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Texas Instruments LM3S2948-IQC50-A2T
- Part No.:
- LM3S2948-IQC50-A2T
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
LM3S2948-IQC50-A2T.pdf
- Description:
- IC MCU 32BIT 256KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,705
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Product details
Overview
LM3S2948-IQC50-A2T from Texas Instruments is a 32-bit ARM Cortex-M3 microcontroller with 256 KB flash, 64 KB SRAM, integrated CAN 2.0B controller, dual UARTs, I²C, SSI, 12-bit ADC (8-channel), and hibernation module. It operates at 50 MHz and supports industrial motor control and embedded automation systems requiring real-time communication and low-power operation.
For engineers reviewing the LM3S2948-IQC50-A2T datasheet, LM3S2948-IQC50-A2T pinout, LM3S2948-IQC50-A2T application, or LM3S2948-IQC50-A2T equivalent, key selection considerations include its 100-pin LQFP package, CAN interface timing compliance, hibernation current (2 µA), ADC sampling rate (1 MSPS), and Cortex-M3 NVIC interrupt latency (12 cycles).
Technical Context
The LM3S2948-IQC50-A2T implements the ARMv7-M architecture with Thumb-2 instruction set, supporting deterministic interrupt handling via NVIC with 32 priority levels and 8-bit subpriority grouping. Its memory system includes tightly coupled flash with prefetch buffer and SRAM with bit-band aliasing for atomic peripheral register access.
Peripherals are clock-gated and configurable via the System Control block; the hibernation module provides RTC wake-up, battery-backed RAM (2 KB), and deep-sleep entry via GPIO or RTC match. The CAN controller supports programmable bit timing, message objects (32), and FIFO mode with automatic retransmission.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 50 MHz max - enables deterministic real-time execution with <12-cycle interrupt latency |
| Flash Memory | 256 KB - sufficient for complex motor control firmware with bootloader and field-upgrade space |
| SRAM | 64 KB - supports large buffers for CAN message queues and ADC data streaming |
| ADC Resolution | 12-bit, 8-channel, 1 MSPS - meets precision analog sensing requirements in industrial feedback loops |
| CAN Interface | CAN 2.0B compliant, 32 message objects - enables robust multi-node fieldbus communication without external transceiver logic |
| Hibernate Current | 2 µA - allows battery-powered remote sensors to operate >10 years on coin cell |
| Package | 100-pin LQFP (14 × 14 mm, 0.5 mm pitch) - compatible with standard industrial PCB assembly processes |
Pinout & Package
LM3S2948-IQC50-A2T is housed in a 100-pin LQFP package with exposed thermal pad. Pin functions are defined across five GPIO ports (A–E), plus dedicated peripheral pins for CAN, UART, I²C, SSI, ADC, and hibernation control.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDC | Power supply inputs | Separate analog/digital/clock domains enable noise isolation for ADC and PLL stability |
| PA0–PA7, PB0–PB7, etc. | GPIO port pins | Configurable as digital I/O, alternate function (UART0TX, SSI0CLK), or analog input (AIN0–AIN7) |
| CAN0RX / CAN0TX | CAN physical layer interface | Dedicated differential pair pins compliant with ISO 11898-1; require external transceiver for bus connection |
| HIBERNATE | Hibernation module enable | Active-low signal controlling deep-sleep entry and wake-up source arbitration |
| RTCCLK / HIBRTCVDD | Real-time clock power and clock input | Supports external 32.768 kHz crystal or internal oscillator for timekeeping during hibernation |
Key Features
| Feature | Design Value |
|---|---|
| Integrated CAN 2.0B controller | Eliminates need for external CAN protocol IC; reduces BOM count and PCB area in automotive/industrial networks |
| Hibernation module with 2 KB battery-backed RAM | Maintains critical state and timekeeping during power loss without external backup circuitry |
| 12-bit ADC with hardware averaging | Improves effective resolution to 13–14 bits for noisy industrial sensor signals without CPU overhead |
| Nested Vectored Interrupt Controller (NVIC) | Enables prioritized, low-latency response to up to 48 interrupt sources including CAN, UART, and timer events |
| Thumb-2 instruction set with bit-band aliasing | Allows atomic read-modify-write of peripheral registers using standard load/store instructions |
Applications
| Industrial Motor Drives | Building Automation Controllers |
|---|---|
Use Scenario: Closed-loop control of 3-phase BLDC motors with position feedback and thermal monitoring. IC Role / Device Role / Timing Role: Main system controller executing FOC algorithm, managing CAN-based command interface, and sampling ADC channels for current/voltage sensing. Use Value: Integrated 12-bit ADC and CAN reduce external component count; 50 MHz Cortex-M3 delivers sufficient MIPS for real-time PWM update at 20 kHz. | Use Scenario: Central HVAC controller coordinating chillers, VAV boxes, and occupancy sensors across RS-485/CAN network. IC Role / Device Role / Timing Role: Network gateway and local decision engine with dual UARTs for Modbus RTU and CANopen communication stacks. Use Value: Dual UART + CAN + I²C enables concurrent protocol bridging; hibernation mode extends battery life in wireless sensor nodes. |
| Energy Metering Gateways | Remote Terminal Units (RTUs) |
Use Scenario: Substation-level meter aggregation unit collecting data from smart meters via CAN and transmitting over cellular/GPRS. IC Role / Device Role / Timing Role: Data concentrator with secure flash storage, RTC timestamping, and watchdog supervision for unattended operation. Use Value: 256 KB flash stores firmware + encrypted meter logs; hibernation current <2 µA ensures fail-safe logging during AC power loss. | Use Scenario: Oil & gas pipeline monitoring node measuring pressure, temperature, and flow with solar/battery hybrid power. IC Role / Device Role / Timing Role: Low-power edge controller performing local alarm logic, CAN bus diagnostics, and scheduled data upload. Use Value: Battery-backed RAM preserves last known state during brownouts; CAN message objects simplify multi-sensor polling without CPU polling overhead. |
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, higher clock (80 MHz), enhanced CAN filtering, and USB OTG - requires firmware update but no PCB change | Supports USB host/device and Ethernet MAC; better suited for connected IoT gateways than legacy CAN-only nodes | Select when upgrading legacy LM3S designs with available firmware resources and need for USB connectivity |
| STM32F103VCT6 | ARM Cortex-M3 at 72 MHz, 256 KB flash, 48 KB SRAM, CAN 2.0B - different pinout, no hibernation module, lower hibernate current not specified | Lacks integrated hibernation and battery-backed RAM; requires external RTC and backup power management | Select for cost-sensitive applications where hibernation is not required and existing STM32 toolchain is preferred |
Compared with TM4C123GH6PM and STM32F103VCT6, the LM3S2948-IQC50-A2T offers unique integration of hibernation with battery-backed RAM and CAN in a mature, production-qualified 100-pin LQFP package - ideal for long-lifecycle industrial deployments where design stability outweighs feature expansion.
Availability
LM3S2948-IQC50-A2T is available at Aetrix Electronics and suitable for industrial motor drives, building automation controllers, energy metering gateways, and remote terminal units requiring stable component supply and long-term lifecycle support.
Supply support for LM3S2948-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 digital signal processing technologies since 1930.
The Stellaris LM3S family was designed specifically for cost-sensitive, real-time industrial and automotive applications requiring integrated communication peripherals, low-power hibernation, and deterministic interrupt response - before the Tiva C series succeeded it.
FAQ
What is the maximum operating frequency of the LM3S2948-IQC50-A2T?
The LM3S2948-IQC50-A2T operates at a maximum system clock frequency of 50 MHz, derived from an internal PLL that multiplies the main oscillator or external crystal input. This frequency is specified under industrial temperature range (–40°C to +85°C) and 3.3 V supply conditions per the SPMS060I datasheet revision.
Does the LM3S2948-IQC50-A2T include a hardware hibernation module?
Yes, the LM3S2948-IQC50-A2T integrates a dedicated hibernation module with RTC, battery-backed RAM (2 KB), and ultra-low-power sleep mode consuming 2 µA typical. It supports wake-up via GPIO, RTC match, or external interrupt, and retains register state and timekeeping during power loss when VBAT is supplied.
How many CAN message objects does the LM3S2948-IQC50-A2T support?
The LM3S2948-IQC50-A2T supports 32 independent CAN message objects, each configurable as transmit or receive with programmable ID masking and acceptance filtering. These objects are managed by hardware, reducing CPU load during high-traffic CAN bus operation compared to software-polling implementations.
What ADC resolution and sampling rate does the LM3S2948-IQC50-A2T provide?
The LM3S2948-IQC50-A2T features a 12-bit successive-approximation ADC with up to 8 single-ended or 4 differential input channels and a maximum sampling rate of 1 MSPS. Hardware sample averaging improves effective resolution for industrial sensor interfaces without consuming CPU cycles.
Is the LM3S2948-IQC50-A2T pin-compatible with any newer TI microcontrollers?
Yes, the LM3S2948-IQC50-A2T is pin-compatible with the Tiva C TM4C123GH6PM in the 100-pin LQFP package. While electrical characteristics and peripheral enhancements differ, the core pin mapping for GPIO, UART, CAN, and power remains consistent - enabling drop-in replacement with firmware adaptation.
LM3S2948-IQC50-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:
- 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-A2T FAQ
1.How can I place an order for LM3S2948-IQC50-A2T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S2948-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 LM3S2948-IQC50-A2T reliable?
The price and inventory of LM3S2948-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 LM3S2948-IQC50-A2T is usually 5 days.
3.What payment methods are accepted for LM3S2948-IQC50-A2T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S2948-IQC50-A2T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S2948-IQC50-A2T?
LM3S2948-IQC50-A2T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S2948-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 LM3S2948-IQC50-A2T?
For technical support, including LM3S2948-IQC50-A2T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S2948-IQC50-A2T requirements.
6.How does Aetrix verify that LM3S2948-IQC50-A2T is sourced from the original manufacturer or authorized distributors?
All LM3S2948-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 LM3S2948-IQC50-A2T meets industry standards.
7.What is the process for return or replacement of LM3S2948-IQC50-A2T?
All LM3S2948-IQC50-A2T units undergo pre-shipment inspection (PSI). If there is an issue with LM3S2948-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 LM3S2948-IQC50-A2T part is unused and in its original packaging.
Return procedure for LM3S2948-IQC50-A2T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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