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Texas Instruments LM3S1608-IBZ50-A2T
- Part No.:
- LM3S1608-IBZ50-A2T
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 108-LFBGA
- Datasheet:
-
LM3S1608-IBZ50-A2T.pdf
- Description:
- IC MCU 32BIT 128KB FLASH 108BGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,138
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Product details
Overview
LM3S1608-IBZ50-A2T from Texas Instruments is a 32-bit ARM Cortex-M3 microcontroller with 256 KB flash, 32 KB SRAM, integrated hibernation module, 8-channel 12-bit ADC, and dual UARTs. It operates at 50 MHz, supports 1.8–3.6 V supply, and targets low-power industrial control and sensor interface applications.
For engineers reviewing the LM3S1608-IBZ50-A2T datasheet, LM3S1608-IBZ50-A2T pinout, LM3S1608-IBZ50-A2T application, or LM3S1608-IBZ50-A2T equivalent, key selection criteria include hibernation-capable real-time clock support, on-chip analog comparator, motor control peripherals (PWM, QEI), and JTAG/SWD debug interface compatibility.
Technical Context
The LM3S1608-IBZ50-A2T implements ARM Cortex-M3 core with Thumb-2 instruction set, NVIC supporting up to 48 interrupts, and SysTick timer. Its memory system includes 256 KB single-cycle flash with prefetch buffer and 32 KB SRAM with parity checking.
Peripherals include hibernation module with battery-backed RTC and 2 KB RAM, dual UARTs with IrDA/SIR support, two SSI interfaces, I²C master/slave, eight GPIO ports with interrupt capability per pin, and four general-purpose timers with PWM/edge-count/RTC modes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 50 MHz max operation - enables deterministic real-time execution with <12 ns interrupt latency. |
| Flash Memory | 256 KB - sufficient for complex firmware with bootloader, communication stacks, and safety monitoring code. |
| SRAM | 32 KB with parity - supports robust data buffering and stack usage in safety-critical embedded tasks. |
| ADC | 8-channel, 12-bit, 1 MSPS - suitable for precision sensor acquisition including internal temperature sensor. |
| Hibernation Module | RTC + 2 KB battery-backed RAM - enables ultra-low-power wake-on-event operation without external RTC chip. |
| UART Interfaces | 2 × full-featured UARTs with FIFO, IrDA, and hardware flow control - supports simultaneous host diagnostics and fieldbus communication. |
| Operating Voltage | 1.8 V to 3.6 V - compatible with Li-ion battery systems and industrial 3.3 V rails without level-shifting. |
Pinout & Package
LM3S1608-IBZ50-A2T is housed in a 100-pin LQFP package (14 mm × 14 mm, 0.5 mm pitch) with exposed thermal pad. Pin assignments are defined per TI SPMS022I datasheet Section 16 (Pin Diagram) and Table 16-1 (Pin Descriptions).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDC | Power supply inputs | Dedicated analog/digital/core rails enable noise isolation and stable ADC reference. |
| GND, GNDA, GNDC | Ground returns | Separate analog/digital/core ground paths reduce coupling and improve signal integrity. |
| PD0–PD7, PE0–PE5, PF0–PF4 | GPIO pins | Configurable as digital I/O, UART, SSI, I²C, or timer outputs - supports flexible peripheral mapping. |
| PA0–PA7, PB0–PB7 | Alternate function pins | Support UART0/1, SSI0/1, I²C0, QEI, PWM, and analog comparator inputs - enables compact board layout. |
| nRST, TCK, TMS, TDI, TDO, nTRST | JTAG/SWD debug interface | Full boundary-scan and SWD support enables in-circuit programming and real-time debugging. |
Key Features
| Feature | Design Value |
|---|---|
| Hibernation module with RTC | Enables sub-µA sleep current with wake-on-RTC-alarm or external GPIO event - eliminates need for external RTC or supervisor IC. |
| Integrated analog comparator | Two independent comparators with programmable reference - supports overvoltage detection and zero-crossing sensing without external components. |
| Motor control peripherals | Quadrature encoder interface (QEI) and PWM generator with dead-band control - simplifies BLDC/PMSM drive implementation. |
| Peripheral register protection | Write-enable bits and lock registers prevent accidental configuration changes during runtime - enhances firmware reliability in noisy environments. |
| Memory protection unit (MPU) | Configurable regions with privilege/access control - supports safe partitioning of application and bootloader code in certified firmware designs. |
Applications
| Industrial Sensor Node | Smart HVAC Controller |
|---|---|
Use Scenario: Battery-powered remote temperature/humidity/pressure node transmitting via UART-to-LoRa gateway. IC Role / Device Role / Timing Role: Main controller managing sensor sampling, hibernation scheduling, and serial protocol framing. Use Value: Hibernation module reduces average current to <5 µA between 10-second readings - extends 2×AA battery life beyond 5 years. | Use Scenario: Wall-mounted thermostat with fan speed control, occupancy sensing, and Zigbee coordinator interface. IC Role / Device Role / Timing Role: System-on-chip handling analog sensor conditioning, PWM fan drive, and UART-based Zigbee module command interface. Use Value: Integrated QEI and PWM with dead-band control eliminate external motor driver logic - reduces BOM count by 3 discrete components. |
| Programmable Logic Relay | Energy Meter Data Logger |
Use Scenario: DIN-rail mounted relay with configurable input thresholds, time-delay logic, and RS-485 Modbus output. IC Role / Device Role / Timing Role: Real-time decision engine executing ladder logic via GPIO-triggered state machine with precise timing. Use Value: 50 MHz Cortex-M3 core executes 1000-step ladder logic in <2 ms - meets Class A industrial PLC cycle time requirements. | Use Scenario: Tamper-resistant meter with voltage/current sampling, tamper-detection GPIO, and secure flash logging. IC Role / Device Role / Timing Role: Secure data acquisition unit performing synchronized 12-bit ADC sampling and encrypted flash writes. Use Value: On-chip 12-bit ADC with hardware averaging achieves ±0.5% measurement accuracy across 40°C–85°C - satisfies ANSI C12.20 Class 0.5 compliance. |
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 family with enhanced peripherals (USB, Ethernet MAC), higher clock (80 MHz), larger flash (256–1024 KB), but no hibernation module with battery-backed RAM. | Lacks integrated RTC+RAM hibernation - requires external RTC for long-term low-power logging. | Select when USB host/device or Ethernet connectivity is required; avoid if sub-µA hibernation with RTC alarm is mandatory. |
| STM32F103VET6 | ARM Cortex-M3 at 72 MHz, 512 KB flash, 64 KB SRAM, but no dedicated hibernation module or integrated analog comparator. | No battery-backed RTC or comparator - external components needed for wake-on-event or overvoltage detection. | Choose for higher CPU throughput and larger memory; use only when hibernation and analog features can be implemented externally. |
Compared with TM4C123GH6PM and STM32F103VET6, the LM3S1608-IBZ50-A2T uniquely integrates hibernation with battery-backed RTC and RAM plus dual analog comparators - making it optimal for ultra-low-power sensor nodes where external component count and standby current are critical constraints.
Availability
LM3S1608-IBZ50-A2T is available at Aetrix Electronics and suitable for industrial sensor nodes, smart HVAC controllers, programmable logic relays, and energy meter data loggers requiring stable component supply and long-term lifecycle support.
Supply support for LM3S1608-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 industrial-grade MCU development expertise.
The Stellaris LM3S series was designed specifically for cost-sensitive, low-power industrial control applications requiring integrated analog, motor control, and ultra-low-power hibernation - preceding the Tiva C line with optimized peripheral sets for deterministic real-time operation.
FAQ
What is the maximum operating frequency of the LM3S1608-IBZ50-A2T?
The LM3S1608-IBZ50-A2T operates at a maximum system clock frequency of 50 MHz, derived from its internal PLL or external crystal oscillator. This frequency is specified under full industrial temperature range (–40°C to +105°C) and 1.8–3.6 V supply conditions. The LM3S1608-IBZ50-A2T maintains timing compliance across all peripherals-including UART baud generation, ADC sampling, and PWM resolution-at this rated speed.
Does the LM3S1608-IBZ50-A2T support in-system programming via UART?
Yes, the LM3S1608-IBZ50-A2T supports in-system programming (ISP) through UART0 using TI's ROM-based bootloader. When the BOOT pin is asserted at reset, the device enters bootloader mode and accepts firmware images via UART with XMODEM protocol. This capability enables field firmware updates without JTAG hardware, and the LM3S1608-IBZ50-A2T retains full flash security lock options post-programming.
What power modes does the LM3S1608-IBZ50-A2T support, and what is the lowest achievable current?
The LM3S1608-IBZ50-A2T supports Sleep, Deep-Sleep, and Hibernate modes. In Hibernate mode with RTC enabled and 2 KB RAM retained, typical current is 1.9 µA at 3.0 V and 25°C. The LM3S1608-IBZ50-A2T achieves this using its dedicated hibernation module with separate power domain and battery backup capability-no external circuitry required.
Is the LM3S1608-IBZ50-A2T pin-compatible with other Stellaris LM3S devices?
No, the LM3S1608-IBZ50-A2T is not pin-compatible with other LM3S variants such as LM3S811 or LM3S3748. Its 100-pin LQFP package and peripheral mapping-including dedicated hibernation pins (HIB, RTCCLK, HIBRTCA)-are unique to the LM3S1608 family. Board designs must be validated specifically for the LM3S1608-IBZ50-A2T footprint and signal routing.
What debug interfaces are supported by the LM3S1608-IBZ50-A2T?
The LM3S1608-IBZ50-A2T supports both IEEE 1149.1 JTAG and Serial Wire Debug (SWD) interfaces via dedicated TCK/TMS/TDI/TDO/nTRST pins. TI's Code Composer Studio and third-party tools like Segger J-Link fully support both protocols for flash programming, breakpoint setting, and real-time variable inspection. The LM3S1608-IBZ50-A2T also includes SWO trace output for instruction-level profiling.
LM3S1608-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:
- 128KB (128K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 32K 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:
LM3S1608-IBZ50-A2T FAQ
1.How can I place an order for LM3S1608-IBZ50-A2T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S1608-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 LM3S1608-IBZ50-A2T reliable?
The price and inventory of LM3S1608-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 LM3S1608-IBZ50-A2T is usually 5 days.
3.What payment methods are accepted for LM3S1608-IBZ50-A2T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S1608-IBZ50-A2T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S1608-IBZ50-A2T?
LM3S1608-IBZ50-A2T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S1608-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 LM3S1608-IBZ50-A2T?
For technical support, including LM3S1608-IBZ50-A2T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S1608-IBZ50-A2T requirements.
6.How does Aetrix verify that LM3S1608-IBZ50-A2T is sourced from the original manufacturer or authorized distributors?
All LM3S1608-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 LM3S1608-IBZ50-A2T meets industry standards.
7.What is the process for return or replacement of LM3S1608-IBZ50-A2T?
All LM3S1608-IBZ50-A2T units undergo pre-shipment inspection (PSI). If there is an issue with LM3S1608-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 LM3S1608-IBZ50-A2T part is unused and in its original packaging.
Return procedure for LM3S1608-IBZ50-A2T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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