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KSZ9021

Gigabit Ethernet Transceiver

Status: Not Recommended for new designs

Features:

  • Single-chip 10/100/1000Mbps IEEE 802.3 compliant Ethernet Transceiver
  • KSZ9021G features GMII/MII standard compliant interface
  • KSZ9021R features RGMII interface compliant to RGMII Version 1.3
  • GMII/MII/RGMII I/Os with 3.3V/2.5V tolerant and programmable timings to adjust and correct delays on both Tx and Rx paths
  • Auto-negotiation to automatically select the highest link up speed (10/100/100Mbps) and duplex (half/full)
  • On-chip termination resistors for the differential pairs
  • On-chip LDO controller to support single 3.3V supply operation – requires only external FET to generate 1.2V for the core
  • Jumbo frame support up to 16KB
  • 125MHz Reference Clock Output
  • Programmable LED outputs for link, activity and speed
  • Baseline Wander Correction
  • LinkMD® TDR-based cable diagnostics for identification of faulty copper cabling
  • Parametric NAND Tree support for fault detection between chip I/Os and board.
  • Loopback modes for diagnostics
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Overview
Documents
Development Environment
RoHS Information
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Device Overview

Summary

The KSZ9021 is a completely integrated triple speed (10Base-T/100Base-TX/1000Base-T) Ethernet Physical Layer Transceiver for transmission and reception of data over standard CAT-5 unshielded twisted pair (UTP) cable.

The KSZ9021Gxx provides the industry standard Gigabit Media Independent Interface/Media Independent Interface (GMII/MII) for connection to GMII/MII MACs in Gigabit Ethernet Processors and Switches for data transfer at 1000Mbps or 10/100Mbps speed. The KSZ9021Rxx provides the Reduced Gigabit Media Independent Interface (RGMII).

The KSZ9021 reduces board cost and simplifies board layout by using on-chip termination resistors for the four differential pairs and by integrating a LDO controller to drive a low cost MOSFET to supply the 1.2V core. The KSZ9021 provides diagnostic features to facilitate system bring-up and debugging in production testing and in product deployment. Parametric NAND tree support enables fault detection between KSZ9021 I/Os and board. Micrel LinkMD® TDR-based cable diagnostics permit identification of faulty copper cabling. Remote and local loopback functions provide verification of analog and digital data paths.

The KSZ9021RL is available in a 64-pin, lead-free E-LQFP package, and is offered as the KSZ9021RN in the smaller 48-pin QFN package. The KSZ9021GN is available in a 64-pin, lead-free QFN package and the KSZ9021GQ is available in a 128-pin, lead-free PQFP package.

Microchip's complimentary and confidential LANCheck® online design review service is available for customers who have selected our products for their application design-in. The LANCheck online design review service is subject to Microchip's Program Terms and Conditions and requires a myMicrochip account.

Please consider this device KSZ9031

Additional Features
    • Single-chip 10/100/1000Mbps IEEE 802.3 compliant Ethernet Transceiver
    • KSZ9021G features GMII/MII standard compliant interface
    • KSZ9021R features RGMII interface compliant to RGMII Version 1.3
    • GMII/MII/RGMII I/Os with 3.3V/2.5V tolerant and programmable timings to adjust and correct delays on both Tx and Rx paths
    • Auto-negotiation to automatically select the highest link up speed (10/100/100Mbps) and duplex (half/full)
    • On-chip termination resistors for the differential pairs
    • On-chip LDO controller to support single 3.3V supply operation – requires only external FET to generate 1.2V for the core
    • Jumbo frame support up to 16KB
    • 125MHz Reference Clock Output
    • Programmable LED outputs for link, activity and speed
    • Baseline Wander Correction
    • LinkMD® TDR-based cable diagnostics for identification of faulty copper cabling
    • Parametric NAND Tree support for fault detection between chip I/Os and board.
    • Loopback modes for diagnostics
Parametrics
Name
Value
Description
Gigabit Ethernet Transceiver with RGMII/GMII/MII Support
Ethernet Bandwidth
10/100/1000Mbps
LEDs
2
# of Ethernet Ports
1
Interface
MII/RGMII/GMII
Temp. Range Min. (°C)
-40
Temp. Range Max. (°C)
85
HP-Auto MDIX
Yes
Interface1
MII, RGMII, GMII
Copper Support
Yes
Supply Voltage (V)
3.3
Internal Regular
Yes
MAC I/O Voltage
3.3
Cable Diagnostics
Yes
On-Chip Termination
Yes

Documents

Jump to:

Migration Guide

Design Guides

02/19/2016
3900KB
02/19/2016
618KB
02/19/2016
3007KB
02/19/2016
3991KB

Software Library

Development Environment

  • Software Libraries
Software Libraries
Driver is located in Linux Kernel

The driver for this device resides in the Linux Kernel found here https://www.kernel.org/

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RoHS Information

Part Number
Device Weight (g)
Shipping Weight (Kg)
Lead Count
Package Type
Package Width
Solder Composition
JEDEC Indicator
RoHS
China EFUP
KSZ9021RL
0.368300
1.350000
64
LQFP
10x10x1.4mm
Matte Tin
e3
KSZ9021RLI
0.368300
1.350000
64
LQFP
10x10x1.4mm
Matte Tin
e3
KSZ9021GQI
1.761500
4.015152
128
PQFP
14x20x2.72mm
Matte Tin
e3
KSZ9021GQ
1.761500
4.015152
128
PQFP
14x20x2.72mm
Matte Tin
e3
KSZ9021RNI
0.131200
0.757692
48
VQFN
7x7x0.9mm
NiPdAu
e4
KSZ9021GN
0.175000
0.798851
64
VQFN
8x8x0.9mm
NiPdAu
e4
KSZ9021GN-TR
0.175000
0.788000
64
VQFN
8x8x0.9mm
NiPdAu
e4
KSZ9021GNI
0.175000
0.798851
64
VQFN
8x8x0.9mm
NiPdAu
e4
KSZ9021RN
0.131200
0.757692
48
VQFN
7x7x0.9mm
NiPdAu
e4
To see a complete listing of RoHS data for this device, please Click here
Shipping Weight = Device Weight + Packing Material weight. Please contact sales office if device weight is not available.

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