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Texas Instruments LM3S2948-IQC50-A2
- Part No.:
- LM3S2948-IQC50-A2
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
LM3S2948-IQC50-A2.pdf
- Description:
- IC MCU 32BIT 256KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,259
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Product details
Overview
LM3S2948-IQC50-A2 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 (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 real-time responsiveness and low-power operation.
For engineers reviewing the LM3S2948-IQC50-A2 datasheet, LM3S2948-IQC50-A2 pinout, LM3S2948-IQC50-A2 application, or LM3S2948-IQC50-A2 equivalent, key selection criteria include its integrated CAN interface, hibernation capability with RTC, 50 MHz CPU clock, dual UARTs with IrDA support, and QFP-100 package compatibility for space-constrained industrial PCB layouts.
Technical Context
The LM3S2948-IQC50-A2 implements the ARM Cortex-M3 core with NVIC, SysTick, and MPU, enabling deterministic interrupt handling and memory protection in safety-critical firmware. Its peripheral set includes two UARTs (one with SIR/IrDA), two SSI modules, one I²C, and a dedicated CAN 2.0B controller with 32 message objects and programmable FIFOs.
Hardware-level power management includes deep-sleep hibernation mode with wake-up via GPIO, RTC alarm, or external signal, while the analog subsystem integrates an internal temperature sensor and hardware sample averaging across four ADC sequencers - all operating from a single 3.3 V supply with industrial-grade temperature range (-40°C to +85°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 50 MHz max frequency - enables real-time deterministic execution with Thumb-2 instruction set and <12-cycle interrupt latency. |
| Memory | 256 KB flash + 64 KB SRAM - sufficient for standalone firmware with bootloader, communication stacks, and control algorithms without external memory. |
| ADC | 12-bit, 1 MSPS, 8-channel with 4 sequencers - supports simultaneous sampling of motor current/voltage and temperature in closed-loop drives. |
| CAN Interface | CAN 2.0B compliant, 32 message objects, programmable FIFO - enables robust fieldbus connectivity in industrial networks without external CAN transceiver logic. |
| Hibernation Module | RTC + battery-backed RAM + wake-on-alarm - allows sub-μA sleep current and time-stamped event logging during power-loss scenarios. |
| Package | 100-pin LQFP (14 × 14 mm, 0.5 mm pitch) - compatible with standard reflow processes and provides full peripheral pin access for industrial I/O expansion. |
| Operating Temp | -40°C to +85°C - certified for deployment in uncontrolled industrial enclosures and motor drive cabinets. |
Pinout & Package
LM3S2948-IQC50-A2 is housed in a 100-pin Low-Profile Quad Flat Package (LQFP) 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 between MCU logic, ADC, and CPU domains. |
| GND, GNDA, GNDC | Ground returns | Dedicated analog and core ground planes reduce coupling-induced measurement error in precision sensing. |
| PA0–PA7, PB0–PB7, etc. | GPIO banks A–G | Configurable as digital I/O, timer capture/compare, UART/SPI/I²C/CAN signals - supports multiplexed peripheral routing per pin. |
| CAN0RX / CAN0TX | CAN physical layer interface | Dedicated differential input/output pins for CAN bus connection - require external transceiver (e.g., SN65HVD230) for bus termination and level translation. |
| HIBRST, HIBACK | Hibernation control | Enable hardware reset assertion and acknowledge signaling during hibernate entry/exit - critical for fail-safe power-down sequencing. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated CAN 2.0B Controller | Reduces BOM count by eliminating external CAN protocol ICs and simplifies layout with direct MCU-to-transceiver routing. |
| Hibernation Module with RTC | Enables <1.5 μA sleep current with timekeeping and wake-on-event - essential for battery-powered remote sensors and energy meters. |
| Dual UART with IrDA Support | Allows local diagnostics via RS-232 and infrared configuration updates without additional PHY layers or connectors. |
| Hardware ADC Averaging | Performs up to 64-sample averaging in hardware - improves effective resolution to ~14 bits without CPU overhead in noisy motor control environments. |
| MPU and NVIC | Supports memory partitioning and priority-based nested interrupts - enables certified RTOS deployments (e.g., FreeRTOS, SafeRTOS) in functional-safety designs. |
Applications
| Industrial Motor Control | Building Automation Gateway |
|---|---|
Use Scenario: Closed-loop control of 3-phase BLDC motors in HVAC compressors with real-time current sensing and PWM generation. IC Role / Device Role / Timing Role: Main system controller executing FOC algorithm, managing CAN-based commissioning, and synchronizing ADC sampling with gate driver timing. Use Value: Integrated 50 MHz Cortex-M3, dual PWM-capable timers, and hardware ADC averaging eliminate need for external DSP or signal conditioning ICs. | Use Scenario: Protocol translation hub connecting BACnet MS/TP field devices to Ethernet/IP backbone in commercial HVAC systems. IC Role / Device Role / Timing Role: Dual-CAN and dual-UART interface processor with deterministic scheduling for concurrent serial protocol parsing and TCP/IP stack offload. Use Value: On-chip CAN 2.0B and UARTs with IrDA support enable direct fieldbus interfacing and wireless service port access without external bridge ICs. |
| Energy Metering Node | Programmable Logic Controller (PLC) I/O Module |
Use Scenario: DIN-rail mounted electricity meter with tamper detection, time-of-use billing, and battery-backed data retention during mains failure. IC Role / Device Role / Timing Role: Primary data acquisition and storage controller using hibernation module for RTC, battery-backed RAM, and wake-on-interrupt for pulse counting. Use Value: Sub-μA hibernate current and integrated RTC allow >10-year battery life in sealed meter enclosures without external timekeeping ICs. | Use Scenario: Modular digital input/output expansion unit for compact PLCs handling discrete sensor/actuator signals in factory automation. IC Role / Device Role / Timing Role: Peripheral interface concentrator with configurable GPIO banks, watchdog supervision, and CAN-based backplane communication. Use Value: 100-pin LQFP provides 64+ GPIOs with programmable slew rate and pull-up/down - supports mixed-voltage I/O (3.3 V logic with 24 V sensing) via external level shifters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3S2678-IQC50-A2 | Same Cortex-M3 core and package, but 128 KB flash, no CAN, reduced ADC channels (4 vs 8), no hibernation module. | Lacks CAN and hibernation - unsuitable for fieldbus-connected or battery-backed applications. | Select only if CAN and RTC functionality are unnecessary and cost reduction is prioritized over feature scalability. |
| TM4C123GH6PM | Successor device with same footprint, 256 KB flash, 32 KB SRAM, CAN, hibernation, but higher 80 MHz clock and enhanced peripherals (USB, Ethernet MAC). | Offers USB OTG and Ethernet support - better suited for connected edge nodes requiring local web UI or cloud upload. | Prefer TM4C123GH6PM for new designs needing future-proofing, longer product lifecycle, or added connectivity beyond CAN/UART. |
Compared with LM3S2948-IQC50-A2, LM3S2678-IQC50-A2 sacrifices CAN and hibernation for lower cost, while TM4C123GH6PM extends capabilities with USB/Ethernet and higher performance - making it the recommended upgrade path for long-term industrial deployments.
Availability
LM3S2948-IQC50-A2 is available at Aetrix Electronics and suitable for industrial motor control, building automation gateways, energy metering nodes, and PLC I/O modules requiring stable component supply and long-term obsolescence management.
Supply support for LM3S2948-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 leader specializing in analog, embedded processing, and connectivity technologies, with decades of experience in industrial and automotive-grade microcontrollers.
The Stellaris LM3S family was designed specifically for cost-sensitive, real-time embedded applications demanding integrated analog, motor control, and fieldbus interfaces - targeting industrial automation, HVAC, and smart energy infrastructure.
FAQ
What is the maximum operating frequency of the LM3S2948-IQC50-A2?
The LM3S2948-IQC50-A2 operates at a maximum CPU clock frequency of 50 MHz, as specified in the production datasheet (SPMS060I, Rev I). This frequency is achieved using the internal PLL driven from the main oscillator or external crystal, and is fully supported across the industrial temperature range (-40°C to +85°C). The LM3S2948-IQC50-A2 maintains timing compliance and flash wait-state configuration at this speed without derating.
Does the LM3S2948-IQC50-A2 include a CAN controller?
Yes, the LM3S2948-IQC50-A2 integrates a full CAN 2.0B-compliant controller with 32 message objects, programmable FIFOs, and dedicated CAN0RX/CAN0TX pins. It supports both standard and extended identifiers, automatic retransmission, and error confinement - enabling direct connection to external CAN transceivers like the SN65HVD230. This capability is confirmed in Section 15 of the official datasheet.
What package type is used for the LM3S2948-IQC50-A2?
The LM3S2948-IQC50-A2 uses a 100-pin LQFP (Low-Profile Quad Flat Package) with 14 mm × 14 mm body size and 0.5 mm lead pitch, compliant with JEDEC MS-026AC. This package includes an exposed thermal pad on the underside for improved heat dissipation and is RoHS-compliant. Pin compatibility is maintained across the LM3S2xxx IQC50 series.
Is the LM3S2948-IQC50-A2 supported by modern development tools?
The LM3S2948-IQC50-A2 is supported by legacy TI tools including Code Composer Studio v5.x and StellarisWare peripheral driver library. While newer TM4C devices use DriverLib and TivaWare, the LM3S2948-IQC50-A2 retains full toolchain compatibility through TI's archived software packages and open-source GCC-based toolchains (e.g., arm-none-eabi-gcc with lm3s.ld linker script). TI continues to host documentation and firmware examples for the LM3S2948-IQC50-A2.
What is the purpose of the hibernation module in the LM3S2948-IQC50-A2?
The hibernation module in the LM3S2948-IQC50-A2 enables ultra-low-power operation (<1.5 μA typical) with integrated real-time clock (RTC), battery-backed SRAM (up to 2 KB), and wake-on-event capability (GPIO, RTC match, external signal). It allows the LM3S2948-IQC50-A2 to maintain timekeeping and retain critical state during main power loss - essential for energy meters, remote sensors, and fail-safe industrial controllers.
LM3S2948-IQC50-A2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 100-LQFP
- Series:
- Stellaris® ARM® Cortex®-M3S 2000
- Packaging:
- Tray
- Product Status:
- Not For New Designs
- Programmable:
- 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:
- 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 8x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
LM3S2948-IQC50-A2 FAQ
1.How can I place an order for LM3S2948-IQC50-A2 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S2948-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 LM3S2948-IQC50-A2 reliable?
The price and inventory of LM3S2948-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 LM3S2948-IQC50-A2 is usually 5 days.
3.What payment methods are accepted for LM3S2948-IQC50-A2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S2948-IQC50-A2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S2948-IQC50-A2?
LM3S2948-IQC50-A2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S2948-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 LM3S2948-IQC50-A2?
For technical support, including LM3S2948-IQC50-A2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S2948-IQC50-A2 requirements.
6.How does Aetrix verify that LM3S2948-IQC50-A2 is sourced from the original manufacturer or authorized distributors?
All LM3S2948-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 LM3S2948-IQC50-A2 meets industry standards.
7.What is the process for return or replacement of LM3S2948-IQC50-A2?
All LM3S2948-IQC50-A2 units undergo pre-shipment inspection (PSI). If there is an issue with LM3S2948-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 LM3S2948-IQC50-A2 part is unused and in its original packaging.
Return procedure for LM3S2948-IQC50-A2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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