LM3S5B91-IQC80-C0T Texas Instruments Integrated Circuit (Other) In Stock
LM3S5B91-IQC80-C0T is a Stellaris ARM Cortex-M3 microcontroller from Texas Instruments running at up to 80 MHz with integrated Ethernet MAC/PHY, USB OTG, and CAN controllers. It features 256 kB of Flash memory, 64 kB of SRAM, and is housed in a 108-pin LQFP package for industrial connectivity applications. Available with worldwide shipping in RoHS-compliant packaging.
- 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-C0T?
- Integrated 10/100 Ethernet MAC and PHY with full duplex support eliminates external PHY components, reducing BOM cost and board area
- USB 2.0 OTG and CAN 2.0B controllers on the same chip enable multi-protocol industrial communication in a single 108-pin LQFP package
- 80 MHz ARM Cortex-M3 core with 256 kB Flash and 64 kB SRAM provides ample processing power and memory for real-time embedded networking tasks
What is LM3S5B91-IQC80-C0T used for?
LM3S5B91-IQC80-C0T is targeted at industrial automation gateways, building automation controllers, and energy metering systems that require simultaneous Ethernet, USB, and CAN communication from a single microcontroller at 80 MHz. Its integrated Ethernet MAC and PHY reduce external component count in networked embedded controllers and remote I/O modules. The device also fits HVAC system controllers and factory floor nodes where multiple field-bus protocols must coexist on a compact PCB.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Country of Origin | Country of Origin |
What are equivalent replacements for LM3S5B91-IQC80-C0T?
Compatible alternatives and drop-in replacements for LM3S5B91-IQC80-C0T:
Frequently Asked Questions
What communication peripherals are integrated in LM3S5B91-IQC80-C0T and what standards do they support?
LM3S5B91-IQC80-C0T integrates a 10/100 Mbps Ethernet MAC with internal PHY, a USB 2.0 OTG full-speed controller, and a CAN 2.0B controller, along with multiple UART, SPI, and I2C interfaces. This combination eliminates the need for external network controllers in industrial gateway designs and saves significant PCB area.
How much on-chip memory does LM3S5B91-IQC80-C0T provide for firmware and run-time data?
LM3S5B91-IQC80-C0T includes 256 kB of internal Flash program memory for firmware storage and 64 kB of SRAM for run-time data and stack. This memory complement is sufficient for embedded TCP/IP stacks, USB device drivers, and CAN protocol layers to run concurrently on the 80 MHz Cortex-M3 core.
What is the maximum operating frequency of LM3S5B91-IQC80-C0T and what supply voltage does it require?
LM3S5B91-IQC80-C0T operates at up to 80 MHz core clock speed, derived from an on-chip PLL, and requires a 3.3 V supply voltage for I/O pins while the internal logic runs at a lower internal voltage. This makes it straightforward to interface directly with 3.3 V sensors, transceivers, and memory devices without level shifting.
When would LM3S5B91-IQC80-C0T be chosen over an external-PHY Ethernet microcontroller in an industrial design?
LM3S5B91-IQC80-C0T is preferred when PCB space is critical, since the integrated 10/100 Ethernet PHY removes the need for a discrete PHY IC, associated magnetics layout complexity, and an extra power supply rail. For designs targeting 4 layers or fewer with fewer than 100 mm2 Ethernet footprint, the integrated PHY can reduce total board area by more than 30% compared to external-PHY solutions.
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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.
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