SMSC LAN9420 - 10/100 PCI Ethernet Controller

Featured Products
•	ACS756 Hall-effect based Linear Current Sensor
•	Atmel Dataflash Serial Flash Memory
•	Exar Wireless UART Chipset
•	IDT Switch Solutions
•	Linear Step Down DC/DC uModule Regulator
•	Micrel MICRF211AYQS / MICRF112YMM
•	SMSC USB224x/225x USB 2.0 Flash Media Card Controllers
•	SMSC LAN931x Family of Ethernet Switches
•	SMSC LAN 9420 - 10/10 PCI Ethernet Controller
•	Vitesse 4 + 2-Port Router-on-a-Chip Switch
•	Vitesse VScope Embedded Waveform

Sample Requests

Home > Featured Products > Volume 7 - LAN9420 - 10/100 PCI Ethernet Controller



LAN9420 - 10/100 PCI Ethernet Controller
LAN9420

High-performance, 10/100 PCI Ethernet Controller with Scatter-Gather DMA Engine, Enabling Higher Throughput and Lower CPU Loading

SMSC’s LAN9420 is a full-featured 10/100 PCI Ethernet Controller which allows for simple and cost-effective integration of Fast Ethernet into a PCI-based system. The LAN9420 incorporates a PCI 3.0-compliant interface, scatter-gather DMA Engine, Checksum Offload Engine and 10/100 Ethernet MAC/PHY in a single-chip solution. LAN9420 provides full IEEE 802.3 compliance and supports full/half-duplex 10 BASE-T and 100 BASE-TX. An industrial temperature range -40º to 85ºC option is available (LAN9420i).

Highlights
•	Optimized for high-performance applications
•	Integrated descriptor-based scatter-gather DMA and IRQ deassertion timer effectively increase network throughput and reduce CPU loading
•	Integrated TX/RX Checksum Offload Engine reduces CPU overhead
•	Integrated PHY with HP-Auto MDIX support*
•	Reduced power operating modes with PCI Power Management Specification 1.1 compliance
•	Industrial temperature range -40° to 85°C option available (LAN9420i)

*HP Auto-MDIX eliminates the need for special “crossover” cables when connecting LAN devices together.

Features	Benefits
Descriptor-based scatter-gather DMA Engine and interrupt deassertion timer	Improves network throughput and CPU loading
RX/TX Checksum Offload Engine	Reduces CPU overhead and increases overall system performance
HP Auto-MDIX support	Eliminates costly end-customer support and returns due to improper Ethernet cable use
Mixed Endian	Independent control over register, descriptor, buffer endianess (big or little endian); easy integration to ARM^®/MIPS^®/PowerPC^®
128-pin VTQFP package	Lead-free RoHS-compliant package
Industrial temperature range -40˚ to 85˚C option available (LAN9420i)	Designed to perform in rugged industrial environments

LAN9420/9420i Block Diagram

Quick Links: Investor Relations • Press Releases • Glossary of Terms • Suggestions • Newsletter

Also Visit: Titan Supply Chain Services Corp. • Nu Horizons International