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Texas Instruments LM3S1637-IQC50-A2T
- Part No.:
- LM3S1637-IQC50-A2T
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
LM3S1637-IQC50-A2T.pdf
- Description:
- IC MCU 32BIT 128KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,160
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Product details
Overview
LM3S1637-IQC50-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 -40°C to +85°C industrial temperature range, and targets motor control and embedded sensing systems requiring low-power operation with real-time responsiveness.
For engineers reviewing the LM3S1637-IQC50-A2T datasheet, LM3S1637-IQC50-A2T pinout, LM3S1637-IQC50-A2T application, or LM3S1637-IQC50-A2T equivalent, key selection criteria include hibernation-capable power management, on-chip RTC, analog comparator support, and QFP-100 package compatibility for space-constrained industrial control designs.
Technical Context
The LM3S1637-IQC50-A2T 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 of hibernate memory, enabling sub-µA sleep current while retaining timekeeping and wake-up capability.
Peripherals include an 8-channel 12-bit ADC with hardware averaging, two UARTs (one with IrDA/SIR), one SSI, one I²C, six general-purpose timers (including PWM-capable), and four analog comparators with internal reference. All are clocked from a programmable PLL-based system clock up to 50 MHz.
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, 2 KB hibernate RAM |
| ADC | 12-bit SAR ADC with 8 input channels, configurable sample sequencers, hardware averaging up to 64 samples |
| Timers | Six 16/32-bit GPTMs: three 32-bit or six 16-bit; supports one-shot, periodic, RTC, PWM, edge-count, and edge-timing modes |
| Communication | Two UARTs (one with IrDA/SIR), one SSI, one I²C, JTAG debug interface |
| Power Management | Hibernation module with RTC, battery backup support, wake-on-comparator, wake-on-external-pin, <1 µA hibernate current |
| Operating Range | -40°C to +85°C ambient, 3.0 V to 3.6 V supply voltage |
| Package | 100-pin LQFP (14 mm × 14 mm), 0.5 mm pitch, RoHS-compliant |
Pinout & Package
LM3S1637-IQC50-A2T is housed in a 100-pin LQFP (Low-Profile Quad Flat Package) with exposed thermal pad, designed for surface-mount assembly and thermal dissipation in industrial environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDC | Power Supply Inputs | Digital core (VDDC), analog (VDDA), and I/O (VDD) rails - require separate decoupling per datasheet layout guidelines |
| GND, GNDA, GNDC | Ground Returns | Analog ground (GNDA), core ground (GNDC), and digital I/O ground (GND) - must be connected with low-inductance paths |
| OSC0, OSC1 | Crystal Oscillator Inputs | Supports external 4–25 MHz crystal or ceramic resonator for main system clock generation |
| RTCCLK | Real-Time Clock Input | Accepts 32.768 kHz watch crystal for hibernation-mode RTC independent of main oscillator |
| PD0–PD7, PE0–PE7, PF0–PF4, etc. | GPIO Pins | Configurable as digital I/O, peripheral functions (UART, SSI, I²C, PWM), or analog inputs (ADC/comp) |
| JTAG_TCK, TMS, TDI, TDO, nTRST | JTAG Debug Interface | Standard 5-pin JTAG for programming, boundary scan, and real-time debugging via SWD-compatible tools |
Key Features
| Feature | Design Value |
|---|---|
| Hibernation Module | Enables <1 µA deep-sleep mode with battery-backed RTC, 2 KB hibernate RAM, and wake-on-external-interrupt or comparator event |
| Integrated Analog Subsystem | 8-channel 12-bit ADC with hardware averaging, four analog comparators with programmable internal reference, and temperature sensor |
| Motor Control Timers | Six general-purpose timers including PWM-capable channels with dead-band generation and fault protection inputs |
| Robust Communication Suite | Dual UARTs (one with IrDA/SIR), I²C master/slave, SSI master/slave - all with FIFOs and interrupt-driven operation |
| ARM Cortex-M3 Core | Single-cycle multiply, hardware divide, nested vectored interrupt controller (NVIC), and full debug support via JTAG/SWD |
| Industrial Temperature Grade | Qualified for -40°C to +85°C operation with 3.0–3.6 V supply - suitable for uncontrolled environmental deployments |
Applications
| Industrial Motor Control | Smart Sensor Node |
|---|---|
Use Scenario: Closed-loop BLDC motor drive in HVAC blowers or pump controllers where duty cycle varies dynamically and thermal constraints limit active runtime. IC Role / Device Role / Timing Role: Main system controller executing FOC algorithms, managing PWM outputs, reading current/voltage feedback via ADC, and monitoring thermal sensors. Use Value: Integrated hibernation allows firmware-initiated low-power idle states between motion cycles, reducing average power by >90% without losing position or timing context. | Use Scenario: Battery-powered environmental monitor measuring temperature, humidity, and air quality over multi-day intervals with periodic wireless upload. IC Role / Device Role / Timing Role: Central data acquisition unit sampling analog sensors, processing readings, storing logs in SRAM, and waking radios only during scheduled transmission windows. Use Value: Sub-µA hibernate current with RTC wake-up enables >1-year battery life using standard CR123A cells, while on-chip comparators trigger immediate wake on threshold breach. |
| Programmable Logic Controller (PLC) I/O Module | Medical Diagnostic Handheld |
Use Scenario: DIN-rail mounted I/O expansion module interfacing with 24 V DC field devices, providing isolation, diagnostics, and local logic execution. IC Role / Device Role / Timing Role: Real-time I/O manager handling discrete input debouncing, analog input scaling, and output PWM modulation - synchronized to PLC scan cycle. Use Value: Dual UARTs enable simultaneous Modbus RTU communication with host PLC and local configuration port; hibernation preserves state during brown-out events. | Use Scenario: Portable ECG or pulse oximeter requiring clinical-grade signal fidelity, low-noise analog front-end, and regulatory-compliant power management. IC Role / Device Role / Timing Role: Signal processor acquiring conditioned biopotential signals via 12-bit ADC, performing baseline correction, and triggering alerts on arrhythmia patterns. Use Value: On-chip analog comparator with internal reference provides fast, deterministic over-voltage detection on electrode inputs - critical for patient safety compliance. |
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 package and core; adds Ethernet MAC, USB device, and larger 512 KB flash - no hibernation module | Better suited for networked gateway applications; lacks RTC/battery-backup capability required for long-term autonomous operation | Select LM3S1968-IQC50-A2T only when Ethernet or USB connectivity outweighs hibernation needs |
| TM4C123GH6PM | Successor family with same pinout (100-pin LQFP), 80 MHz Cortex-M4F, 256 KB flash, 32 KB SRAM, but no dedicated hibernation module - uses deep-sleep instead | Higher performance and FPU support; requires external RTC or software-managed timekeeping during deep-sleep | Choose TM4C123GH6PM for new designs needing floating-point math or higher throughput; retain LM3S1637-IQC50-A2T for legacy hibernation-critical deployments |
Compared with LM3S1968-IQC50-A2T and TM4C123GH6PM, the LM3S1637-IQC50-A2T uniquely delivers integrated hibernation with battery-backed RTC and sub-µA retention - making it irreplaceable in applications requiring guaranteed timekeeping and state preservation during extended off-line periods without external components.
Availability
LM3S1637-IQC50-A2T is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, PLC I/O modules, and medical diagnostic handhelds requiring stable component supply across extended production lifecycles.
Supply support for LM3S1637-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, delivering analog and embedded processing solutions for industrial, automotive, and consumer markets since 1930.
The Stellaris LM3S series was designed specifically for cost-sensitive, low-power embedded control applications requiring real-time responsiveness, integrated analog peripherals, and robust industrial temperature operation - with the LM3S1637-IQC50-A2T optimized for hibernation-aware systems.
FAQ
What is the maximum operating frequency of the LM3S1637-IQC50-A2T?
The LM3S1637-IQC50-A2T operates at a maximum system clock frequency of 50 MHz, achieved via its internal PLL configured from an external crystal or oscillator source. This frequency applies across the full industrial temperature range (-40°C to +85°C) and 3.0–3.6 V supply, as validated in TI's production test flow. The LM3S1637-IQC50-A2T maintains deterministic interrupt latency and peripheral timing at this rate, supporting real-time motor control loops and sensor sampling deadlines.
Does the LM3S1637-IQC50-A2T support hibernation mode with battery backup?
Yes, the LM3S1637-IQC50-A2T includes a dedicated hibernation module that supports battery-backed operation with real-time clock (RTC) functionality and 2 KB of hibernate RAM. When powered from a coin-cell or supercapacitor on the VBAT pin, the LM3S1637-IQC50-A2T maintains RTC timekeeping and retains critical state data while drawing less than 1 µA. Wake-up sources include RTC match, external GPIO, or analog comparator events - all documented in Section 6 of the LM3S1637-IQC50-A2T datasheet.
What analog peripherals are integrated into the LM3S1637-IQC50-A2T?
The LM3S1637-IQC50-A2T integrates an 8-channel 12-bit successive-approximation ADC with hardware sample averaging (up to 64x), four analog comparators with programmable internal voltage reference, and an on-die temperature sensor. These peripherals share common analog supply (VDDA/GNDA) and are accessible through dedicated GPIO pins configured for analog input. The LM3S1637-IQC50-A2T's ADC supports multiple sample sequencers for autonomous conversions triggered by timers or software - essential for synchronized sensor acquisition in motor control.
Is the LM3S1637-IQC50-A2T pin-compatible with other Stellaris devices?
No, the LM3S1637-IQC50-A2T is not pin-compatible with most other Stellaris microcontrollers. While it shares the 100-pin LQFP package footprint with some variants like the LM3S1968-IQC50-A2T, signal mapping differs significantly - especially for hibernation-specific pins (RTCCLK, HIB, VBAT), analog inputs, and peripheral function assignments. The LM3S1637-IQC50-A2T datasheet confirms unique pinout requirements in Table 4-1 and Figure 4-1, and migration to alternate parts requires PCB redesign.
What debug interface does the LM3S1637-IQC50-A2T support?
The LM3S1637-IQC50-A2T supports standard 5-pin JTAG (TCK, TMS, TDI, TDO, nTRST) for full-featured programming, boundary scan, and real-time debugging. It also supports Serial Wire Debug (SWD) mode using TCK and TMS pins, enabling reduced-pin debugging with compatible tools such as TI's ICDI-based LaunchPads or third-party J-Link adapters. Debug access remains functional across all power modes except hibernation, and the LM3S1637-IQC50-A2T includes integrated flash breakpoints and watchpoints per ARM CoreSight specifications.
LM3S1637-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, QEI, SPI, SSI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O:
- 43
- 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 4x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
LM3S1637-IQC50-A2T FAQ
1.How can I place an order for LM3S1637-IQC50-A2T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S1637-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 LM3S1637-IQC50-A2T reliable?
The price and inventory of LM3S1637-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 LM3S1637-IQC50-A2T is usually 5 days.
3.What payment methods are accepted for LM3S1637-IQC50-A2T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S1637-IQC50-A2T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S1637-IQC50-A2T?
LM3S1637-IQC50-A2T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S1637-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 LM3S1637-IQC50-A2T?
For technical support, including LM3S1637-IQC50-A2T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S1637-IQC50-A2T requirements.
6.How does Aetrix verify that LM3S1637-IQC50-A2T is sourced from the original manufacturer or authorized distributors?
All LM3S1637-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 LM3S1637-IQC50-A2T meets industry standards.
7.What is the process for return or replacement of LM3S1637-IQC50-A2T?
All LM3S1637-IQC50-A2T units undergo pre-shipment inspection (PSI). If there is an issue with LM3S1637-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 LM3S1637-IQC50-A2T part is unused and in its original packaging.
Return procedure for LM3S1637-IQC50-A2T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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