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Texas Instruments LM3S2608-EQC50-A2T
- Part No.:
- LM3S2608-EQC50-A2T
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
LM3S2608-EQC50-A2T.pdf
- Description:
- IC MCU 32BIT 128KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,942
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Product details
Overview
LM3S2608-EQC50-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 (8-channel), and dual UARTs. It operates at up to 50 MHz and supports hibernation mode with RTC and battery-backed memory for low-power industrial sensing and motor control applications.
For engineers reviewing the LM3S2608-EQC50-A2T datasheet, LM3S2608-EQC50-A2T pinout, LM3S2608-EQC50-A2T application, or LM3S2608-EQC50-A2T equivalent, key selection considerations include its integrated CAN interface, hibernation module with battery-backed RAM, 50 MHz Cortex-M3 core timing, and QFP-100 package compatibility with legacy Stellaris designs.
Technical Context
The LM3S2608-EQC50-A2T implements the ARMv7-M architecture with NVIC, SysTick, and MPU, enabling deterministic real-time interrupt handling and memory protection. Its hibernation module provides deep-sleep entry with wake-up via RTC match, external GPIO, or CAN activity - all while retaining 2 KB of battery-backed SRAM.
It integrates a dual-channel 12-bit ADC with hardware averaging and sequencer-based sampling, plus two independent UARTs supporting IrDA/SIR, one SSI, and one I²C interface - all clocked from a configurable PLL-driven system clock derived from internal RC, external crystal, or precision oscillator inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 32-bit RISC, runs at up to 50 MHz - enables deterministic real-time task scheduling and efficient C/C++ execution. |
| Flash Memory | 256 KB on-chip flash with 128-bit wide access - supports in-application programming and secure firmware updates. |
| SRAM | 64 KB general-purpose SRAM + 2 KB hibernate RAM - retains critical state during ultra-low-power hibernation. |
| ADC | 12-bit, 8-channel, 1 MSPS sampling rate with hardware averaging - suitable for precision analog sensor interfacing without external signal conditioning. |
| CAN Interface | One CAN 2.0A/B-compliant controller with 32 message objects - enables robust fieldbus communication in automotive and industrial networks. |
| Package | 100-pin LQFP (EQC), 14 mm × 14 mm, 0.5 mm pitch - compatible with standard surface-mount assembly and legacy Stellaris evaluation boards. |
| Hibernation Mode | Active current < 1.9 µA with RTC running - allows years of operation on coin-cell batteries in remote monitoring systems. |
Pinout & Package
LM3S2608-EQC50-A2T is housed in a 100-pin LQFP (Leadless Quad Flat Package) with exposed thermal pad, JEDEC MS-026AC compliant. Pinout validated per TI SPMS046I datasheet Rev I (July 2014), pages 41, 168–172, 283–293.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDC | Power supply inputs | Digital (3.3 V), analog (3.3 V), and core (1.2 V) rails - require separate decoupling to meet noise immunity specs for ADC and CAN. |
| GND, GNDA, GNDC | Ground returns | Analog, digital, and core ground planes must be partitioned and joined at single point to minimize coupling noise into sensitive peripherals. |
| PD0–PD7, PE0–PE5, PF0–PF4, etc. | GPIO banks | Configurable as inputs/outputs with slew-rate control, weak pull-up/down, and edge-triggered interrupts - support multiplexed peripheral functions including UART, SSI, I²C, and CAN TX/RX. |
| PA0–PA1, PB0–PB1 | CAN0RX / CAN0TX | Dedicated differential CAN bus interface pins - require external 120 Ω termination and isolated transceiver for bus compliance. |
| HIB, RTCCLK, HIBRST | Hibernation control | Enable deep-sleep entry, provide external RTC clock source (32.768 kHz), and reset hibernation logic - essential for battery-powered wake-on-event designs. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated CAN 2.0A/B controller | Reduces BOM count by eliminating external CAN protocol ICs and simplifies PCB layout with direct MCU-to-bus connection. |
| Hibernation module with RTC & battery-backed RAM | Enables sub-2 µA sleep current with timekeeping and state retention - critical for energy-harvesting and long-life sensor nodes. |
| 12-bit 8-channel ADC with hardware averaging | Delivers effective resolution >13 bits for noisy industrial environments without software oversampling overhead. |
| Dual UARTs with IrDA/SIR support | Allows simultaneous serial diagnostics and infrared remote interface - useful in embedded HMI and service port applications. |
| ARM Cortex-M3 with NVIC and MPU | Provides priority-based interrupt nesting, memory protection, and Thumb-2 instruction set - improves code density and real-time determinism over legacy 8/16-bit MCUs. |
Applications
| Industrial Motor Control | Automotive Body Electronics |
|---|---|
Use Scenario: Closed-loop brushless DC motor control in HVAC blowers and pump drives using PWM timers and ADC feedback. IC Role / Device Role / Timing Role: Real-time motion controller executing FOC algorithms, sampling current/voltage sensors, and generating synchronized gate drive signals. Use Value: Integrated 50 MHz Cortex-M3 core and dual 16-bit PWM timers eliminate need for external timing ICs; CAN interface enables integration into vehicle body networks. | Use Scenario: Door module managing window lift, mirror adjustment, and interior lighting with wake-on-CAN capability. IC Role / Device Role / Timing Role: Low-power system manager that remains in hibernation until CAN frame reception triggers full wake-up and peripheral activation. Use Value: Sub-2 µA hibernation current extends battery life; integrated CAN controller reduces component count and EMI risk versus discrete transceiver solutions. |
| Remote Environmental Monitoring | Programmable Logic Controller (PLC) I/O Module |
Use Scenario: Solar-powered weather station collecting temperature, humidity, and pressure data with periodic wireless upload. IC Role / Device Role / Timing Role: Sensor hub aggregating analog and digital inputs, performing local preprocessing, and managing power states via hibernation timer. Use Value: Battery-backed 2 KB RAM preserves calibration data and event logs across power cycles; RTC ensures accurate timestamping without external components. | Use Scenario: DIN-rail mounted I/O expansion module communicating with main PLC CPU over CAN bus. IC Role / Device Role / Timing Role: Fieldbus interface processor handling CAN message filtering, buffering, and GPIO state synchronization. Use Value: 32 message object FIFO and programmable acceptance filtering offload host CPU; 100-pin LQFP supports dense I/O routing for modular backplane designs. |
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, floating-point unit, and enhanced CAN features - requires minor firmware update for FPU usage. | Supports higher-performance motor control with DSP extensions and larger flash (256 KB → 512 KB), but lacks hibernation-specific battery-backed RAM. | Select when migrating to newer TI ecosystem with extended toolchain support and higher compute throughput; verify hibernation logic adaptation. |
| STM32F103VET6 | ARM Cortex-M3 at 72 MHz, 512 KB flash, 64 KB SRAM, no native CAN hibernation support, different pinout and peripheral mapping. | Requires external RTC and backup power circuitry for timekeeping during sleep; CAN implementation lacks built-in message object FIFO depth matching LM3S2608. | Select for cost-sensitive applications where CAN is secondary and hibernation duration is short; expect layout and driver-level redesign. |
Compared with TM4C123GH6PM and STM32F103VET6, the LM3S2608-EQC50-A2T offers unique hibernation-optimized CAN operation with battery-backed RAM and legacy StellarisWare software compatibility - making it irreplaceable in field-deployed systems requiring long-term unattended operation on minimal power.
Availability
LM3S2608-EQC50-A2T is available at Aetrix Electronics and suitable for industrial motor control, automotive body electronics, remote environmental monitoring, and PLC I/O modules requiring stable component supply and long-lifecycle support.
Supply support for LM3S2608-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, delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and consumer markets.
The Stellaris LM3S series was designed specifically for cost-sensitive, real-time embedded applications requiring integrated connectivity (CAN, UART, I²C), analog sensing, and ultra-low-power hibernation - targeting industrial automation and automotive subsystems before the Tiva C transition.
FAQ
What is the maximum operating frequency of the LM3S2608-EQC50-A2T?
The LM3S2608-EQC50-A2T operates at a maximum system clock frequency of 50 MHz, achieved via its internal PLL locked to an external crystal or precision oscillator. This frequency applies to both the Cortex-M3 core and peripheral bus clock domains, ensuring deterministic timing for real-time control loops and high-speed serial communication. The LM3S2608-EQC50-A2T maintains full specification compliance-including ADC accuracy and CAN bit timing-at this rated speed under industrial temperature conditions (–40°C to +105°C).
Does the LM3S2608-EQC50-A2T support hibernation with RTC and battery-backed memory?
Yes, the LM3S2608-EQC50-A2T includes a dedicated hibernation module supporting RTC operation, wake-up on alarm or external GPIO, and retention of 2 KB of SRAM powered by an external VBAT supply. The hibernation current is specified at <1.9 µA with RTC enabled, allowing multi-year operation on CR2032 coin cells. This functionality is fully implemented in silicon and documented in Section 6 of the SPMS046I datasheet. The LM3S2608-EQC50-A2T uses this feature for energy-constrained remote monitoring and automotive body control applications.
What interfaces does the LM3S2608-EQC50-A2T provide for industrial communication?
The LM3S2608-EQC50-A2T integrates one Controller Area Network (CAN 2.0A/B) controller, two UARTs (with IrDA/SIR support), one SSI (SPI-compatible), and one I²C interface - all accessible via multiplexed GPIO pins. These interfaces enable direct connection to industrial fieldbuses, sensor networks, and human-machine interfaces without external level translators or protocol bridges. The LM3S2608-EQC50-A2T's CAN module includes 32 message objects and hardware acceptance filtering, making it suitable for distributed control systems in harsh EMI environments.
Is the LM3S2608-EQC50-A2T pin-compatible with other Stellaris devices?
The LM3S2608-EQC50-A2T uses a 100-pin LQFP (EQC) package shared across multiple LM3S family members, including LM3S811, LM3S8962, and LM3S9B92 - enabling partial hardware reuse in design families. However, peripheral pin mappings differ between variants; for example, CAN0RX/TX are fixed to PA0/PA1 on LM3S2608-EQC50-A2T but may appear on alternate pins in other models. Always consult the specific device datasheet's "Signal Descriptions" section before assuming interchangeability. The LM3S2608-EQC50-A2T's pinout is defined in TI SPMS046I pages 168–172.
What development tools and software support are available for the LM3S2608-EQC50-A2T?
Texas Instruments provided full StellarisWare Peripheral Driver Library, Code Composer Studio v5.x integration, and IAR Embedded Workbench support for the LM3S2608-EQC50-A2T during its active lifecycle. Evaluation kits such as the EK-LM3S2608 included JTAG debugging, onboard USB-to-UART bridge, and preloaded demo firmware. Though TI discontinued new development support after transitioning to Tiva C, legacy StellarisWare remains publicly available and functional for maintenance of deployed LM3S2608-EQC50-A2T systems.
LM3S2608-EQC50-A2T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 100-LQFP
- Series:
- Stellaris® ARM® Cortex®-M3S 2000
- 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, I2C, IrDA, Microwire, SPI, SSI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O:
- 52
- Program Memory Size:
- 128KB (128K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 32K x 8
- Voltage - Supply (Vcc/Vdd):
- 2.25V ~ 2.75V
- Data Converters:
- A/D 8x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
LM3S2608-EQC50-A2T FAQ
1.How can I place an order for LM3S2608-EQC50-A2T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S2608-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 LM3S2608-EQC50-A2T reliable?
The price and inventory of LM3S2608-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 LM3S2608-EQC50-A2T is usually 5 days.
3.What payment methods are accepted for LM3S2608-EQC50-A2T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S2608-EQC50-A2T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S2608-EQC50-A2T?
LM3S2608-EQC50-A2T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S2608-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 LM3S2608-EQC50-A2T?
For technical support, including LM3S2608-EQC50-A2T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S2608-EQC50-A2T requirements.
6.How does Aetrix verify that LM3S2608-EQC50-A2T is sourced from the original manufacturer or authorized distributors?
All LM3S2608-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 LM3S2608-EQC50-A2T meets industry standards.
7.What is the process for return or replacement of LM3S2608-EQC50-A2T?
All LM3S2608-EQC50-A2T units undergo pre-shipment inspection (PSI). If there is an issue with LM3S2608-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 LM3S2608-EQC50-A2T part is unused and in its original packaging.
Return procedure for LM3S2608-EQC50-A2T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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