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Texas Instruments LM3S2948-IBZ50-A2T
- Part No.:
- LM3S2948-IBZ50-A2T
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 108-LFBGA
- Datasheet:
-
LM3S2948-IBZ50-A2T.pdf
- Description:
- IC MCU 32BIT 256KB FLASH 108BGA
- Quantity:
- Payment:
- Shipping:
Inventory:1,622
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Product details
Overview
LM3S2948-IBZ50-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 for ultra-low-power operation. It operates at up to 50 MHz and supports industrial motor control, embedded automation, and real-time sensor processing.
For engineers reviewing the LM3S2948-IBZ50-A2T datasheet, LM3S2948-IBZ50-A2T pinout, LM3S2948-IBZ50-A2T application, or LM3S2948-IBZ50-A2T equivalent, key selection criteria include CAN interface support, hibernation mode current (≤2 µA), 50 MHz CPU clock, dual UARTs with IrDA/SIR, and 12-channel PWM capability for motion control.
Technical Context
The LM3S2948-IBZ50-A2T implements the ARM Cortex-M3 core with NVIC, SysTick, MPU, and TPIU debug infrastructure. It integrates a dedicated hibernation module with battery-backed RTC and RAM, enabling wake-up from deep sleep on external event or timer match.
Peripherals include two UARTs (one with IrDA/SIR), two SSI interfaces, one I²C master/slave, one CAN 2.0A/B controller, eight GPIO ports with interrupt masking, four 32/16-bit GPTMs (including RTC mode), and a 12-bit 1-MSPS ADC with four sample sequencers and internal temperature sensor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 32-bit RISC, runs Thumb-2 instructions at up to 50 MHz |
| Flash Memory | 256 KB on-chip flash with 128-bit wide interface and single-cycle access at 50 MHz |
| SRAM | 64 KB on-chip SRAM, zero-wait-state operation up to 50 MHz |
| ADC | 12-bit SAR ADC, 1 MSPS sampling rate, 8-channel input multiplexer, hardware averaging |
| CAN Interface | Dedicated CAN 2.0A/B controller with 32 message objects and programmable bit timing |
| Hibernate Current | ≤2 µA typical in hibernation mode with RTC active and 2 KB RAM retained |
| Operating Voltage | 2.25 V to 3.63 V, supports single-supply operation without external regulators |
Pinout & Package
LM3S2948-IBZ50-A2T is housed in a 100-pin LQFP (14 mm × 14 mm, 0.5 mm pitch) package with exposed thermal pad. Pin functions are defined per TI SPMS060I datasheet Rev I, July 2014.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDC | Power supply inputs | Separate digital, analog, and core supplies enable noise isolation and flexible power sequencing |
| GND, GNDA, GNDC | Ground returns | Independent ground planes reduce coupling between analog, digital, and core domains |
| PD0–PD7 | GPIO Port D | Configurable as general-purpose I/O, UART0/1, SSI0/1, I²C0, or CAN0 signals |
| PH0–PH3 | GPIO Port H | Supports hibernation module control: HIBERNATE, WAKE, RTCCLK, and HIBRT |
| PA0–PA7 | GPIO Port A | Includes ADC0 inputs (AIN0–AIN7), UART0, SSI0, and PWM outputs (PWM0–PWM3) |
| PC0–PC7 | GPIO Port C | Provides CAN0 TX/RX, UART1, SSI1, I²C0, and PWM4–PWM7 signals |
Key Features
| Feature | Design Value |
|---|---|
| Hibernation Module | Enables sub-2 µA system sleep with RTC alarm, battery-backed RAM, and wake-on-external-pin or timer match |
| Dual UART with IrDA/SIR | Supports infrared communication and serial loopback diagnostics without external transceivers |
| Integrated CAN 2.0A/B Controller | 32 message objects, programmable bit timing, and automatic retransmission reduce host CPU overhead |
| Four General-Purpose Timers | Each configurable as 32-bit periodic/one-shot/RTC or dual 16-bit PWM/timer units for motor phase control |
| 12-Bit ADC with Hardware Averaging | Up to 16-sample hardware averaging improves SNR for noisy industrial sensor inputs |
Applications
| Industrial Motor Control | Building Automation System |
|---|---|
Use Scenario: Closed-loop control of BLDC motors using six-step commutation and current sensing. IC Role / Device Role / Timing Role: Real-time execution of FOC algorithms, PWM generation, ADC sampling, and CAN-based command interface. Use Value: Integrated 12-bit ADC (1 MSPS), 8-channel PWM, and CAN 2.0B enable deterministic motor control without external timing ICs or bus controllers. | Use Scenario: Central HVAC controller managing zone dampers, temperature sensors, and actuator feedback. IC Role / Device Role / Timing Role: Sensor data aggregation via ADC and GPIO, local decision logic, and CAN/I²C communication to field devices. Use Value: Hibernation mode (≤2 µA) allows battery backup during AC loss; dual UARTs support Modbus RTU and service port debugging simultaneously. |
| Energy Metering Node | Factory Floor I/O Terminal |
Use Scenario: Smart meter endpoint performing voltage/current sampling, energy calculation, and secure data logging. IC Role / Device Role / Timing Role: High-accuracy analog acquisition (12-bit ADC + hardware averaging), RTC-timestamped storage, and tamper detection. Use Value: Internal temperature sensor and calibrated ADC reference reduce BOM cost; hibernation retains RTC and 2 KB RAM during power outage. | Use Scenario: DIN-rail mounted remote I/O unit collecting discrete inputs, driving relays, and reporting status over CAN bus. IC Role / Device Role / Timing Role: Deterministic GPIO interrupt handling, CAN message scheduling, and watchdog supervision of field-side firmware. Use Value: Eight GPIO ports with individual maskable interrupts allow direct connection to 64+ discrete sensors/actuators; built-in CAN controller eliminates external transceiver dependency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3S2678-IBZ50-A2T | Same core and package but 128 KB flash, no CAN controller, reduced GPIO count (68 vs. 80) | Lacks CAN interface; unsuitable for CAN-based industrial networks | Select only if CAN is unnecessary and flash requirement ≤128 KB |
| TM4C123GH6PM | Successor family with 256 KB flash, same pinout, enhanced peripherals (USB, Ethernet MAC), higher max frequency (80 MHz) | Requires updated firmware and minor layout changes due to different power sequencing and USB routing | Preferred for new designs requiring longer lifecycle support and USB connectivity |
Compared with LM3S2948-IBZ50-A2T, LM3S2678-IBZ50-A2T reduces integration for cost-sensitive non-CAN applications, while TM4C123GH6PM offers extended feature set and TI's long-term production commitment-critical for programs beyond 2025.
Availability
LM3S2948-IBZ50-A2T is available at Aetrix Electronics and suitable for industrial motor control, building automation systems, energy metering nodes, and factory floor I/O terminals requiring stable component supply and long-term obsolescence management.
Supply support for LM3S2948-IBZ50-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 wireless technologies since 1930.
The Stellaris LM3S series was designed specifically for cost-sensitive, real-time industrial and automation applications requiring integrated CAN, hibernation, and deterministic peripheral control-prioritizing low-power operation and field-deployable reliability over multimedia features.
FAQ
What is the maximum operating frequency of the LM3S2948-IBZ50-A2T?
The LM3S2948-IBZ50-A2T operates at a maximum CPU clock frequency of 50 MHz, supported by its on-chip PLL and flash memory architecture optimized for zero-wait-state execution at that speed. This frequency is specified across the full industrial temperature range (–40°C to +85°C) and 2.25 V to 3.63 V supply voltage. The LM3S2948-IBZ50-A2T achieves deterministic real-time performance for time-critical tasks such as motor commutation and CAN message scheduling.
Does the LM3S2948-IBZ50-A2T support CAN FD or only classical CAN?
The LM3S2948-IBZ50-A2T supports only Classical CAN (CAN 2.0A/B) with fixed 11-bit standard and 29-bit extended identifiers. It does not implement CAN FD features such as flexible data-rate, larger payloads (up to 64 bytes), or CRC enhancements. Its CAN controller provides 32 message objects, programmable bit timing, and automatic retransmission-fully compliant with ISO 11898-1:2003. The LM3S2948-IBZ50-A2T remains suitable for legacy industrial networks but not for next-generation automotive or high-throughput CAN FD deployments.
What is the hibernation current specification for the LM3S2948-IBZ50-A2T?
The LM3S2948-IBZ50-A2T achieves ≤2 µA typical hibernation current when configured with RTC enabled, 2 KB of SRAM retained, and all other peripherals disabled. This value is measured at 25°C with VDD = 3.3 V and includes current drawn by the hibernation module's oscillator and retention circuitry. The LM3S2948-IBZ50-A2T supports wake-up events including RTC alarm, external pin assertion (HIBWAKE), and low-battery detection-making it suitable for battery-powered remote sensors and backup systems.
How many UART interfaces does the LM3S2948-IBZ50-A2T integrate?
The LM3S2948-IBZ50-A2T integrates two independent UART modules: UART0 and UART1. Both support full-duplex asynchronous communication, programmable baud rates, 16-byte FIFOs, modem control signals, and IrDA/SIR encoding/decoding. UART0 can be routed to multiple GPIO pins (e.g., PA0/PA1 or PF0/PF1), and UART1 supports similar flexibility on Port C. The LM3S2948-IBZ50-A2T uses these UARTs for diagnostics, Modbus RTU, and host-to-peripheral bridging without requiring external level shifters.
Is the LM3S2948-IBZ50-A2T pin-compatible with any newer TI microcontrollers?
The LM3S2948-IBZ50-A2T is not pin-compatible with newer TI microcontrollers such as the TM4C123GH6PM, despite sharing the same 100-pin LQFP package footprint. Differences in power pin allocation (e.g., additional VDDA/GNDA pins), reset behavior, and USB signal routing prevent drop-in replacement. While software migration paths exist via TI's DriverLib and StellarisWare compatibility layers, the LM3S2948-IBZ50-A2T requires PCB redesign for TM4C migration. TI recommends verifying pin mapping and power sequencing before substitution.
LM3S2948-IBZ50-A2T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 108-LFBGA
- Series:
- Stellaris® ARM® Cortex®-M3S 2000
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- 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:
- 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-IBZ50-A2T FAQ
1.How can I place an order for LM3S2948-IBZ50-A2T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S2948-IBZ50-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-IBZ50-A2T reliable?
The price and inventory of LM3S2948-IBZ50-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-IBZ50-A2T is usually 5 days.
3.What payment methods are accepted for LM3S2948-IBZ50-A2T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S2948-IBZ50-A2T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S2948-IBZ50-A2T?
LM3S2948-IBZ50-A2T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S2948-IBZ50-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-IBZ50-A2T?
For technical support, including LM3S2948-IBZ50-A2T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S2948-IBZ50-A2T requirements.
6.How does Aetrix verify that LM3S2948-IBZ50-A2T is sourced from the original manufacturer or authorized distributors?
All LM3S2948-IBZ50-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-IBZ50-A2T meets industry standards.
7.What is the process for return or replacement of LM3S2948-IBZ50-A2T?
All LM3S2948-IBZ50-A2T units undergo pre-shipment inspection (PSI). If there is an issue with LM3S2948-IBZ50-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-IBZ50-A2T part is unused and in its original packaging.
Return procedure for LM3S2948-IBZ50-A2T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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