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Texas Instruments LM3S1601-IQC50-A2
- Part No.:
- LM3S1601-IQC50-A2
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
LM3S1601-IQC50-A2.pdf
- Description:
- IC MCU 32BIT 128KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LM3S1601-IQC50-A2 from Texas Instruments is a 32-bit ARM Cortex-M3 microcontroller with 256 KB flash, 32 KB SRAM, integrated hibernation module, 4 UARTs, 2 SSI, 2 I²C, and analog comparators - deployed in industrial motor control and embedded automation systems requiring low-power operation and real-time responsiveness.
For engineers reviewing the LM3S1601-IQC50-A2 datasheet, LM3S1601-IQC50-A2 pinout, LM3S1601-IQC50-A2 application, or LM3S1601-IQC50-A2 equivalent, key selection criteria include hibernation support, 50 MHz CPU clock, 100-pin LQFP package, integrated RTC, and peripheral set compatibility with StellarisWare firmware.
Technical Context
The LM3S1601-IQC50-A2 implements the ARM Cortex-M3 core with Thumb-2 instruction set, NVIC with 48 interrupt lines, and SysTick timer. It integrates a hibernation module with battery-backed RTC and 2 KB hibernate memory, enabling sub-µA sleep current and wake-on-RTC-match or external GPIO event.
Peripherals include four UARTs supporting IrDA/SIR, two SSI controllers (SPI/SSI/Microwire), two I²C masters/slaves (up to 400 kHz), eight GPIO ports with programmable slew rate and pull-up/down, and dual analog comparators with internal voltage reference - all accessible via APB bus with configurable clock gating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 32-bit RISC, runs Thumb-2 instructions at up to 50 MHz |
| Flash Memory | 256 KB on-chip flash with 128-bit wide interface and hardware erase/write protection |
| SRAM | 32 KB general-purpose SRAM, zero-wait-state access at full speed |
| Hibernate Module | Includes 2 KB battery-backed RAM, RTC, and wake-on-RTC-match or GPIO event |
| UART Interfaces | 4 UARTs with FIFOs, IrDA encoding, and automatic baud-rate detection |
| I²C Speed | Standard (100 kHz) and fast (400 kHz) modes supported per I²C controller |
| Operating Voltage | 3.0 V to 3.6 V supply range; supports brown-out reset and power monitoring |
| Temperature Range | –40°C to +85°C industrial grade operation (IQC suffix) |
Pinout & Package
LM3S1601-IQC50-A2 is housed in a 100-pin LQFP package (14 mm × 14 mm, 0.5 mm pitch) with exposed thermal pad. Pin assignments are defined for 8 GPIO ports (A–H), multiple peripheral function multiplexing, and dedicated power/ground pins including VDD, VDDA, VDDC, VSS, VSSA, VSSC, and VBAT.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDC | Power Supply Inputs | Digital core (VDD), analog (VDDA), and hibernate (VDDC) rails require independent decoupling |
| VBAT | Battery Backup Input | Connects to coin cell for RTC and hibernate RAM retention during main power loss |
| GPIO Port A–H | Configurable Digital I/O | Each port supports alternate functions (UART0–3, SSI0–1, I²C0–1, PWM, etc.) via AFSEL register |
| CLKIN/CLKOUT | External Clock Interface | Accepts external crystal (4–25 MHz) or oscillator input; CLKOUT provides system clock output |
| nRST | Active-Low Reset Input | Asynchronous reset signal with internal pull-up; triggers full chip reset and register initialization |
| JTAG TDI/TDO/TCK/TMS/nTRST | Debug Interface Signals | Supports SWD and JTAG for programming, debugging, and boundary scan (IEEE 1149.1 compliant) |
Key Features
| Feature | Design Value |
|---|---|
| Hibernate Mode Power Management | Sub-1 µA typical current draw with RTC running and 2 KB RAM retained using VBAT |
| Integrated Real-Time Clock | Hardware RTC with calendar mode, alarm match, and wake-on-event capability |
| Peripheral Multiplexing | Single pin supports up to 8 alternate functions (e.g., PA0 = UART0_U0RX / SSI0_CLK / I²C1_SCL) |
| Memory Protection Unit (MPU) | Configurable region-based memory access control for code/data isolation and fault containment |
| System Control Block (SCB) | Provides system-level features including vector table offset, fault handling, and priority grouping |
| StellarisWare Firmware Support | Fully compatible with TI's StellarisWare Peripheral Driver Library and example projects |
Applications
| Industrial Motor Control | Embedded Automation Gateway |
|---|---|
Use Scenario: Compact motor drive controller managing BLDC commutation, current sensing, and safety interlocks in factory equipment. IC Role / Device Role / Timing Role: Central MCU executing real-time control loops, interfacing with ADCs, PWM timers, and GPIO-based fault inputs. Use Value: Integrated hibernation enables rapid wake-from-sleep for emergency stop recovery; 50 MHz CPU ensures deterministic loop timing under load. | Use Scenario: Protocol translation node connecting Modbus RTU field devices to Ethernet backbone via RS-485 and UART-to-TCP bridge. IC Role / Device Role / Timing Role: Dual-role processor handling serial protocol parsing, packet buffering, and TCP/IP stack offload via external PHY. Use Value: Four UARTs allow simultaneous RS-232/RS-485 interfaces; 256 KB flash stores dual firmware images for fail-safe updates. |
| Smart Sensor Node | Low-Power Remote Monitoring |
Use Scenario: Battery-powered environmental sensor collecting temperature, humidity, and motion data for wireless transmission. IC Role / Device Role / Timing Role: System-on-chip managing sensor polling, data logging, and wake-on-interrupt scheduling. Use Value: Hibernate mode reduces average current to <2 µA between readings; internal comparators enable threshold-triggered wake without host CPU involvement. | Use Scenario: Solar-powered telemetry unit monitoring tank levels and valve status in remote water infrastructure. IC Role / Device Role / Timing Role: Primary controller coordinating solar charge management, RTC-scheduled sampling, and LoRaWAN message transmission. Use Value: VBAT-supplied hibernate RAM preserves last known state and time across multi-day outages; RTC alarm wakes MCU precisely at scheduled intervals. |
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 core and package, but adds USB 2.0 device controller and increases SRAM to 64 KB | Required where USB device connectivity (e.g., HID, CDC) or larger runtime buffer space is needed | Select LM3S1968-IQC50-A2 only if USB functionality is mandatory; otherwise LM3S1601-IQC50-A2 offers lower BOM cost and identical peripheral set for non-USB use cases |
| TM4C123GH6PM | Newer generation ARM Cortex-M4F core, 80 MHz, FPU, 256 KB flash, 32 KB SRAM, same 100-pin LQFP | Required for floating-point math, higher clock performance, or future-proofing against LM3S end-of-life | TM4C123GH6PM is not pin-compatible but shares footprint and many peripheral registers; migration requires firmware adaptation but retains hardware layout |
Compared with LM3S1968-IQC50-A2 and TM4C123GH6PM, the LM3S1601-IQC50-A2 delivers optimal cost-efficiency for fixed-function industrial controllers where USB or floating-point computation is unnecessary - retaining full hibernation, RTC, and peripheral compatibility within the Stellaris family.
Availability
LM3S1601-IQC50-A2 is available at Aetrix Electronics and suitable for industrial motor control, embedded automation gateways, smart sensor nodes, and low-power remote monitoring requiring stable component supply and long-term lifecycle support.
Supply support for LM3S1601-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 digital signal processing technologies.
The Stellaris LM3S series was designed as an early-generation ARM Cortex-M3-based microcontroller platform targeting cost-sensitive, low-power industrial and automation applications with integrated analog and communication peripherals.
FAQ
What is the maximum operating frequency of the LM3S1601-IQC50-A2?
The LM3S1601-IQC50-A2 operates at a maximum CPU clock frequency of 50 MHz, achieved via internal PLL configuration from an external crystal (4–25 MHz) or precision oscillator. This frequency is guaranteed across the full industrial temperature range (–40°C to +85°C) and 3.0–3.6 V supply, as verified in the Electrical Characteristics section of the official datasheet (SPMS020I, Rev I).
Does the LM3S1601-IQC50-A2 support hibernation mode with RTC functionality?
Yes, the LM3S1601-IQC50-A2 includes a dedicated hibernation module that supports RTC operation, 2 KB of battery-backed RAM, and wake-on-RTC-alarm or GPIO event while drawing less than 1 µA from VBAT. This feature is fully documented in Section 6 of the datasheet and requires proper connection of VBAT and backup crystal (optional).
How many UART interfaces does the LM3S1601-IQC50-A2 provide, and what advanced features do they support?
The LM3S1601-IQC50-A2 integrates four UART modules, each supporting 16-byte FIFOs, IrDA pulse shaping, automatic baud-rate detection, and modem control signals. UART0 and UART1 also support SIR (Serial Infrared) encoding per IrDA 1.4 standard, enabling direct infrared communication without external transceivers.
Is the LM3S1601-IQC50-A2 pin-compatible with other Stellaris LM3S devices in the 100-pin LQFP package?
Yes, the LM3S1601-IQC50-A2 shares identical pinout and electrical characteristics with other LM3S devices in the 100-pin LQFP package (e.g., LM3S1968, LM3S8962), enabling drop-in replacement where peripheral requirements align. Signal mapping and power pin locations are consistent across this package variant per Section 15 (Pin Diagram) and Section 16.1 of the datasheet.
What development tools and software support are available for the LM3S1601-IQC50-A2?
The LM3S1601-IQC50-A2 is supported by Texas Instruments' StellarisWare Peripheral Driver Library, Code Composer Studio v5/v6, Keil MDK-ARM, and IAR Embedded Workbench. TI-provided evaluation kits (e.g., EK-LM3S1968) and reference designs validate firmware compatibility, and all drivers are source-available under BSD license for integration into custom toolchains.
LM3S1601-IQC50-A2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 100-LQFP
- Series:
- Stellaris® ARM® Cortex®-M3S 1000
- Packaging:
- Bulk
- 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:
- 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-A2 FAQ
1.How can I place an order for LM3S1601-IQC50-A2 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S1601-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 LM3S1601-IQC50-A2 reliable?
The price and inventory of LM3S1601-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 LM3S1601-IQC50-A2 is usually 5 days.
3.What payment methods are accepted for LM3S1601-IQC50-A2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S1601-IQC50-A2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S1601-IQC50-A2?
LM3S1601-IQC50-A2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S1601-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 LM3S1601-IQC50-A2?
For technical support, including LM3S1601-IQC50-A2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S1601-IQC50-A2 requirements.
6.How does Aetrix verify that LM3S1601-IQC50-A2 is sourced from the original manufacturer or authorized distributors?
All LM3S1601-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 LM3S1601-IQC50-A2 meets industry standards.
7.What is the process for return or replacement of LM3S1601-IQC50-A2?
All LM3S1601-IQC50-A2 units undergo pre-shipment inspection (PSI). If there is an issue with LM3S1601-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 LM3S1601-IQC50-A2 part is unused and in its original packaging.
Return procedure for LM3S1601-IQC50-A2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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