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Texas Instruments LM3S8933-IQC50-A2T
- Part No.:
- LM3S8933-IQC50-A2T
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
LM3S8933-IQC50-A2T.pdf
- Description:
- IC MCU 32BIT 256KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,274
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Product details
Overview
LM3S8933-IQC50-A2T 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 motor control and industrial automation systems requiring real-time deterministic response.
For engineers reviewing the LM3S8933-IQC50-A2T datasheet, LM3S8933-IQC50-A2T pinout, LM3S8933-IQC50-A2T application, or LM3S8933-IQC50-A2T equivalent, key selection considerations include its integrated CAN interface, hibernation power management, dual UARTs with IrDA support, and hardware-accelerated PWM timing for motor drive control loops.
Technical Context
The LM3S8933-IQC50-A2T implements the ARM Cortex-M3 core with NVIC, SysTick, and MPU, enabling deterministic interrupt handling and memory protection in safety-critical embedded systems. It integrates a dedicated hibernation module with RTC, battery-backed RAM, and wake-up sources including external pins and RTC match events.
Its peripheral set includes two UARTs (one with IrDA SIR), two SSI interfaces, I²C master/slave, 8-channel 12-bit ADC with hardware averaging, four 32/16-bit general-purpose timers (including RTC mode), and a full CAN 2.0A/B controller with 32 message objects and programmable FIFOs - all clocked from a configurable PLL-based system clock up to 50 MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 32-bit RISC, supports Thumb-2 instruction set for code density and performance efficiency |
| Max Clock Speed | 50 MHz - enables real-time execution of motor control algorithms with sub-microsecond timer resolution |
| Flash Memory | 256 KB - sufficient for complex firmware with bootloader, application, and field-upgrade image storage |
| SRAM | 64 KB - supports large data buffers, stack depth for nested interrupts, and real-time control variables |
| ADC | 12-bit, 1 MSPS, 8-channel - provides high-resolution analog sensing for current/voltage feedback in motor drives |
| CAN Interface | CAN 2.0A/B compliant with 32 message objects - enables robust industrial fieldbus communication without external transceiver logic |
| Hibernation Module | RTC + battery-backed 2 KB RAM + wake-on-RTC-match/external-pin - reduces system standby power to < 1.5 µA |
Pinout & Package
LM3S8933-IQC50-A2T 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 revision I, with dedicated JTAG/SWD debug, GPIO multiplexing across 6 ports (A–F), and peripheral-specific pin groups for CAN, UART, SSI, I²C, and ADC.
| 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 |
| GND, GNDA, GNDC | Ground returns | Dedicated analog and core ground planes minimize coupling noise into sensitive analog and clock circuits |
| PA0–PA7, PB0–PB7, etc. | GPIO port pins | Multi-function pins supporting UART, SSI, I²C, PWM, and ADC inputs - configurable via GPIO AFSEL and PCTL registers |
| PD0, PD1 | CAN0RX / CAN0TX | Dedicated differential CAN bus interface pins - require external CAN transceiver (e.g., SN65HVD230) for physical layer compliance |
| PF0–PF3 | JTAG/SWD debug | Supports SWDIO, SWCLK, nRESET - enables in-circuit debugging without full JTAG connector footprint |
Key Features
| Feature | Design Value |
|---|---|
| Hibernation module with RTC | Enables ultra-low-power sleep modes (< 1.5 µA) while maintaining timekeeping and retaining critical state in battery-backed RAM |
| Integrated CAN 2.0A/B controller | Reduces BOM count by eliminating need for external CAN protocol handler; supports prioritized message transmission and filtering |
| Hardware PWM with dead-band generation | Four 32/16-bit timers support complementary PWM outputs with programmable dead time - essential for three-phase motor gate drive |
| Dual UART with IrDA SIR | Enables serial diagnostics and remote firmware updates over infrared link without additional PHY components |
| 12-bit ADC with hardware averaging | Improves effective resolution to ~13.5 bits for motor current sensing without CPU overhead or software filtering latency |
Applications
| Industrial Motor Control | Building Automation Systems |
|---|---|
Use Scenario: Closed-loop control of BLDC and stepper motors in HVAC actuators and conveyor drives. IC Role / Device Role / Timing Role: Real-time execution of FOC (Field-Oriented Control) algorithms using PWM timers, ADC sampling, and CAN-based command distribution. Use Value: Deterministic 50 MHz Cortex-M3 execution and hardware PWM dead-band insertion ensure precise phase timing and prevent shoot-through in inverter bridges. | Use Scenario: Central controller for lighting, access control, and environmental monitoring nodes in smart buildings. IC Role / Device Role / Timing Role: System coordinator interfacing with sensors (temp/humidity), relays, and CAN-connected subsystems via integrated peripherals. Use Value: Integrated CAN and hibernation module allow reliable communication over long cable runs and multi-day battery backup during mains failure. |
| Energy Metering Gateways | Factory Floor PLC I/O Modules |
Use Scenario: Data aggregation unit collecting meter readings from RS-485 or M-Bus endpoints and forwarding via CAN or Ethernet gateway. IC Role / Device Role / Timing Role: Protocol translation engine with UART-to-CAN bridging, timestamping via RTC, and secure firmware update handling. Use Value: Dual UARTs with IrDA support enable field technician diagnostics without opening enclosures; hibernation preserves time and configuration during brownouts. | Use Scenario: Distributed digital input/output expansion module for legacy PLC systems using CANopen or custom CAN protocols. IC Role / Device Role / Timing Role: Peripheral interface hub managing opto-isolated DI/DO, analog inputs, and CAN network stack with message object filtering. Use Value: 32-message-object CAN controller handles concurrent status reporting, command reception, and error logging without host CPU intervention. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TM4C123GH6PM | Successor device with same Cortex-M4F core, 256 KB flash, but higher 80 MHz clock, FPU, and enhanced CAN features (CAN FD optional) | Requires updated toolchain and driver migration; supports floating-point math for advanced control algorithms | Select when upgrading legacy LM3S designs for improved performance, FPU, or future CAN FD readiness |
| STM32F103VET6 | ARM Cortex-M3 at 72 MHz, 512 KB flash, 64 KB SRAM, but no native CAN 2.0B or hibernation module - requires external RTC/battery circuit | Lacks integrated hibernation and has different peripheral register mapping; CAN implementation requires more software overhead | Select for cost-sensitive applications where CAN 2.0A suffices and external RTC is acceptable |
Compared with TM4C123GH6PM and STM32F103VET6, the LM3S8933-IQC50-A2T offers unique integration of CAN 2.0B, hibernation with RTC, and deterministic 50 MHz operation - making it optimal for space-constrained industrial nodes where legacy StellarisWare software reuse and ultra-low standby power are design priorities.
Availability
LM3S8933-IQC50-A2T is available at Aetrix Electronics and suitable for industrial motor control, building automation systems, energy metering gateways, and factory floor PLC I/O modules requiring stable component supply and long-term lifecycle support.
Supply support for LM3S8933-IQC50-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 technologies for industrial, automotive, and consumer markets.
The Stellaris LM3S series was designed as Texas Instruments' first ARM-based microcontroller family targeting deterministic real-time control in resource-constrained industrial environments - emphasizing integrated peripherals, low-power hibernation, and CAN-ready communication.
FAQ
What is the maximum operating frequency of the LM3S8933-IQC50-A2T?
The LM3S8933-IQC50-A2T operates at a maximum system clock frequency of 50 MHz, achieved via an internal PLL that multiplies the crystal or external clock input. This speed is specified under industrial temperature range (–40°C to +85°C) and 3.3 V supply conditions per the SPMS173I datasheet. The LM3S8933-IQC50-A2T maintains full peripheral functionality-including CAN, ADC, and timers-at this rated frequency.
Does the LM3S8933-IQC50-A2T support CAN FD?
No, the LM3S8933-IQC50-A2T implements a CAN 2.0A/B controller compliant with ISO 11898-1:2003, supporting standard (11-bit) and extended (29-bit) identifiers and bit rates up to 1 Mbps. It does not support CAN FD features such as flexible data-rate or larger payload sizes. For CAN FD capability, consider the successor TM4C123GH6PM with optional CAN FD peripheral or external transceivers.
What debug interface does the LM3S8933-IQC50-A2T use?
The LM3S8933-IQC50-A2T supports both JTAG and Serial Wire Debug (SWD) via pins PF0–PF3. SWD mode uses SWDIO and SWCLK signals and is enabled by default on reset, allowing debugging with minimal pin count. The LM3S8933-IQC50-A2T is fully compatible with TI's ICDI-based debug probes (e.g., Tiva C Series LaunchPad) and third-party CMSIS-DAP tools.
How much battery-backed memory does the hibernation module provide?
The hibernation module in the LM3S8933-IQC50-A2T includes 2 KB of battery-backed SRAM, accessible only during hibernation or wake-up sequences. This memory retains critical state (e.g., RTC time, calibration values, fault logs) when main power is removed and VBAT is supplied. The LM3S8933-IQC50-A2T also integrates a 32-bit RTC counter and alarm comparator within the same module.
Is the LM3S8933-IQC50-A2T pin-compatible with other LM3S devices?
The LM3S8933-IQC50-A2T is not universally pin-compatible across the LM3S family. It uses a 100-pin LQFP package shared with select variants (e.g., LM3S8962), but pin functions differ significantly due to peripheral enablement and routing constraints. For example, CAN0TX/RX are fixed to PD0/PD1 on LM3S8933-IQC50-A2T but assigned to alternate pins on other members. Always verify pin mapping against SPMS173I for each specific variant.
LM3S8933-IQC50-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:
- 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-A2T FAQ
1.How can I place an order for LM3S8933-IQC50-A2T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S8933-IQC50-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-IQC50-A2T reliable?
The price and inventory of LM3S8933-IQC50-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-IQC50-A2T is usually 5 days.
3.What payment methods are accepted for LM3S8933-IQC50-A2T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S8933-IQC50-A2T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S8933-IQC50-A2T?
LM3S8933-IQC50-A2T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S8933-IQC50-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-IQC50-A2T?
For technical support, including LM3S8933-IQC50-A2T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S8933-IQC50-A2T requirements.
6.How does Aetrix verify that LM3S8933-IQC50-A2T is sourced from the original manufacturer or authorized distributors?
All LM3S8933-IQC50-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-IQC50-A2T meets industry standards.
7.What is the process for return or replacement of LM3S8933-IQC50-A2T?
All LM3S8933-IQC50-A2T units undergo pre-shipment inspection (PSI). If there is an issue with LM3S8933-IQC50-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-IQC50-A2T part is unused and in its original packaging.
Return procedure for LM3S8933-IQC50-A2T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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