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KSZ8721BLI

MCHPKSZ8721BLI

Microchip Technology
1/1 Transceiver Full MII, RMII 48-LQFP (7x7)
Active1,502 in stock
Datasheet Digi-Key Compare Prices

Overview

The KSZ8721BLI is a single-supply 10/100BASE-TX/FX physical layer transceiver designed for power-sensitive Ethernet applications. It supports both MII and RMII interfaces for flexible connection to various Media Access Controllers (MACs). This industrial-grade device operates on a single 3.3V supply and is housed in a compact 48-lead LQFP package.

Why Choose This Part

The device features a single 3.3V supply requirement, simplifying power tree design and reducing component count. Its support for both MII and RMII provides hardware designers with options to balance pin usage against interface performance.

Applications

Industrial Control
Providing reliable Ethernet connectivity for PLCs and industrial automation equipment in harsh environments.
Networked Peripheral Devices
Integrating 10/100 Ethernet into printers, scanners, and POS terminals using the RMII interface to save pin count.
Embedded Systems
Adding networking capabilities to microcontrollers that feature an integrated MAC but require an external PHY.

Key Specifications

Type Transceiver
Duplex Full
Protocol MII, RMII
Mounting Type Surface Mount
Package / Case 48-LQFP
Voltage - Supply 3V ~ 3.6V
Operating Temperature -40degC ~ 85degC
Supplier Device Package 48-LQFP (7x7)
Number of Drivers/Receivers 1/1

Getting Started

To evaluate this PHY, designers typically use a microcontroller development board with an external PHY header or a custom PCB. Configuration is handled through the MDIO/MDC management interface or via hardware strapping pins to set the physical address and operating mode at boot.

KSZ8721 Family

Comparing specs that differ across variants. The current part is highlighted.

Part Number Package Voltage Stock
KSZ8721BLI (this part) LQFP-48 3V 1,502
KSZ8721BI BSSOP-48 2.375V 155

Also Consider

LAN8720A MCHPMicrochip Technology - A more modern, smaller footprint RMII-only 10/100 PHY commonly used in cost-sensitive designs.