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Texas Instruments LM3S1608-IQC50-A2
- Part No.:
- LM3S1608-IQC50-A2
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
LM3S1608-IQC50-A2.pdf
- Description:
- IC MCU 32BIT 128KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,343
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Product details
Overview
LM3S1608-IQC50-A2 from Texas Instruments is an ARM Cortex-M3-based microcontroller with 256 KB flash, 32 KB SRAM, integrated 12-bit ADC (8-channel), dual UARTs, I²C, SSI, and hibernation module. It operates at up to 50 MHz and supports industrial motor control and sensor interface applications.
For engineers reviewing the LM3S1608-IQC50-A2 datasheet, LM3S1608-IQC50-A2 pinout, LM3S1608-IQC50-A2 application, or LM3S1608-IQC50-A2 equivalent, key selection criteria include hibernation-capable real-time clock, on-chip analog comparator support, 50 MHz CPU frequency, and QFP-100 package compatibility for space-constrained embedded designs.
Technical Context
The LM3S1608-IQC50-A2 implements the ARM Cortex-M3 core with Thumb-2 instruction set, NVIC with 48 interrupt lines, and memory protection unit (MPU). It integrates a hibernation module with battery-backed RTC and 2 KB SRAM, enabling ultra-low-power wake-up from deep sleep states.
Peripherals include two UARTs supporting IrDA/SIR, one I²C master/slave interface, two SSI modules (SPI-compatible), eight-channel 12-bit ADC with hardware averaging, and four general-purpose timers-two 32-bit and two 16-bit-with PWM and input capture capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 32-bit RISC, executes Thumb-2 instructions at up to 50 MHz |
| Flash Memory | 256 KB on-chip flash with 128-bit wide interface and 128-byte erase sectors |
| SRAM | 32 KB general-purpose SRAM plus 2 KB hibernation-mode battery-backed RAM |
| ADC | 12-bit SAR ADC with 8 input channels, programmable sample averaging, and internal temperature sensor |
| Timers | Four GPTMs: two 32-bit and two 16-bit; support one-shot, periodic, RTC, PWM, input edge timing/count modes |
| Communication | Dual UARTs (one with IrDA/SIR), one I²C, two SSI (SPI/SSI/Microwire compatible) |
| Hibernation | Dedicated hibernation module with RTC, battery management, and wake-on-RTC-match or external GPIO |
Pinout & Package
LM3S1608-IQC50-A2 is housed in a 100-pin LQFP (14 mm × 14 mm, 0.5 mm pitch) package with exposed thermal pad. Pin assignments are defined per TI SPMS022I datasheet revision I, Table 16-1 (Pin Assignments).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDC | Power supply inputs | Separate digital (VDD), analog (VDDA), and core (VDDC) rails enable noise isolation for ADC and PLL operation |
| GND, GNDA, GNDC | Ground returns | Dedicated analog and core ground pins minimize coupling between signal domains |
| PD0–PD7, PE0–PE5, PF0–PF4, etc. | GPIO banks | Configurable as digital I/O, peripheral function pins (UART0/1, SSI0/1, I²C0), or analog inputs (ADC0–7) |
| OSC0, OSC1 | Crystal oscillator inputs | Supports 4–25 MHz crystal or external clock source for system clock generation via PLL |
| HIB, RTCCLK, HIBRTCVDD | Hibernation module interface | Enable battery-backed RTC operation and controlled entry/exit from hibernation mode |
Key Features
| Feature | Design Value |
|---|---|
| Hibernation Module | Enables sub-µA sleep current with RTC and 2 KB SRAM retention using external backup battery |
| Integrated Analog Comparator | Two independent comparators with programmable reference voltage and interrupt output for threshold detection |
| Peripheral Integration | Single-chip solution eliminates need for external UART/I²C/SSI transceivers and discrete timer ICs |
| Memory Protection Unit (MPU) | Configurable memory regions enforce privilege-level access control for secure firmware partitioning |
| Debug Interface | SWD/JTAG interface with full CoreSight debug support, including TPIU trace output |
Applications
| Industrial Motor Control | Sensor Data Acquisition |
|---|---|
Use Scenario: Closed-loop control of BLDC motors in HVAC blowers and pump drives requiring precise timing and analog feedback. IC Role / Device Role / Timing Role: Central controller executing FOC algorithms, sampling current/voltage via ADC, generating PWM via GPTM, and communicating status over UART. Use Value: Integrated hibernation enables low-power standby during idle periods without losing motor state or calibration data. | Use Scenario: Remote environmental monitoring node collecting temperature, humidity, and pressure via analog sensors. IC Role / Device Role / Timing Role: Sensor interface MCU acquiring data via 12-bit ADC, processing with on-chip comparators, and transmitting via UART or I²C to gateway. Use Value: Battery-backed RTC and hibernation SRAM allow scheduled wake-up and data logging without external nonvolatile memory. |
| Smart Energy Metering | Building Automation Controller |
Use Scenario: Residential electricity meter with tamper detection, pulse counting, and time-of-use tariff calculation. IC Role / Device Role / Timing Role: Real-time energy computation engine using GPTM for pulse input capture and RTC for billing interval tracking. Use Value: Hardware-averaged ADC measurements reduce software overhead and improve accuracy under noisy line conditions. | Use Scenario: Distributed HVAC zone controller managing damper actuation, occupancy sensing, and local display. IC Role / Device Role / Timing Role: Local decision node interfacing with analog sensors, driving relays via GPIO, and synchronizing with building BACnet/IP gateway via UART. Use Value: Dual UARTs support simultaneous local debug port and fieldbus communication without multiplexing or external level shifters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3S1968-IQC50-A2 | Same package and core; adds Ethernet MAC, USB device, and enhanced PWM with fault protection | Required for wired network connectivity or USB device-class peripherals | Select when Ethernet or USB device functionality is mandatory; otherwise LM3S1608-IQC50-A2 offers lower cost and power |
| TM4C123GH6PM | Successor family with 80 MHz Cortex-M4F, floating-point unit, higher flash (256 KB), same pinout but different peripheral register map | Needed for DSP-intensive tasks or future-proofing against TI's Stellaris EOL | Choose TM4C123GH6PM only if FPU, higher performance, or long-term availability beyond 2018 is required |
Compared with LM3S1608-IQC50-A2, LM3S1968-IQC50-A2 adds Ethernet and USB at higher BOM cost, while TM4C123GH6PM provides architectural upgrades but requires firmware migration due to register-level incompatibility and lacks hibernation module parity.
Availability
LM3S1608-IQC50-A2 is available at Aetrix Electronics and suitable for industrial motor control, sensor data acquisition, smart energy metering, and building automation controllers requiring stable component supply across extended production lifecycles.
Supply support for LM3S1608-IQC50-A2 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, specializing in analog, embedded processing, and wireless technologies with over 90 years of innovation in industrial and automotive electronics.
The Stellaris LM3S series was designed as TI's first ARM-based microcontroller family targeting cost-sensitive, real-time embedded applications where low-power operation, analog integration, and deterministic interrupt response were critical.
FAQ
What is the maximum operating frequency of the LM3S1608-IQC50-A2?
The LM3S1608-IQC50-A2 operates at a maximum system clock frequency of 50 MHz, achieved via its internal PLL that multiplies the input crystal or external clock source. This frequency is specified under industrial temperature range (–40°C to +85°C) and 3.3 V supply conditions per the SPMS022I datasheet. The LM3S1608-IQC50-A2 maintains full peripheral functionality-including ADC sampling, UART baud rate generation, and timer resolution-at this speed.
Does the LM3S1608-IQC50-A2 support hibernation mode with RTC and battery backup?
Yes, the LM3S1608-IQC50-A2 includes a dedicated hibernation module that supports RTC operation, 2 KB of battery-backed SRAM, and wake-up events from RTC match or external GPIO. When powered from VBAT, the hibernation module draws less than 1.5 µA typical, preserving timekeeping and critical data without main supply. The LM3S1608-IQC50-A2 requires external circuitry (e.g., diode-OR or load switch) to manage battery switchover, as detailed in Section 6 of the datasheet.
How many analog-to-digital converter (ADC) channels does the LM3S1608-IQC50-A2 provide?
The LM3S1608-IQC50-A2 integrates a single 12-bit successive-approximation ADC with eight configurable input channels (ADC0–ADC7), supporting both single-ended and differential sampling. It features hardware sample averaging across up to 64 conversions per sequence, programmable trigger sources (timer, processor, external), and an internal temperature sensor accessible as ADC channel 6. All specifications are validated in the SPMS022I production datasheet.
Is the LM3S1608-IQC50-A2 pin-compatible with other Stellaris LM3S devices?
No, the LM3S1608-IQC50-A2 is not universally pin-compatible across the Stellaris LM3S family. While it shares the 100-pin LQFP package with several variants (e.g., LM3S1968), pin functions differ significantly-especially for Ethernet, USB, and advanced PWM signals. The LM3S1608-IQC50-A2 has unique peripheral mapping; for example, SSI1 is assigned to PD0–PD3, whereas LM3S1968 maps SSI1 to PB4–PB7. Always verify pin assignments in the specific device datasheet.
What debug interfaces are supported by the LM3S1608-IQC50-A2?
The LM3S1608-IQC50-A2 supports both JTAG and Serial Wire Debug (SWD) interfaces via dedicated pins (TCK, TMS, TDI, TDO, nTRST, SWDIO, SWCLK). It includes full CoreSight debug infrastructure, including a Trace Port Interface Unit (TPIU) for instruction trace output. Debug access is enabled through the standard ARM debug architecture and is fully supported by TI's Code Composer Studio and third-party tools like Segger J-Link. The LM3S1608-IQC50-A2 does not require external debug probes beyond standard SWD/JTAG adapters.
LM3S1608-IQC50-A2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 100-LQFP
- Series:
- Stellaris® ARM® Cortex®-M3S 1000
- Packaging:
- Tray
- Product Status:
- Obsolete
- 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-A2 FAQ
1.How can I place an order for LM3S1608-IQC50-A2 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S1608-IQC50-A2 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-A2 reliable?
The price and inventory of LM3S1608-IQC50-A2 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-A2 is usually 5 days.
3.What payment methods are accepted for LM3S1608-IQC50-A2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S1608-IQC50-A2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S1608-IQC50-A2?
LM3S1608-IQC50-A2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S1608-IQC50-A2 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-A2?
For technical support, including LM3S1608-IQC50-A2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S1608-IQC50-A2 requirements.
6.How does Aetrix verify that LM3S1608-IQC50-A2 is sourced from the original manufacturer or authorized distributors?
All LM3S1608-IQC50-A2 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-A2 meets industry standards.
7.What is the process for return or replacement of LM3S1608-IQC50-A2?
All LM3S1608-IQC50-A2 units undergo pre-shipment inspection (PSI). If there is an issue with LM3S1608-IQC50-A2, 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-A2 part is unused and in its original packaging.
Return procedure for LM3S1608-IQC50-A2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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