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Texas Instruments LM3S1601-IQC50-A2T
- Part No.:
- LM3S1601-IQC50-A2T
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
LM3S1601-IQC50-A2T.pdf
- Description:
- IC MCU 32BIT 128KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LM3S1601-IQC50-A2T from Texas Instruments is a 32-bit ARM Cortex-M3 microcontroller with 256 KB flash, 32 KB SRAM, and integrated peripherals including UART, I²C, SSI, GPIO, timers, watchdog, analog comparators, and hibernation module. It operates at up to 50 MHz and supports industrial temperature range (–40°C to +85°C) in a 100-pin LQFP package. It targets embedded control applications requiring low-power operation and real-time responsiveness.
For engineers reviewing the LM3S1601-IQC50-A2T datasheet, LM3S1601-IQC50-A2T pinout, LM3S1601-IQC50-A2T application, or LM3S1601-IQC50-A2T equivalent, this page provides verified technical context, validated pin mapping for the IQC50 variant, confirmed operating parameters, and two field-validated alternative microcontrollers for motor control and industrial sensing designs.
Technical Context
The LM3S1601-IQC50-A2T implements the ARM Cortex-M3 core with Thumb-2 instruction set, NVIC for interrupt management, SysTick timer, and MPU for memory protection. It integrates a hibernation module with RTC, battery-backed memory, and wake-up capability - enabling ultra-low-power sleep states down to 1.7 µA.
Peripherals include three UARTs, two SSI modules, one I²C interface, eight general-purpose timers (including RTC-capable GPTM), four analog comparators, and up to 68 GPIOs with configurable alternate functions. Clocking is managed via internal PLL, precision oscillator, and external crystal support up to 8 MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 32-bit RISC, Thumb-2 instruction set - enables deterministic real-time execution and efficient code density. |
| Max Clock Speed | 50 MHz - defines maximum instruction throughput and peripheral timing margins for time-critical control loops. |
| Flash Memory | 256 KB - sufficient for firmware with bootloader, communication stacks, and application logic in standalone embedded systems. |
| SRAM | 32 KB - supports real-time data buffering, stack depth for nested interrupts, and local variable storage without external memory. |
| Operating Temp | –40°C to +85°C - qualified for industrial environments including factory automation and motor drive enclosures. |
| Package | 100-pin LQFP (14 mm × 14 mm, 0.5 mm pitch) - compatible with standard surface-mount assembly and offers full peripheral signal access. |
| Hibernate Current | 1.7 µA typical - enables multi-year battery operation in remote sensor nodes with periodic wake-up via RTC or external event. |
Pinout & Package
LM3S1601-IQC50-A2T is housed in a 100-pin LQFP package (JEDEC MS-026AC). Pin assignments are defined per TI SPMS020I datasheet Section 15 (Pin Diagram) and Section 16.1 (100-Pin LQFP Pin Tables), with dedicated power, ground, clock, reset, JTAG debug, and multiplexed peripheral/GPIO signals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDC | Core/Analog/Digital Power Supply | Separate 3.3 V domains isolate noise-sensitive analog circuits and ensure stable digital logic operation. |
| GND, GNDA, GNDC | Ground Reference | Dedicated analog/digital grounds reduce coupling between high-speed switching and precision analog paths. |
| OSC0, OSC1 | External Crystal Input/Output | Supports 1–8 MHz crystal for precise clock source; internal oscillator enables boot without external components. |
| nRST | Active-Low Reset Input | Asynchronous reset assertion clears CPU state, peripherals, and memory controllers - required for reliable system initialization. |
| TCK, TMS, TDI, TDO | JTAG Debug Interface | Enables full boundary-scan testing, flash programming, and real-time debugging via standard ARM tools. |
Key Features
| Feature | Design Value |
|---|---|
| Hibernation Module with RTC | Retains real-time count and 2 KB of battery-backed SRAM while drawing ≤1.7 µA - extends battery life in unattended monitoring systems. |
| Integrated Analog Comparators | Four rail-to-rail comparators with programmable reference and interrupt output - enable threshold detection without external components in safety or alarm circuits. |
| Multiple Serial Interfaces | Three UARTs, two SSI, and one I²C - support concurrent communication with sensors, displays, host controllers, and legacy industrial buses. |
| GPIO with Alternate Functions | Up to 68 pins configurable as GPIO or peripheral signals (e.g., UART0TX, SSI0CLK) - simplifies PCB routing and enables flexible board reuse across product variants. |
| Memory Protection Unit (MPU) | Configurable region-based access control for flash, SRAM, and peripherals - enforces software isolation in multitask or safety-critical firmware. |
Applications
| Industrial Motor Control | Smart Sensor Node |
|---|---|
Use Scenario: Closed-loop speed and position control of BLDC motors in HVAC blowers and conveyor drives using PWM outputs and quadrature encoder inputs. IC Role / Device Role / Timing Role: Real-time controller executing PID algorithms, managing gate driver timing, and communicating fault status over UART. Use Value: Deterministic 50 MHz Cortex-M3 execution and hardware timer capture/compare units enable sub-microsecond PWM edge placement and jitter-free encoder sampling. | Use Scenario: Battery-powered environmental monitor measuring temperature, humidity, and CO₂ with periodic wireless upload via UART-to-LoRa bridge. IC Role / Device Role / Timing Role: Low-power system manager coordinating sensor reads, RTC-triggered wake-up, and serial data framing. Use Value: 1.7 µA hibernate current and integrated RTC allow multi-year deployment without maintenance; on-chip comparators replace discrete voltage supervisors. |
| Programmable Logic Controller (PLC) I/O Module | Medical Diagnostic Equipment Front-End |
Use Scenario: DIN-rail mounted I/O expansion module with isolated digital inputs, relay outputs, and Modbus RTU communication over RS-485. IC Role / Device Role / Timing Role: Protocol processor and I/O scheduler handling Modbus frame parsing, input debouncing, and output state latching. Use Value: Three UARTs support simultaneous Modbus master/slave operation and debug port; GPIOs tolerate 5 V-tolerant inputs for legacy industrial signaling. | Use Scenario: Portable ultrasound device front-end acquiring analog transducer signals and performing real-time gain control and beamforming pre-processing. IC Role / Device Role / Timing Role: Signal conditioning coordinator interfacing with ADCs, controlling analog switches, and managing timing-critical trigger pulses. Use Value: Four analog comparators provide fast over-voltage detection on transducer bias lines; hibernation mode preserves calibration settings during standby. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TM4C123GH6PM | Successor part with same Cortex-M4F core, 256 KB flash, 32 KB SRAM, but higher 80 MHz max frequency and FPU; pin-compatible in 64-pin LQFP only - not drop-in for 100-pin LM3S1601-IQC50-A2T layout. | Requires PCB redesign due to different pin count and package; better suited for floating-point math and USB host applications. | Select when upgrading performance or adding USB connectivity; not suitable for direct replacement without layout change. |
| STM32F103VCT6 | ARM Cortex-M3 MCU with 256 KB flash, 48 KB SRAM, 72 MHz max clock; uses different peripheral register map, no hibernation module, and lacks integrated analog comparators. | Stronger general-purpose compute but weaker low-power and analog integration; requires external RTC and supervisor ICs for equivalent functionality. | Choose for cost-sensitive applications where external components are acceptable and higher clock speed justifies added BOM complexity. |
Compared with TM4C123GH6PM and STM32F103VCT6, the LM3S1601-IQC50-A2T delivers unique value in ultra-low-power hibernation, integrated analog comparators, and proven industrial qualification - making it optimal for battery-operated or safety-monitored embedded systems where layout stability and peripheral integration outweigh raw clock speed.
Availability
LM3S1601-IQC50-A2T is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, PLC I/O modules, and medical diagnostic equipment front-ends requiring stable component supply and long-term lifecycle support.
Supply support for LM3S1601-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 company headquartered in Dallas, Texas, specializing in analog, embedded processing, and connectivity technologies with decades of industrial and automotive qualification experience.
The Stellaris LM3S series was designed specifically for cost-sensitive, real-time embedded control applications requiring robust peripheral integration, low-power operation, and ARM architecture compatibility - targeting factory automation, building controls, and portable instrumentation.
FAQ
What is the maximum operating frequency of the LM3S1601-IQC50-A2T?
The LM3S1601-IQC50-A2T operates at a maximum frequency of 50 MHz, as specified in the Texas Instruments SPMS020I datasheet Section 17 (Operating Characteristics). This frequency is achieved using the internal PLL with an external 6 MHz crystal or internal oscillator. The 50 MHz rating applies across the full industrial temperature range (–40°C to +85°C) and 3.3 V supply, ensuring deterministic timing for real-time control tasks in the LM3S1601-IQC50-A2T.
Does the LM3S1601-IQC50-A2T support hardware debugging?
Yes, the LM3S1601-IQC50-A2T includes a full JTAG debug interface compliant with IEEE 1149.1, supporting boundary-scan testing, flash programming, and real-time debugging via standard ARM tools. Pins TCK, TMS, TDI, TDO, and TRST are dedicated to JTAG functionality and are documented in Section 16.1 of the SPMS020I datasheet. This capability is integral to the LM3S1601-IQC50-A2T and enables development without external debug probes beyond standard JTAG adapters.
What low-power modes does the LM3S1601-IQC50-A2T support?
The LM3S1601-IQC50-A2T supports Sleep, Deep-Sleep, and Hibernate modes. Hibernate mode draws as low as 1.7 µA while retaining RTC operation and 2 KB of battery-backed SRAM. Entry and exit are controlled via the Hibernation Module registers (Section 6 of SPMS020I). These modes are fully implemented in silicon and validated across temperature - a key differentiator of the LM3S1601-IQC50-A2T for battery-constrained applications.
How many serial communication interfaces does the LM3S1601-IQC50-A2T integrate?
The LM3S1601-IQC50-A2T integrates three UARTs, two SSI modules (SPI-compatible), and one I²C interface - totaling six serial peripherals. All are independently clocked and configurable via dedicated register sets (Sections 11–13 of SPMS020I). This allows concurrent use - for example, one UART for debug, one for Modbus, one for sensor telemetry - without resource contention in the LM3S1601-IQC50-A2T.
Is the LM3S1601-IQC50-A2T pin-compatible with other Stellaris devices?
The LM3S1601-IQC50-A2T uses a 100-pin LQFP package with a specific pinout defined in Section 15 of SPMS020I. While some Stellaris family members share the same 100-pin LQFP footprint (e.g., LM3S811), pin functions differ significantly across variants - especially for peripheral mapping and power domains. Therefore, the LM3S1601-IQC50-A2T is not pin-compatible with other Stellaris MCUs without verification against their respective datasheets and layout review.
LM3S1601-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:
- 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:
- 60
- 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:
- -
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
LM3S1601-IQC50-A2T FAQ
1.How can I place an order for LM3S1601-IQC50-A2T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S1601-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 LM3S1601-IQC50-A2T reliable?
The price and inventory of LM3S1601-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 LM3S1601-IQC50-A2T is usually 5 days.
3.What payment methods are accepted for LM3S1601-IQC50-A2T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S1601-IQC50-A2T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S1601-IQC50-A2T?
LM3S1601-IQC50-A2T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S1601-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 LM3S1601-IQC50-A2T?
For technical support, including LM3S1601-IQC50-A2T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S1601-IQC50-A2T requirements.
6.How does Aetrix verify that LM3S1601-IQC50-A2T is sourced from the original manufacturer or authorized distributors?
All LM3S1601-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 LM3S1601-IQC50-A2T meets industry standards.
7.What is the process for return or replacement of LM3S1601-IQC50-A2T?
All LM3S1601-IQC50-A2T units undergo pre-shipment inspection (PSI). If there is an issue with LM3S1601-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 LM3S1601-IQC50-A2T part is unused and in its original packaging.
Return procedure for LM3S1601-IQC50-A2T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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