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KSZ8721CL The Micrel KSZ8721CL is a 3.3V single power supply Fast Ethernet PHY transceiver. It supports 10/100Mbps speeds and MII/RMII interfaces.
Mfr Part #:

KSZ8721CL

Available from 1 distributors
Mfr Name: Micrel Inc.
Micrel Inc.
The Micrel KSZ8721CL is a 3.3V single power supply Fast Ethernet PHY transceiver. It supports 10/100Mbps speeds and MII/RMII interfaces.
✓ Total Stock: 510 pcs
$ Price Range: $12.91

KSZ8721CL Available from 1 distributor

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510 pcs
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KSZ8721CL Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Data Rate
Features
Interface
Mounting Type
Power Consumption
Protocol
Supply Voltage
Tape & Reel
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KSZ8721CL Description

Short technical summary and product information.

The Micrel KSZ8721CL is a single-chip 10/100BASE-TX/FX MII Physical Layer Transceiver designed for Fast Ethernet applications. It operates on a single 3.3V power supply and offers a 2.5V CMOS design with 2.5/3.3V tolerance on I/O.

 

This transceiver provides MII/RMII interfaces to MACs and switches, supporting 10BASE-T, 100BASE-TX, and 100BASE-FX protocols. It features on-chip auto-negotiation for automatic configuration of 10/100Mbps speeds and full-/half-duplex modes. The KSZ8721CL includes built-in analog front-end filtering for both 100BASE-TX and 10BASE-T, eliminating the need for external filters.

 

Available in a 48-pin LQFP package, the KSZ8721CL operates within a commercial temperature range of 0°C to +70°C. It also supports power-down and power-saving modes, along with LED outputs for link, activity, duplex, and speed indication. Additional features include MDI/MDI-X auto-crossover capability.

KSZ8721CL Quick Information

Product Type: Physical Layer Transceiver
Canonical Name: KSZ8721CL 10/100BASE-TX/FX MII Physical Layer Transceiver
Subcategory: Fast Ethernet PHY

KSZ8721CL Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected

KSZ8721CL Estimated Pricing

Qty Low High
1+ $12.91 $12.91

Estimated market price range - modelled values for guidance only, not live distributor offers.

KSZ8721CL Features

  • Single chip 10/100BASE-TX/FX solution.
  • Supports MII and Reduced MII (RMII) interfaces.
  • 3.3V single power supply operation.
  • Auto-negotiation for speed and duplex modes.
  • On-chip filtering for 100BASE-TX and 10BASE-T.

KSZ8721CL Applications

  • Ideal for 10/100Mbps Ethernet applications.
  • Suitable for MAC and switch interfaces.
  • Used in media converter designs.
  • Supports back-to-back configurations.

KSZ8721CL FAQs

6 frequently asked questions generated from this part’s specifications.
What is the operating voltage for the KSZ8721CL?

The KSZ8721CL operates on a single 3.3V power supply, with 2.5V/3.3V tolerance on I/O.

What are the supported Ethernet speeds for the KSZ8721CL?

The KSZ8721CL supports 10BASE-T, 100BASE-TX, and 100BASE-FX Ethernet speeds.

What type of interface does the KSZ8721CL use?

The KSZ8721CL supports MII and Reduced MII (RMII) interfaces.

What is the operating temperature range for the KSZ8721CL?

The commercial operating temperature range for the KSZ8721CL is 0°C to +70°C. An industrial range of -40°C to +85°C is also available.

What package is the KSZ8721CL available in?

The KSZ8721CL is available in a 48-pin LQFP package.

Does the KSZ8721CL support auto-negotiation?

Yes, the KSZ8721CL supports auto-negotiation for 10/100Mbps speed and full-/half-duplex modes.

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