KSZ8721BLI is a 10/100BASE-T/TX/FX Ethernet physical layer transceiver (PHY) from Microchip Technology

designed for high-performance network connectivity in embedded systems.

Key Features of KSZ8721BLI

1. Ethernet Standards Compliance

   • Supports 10BASE-T, 100BASE-TX, and 100BASE-FX standards, fully compliant with IEEE 802.3 & IEEE 802.3u

   • Integrated Physical Medium Attachment (PMA), Physical Medium Dependent (PMD), and Physical Coding Sublayer (PCS) functions

2. Interfaces & Flexibility

   • Supports MII (Media Independent Interface) and RMII (Reduced MII) for host communication

   • On-chip 10BASE-T output filtering, eliminating the need for external filters

3. Auto-Negotiation & Configuration

   • Automatic speed (10/100 Mbps) and duplex (full/half) negotiation

   • Configurable via MII management interface or external control pins

4. Power Efficiency

   • Single 3.3V power supply with built-in regulator (2.5V core)

   • Low power consumption (<340mW, including driver current)

5. Robust Design

   • 48-pin LQFP package (7×7 mm, surface-mount)

   • Industrial temperature range (-40°C to +85°C)

Applications

The KSZ8721BLI is widely used in:

• Industrial Automation: PLCs, motor control systems.

• Consumer Electronics: Smart home devices, network printers.

• Telecom & Networking: Routers, switches, and modems.

• Embedded Systems: IoT gateways, medical devices.

Technical Summary

• Package: 48-pin LQFP.

• Data Rates: 10/100 Mbps.

• Key Protocols: MII, RMII.

• Compliance: RoHS, AEC-Q100 (industrial grade)

Who We Are
Founded in 2009, Berton Electronics Limited has grown into a globally recognized distributor of electronic components, trusted by enterprises, research institutions, and enthusiasts across 50+ countries.

 As an authorized partner to 500+ industry-leading brands—including TI, STMicroelectronics, NXP, XILINX, ADI,Microchip and Qualcomm—we specialize in bridging the gap between manufacturers and clients, delivering original, high-quality components for cutting-edge technologies.

Our Journey & Global Presence

From our roots in Shenzhen, we’ve expanded strategically to establish branches in Hong Kong and Singapore  enabling us to serve clients with localized support and streamlined logistics. 

Over 16+ years, we’ve built reliable partnerships with manufacturers in Europe, the U.S., Japan and South Korea, ensuring stable supply chains even for hard-to-source, military-grade, or obsolete components.

Our Commitment to Quality

Quality is our Number one focus . We hold ISO9001:2014 (Quality Management System) and ISO14001:2014 (Environmental Management System) certifications, ensuring every component (passive components and active components ) —meets strict industry standards. 

Our team of 200+ experts (5% with master’s degrees, 15% bachelor’s) combines technical expertise with market insights to solve your sourcing challenges.

What We Distribute 

As a broad-line stocking distributor of both active and passive components, we provide electronic components to commercial, industrial, and defense/aerospace clients. 

With access to millions of components, we specialize in integrated circuits, semiconductors, memory, microprocessors, transistors, resistors, and relays.

Have strong advantage Brands: ADI ,XILINX, TI, ST, Vicor ,Mini-circuit, Microchip, Infineon, and 500+ more.

Our Mission & Values

Mission: To maximize customer value through "integrity, quality, on-time delivery, and professional service."

Vision: To be the world’s most trusted one-stop partner for electronic components, driving innovation across industries.

Values: Reliability, expertise, agility, and long-term partnership.

Why Choose Berton Electronics limted?

Genuine Products: 100% original components with full traceability.

Global Sourcing: Access to 2M+ in-stock models and hard-to-find parts.

Fast Turnaround: Average delivery time of 2-5 days for in-stock items.

Tailored Solutions: Customized support for small businesses to Fortune 500 companies.

Let's work together 

Whether you need Iot components, automotive-grade ICs, or obsolete electronic components, we’re here to help. Contact our team today for a quote or to discuss your needs.