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Texas Instruments LM3S1150-IBZ50-A2T
- Part No.:
- LM3S1150-IBZ50-A2T
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 108-LFBGA
- Datasheet:
-
LM3S1150-IBZ50-A2T.pdf
- Description:
- IC MCU 32BIT 64KB FLASH 108BGA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LM3S1150-IBZ50-A2T from Texas Instruments is a 32-bit ARM Cortex-M3 microcontroller with 256 KB flash, 32 KB SRAM, integrated hibernation module, 4× UARTs, 2× SSI, 2× I²C, 8× PWM outputs, and analog comparators - deployed in industrial motor control and embedded automation systems requiring low-power operation and real-time responsiveness.
For engineers reviewing the LM3S1150-IBZ50-A2T datasheet, LM3S1150-IBZ50-A2T pinout, LM3S1150-IBZ50-A2T application, or LM3S1150-IBZ50-A2T equivalent, key selection criteria include its 50 MHz CPU clock, hibernation mode current of 1.7 µA, 100-pin LQFP package, integrated RTC with battery-backed memory, and support for deterministic interrupt latency under 12 cycles.
Technical Context
The LM3S1150-IBZ50-A2T implements the ARMv7-M architecture with Thumb-2 instruction set, NVIC supporting up to 64 interrupts with programmable priority grouping, and tightly coupled debug infrastructure including SWD/JTAG and TPIU trace capability. It integrates a dedicated hibernation module with RTC, battery-backed RAM (2 KB), and wake-up sources including GPIO, RTC match, and external pins.
Peripherals are organized into APB buses with configurable clock gating; the PWM subsystem includes dead-band generation and fault protection inputs, while analog comparators support internal reference selection and interrupt-driven edge detection. All serial interfaces (UART/SSI/I²C) feature FIFOs and independent clock domains.
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 and hardware divide/multiply. |
| Memory | 256 KB flash + 32 KB SRAM - sufficient for standalone firmware with bootloader, communication stacks, and control algorithms. |
| Hibernation Current | 1.7 µA typical - allows multi-year battery life in remote sensor nodes with periodic wake-up via RTC or external event. |
| Package | 100-pin LQFP (14 × 14 mm, 0.5 mm pitch) - supports standard PCB assembly and thermal dissipation up to 100 mW at full load. |
| PWM Outputs | 8-channel, 16-bit resolution with dead-band insertion - suitable for three-phase motor control with complementary gate drive timing. |
| Analog Comparators | 2× rail-to-rail comparators with selectable internal reference (1.65 V or 2.5 V) - enables overvoltage/undervoltage monitoring without external components. |
| Serial Interfaces | 4× UART, 2× SSI, 2× I²C - provides concurrent connectivity to sensors, displays, host controllers, and fieldbus peripherals. |
Pinout & Package
LM3S1150-IBZ50-A2T is housed in a 100-pin LQFP package (Pb-free, RoHS-compliant) with 4× 24-pin GPIO banks (Port A–D), dedicated JTAG/SWD debug pins, and power/ground distribution optimized for noise-sensitive analog and digital domains.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDC | Power supply inputs | Digital core (VDD), analog (VDDA), and PLL/clock (VDDC) rails - require separate decoupling to minimize switching noise coupling into ADC/comparator paths. |
| GND, GNDA | Ground returns | Digital ground (GND) and analog ground (GNDA) must be connected at single point near regulator to prevent ground bounce in mixed-signal operation. |
| PD0–PD7 | GPIO Port D pins | Configurable as UART3 I/O, SSI1 signals, or general-purpose I/O - supports peripheral multiplexing without external logic. |
| PA0–PA7 | GPIO Port A pins | Support UART0, SSI0, I²C0, QEI, and PWM outputs - enables compact motor control interface with encoder feedback and commutation signals. |
| TCK, TMS, TDI, TDO, nTRST | JTAG debug interface | Standard 5-pin JTAG connection - permits full-speed debugging, flash programming, and boundary scan without requiring SWD-only toolchains. |
Key Features
| Feature | Design Value |
|---|---|
| Hibernation Module with RTC | Retains 2 KB SRAM and maintains accurate timekeeping on backup battery (VBAT), enabling ultra-low-power sleep states with sub-second wake-up latency. |
| Dual I²C Controllers | Support standard (100 kbps) and fast (400 kbps) modes with slave address masking - allows daisy-chained sensor networks and isolated bus segments. |
| Programmable Interrupt Priority Grouping | NVIC supports 3-bit group/subgroup division - enables precise latency control for time-critical motor control loops versus background communication tasks. |
| Integrated Analog Comparators | Each comparator offers selectable internal reference voltage and interrupt-on-edge capability - eliminates need for external voltage supervisors in overcurrent/overtemperature detection circuits. |
| Quadrature Encoder Interface (QEI) | Dedicated hardware for position/speed decoding from incremental encoders - offloads CPU from high-frequency pulse counting and direction tracking. |
Applications
| Industrial Motor Control | Smart Sensor Node |
|---|---|
Use Scenario: Closed-loop control of BLDC motors in HVAC blowers using space-vector PWM and encoder feedback. IC Role / Device Role / Timing Role: Real-time execution of FOC algorithm, PWM waveform generation with dead-band, and QEI-based rotor position tracking. Use Value: Deterministic 50 MHz Cortex-M3 core ensures <10 µs loop jitter; integrated hibernation enables standby mode during system idle periods. | Use Scenario: Battery-powered environmental monitor logging temperature, humidity, and air quality with wireless upload. IC Role / Device Role / Timing Role: System controller managing sensor acquisition, data processing, and low-power radio wake-up coordination. Use Value: 1.7 µA hibernation current extends battery life beyond 5 years; dual I²C interfaces connect multiple sensors without GPIO bit-banging. |
| Programmable Logic Controller (PLC) I/O Module | Medical Infusion Pump Controller |
Use Scenario: DIN-rail mounted I/O expansion module with digital input filtering, relay driving, and Modbus RTU communication. IC Role / Device Role / Timing Role: Central processor handling discrete I/O scanning, protocol stack execution, and watchdog supervision. Use Value: Four UARTs support simultaneous RS-485 (Modbus), USB-to-serial bridge, debug console, and auxiliary diagnostics port. | Use Scenario: Safety-critical infusion pump requiring precise flow rate control, alarm monitoring, and tamper-resistant firmware updates. IC Role / Device Role / Timing Role: Primary safety controller executing dose calculation, motor sequencing, and fault response within hard real-time deadlines. Use Value: Memory Protection Unit (MPU) isolates application code from drivers; analog comparators detect occlusion pressure thresholds without software polling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3S1968-IBZ50-A2T | Same core and package but with 512 KB flash, no hibernation module, and reduced analog comparator count (1 vs 2). | Lacks battery-backed RTC and low-power hibernation - unsuitable for long-term battery operation but better for larger firmware images. | Select when firmware size exceeds 256 KB and ultra-low-power sleep is not required. |
| TM4C123GH6PM | Successor family with enhanced peripherals (USB, CAN), 80 MHz CPU, 256 KB flash, and identical 100-pin LQFP footprint. | Includes USB OTG and CAN FD support - adds connectivity for host/device roles and automotive diagnostics not present in LM3S1150. | Choose for new designs needing future-proofing, higher performance, or additional interface options. |
Compared with LM3S1150-IBZ50-A2T, LM3S1968-IBZ50-A2T trades hibernation capability for double flash capacity, while TM4C123GH6PM retains pin compatibility but upgrades clock speed, adds USB/CAN, and extends lifecycle support - making it the recommended migration path for production continuity.
Availability
LM3S1150-IBZ50-A2T is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, PLC I/O modules, and medical infusion pump controllers requiring stable component supply and long-term obsolescence management.
Supply support for LM3S1150-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 leader specializing in analog, embedded processing, and connectivity technologies, with decades of experience delivering reliable, high-performance silicon for industrial, automotive, and consumer applications.
The Stellaris LM3S series was designed specifically for cost-sensitive, real-time embedded applications demanding low power, rich peripheral integration, and ARM Cortex-M3 deterministic execution - targeting motor control, sensing, and programmable logic systems.
FAQ
What is the maximum operating frequency of the LM3S1150-IBZ50-A2T?
The LM3S1150-IBZ50-A2T operates at a maximum CPU clock frequency of 50 MHz, derived from an internal PLL that accepts input from the main oscillator, precision internal oscillator, or external crystal. This frequency is fully supported across the industrial temperature range (-40°C to +85°C) and enables sub-microsecond interrupt response times critical for motor control loops. The LM3S1150-IBZ50-A2T achieves consistent timing behavior due to its tightly coupled NVIC and deterministic pipeline architecture.
Does the LM3S1150-IBZ50-A2T support in-system programming via UART?
Yes, the LM3S1150-IBZ50-A2T supports in-system programming (ISP) through UART0 using TI's ROM-based bootloader, which is factory-programmed and immutable. This allows firmware updates without JTAG hardware, provided the device boots in bootloader mode (BOOTCFG pin configured). The LM3S1150-IBZ50-A2T bootloader supports XMODEM protocol and verifies flash integrity before committing updates - essential for field-deployed industrial equipment maintenance.
What is the hibernation current specification for the LM3S1150-IBZ50-A2T?
The LM3S1150-IBZ50-A2T draws 1.7 µA typical current in hibernation mode with RTC enabled and VBAT supplied, as measured per the official Texas Instruments datasheet SPMS012I. This value assumes all non-essential clocks gated, SRAM retention enabled for 2 KB, and no active GPIO leakage. The LM3S1150-IBZ50-A2T achieves this ultra-low power state using dedicated hibernation domain circuitry isolated from the main power domain.
How many UART interfaces does the LM3S1150-IBZ50-A2T provide?
The LM3S1150-IBZ50-A2T integrates four independent UART modules (UART0–UART3), each with 16-byte transmit/receive FIFOs, programmable baud-rate generators, and support for IrDA SIR encoding. UART0 and UART1 are accessible on primary GPIO ports, while UART2 and UART3 are multiplexed onto Port C and Port D. This configuration allows the LM3S1150-IBZ50-A2T to simultaneously manage Modbus RTU, debug output, sensor telemetry, and auxiliary diagnostics without software-based bit-banging.
Is the LM3S1150-IBZ50-A2T pin-compatible with other Stellaris LM3S devices?
No, the LM3S1150-IBZ50-A2T is not universally pin-compatible across the Stellaris LM3S family; its 100-pin LQFP footprint matches only specific variants like LM3S1968-IBZ50-A2T and LM3S8962-IBZ50-A2T, but peripheral pin mappings differ significantly due to varying peripheral sets and routing constraints. While mechanical fit may be identical, signal-level compatibility requires verification against each target part's datasheet - the LM3S1150-IBZ50-A2T pinout must be validated independently for any drop-in replacement attempt.
LM3S1150-IBZ50-A2T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 108-LFBGA
- Series:
- Stellaris® ARM® Cortex®-M3S 1000
- 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:
- I2C, IrDA, Microwire, QEI, SPI, SSI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O:
- 52
- Program Memory Size:
- 64KB (64K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 16K x 8
- Voltage - Supply (Vcc/Vdd):
- 2.25V ~ 2.75V
- Data Converters:
- -
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
LM3S1150-IBZ50-A2T FAQ
1.How can I place an order for LM3S1150-IBZ50-A2T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S1150-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 LM3S1150-IBZ50-A2T reliable?
The price and inventory of LM3S1150-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 LM3S1150-IBZ50-A2T is usually 5 days.
3.What payment methods are accepted for LM3S1150-IBZ50-A2T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S1150-IBZ50-A2T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S1150-IBZ50-A2T?
LM3S1150-IBZ50-A2T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S1150-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 LM3S1150-IBZ50-A2T?
For technical support, including LM3S1150-IBZ50-A2T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S1150-IBZ50-A2T requirements.
6.How does Aetrix verify that LM3S1150-IBZ50-A2T is sourced from the original manufacturer or authorized distributors?
All LM3S1150-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 LM3S1150-IBZ50-A2T meets industry standards.
7.What is the process for return or replacement of LM3S1150-IBZ50-A2T?
All LM3S1150-IBZ50-A2T units undergo pre-shipment inspection (PSI). If there is an issue with LM3S1150-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 LM3S1150-IBZ50-A2T part is unused and in its original packaging.
Return procedure for LM3S1150-IBZ50-A2T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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