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KSZ8721CL from MICREL

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KSZ8721CL

Manufacturer: MICREL, MICREL

3.3V Single Power Supply 10/100BASE-TX/FX MII Physical Layer Transceiver

Partnumber Manufacturer Quantity Availability
KSZ8721CL MICREL, MICREL 953 In Stock

Description and Introduction

3.3V Single Power Supply 10/100BASE-TX/FX MII Physical Layer Transceiver The KSZ8721CL is a single-port 10/100 Ethernet physical layer transceiver (PHY) manufactured by Microchip Technology (formerly Micrel). Below are the factual specifications, descriptions, and features from Ic-phoenix technical data files:

### **Specifications:**
- **Manufacturer:** Microchip Technology (formerly Micrel)  
- **Interface:** MII (Media Independent Interface), RMII (Reduced Media Independent Interface)  
- **Data Rate:** 10BASE-T (10 Mbps), 100BASE-TX (100 Mbps)  
- **Compliance:** IEEE 802.3 (Ethernet), IEEE 802.3u (Fast Ethernet)  
- **Power Supply:** 3.3V  
- **Operating Temperature:** Commercial (0°C to +70°C) or Industrial (-40°C to +85°C)  
- **Package:** 48-pin LQFP (Low-Profile Quad Flat Package)  

### **Descriptions:**  
- The KSZ8721CL is a low-power, high-performance Ethernet PHY designed for embedded networking applications.  
- It supports auto-negotiation for speed and duplex mode detection.  
- Includes energy-efficient Ethernet (EEE) support for reduced power consumption.  
- Features baseline wander correction and adaptive equalization for robust signal integrity.  

### **Features:**  
- **Auto-Negotiation:** Automatically selects the best speed (10/100 Mbps) and duplex mode (half/full).  
- **Energy-Efficient Ethernet (EEE):** Compliant with IEEE 802.3az for reduced power usage during low traffic.  
- **Loopback Modes:** Supports MAC and PHY loopback for diagnostics.  
- **Jabber and Link Loss Detection:** Built-in protection mechanisms.  
- **LED Indicators:** Supports activity, link status, and speed indication.  
- **RMII Support:** Reduces pin count for cost-sensitive designs.  

This information is based solely on the manufacturer's datasheet and technical documentation.

Application Scenarios & Design Considerations

3.3V Single Power Supply 10/100BASE-TX/FX MII Physical Layer Transceiver

Alternative Part Number

  • DP83848CVV --: Single-port 10/100 Ethernet PHY with RMII/MII interface, functionally comparable to the KSZ8721CL and widely available from a different vendor.
  • LAN8720A --: Low-power 10/100 Ethernet PHY with RMII interface, pin-function compatible in many designs and from a different series/vendor.
  • RTL8201F --: Single-port 10/100 Fast Ethernet PHY with MII/RMII support, a common drop-in class alternative from a different manufacturer.
  • DP83848IVV --: Single-port 10/100 Ethernet PHY with MII/RMII interface, functionally comparable to the KSZ8721 and widely available.

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