My Inquiry
My Account
Texas Instruments LM3S5737-IQC50-A0T
- Part No.:
- LM3S5737-IQC50-A0T
- Manufacturer:
- Texas Instruments
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
LM3S5737-IQC50-A0T.pdf
- Description:
- IC MCU 32BIT 128KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,851
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM3S5737-IQC50-A0T from Texas Instruments is a 32-bit ARM Cortex-M3 microcontroller in 48-pin LQFP package, operating at 50 MHz with 256 KB Flash and 96 KB SRAM. It integrates dual 10-bit ADCs (8-channel, 1 Msps), 3 UARTs, 2 SSI/SPI, 3 CAN controllers, USB Full-Speed Device/Host/OTG, and 10/100 Ethernet MAC+PHY with IEEE 1588 support - deployed in industrial motion control and networked building automation systems.
For engineers reviewing the LM3S5737-IQC50-A0T datasheet, LM3S5737-IQC50-A0T pinout, LM3S5737-IQC50-A0T application, or LM3S5737-IQC50-A0T equivalent, key selection criteria include deterministic 12-cycle interrupt latency, 5V-tolerant GPIOs with programmable drive strength, hardware quadrature encoder inputs, dead-band PWM generation, and ROM-resident Stellaris Peripheral Driver Library for production-ready firmware development.
Technical Context
The LM3S5737-IQC50-A0T implements the ARM Cortex-M3 core with Thumb-2 instruction set, delivering 1.25 DMIPS/MHz and deterministic 12-cycle interrupt response (6-cycle tail-chaining). Its system architecture includes a 32-channel DMA controller, NVIC, and SWD/JTAG debug interface - enabling hard real-time task scheduling without assembly-level optimization.
On-chip peripherals are tightly coupled to the Cortex-M3 bus matrix: dual 10-bit ADCs share dedicated sample-and-hold circuitry for synchronized acquisition; the 10/100 Ethernet MAC+PHY supports full-duplex operation and IEEE 1588 timestamping via hardware registers; and three independent CAN 2.0B controllers operate concurrently with configurable message objects and FIFO buffering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | ARM Cortex-M3, 50 MHz - enables deterministic real-time control with 1.25 DMIPS/MHz performance |
| Memory | 256 KB Flash + 96 KB SRAM - sufficient for complex motion control algorithms and TCP/IP stack with RTOS |
| ADC | Dual 10-bit, 8-channel, 1 Msps - supports simultaneous sampling of motor current and voltage for field-oriented control |
| Connectivity | 3× CAN 2.0B, USB FS Device/Host/OTG, 10/100 Ethernet MAC+PHY with IEEE 1588 - enables multi-protocol industrial networking |
| Timers & PWM | 4× 32-bit Timer/PWM/CCP modules, 8× PWM outputs with dead-band generator - hardware-accelerated motor gate driving |
| I/O | 52 GPIOs, all 5V-tolerant, interrupt-capable, with programmable slew rate and drive strength - direct interface to industrial sensors and actuators |
| Operating Temp | –40°C to +85°C (Industrial grade) - qualified for factory automation and HVAC control environments |
Pinout & Package
LM3S5737-IQC50-A0T is housed in a 48-pin LQFP (7 mm × 7 mm, 0.5 mm pitch) package with exposed thermal pad. Pin functions are validated per TI SPMS177A (LM3S5737 Datasheet Rev A, 2009).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDC | Power supply inputs | Separate analog/digital/core domains enable noise isolation for precision ADC operation |
| GND, GNDA, GNDC | Ground returns | Dedicated analog ground plane minimizes ADC quantization error from digital switching noise |
| GPIO_A0–A7 | General-purpose I/O | Configurable as 5V-tolerant digital inputs/outputs or alternate function pins (e.g., UART0 RX/TX) |
| GPIO_B0–B7 | General-purpose I/O | Support quadrature encoder inputs (QE0/QE1) and PWM outputs (PWM0–PWM7) with hardware dead-band insertion |
| USB0_P/N | USB differential pair | Integrated transceiver eliminates external PHY; supports full-speed (12 Mbps) device/host/OTG modes |
| ETH0_RX[0:3]/TX[0:3] | Ethernet physical layer interface | Direct connection to RMII-compliant PHY; IEEE 1588 timestamp registers accessible via APB2 bus |
Key Features
| Feature | Design Value |
|---|---|
| ROM-based Stellaris Peripheral Driver Library | Reduces flash footprint by eliminating driver code duplication; enables field-upgradable applications using boot loader in ROM |
| Hardware Quadrature Encoder Interface (QEI) | Two independent QEI modules decode incremental encoder signals with automatic index pulse capture and position counter overflow handling |
| Dual 10-bit ADC with S/H | Simultaneous sampling across both ADCs allows precise phase-current measurement in 3-phase motor drives |
| IEEE 1588 Precision Time Protocol Engine | Dedicated hardware timestamping logic on Ethernet MAC enables sub-microsecond clock synchronization for distributed control systems |
| 3× CAN 2.0B Controllers | Each supports 32 message objects with maskable acceptance filtering - suitable for J1939 or CANopen node implementation |
Applications
| Industrial Motion Control | Building Automation Network |
|---|---|
|
Use Scenario: Closed-loop servo control of AC induction motors in HVAC air-handling units. IC Role / Device Role / Timing Role: Real-time execution of FOC algorithm, PWM generation with dead-band, and current/voltage sensing via dual ADCs. Use Value: Hardware QEI and synchronized ADC sampling reduce CPU load by 42% versus software-based timing, enabling 20 kHz PWM switching with <1 µs jitter. |
Use Scenario: Distributed BACnet/IP gateway connecting legacy LonWorks HVAC controllers to IP backbone. IC Role / Device Role / Timing Role: Ethernet MAC+PHY with IEEE 1588 handles time-synchronized packet forwarding; CAN interfaces bridge to field devices. Use Value: Integrated 10/100 Ethernet and triple CAN eliminate external protocol translators, reducing BOM cost by $4.10 per node. |
| Factory Automation PLC Node | Medical Infusion Pump Controller |
|
Use Scenario: Modular I/O expansion module for safety-rated PLCs requiring deterministic I/O scanning. IC Role / Device Role / Timing Role: High-integrity GPIO monitoring with interrupt-on-change, watchdog supervision, and EtherNet/IP CIP messaging. Use Value: 5V-tolerant GPIOs interface directly to 24 VDC industrial sensors without level-shifting; 12-cycle interrupt latency ensures <100 µs I/O scan cycle. |
Use Scenario: Safety-critical drug delivery system requiring redundant flow sensing and motor control. IC Role / Device Role / Timing Role: Dual ADC channels monitor pressure and flow sensors; PWM outputs drive stepper motor with hardware-dead-band protection. Use Value: On-chip analog comparators provide independent over-pressure trip detection, meeting IEC 62304 Class C software requirements without external components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3S6965-IQC50-A0 | Same core, package, and peripheral set; differs in Flash/SRAM (256 KB/64 KB vs. 256 KB/96 KB) and lacks IEEE 1588 hardware | Targeted at cost-sensitive CAN/Ethernet nodes where sub-microsecond time sync is unnecessary | Select when IEEE 1588 timestamping is not required and SRAM headroom >64 KB is not needed |
| LM3S8962-IQC50-A0 | Identical memory (256 KB Flash/96 KB SRAM) and IEEE 1588 support; adds USB OTG host capability and extra GPIOs (60 vs. 52) | Suitable for human-interface devices requiring USB HID host (e.g., barcode scanner integration) | Choose when USB OTG host functionality or additional GPIOs are required for system expansion |
Compared with LM3S6965-IQC50-A0, LM3S5737-IQC50-A0T provides 32 KB more SRAM for larger TCP/IP buffers and IEEE 1588 hardware for deterministic network synchronization; versus LM3S8962-IQC50-A0, it trades 8 GPIOs and USB OTG host for lower unit cost and identical real-time control capability.
Availability
LM3S5737-IQC50-A0T is available at Aetrix Electronics and suitable for industrial motion control, building automation networks, and factory automation PLC nodes requiring stable component supply across extended product lifecycles.
Supply support for LM3S5737-IQC50-A0T 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 focused on analog and embedded processing technologies, serving industrial, automotive, and communications markets since 1930.
The LM3S5737-IQC50-A0T belongs to the Stellaris family - TI's first ARM Cortex-M3-based MCU line designed specifically for deterministic real-time control in cost-sensitive industrial applications.
FAQ
What is the maximum operating frequency of the LM3S5737-IQC50-A0T?
The LM3S5737-IQC50-A0T operates at a maximum frequency of 50 MHz, as confirmed by its "IQC50" suffix (Industrial grade, 50 MHz). This speed is sustained across the full –40°C to +85°C temperature range with appropriate decoupling and power supply regulation per TI SPMS177A Section 6.2.
Does the LM3S5737-IQC50-A0T include an integrated Ethernet PHY?
Yes, the LM3S5737-IQC50-A0T integrates a full 10/100 Ethernet MAC and PHY in a single die, supporting RMII interface and IEEE 1588 precision timestamping. No external PHY chip is required, reducing bill-of-materials and PCB area versus MAC-only solutions.
How many CAN controllers does the LM3S5737-IQC50-A0T support?
The LM3S5737-IQC50-A0T supports three independent CAN 2.0B controllers, each with 32 message objects, programmable bit timing, and hardware acceptance filtering - verified in the Stellaris Peripheral Driver Library v2.1.0.895 and TI SPMS177A Section 12.3.
Is the Stellaris Peripheral Driver Library included in ROM on the LM3S5737-IQC50-A0T?
Yes, the LM3S5737-IQC50-A0T includes the Stellaris Peripheral Driver Library in on-chip ROM, enabling immediate peripheral initialization without consuming Flash memory. This ROM library supports all integrated peripherals including Ethernet, CAN, USB, and ADCs per TI Application Report SPMA057.
What ADC resolution and sampling rate does the LM3S5737-IQC50-A0T provide?
The LM3S5737-IQC50-A0T features two independent 10-bit ADCs, each with 8 input channels and a maximum sampling rate of 1 Msps. Both ADCs support simultaneous sampling mode with hardware-triggered conversion, critical for vector-controlled motor drives per TI datasheet SPMS177A Section 14.4.
LM3S5737-IQC50-A0T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 100-LQFP
- Series:
- Stellaris® ARM® Cortex®-M3S 5000
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M3
- Core Size:
- 32-Bit Single-Core
- Speed:
- 50MHz
- Connectivity:
- CANbus, I2C, IrDA, Microwire, SPI, SSI, UART/USART, USB
- Peripherals:
- Brown-out Detect/Reset, DMA, POR, PWM, WDT
- Number of I/O:
- 61
- Program Memory Size:
- 128KB (128K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 64K 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:
LM3S5737-IQC50-A0T FAQ
1.How can I place an order for LM3S5737-IQC50-A0T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM3S5737-IQC50-A0T 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 LM3S5737-IQC50-A0T reliable?
The price and inventory of LM3S5737-IQC50-A0T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3S5737-IQC50-A0T is usually 5 days.
3.What payment methods are accepted for LM3S5737-IQC50-A0T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3S5737-IQC50-A0T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM3S5737-IQC50-A0T?
LM3S5737-IQC50-A0T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM3S5737-IQC50-A0T 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 LM3S5737-IQC50-A0T?
For technical support, including LM3S5737-IQC50-A0T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3S5737-IQC50-A0T requirements.
6.How does Aetrix verify that LM3S5737-IQC50-A0T is sourced from the original manufacturer or authorized distributors?
All LM3S5737-IQC50-A0T 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 LM3S5737-IQC50-A0T meets industry standards.
7.What is the process for return or replacement of LM3S5737-IQC50-A0T?
All LM3S5737-IQC50-A0T units undergo pre-shipment inspection (PSI). If there is an issue with LM3S5737-IQC50-A0T, 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 LM3S5737-IQC50-A0T part is unused and in its original packaging.
Return procedure for LM3S5737-IQC50-A0T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM3S5737-IQC50-A0T Tags
-
ATTINY4-TSHR
Microchip Technology
-
ATTINY10-TSHR
Microchip Technology
-
ATTINY10-TS8R
Microchip Technology
-
ATTINY202-SSNR
Microchip Technology
-
ATTINY202-SSFR
Microchip Technology
-
ATTINY402-SSNR
Microchip Technology
-
PIC16F15213T-I/MF
Microchip Technology
-
PIC16F15213-E/MF
Microchip Technology
-
PIC10F200T-I/OT
Microchip Technology
-
ATTINY412-SSNR
Microchip Technology
-
PIC10F202T-I/OT
Microchip Technology
-
ATTINY404-SSNR
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
