LM3S5B91-IQC80-C0 Texas Instruments Integrated Circuit (Other) In Stock
LM3S5B91-IQC80-C0 is a Texas Instruments Stellaris ARM Cortex-M3 microcontroller with integrated Ethernet MAC/PHY, USB OTG, and CAN controllers. Features 256KB flash, 96KB SRAM, and operates at up to 80MHz. Available in 144-pin LQFP package for industrial automation and networking applications.
- Manufacturer
- Texas Instruments
- Package
- Other
- Pin Count
- 100
- Lifecycle
- ACTIVE
- Datasheet
- N/A
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of LM3S5B91-IQC80-C0?
- ARM Cortex-M3 core running at up to 80MHz for high-performance embedded processing
- Integrated Ethernet MAC/PHY enabling direct network connectivity without external PHY chip
- USB OTG and dual CAN controllers for versatile industrial communication interfaces
- 256KB flash and 96KB SRAM with full-speed USB and advanced motion control PWM
- Industrial temperature range (-40°C to +85°C) in compact 144-pin LQFP package
What is LM3S5B91-IQC80-C0 used for?
The LM3S5B91-IQC80-C0 is well-suited for industrial networking equipment, factory automation controllers, and building management systems requiring Ethernet connectivity. Its integrated USB OTG and CAN interfaces make it ideal for multi-protocol industrial nodes, motor drive controllers, and HMI panels. The device also targets medical instrumentation and energy monitoring applications where reliable real-time control with network reporting is essential.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Country of Origin | Country of Origin |
What are equivalent replacements for LM3S5B91-IQC80-C0?
Compatible alternatives and drop-in replacements for LM3S5B91-IQC80-C0:
Frequently Asked Questions
What is the CPU architecture and maximum clock speed of the LM3S5B91-IQC80-C0?
The LM3S5B91-IQC80-C0 is based on the ARM Cortex-M3 32-bit RISC processor and operates at a maximum clock frequency of 80MHz. It includes a Harvard architecture with separate instruction and data buses, enabling efficient pipeline operation for real-time embedded applications.
Does the LM3S5B91-IQC80-C0 support Ethernet connectivity, and does it require an external PHY?
Yes, the LM3S5B91-IQC80-C0 integrates both an Ethernet MAC and a 10/100 PHY on-chip, so no external PHY chip is required. This reduces BOM cost and board space, making it ideal for industrial networking devices, embedded web servers, and IoT gateway applications that need direct Ethernet connectivity.
What communication interfaces are available on the LM3S5B91-IQC80-C0?
The LM3S5B91-IQC80-C0 includes a rich set of communication peripherals: integrated Ethernet MAC/PHY, USB 2.0 OTG (full-speed), two CAN 2.0 controllers, multiple UART, SSI/SPI, and I2C interfaces. This broad peripheral set supports complex multi-protocol industrial systems without additional bridge chips.
What package type is used for the LM3S5B91-IQC80-C0 and what is its operating temperature range?
The LM3S5B91-IQC80-C0 comes in a 144-pin LQFP (Low-Profile Quad Flat Package) with 0.5mm pitch. It is rated for the industrial temperature range of -40°C to +85°C, making it suitable for harsh environments found in factory floors, outdoor control panels, and automotive-adjacent applications.
What are typical applications for the LM3S5B91-IQC80-C0?
Typical applications include industrial Ethernet controllers, building automation gateways, motor drive systems with CAN communication, medical instrumentation with network reporting, energy metering equipment, and embedded HMI panels. The combination of Ethernet, USB OTG, and dual CAN on a single chip simplifies system design for multi-protocol industrial nodes.
Related Guides
CSD87313DMS Synchronous Buck Power Stage Design Guide
Design a compact CSD87313DMS synchronous buck stage with practical guidance for loss, gate drive, PCB layout, EMI, thermal validation, and sourcing.
Aug 6, 2026
STEF05SGR eFuse Selection Guide for 5 V Overcurrent Protection
Choose STEF05SGR for 5 V overcurrent protection by checking current-limit margin, inrush, thermal loss, fault response, and sourcing.
Aug 6, 2026
C0402C103K3RACTU Selection Guide: Choosing a 10 nF 0402 MLCC
Select C0402C103K3RACTU by voltage margin, X7R behavior, tolerance, 0402 assembly risk, and qualified alternatives.
Aug 4, 2026
STM32H753VIT6 MCU Selection Guide: Memory, Package, Connectivity, and Security
Choose STM32H753VIT6 by evaluating memory architecture, LQFP-100 pin fit, connectivity, security, power, and sourcing tradeoffs.
Aug 4, 2026
Why Buy from FindMyChip
About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
More from Texas Instruments
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“The anti-counterfeit verification gave us confidence we'd never had with other China suppliers.”
You May Also Like
ACS770ECB-200U-PFF-T
Allegro Microsystems
Integrated Circuit
ACS770KCB-150U-PFF-T
Allegro Microsystems
Integrated Circuit
MC33901WEF
NXP
Integrated Circuit
MC7808BDTRKG
ON Semiconductor
Integrated Circuit
PA94EC
Apex Microtechnology
Integrated Circuit
AP7315-28SR-7
Diodes Inc.
Integrated Circuit
74HCT245D
Nexperia
Integrated Circuit
CY62256VNLL-70ZXCT
Cypress Semiconductor
Integrated Circuit
EPM7032AETC44-4N
Intel
Integrated Circuit
EPM3512AQC208-10N
Intel
Integrated Circuit
EPM3256ATC144-7N
Intel
Integrated Circuit
EPM3256AQC208-7N
Intel
Integrated Circuit
EPM3256AQC208-10N
Intel
Integrated Circuit
EPM3128ATC100-7N
Intel
Integrated Circuit
EPM1270F256C4N
Intel
Integrated Circuit
EPF8282ATC100-4N
Intel
Integrated Circuit
EPF6016QC208-2N
Intel
Integrated Circuit
EPF6016ATC144-3N
Intel
Integrated Circuit
EPF10K30ATC144-3N
Intel
Integrated Circuit
EPC2TI32N
Intel
Integrated Circuit
EPC2LC20
Intel
Integrated Circuit
EP3SL150F1152C4N
Intel
Integrated Circuit
EP2SGX60DF780C5N
Intel
Integrated Circuit
EP2SGX60CF780C5N
Intel
Integrated Circuit