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Texas Instruments LM3S1608-IQC50-A2T
- Part No.:
- LM3S1608-IQC50-A2T
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
LM3S1608-IQC50-A2T.pdf
- Description:
- IC MCU 32BIT 128KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LM3S1608-IQC50-A2T from Texas Instruments is a 32-bit ARM Cortex-M3 microcontroller with 256 KB flash, 32 KB SRAM, integrated hibernation module, 12-bit ADC (8-channel), 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-IQC50-A2T datasheet, LM3S1608-IQC50-A2T pinout, LM3S1608-IQC50-A2T application, or LM3S1608-IQC50-A2T equivalent, key selection criteria include hibernation-capable RTC, on-chip voltage regulator, GPIO interrupt masking per pin, and UART/SSI/I²C peripheral concurrency in a 100-pin LQFP package.
Technical Context
The LM3S1608-IQC50-A2T implements the ARM Cortex-M3 core with Thumb-2 instruction set, NVIC supporting 48 configurable interrupts, and memory protection unit (MPU) for embedded safety. It integrates a hibernation module with battery-backed RTC and 2 KB SRAM, enabling sub-5 µA deep-sleep operation.
Peripherals include two UARTs (one with IrDA support), one SSI, one I²C, eight 16-bit GPTM channels, four analog comparators, and an 8-channel 12-bit ADC with hardware averaging. Clocking uses internal precision oscillator (±1%) and PLL for 50 MHz system clock.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 32-bit RISC, Thumb-2 instruction set, 50 MHz max operation |
| Memory | 256 KB on-chip flash (programmable in 1 KB sectors), 32 KB SRAM |
| ADC | 12-bit SAR ADC with 8 input channels, 1 MSPS sample rate, hardware averaging up to 64x |
| Hibernation Module | RTC with calendar support, 2 KB battery-backed SRAM, wake-up from hibernate via GPIO/RTC/external pin |
| Supply Voltage | 1.8 V to 3.6 V; internal 1.25 V LDO regulator powers core logic |
| Operating Temp | –40°C to +85°C (Industrial grade, IQC suffix) |
| Package | 100-pin LQFP (14 mm × 14 mm, 0.5 mm pitch), RoHS-compliant |
Pinout & Package
LM3S1608-IQC50-A2T is housed in a 100-pin LQFP package with exposed thermal pad. Pin functions are multiplexed across GPIO, peripherals, and system signals including JTAG debug, hibernation control, and power management pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Core Power Supply | 1.25 V regulated input to internal LDO; requires external 1.8–3.6 V source |
| VDDA | Analog Power Supply | Separate 1.8–3.6 V supply for ADC/comparators; decoupling critical for 12-bit accuracy |
| GPIO Port A–F | Configurable Digital I/O | Up to 64 GPIOs with individual interrupt enable, slew-rate control, and open-drain option |
| HIBERNATE | Hibernation Control | Active-low signal enabling deep-sleep mode; asserts internal power gating and RTC retention |
| RTCCLK | Real-Time Clock Input | Accepts external 32.768 kHz crystal or clock source for hibernation-mode RTC timing |
| TCK/TMS/TDI/TDO | JTAG Debug Interface | IEEE 1149.1-compliant boundary scan and SWD-compatible debug access |
Key Features
| Feature | Design Value |
|---|---|
| Hibernation Module with RTC | Enables <5 µA system sleep current with calendar-aware wake-up and 2 KB battery-backed SRAM retention |
| On-Chip Voltage Regulator | Integrated 1.25 V LDO eliminates need for external core regulator, reducing BOM count and layout complexity |
| Peripheral Multiplexing | Single GPIO pin supports up to 8 alternate functions (e.g., UART0TX, SSI0CLK, I²C0SCL), maximizing pin utility |
| ADC Hardware Averaging | Configurable 2x–64x oversampling and averaging reduces noise without CPU overhead or firmware intervention |
| GPIO Interrupt Masking | Each GPIO pin has independent interrupt enable/disable control, allowing selective edge-triggered wake-up from sleep |
Applications
| Industrial Sensor Node | Smart Metering Terminal |
|---|---|
Use Scenario: Battery-powered environmental sensor collecting temperature, humidity, and pressure data at 1-minute intervals. IC Role / Device Role / Timing Role: Main controller executing sensor polling, ADC conversion, hibernation scheduling, and UART-based data upload. Use Value: Sub-5 µA hibernate current extends 2-AA battery life beyond 5 years; integrated RTC enables precise time-stamped logging without external timing IC. | Use Scenario: Residential electricity meter requiring tamper detection, pulse counting, and secure local communication. IC Role / Device Role / Timing Role: System-on-chip managing metrology interface, optical UART for handheld reader, and real-time billing timestamping. Use Value: Dual UARTs allow simultaneous IR communication and RS-485 backhaul; hibernation module maintains accurate time during power outages using backup capacitor. |
| Programmable Logic Controller (PLC) I/O Module | Building Automation Controller |
Use Scenario: DIN-rail mounted I/O expansion module with digital inputs, relay outputs, and Modbus RTU over UART. IC Role / Device Role / Timing Role: Real-time I/O coordinator with deterministic GPIO response, timer-based PWM for analog output simulation, and UART protocol stack. Use Value: Eight 16-bit GPTM channels support concurrent PWM generation, input capture, and quadrature decoding-eliminating need for external timing ICs. | Use Scenario: HVAC zone controller interfacing with thermostats, dampers, and CO₂ sensors via I²C and analog inputs. IC Role / Device Role / Timing Role: Central processing unit running PID loops, managing I²C sensor reads, and driving 4–20 mA outputs via DAC emulation. Use Value: 12-bit ADC with hardware averaging delivers stable 0.5% full-scale accuracy on noisy 24 VAC building power rails without external filtering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3S1968-IQC50-A2T | Same core and package, but adds Ethernet MAC and PHY interface; 512 KB flash, 64 KB SRAM | Requires Ethernet connectivity; higher power draw in active mode (70 mA vs. 55 mA) | Select when wired LAN integration is mandatory and board space allows extra magnetics/filtering |
| TM4C123GH6PM | Successor family with enhanced peripherals (USB, CAN), 80 MHz CPU, 256 KB flash, 32 KB SRAM, same 100-pin LQFP | Not hibernation-optimized; RTC lacks battery-backed RAM; no dedicated hibernate controller | Choose for new designs needing USB/CAN or longer product lifecycle; legacy LM3S1608-IQC50-A2T remains optimal for ultra-low-power hibernate use cases |
Compared with LM3S1608-IQC50-A2T, LM3S1968-IQC50-A2T adds Ethernet at cost of higher active power and larger flash footprint, while TM4C123GH6PM offers modern peripherals but sacrifices hibernation depth and RTC retention capability-making LM3S1608-IQC50-A2T uniquely suited for long-life battery-powered systems requiring calendar-aware wake-up.
Availability
LM3S1608-IQC50-A2T is available at Aetrix Electronics and suitable for industrial sensor nodes, smart metering terminals, and PLC I/O modules requiring stable component supply, extended temperature operation, and long-term obsolescence management.
Supply support for LM3S1608-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 leader specializing in analog, embedded processing, and connectivity technologies, with decades of experience in industrial and automotive microcontrollers.
The Stellaris LM3S series was designed specifically for cost-sensitive, low-power industrial control applications requiring integrated hibernation, robust peripheral sets, and ARM Cortex-M3 performance in compact packages.
FAQ
What is the maximum operating frequency of the LM3S1608-IQC50-A2T?
The LM3S1608-IQC50-A2T operates at a maximum system clock frequency of 50 MHz, achieved using its internal PLL driven by the precision internal oscillator (±1% tolerance). This frequency is fully supported across the full industrial temperature range (–40°C to +85°C) and 1.8–3.6 V supply voltage window. The LM3S1608-IQC50-A2T maintains timing compliance without derating under these conditions.
Does the LM3S1608-IQC50-A2T support hibernation with RTC and memory retention?
Yes, the LM3S1608-IQC50-A2T integrates a dedicated hibernation module that supports RTC calendar functionality, wake-up from hibernate via GPIO/RTC/external pin, and retention of 2 KB SRAM using a backup power source. In hibernate mode, typical current consumption is below 5 µA. The LM3S1608-IQC50-A2T retains full RTC state and SRAM contents without software reinitialization upon wake-up.
What ADC capabilities does the LM3S1608-IQC50-A2T provide?
The LM3S1608-IQC50-A2T features an 8-channel, 12-bit successive-approximation ADC with up to 1 MSPS sampling rate and configurable hardware averaging (2x–64x). It supports single-ended and differential input modes, internal temperature sensor readout, and programmable sample sequencers. The LM3S1608-IQC50-A2T's ADC achieves ±1 LSB INL and DNL over temperature without calibration.
Is the LM3S1608-IQC50-A2T pin-compatible with other Stellaris devices?
No, the LM3S1608-IQC50-A2T is not pin-compatible with other Stellaris microcontrollers-even within the LM3S family-due to differences in peripheral mapping, power pin allocation, and hibernation-specific signal placement. For example, HIBERNATE and RTCCLK pins are unique to hibernation-enabled variants like the LM3S1608-IQC50-A2T and are absent or relocated in non-hibernate parts.
What debug interface does the LM3S1608-IQC50-A2T support?
The LM3S1608-IQC50-A2T supports IEEE 1149.1 JTAG debugging via TCK, TMS, TDI, and TDO pins, and is compatible with TI's ICDI and third-party SWD adapters through JTAG-to-SWD translation. It includes full NVIC-integrated debug, hardware breakpoints, and watchpoints. The LM3S1608-IQC50-A2T does not require external debug circuitry-JTAG signals are brought out directly on dedicated pins.
LM3S1608-IQC50-A2T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 100-LQFP
- Series:
- Stellaris® ARM® Cortex®-M3S 1000
- 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:
- 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-IQC50-A2T FAQ
1.How can I place an order for LM3S1608-IQC50-A2T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S1608-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 LM3S1608-IQC50-A2T reliable?
The price and inventory of LM3S1608-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 LM3S1608-IQC50-A2T is usually 5 days.
3.What payment methods are accepted for LM3S1608-IQC50-A2T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S1608-IQC50-A2T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S1608-IQC50-A2T?
LM3S1608-IQC50-A2T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S1608-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 LM3S1608-IQC50-A2T?
For technical support, including LM3S1608-IQC50-A2T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S1608-IQC50-A2T requirements.
6.How does Aetrix verify that LM3S1608-IQC50-A2T is sourced from the original manufacturer or authorized distributors?
All LM3S1608-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 LM3S1608-IQC50-A2T meets industry standards.
7.What is the process for return or replacement of LM3S1608-IQC50-A2T?
All LM3S1608-IQC50-A2T units undergo pre-shipment inspection (PSI). If there is an issue with LM3S1608-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 LM3S1608-IQC50-A2T part is unused and in its original packaging.
Return procedure for LM3S1608-IQC50-A2T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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