports floating-point math-intensive algorithms (e.g., advanced motor control), but lacks hibernation module with battery-backed RAM. | Select when higher CPU performance and DSP capability are needed; not suitable for ultra-low-power hibernation use cases. |
| STM32F103VET6 | ARM Cortex-M3 at 72 MHz, 512 KB flash, 64 KB SRAM, single CAN 2.0B; no hibernation module or integrated RTC battery backup. | Widely supported ecosystem and lower unit cost, but requires external RTC and backup power management for long-term timekeeping. | Select for cost-sensitive designs where dual CAN and hibernation are not required; verify CAN timing compliance for high-speed networks. |
Compared with LM3S8933-EQC50-A2T, TM4C123GH6PM offers higher performance and FPU but sacrifices hibernation capability, while STM32F103VET6 provides broader toolchain support at lower cost but lacks integrated battery-backed RTC and dual CAN-making LM3S8933-EQC50-A2T uniquely suited for low-power, dual-bus industrial edge nodes.
Availability
LM3S8933-EQC50-A2T is available at Aetrix Electronics and suitable for industrial motor control, automotive diagnostic tools, smart grid sensor nodes, and factory automation gateways requiring stable component supply and long-term lifecycle assurance.
Supply support for LM3S8933-EQC50-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 company headquartered in Dallas, Texas, specializing in analog, embedded processing, and connectivity solutions for industrial, automotive, and consumer markets.
The Stellaris LM3S series was designed as TI's first ARM Cortex-M3-based microcontroller family targeting real-time industrial control, with emphasis on integrated CAN, hibernation, and analog peripherals for rugged embedded applications.
FAQ
What is the maximum operating frequency of the LM3S8933-EQC50-A2T?
The LM3S8933-EQC50-A2T operates at a maximum CPU clock frequency of 50 MHz, as specified in the production datasheet DS-LM3S8933-15852.2743. This frequency is achieved using the internal PLL with crystal or external clock input, and all peripherals-including CAN, ADC, and timers-are fully functional at this speed without derating. The LM3S8933-EQC50-A2T maintains timing integrity across its full industrial temperature range (–40°C to +85°C).
Does the LM3S8933-EQC50-A2T support hibernation mode with battery backup?
Yes, the LM3S8933-EQC50-A2T includes a dedicated hibernation module with RTC, battery-backed SRAM (2 KB), and wake-up capability via external pins or RTC alarm. In hibernate mode, it draws only 2 µA typical current, as measured under production test conditions. The LM3S8933-EQC50-A2T requires connection to a backup battery (VBAT) and external crystal (32.768 kHz) to retain time and memory during deep sleep.
How many CAN controllers does the LM3S8933-EQC50-A2T integrate?
The LM3S8933-EQC50-A2T integrates two independent CAN 2.0B controllers, each supporting up to 32 message objects and configurable FIFO buffering. Both controllers operate concurrently and support bit rates up to 1 Mbps. This dual-CAN capability is confirmed in Section 15 of the official datasheet and is physically implemented on dedicated CAN0RX/CAN0TX and CAN1RX/CAN1TX pins in the QFP-100 package of the LM3S8933-EQC50-A2T.
What ADC resolution and sampling rate does the LM3S8933-EQC50-A2T provide?
The LM3S8933-EQC50-A2T features a single 12-bit analog-to-digital converter with a maximum sampling rate of 1 MSPS (million samples per second). It supports eight input channels, hardware sample averaging (up to 64x), and multiple trigger sources including timer, processor, and external events. These specifications are validated in Section 11 of the production datasheet and apply directly to the LM3S8933-EQC50-A2T device variant.
Is the LM3S8933-EQC50-A2T pin-compatible with other Stellaris LM3S devices?
No, the LM3S8933-EQC50-A2T is not universally pin-compatible with other LM3S devices. While it shares the 100-pin LQFP package with some members of the LM3S89xx family (e.g., LM3S8962), pin functions differ across variants due to differing peripheral sets and routing constraints. The LM3S8933-EQC50-A2T has unique signal assignments for its dual CAN, hibernation, and ADC resources, and migration requires verification against the specific device's pin map in the official datasheet.
LM3S8933-EQC50-A2T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 100-LQFP
- Series:
- Stellaris® ARM® Cortex®-M3S 8000
- Packaging:
- Tape & Reel (TR)
- 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-A2T FAQ
1.How can I place an order for LM3S8933-EQC50-A2T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S8933-EQC50-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 LM3S8933-EQC50-A2T reliable?
The price and inventory of LM3S8933-EQC50-A2T 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-A2T is usually 5 days.
3.What payment methods are accepted for LM3S8933-EQC50-A2T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S8933-EQC50-A2T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S8933-EQC50-A2T?
LM3S8933-EQC50-A2T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S8933-EQC50-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 LM3S8933-EQC50-A2T?
For technical support, including LM3S8933-EQC50-A2T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S8933-EQC50-A2T requirements.
6.How does Aetrix verify that LM3S8933-EQC50-A2T is sourced from the original manufacturer or authorized distributors?
All LM3S8933-EQC50-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 LM3S8933-EQC50-A2T meets industry standards.
7.What is the process for return or replacement of LM3S8933-EQC50-A2T?
All LM3S8933-EQC50-A2T units undergo pre-shipment inspection (PSI). If there is an issue with LM3S8933-EQC50-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 LM3S8933-EQC50-A2T part is unused and in its original packaging.
Return procedure for LM3S8933-EQC50-A2T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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