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Price Comparison for KSZ9021RLI
Details for Microchip Technology


GbE Physical Layer Transceiver with GMII
Buy Directly from Microchip Technology (1120 in Stock)
$4.0900 per unit
Series Information for KSZ9021RLI - Microchip Technology


  • feature
    125MHz Reference Clock Output
  • feature
    Auto-negotiation to automatically select the highest link up speed (10/100/100Mbps) and duplex (half/full)
  • feature
    Baseline Wander Correction
  • feature
    Jumbo frame support up to 16KB
  • feature
    LinkMDu00ae TDR-based cable diagnostics for identification of faulty copper cabling
  • feature
    Loopback modes for diagnostics
  • feature
    On-chip LDO controller to support single 3.3V supply operation u2013 requires only external FET to generate 1.2V for the core
  • feature
    On-chip termination resistors for the differential pairs
  • feature
    Parametric NAND Tree support for fault detection between chip I/Os and board.
  • feature
    Programmable LED outputs for link, activity and speed
  • feature
    RGMII I/Os with 3.3V/2.5V tolerant and programmable timings to adjust and correct delays on both Tx and Rx paths
  • feature
    RGMII interface compliant to RGMII Version 1.3


The KSZ9021RL 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 KSZ9021RL provides the Reduced Gigabit Media Independent Interface (RGMII) for direct connection to RGMII MACs in Gigabit Ethernet Processors and Switches for data transfer at 10/100/1000Mbps speed. The KSZ9021RL 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 KSZ9021RL 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 (See Ordering Information).


Data Rate:
Ethernet Type:
IEEE 802.3
Supply Voltage Min:
Supply Voltage Max:
Controller IC Case Style:
No. of Pins:
IC Interface Type:
Operating Temperature Min:
Operating Temperature Max:
Product Range:
Automotive Qualification Standard:
RoHS Phthalates Compliant:
MSL 1 - Unlimited
No SVHC (27-Jun-2018)

Alternate Descriptions

Avnet America

Ethernet TXRX Single Chip 1.2V/2.5V/3.3V 10Mbps/100Mbps/1000Mbps

Avnet America product

Microchip Technology Inc

GbE Physical Layer Transceiver with GMII

Avnet Europe

Ethernet TXRX Single Chip 1.2V/2.5V/3.3V 10Mbps/100Mbps/1000Mbps

Avnet Europe product

Avnet Asia

Ethernet TXRX Single Chip 1.2V/2.5V/3.3V 10Mbps/100Mbps/1000Mbps

Avnet Asia product

Future Electronics

3.465 V Gigabit Ethernet Transceiver with RGMII Support - LQFP-64