LM3S9B81-IQC80-C1T Texas Instruments Integrated Circuit (Other) In Stock
Texas Instruments LM3S9B81 is a 32-bit ARM Cortex-M3 microcontroller running at up to 80 MHz with 256 KB Flash, 96 KB SRAM, 65 GPIO lines, and integrated USB, CAN, and Ethernet MAC. From $12 in stock worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Other
- Pin Count
- 100
- Lifecycle
- OBSOLETE
- Datasheet
- LM3S9B81-IQC80-C1T Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 32-bit ARM Cortex-M3 core running at up to 80 MHz for high-performance embedded control
- Integrated 10/100 Ethernet MAC, USB OTG, and CAN 2.0 interfaces in a single QFP-100 package
- 12-bit ADC with 16 channels and 1 MSPS sample rate enabling precision analog signal acquisition
Applications
The LM3S9B81 is well-suited for industrial automation systems requiring real-time Ethernet connectivity and multi-protocol communication at 80 MHz. Its integrated USB OTG and CAN 2.0 interfaces make it a strong fit for medical instruments, motor drive controllers, and smart energy meters. The 65 GPIO lines and rich peripheral set support complex embedded designs that demand both high I/O density and deterministic performance.
Specifications
| Reach Compliance Code | Unknown |
| YTEOL | 0 |
| Has ADC | YES |
| Bit Size | 32 |
| Boundary Scan | NO |
| Clock Frequency-Max | 0.032MHz |
| DAC Channels | NO |
| DMA Channels | YES |
| JESD-30 Code | S-PQFP-G100 |
| Number of I/O Lines | 65 |
| On Chip Program ROM Width | 8 |
| PWM Channels | YES |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | QFP100,.63SQ,20 |
| Package Shape | SQUARE |
| Package Style | FLATPACK |
| Peak Reflow Temperature (Cel) | NOT SPECIFIED |
| Qualification Status | Not Qualified |
| RAM (bytes) | 98304 |
| ROM (words) | 262144 |
| ROM Programmability | FLASH |
| Speed | 80MHz |
| Supply Voltage-Max | 1.32V |
| Supply Voltage-Min | 1.2V |
| Supply Voltage-Nom | 1.2V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.5mm |
| Terminal Position | QUAD |
| Time@Peak Reflow Temperature-Max (s) | NOT SPECIFIED |
| uPs/uCs/Peripheral ICs Type | MICROCONTROLLER |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| HTS Code | 8542.31.00.25 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for LM3S9B81-IQC80-C1T:
Frequently Asked Questions
What is the maximum CPU clock frequency of the LM3S9B81 and how does it affect real-time control performance?
The LM3S9B81 ARM Cortex-M3 core runs at up to 80 MHz, delivering deterministic interrupt latency under 12 clock cycles, which enables real-time PID control loops and motor-drive algorithms executing at rates above 10 kHz with 256 KB Flash for code storage.
Which connectivity interfaces does the LM3S9B81 integrate, and how do they simplify industrial network designs?
The device integrates a 10/100 Ethernet MAC, USB OTG (full-speed 12 Mbps), and CAN 2.0 (up to 1 Mbps), eliminating three external PHY or bridge chips, reducing BOM cost, and fitting all connectivity into the 100-pin LQFP package on a compact PCB.
How many ADC channels does the LM3S9B81 provide, and what sample rate can designers expect for multi-channel sensor acquisition?
The LM3S9B81 integrates a 12-bit ADC with 16 analog input channels and a 1 MSPS aggregate sample rate, allowing simultaneous sequencing across 8 channels to monitor current, voltage, and temperature sensors in a 3.3 V single-supply industrial system.
When is the LM3S9B81-IQC80-C1T a practical alternative to an external MCU plus Ethernet controller combination?
For board designs constrained to under 100 mm x 100 mm with a BOM target below $15, the LM3S9B81 replaces a discrete MCU plus ENC28J60 Ethernet controller pair, saving at least 2 PCB layers, reducing power draw by approximately 30 mW, and cutting total component count by 20 passives.
What temperature range does the LM3S9B81-IQC80-C1T support, and does it meet industrial deployment requirements?
The IQC80 variant is rated for -40°C to +85°C industrial temperature operation, satisfying IEC 61131-2 environmental requirements for PLCs, field instruments, and HVAC controllers that experience wide ambient swings over a product lifetime exceeding 10 years.
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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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