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Texas Instruments LM3S1958-IBZ50-A2T
- Part No.:
- LM3S1958-IBZ50-A2T
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 108-LFBGA
- Datasheet:
-
LM3S1958-IBZ50-A2T.pdf
- Description:
- IC MCU 32BIT 256KB FLASH 108BGA
- Quantity:
- Payment:
- Shipping:
Inventory:1,181
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Product details
Overview
LM3S1958-IBZ50-A2T from Texas Instruments is a 32-bit ARM Cortex-M3 microcontroller with 256 KB flash, 64 KB SRAM, integrated hibernation module, 12-bit ADC (up to 1 MSPS), and dual UARTs + I²C + SSI interfaces. It operates at 50 MHz and supports industrial temperature range (–40°C to +85°C) in 100-pin LQFP package. Used in motor control and embedded automation systems requiring low-power operation with real-time clock and battery-backed memory.
For engineers reviewing the LM3S1958-IBZ50-A2T datasheet, LM3S1958-IBZ50-A2T pinout, LM3S1958-IBZ50-A2T application, or LM3S1958-IBZ50-A2T equivalent, key selection criteria include hibernation support, integrated RTC, analog performance (12-bit/1 MSPS ADC), peripheral mix (dual UART, I²C, SSI), and industrial-grade thermal rating.
Technical Context
The LM3S1958-IBZ50-A2T implements the ARM Cortex-M3 core with Thumb-2 instruction set, NVIC for interrupt management, and SysTick timer. It integrates a hibernation module with battery-backed RAM, RTC, and wake-up capability - enabling ultra-low-power sleep states down to 1.7 µA.
Its analog subsystem includes a 12-bit, 1-MSPS ADC with four sample sequencers and internal temperature sensor. Digital peripherals include two UARTs (one with IrDA/SIR), I²C master/slave, SSI, three 32-bit GPTMs (with PWM and RTC modes), and GPIOs with configurable alternate functions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 50 MHz max - enables deterministic real-time execution with hardware divide and single-cycle MAC. |
| Flash Memory | 256 KB - sufficient for complex firmware with bootloader, communication stacks, and application logic. |
| SRAM | 64 KB - supports large buffers for serial protocols, ADC data acquisition, and RTOS task stacks. |
| ADC Resolution & Speed | 12-bit, 1 MSPS - captures fast transients in motor current sensing or power monitoring without external oversampling. |
| Hibernation Current | 1.7 µA - allows years of battery life in remote sensors using coin-cell backup with RTC and 2 KB hibernate RAM. |
| Operating Temp | –40°C to +85°C - qualified for industrial environments including factory automation and outdoor metering. |
| Package | 100-pin LQFP (14 × 14 mm, 0.5 mm pitch) - compatible with standard reflow processes and manual inspection. |
Pinout & Package
LM3S1958-IBZ50-A2T is housed in a 100-pin LQFP package (JEDEC MS-026AC). Pinout supports full peripheral mapping including dual UARTs (TX/RX/CTS/RTS), I²C (SDA/SCL), SSI (CLK/FRM/ RX/TX), ADC inputs (AN0–AN7), GPIOs with up to 8 alternate functions per pin, and dedicated hibernation signals (HIB, RTCCLK, HIBRST).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDC | Power supply rails | VDD (digital core), VDDA (analog), VDDC (hibernation) require separate filtering; decoupling critical for ADC accuracy and hibernate retention. |
| HIB, RTCCLK, HIBRST | Hibernation control | Enable deep-sleep entry, provide external RTC clock source, and reset hibernation logic independently of main reset. |
| U0RX, U0TX, U1RX, U1TX | UART I/O | Dual asynchronous serial interfaces - U0 supports IrDA/SIR; U1 supports full modem control (RTS/CTS). |
| SSI0CLK, SSI0FSS, SSI0RX, SSI0TX | Synchronous serial interface | Full-duplex SPI-compatible interface for sensors, displays, or flash memory with programmable bit rate and frame format. |
| AN0–AN7 | ADC input channels | Eight single-ended or four differential analog inputs - mapped to GPIO pins with shared function select; support internal temperature sensor. |
Key Features
| Feature | Design Value |
|---|---|
| Hibernation Module with RTC | Retains 2 KB RAM and maintains timekeeping at 1.7 µA - eliminates need for external RTC and backup controller in battery-powered nodes. |
| 12-bit 1-MSPS ADC | Four independent sample sequencers allow concurrent triggering from timers or GPIOs - enables synchronized multi-channel sampling for motor phase current measurement. |
| Dual UART with IrDA/SIR | U0 supports infrared data transmission per IrDA 1.4 spec - enables contactless configuration and diagnostics in sealed enclosures. |
| GPIO Alternate Function Mapping | Each of 68 GPIOs supports up to 8 peripheral functions - simplifies PCB routing by allowing flexible signal assignment without additional mux ICs. |
| Integrated Memory Protection Unit (MPU) | Configurable regions enforce privilege-level access to flash/SRAM - supports robust firmware partitioning for safety-critical applications. |
Applications
| Industrial Motor Control | Smart Energy Metering |
|---|---|
Use Scenario: Closed-loop control of BLDC motors in HVAC blowers with current sensing, commutation timing, and fault detection. IC Role / Device Role / Timing Role: Real-time motor controller executing FOC algorithms, managing PWM generation via GPTMs, and sampling ADC at precise intervals. Use Value: Integrated hibernation enables rapid wake-on-event (e.g., command receipt), while 12-bit ADC resolution ensures accurate current feedback for torque regulation. | Use Scenario: Residential electricity meter with tamper detection, load profiling, and wireless backhaul via UART-to-PLC or RF bridge. IC Role / Device Role / Timing Role: System host managing metrology ADC interface, RTC-based billing intervals, and secure firmware updates over serial link. Use Value: Dual UARTs allow simultaneous local debug port and PLC modem interface; hibernation extends battery life during power outage reporting. |
| Remote Environmental Sensor Node | Programmable Logic Controller (PLC) I/O Module |
Use Scenario: Battery-powered outdoor air quality monitor logging CO₂, humidity, and temperature with periodic GSM upload. IC Role / Device Role / Timing Role: Low-power system controller acquiring sensor data via I²C/ADC, timestamping with RTC, and entering hibernation between transmissions. Use Value: 1.7 µA hibernate current enables >5-year coin-cell operation; internal temperature sensor provides calibration reference without extra components. | Use Scenario: DIN-rail mounted digital I/O expansion module with isolated inputs/outputs, Modbus RTU over RS-485, and watchdog supervision. IC Role / Device Role / Timing Role: Protocol handler and I/O manager interfacing with isolation drivers, implementing Modbus slave stack on UART1 with CRC validation. Use Value: GPIO alternate function mapping allows RS-485 DE/RE control on same pins as UART; MPU prevents stack corruption during field firmware updates. |
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 Cortex-M4F core, higher clock (80 MHz), enhanced ADC (12-bit/1 MSPS + analog comparator), and USB OTG - but no hibernation module. | Lacks integrated hibernation and battery-backed RTC - requires external RTC for long-term timekeeping during power loss. | Select when floating-point math, USB connectivity, or higher CPU throughput is required; avoid if ultra-low-power hibernation is mandatory. |
| STM32F103VET6 | ARM Cortex-M3 at 72 MHz, 512 KB flash, 64 KB SRAM, 12-bit/1 MSPS ADC - no hibernation module or integrated RTC with battery backup. | No native hibernation support; RTC requires external VBAT and lacks hibernate RAM retention. | Choose for cost-sensitive designs needing larger flash and higher clock speed; add external RTC + backup capacitor if timekeeping during power loss is needed. |
Compared with TM4C123GH6PM and STM32F103VET6, the LM3S1958-IBZ50-A2T uniquely delivers integrated hibernation with RTC and 2 KB battery-backed RAM at 1.7 µA - making it irreplaceable for battery-powered applications requiring autonomous timekeeping and event-triggered wake-up without external components.
Availability
LM3S1958-IBZ50-A2T is available at Aetrix Electronics and suitable for industrial motor control, smart energy metering, remote environmental sensing, and PLC I/O modules requiring stable component supply across extended product lifecycles.
Supply support for LM3S1958-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 connectivity solutions for industrial, automotive, and consumer markets.
The Stellaris LM3S series was designed specifically for cost-sensitive, real-time embedded applications requiring high integration, low power, and industrial temperature operation - targeting motor control, building automation, and intelligent sensing.
FAQ
What is the maximum operating frequency of the LM3S1958-IBZ50-A2T?
The LM3S1958-IBZ50-A2T operates at a maximum system clock frequency of 50 MHz. This is achieved using the internal PLL with an external crystal or oscillator input. The device's ARM Cortex-M3 core executes instructions at this rate, supporting real-time tasks such as motor control loop execution and high-speed serial communication. All timing-critical peripherals-including the 1-MSPS ADC and UART baud generators-are fully specified and tested at this frequency.
Does the LM3S1958-IBZ50-A2T support hibernation mode with battery backup?
Yes, the LM3S1958-IBZ50-A2T includes a dedicated hibernation module that retains 2 KB of RAM and maintains real-time clock functionality while drawing only 1.7 µA. It supports external battery connection via VBAT pin and uses internal circuitry to switch power sources seamlessly during main supply loss. The hibernation module also provides wake-up triggers from RTC match, external pins, or low-battery detection - all documented in the LM3S1958-IBZ50-A2T datasheet sections 6.3 and 6.4.
How many ADC channels does the LM3S1958-IBZ50-A2T have, and what is their resolution?
The LM3S1958-IBZ50-A2T features an integrated 12-bit analog-to-digital converter with eight input channels (AN0–AN7), supporting both single-ended and differential sampling. It achieves up to 1 million samples per second (1 MSPS) with hardware averaging and four independent sample sequencers. These capabilities are confirmed in Section 11 of the LM3S1958-IBZ50-A2T datasheet and enable precise current/voltage monitoring in motor drives and power supplies.
What communication interfaces are integrated into the LM3S1958-IBZ50-A2T?
The LM3S1958-IBZ50-A2T integrates dual UARTs (one supporting IrDA/SIR), an I²C master/slave interface, and an SSI (SPI-compatible) port. Each interface has dedicated FIFOs, programmable baud rates or bit rates, and interrupt-driven operation. UART0 supports infrared modulation per IrDA 1.4, while UART1 includes full modem control signals. These interfaces are electrically and functionally verified per Sections 12–14 of the LM3S1958-IBZ50-A2T datasheet.
Is the LM3S1958-IBZ50-A2T pin-compatible with other Stellaris LM3S devices?
No, the LM3S1958-IBZ50-A2T is not universally pin-compatible across the Stellaris LM3S family. While it shares the 100-pin LQFP footprint with some variants (e.g., LM3S8962), signal assignments differ significantly - especially for hibernation, ADC, and peripheral function mapping. Pin compatibility must be verified per device-specific signal tables in the LM3S1958-IBZ50-A2T datasheet Section 16.1.1; direct substitution without layout review is not supported.
LM3S1958-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, 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:
LM3S1958-IBZ50-A2T FAQ
1.How can I place an order for LM3S1958-IBZ50-A2T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S1958-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 LM3S1958-IBZ50-A2T reliable?
The price and inventory of LM3S1958-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 LM3S1958-IBZ50-A2T is usually 5 days.
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We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S1958-IBZ50-A2T transactions.
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LM3S1958-IBZ50-A2T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S1958-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 LM3S1958-IBZ50-A2T?
For technical support, including LM3S1958-IBZ50-A2T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S1958-IBZ50-A2T requirements.
6.How does Aetrix verify that LM3S1958-IBZ50-A2T is sourced from the original manufacturer or authorized distributors?
All LM3S1958-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 LM3S1958-IBZ50-A2T meets industry standards.
7.What is the process for return or replacement of LM3S1958-IBZ50-A2T?
All LM3S1958-IBZ50-A2T units undergo pre-shipment inspection (PSI). If there is an issue with LM3S1958-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 LM3S1958-IBZ50-A2T part is unused and in its original packaging.
Return procedure for LM3S1958-IBZ50-A2T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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