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Price Comparison for KSZ9021GQI
Details for Microchip Technology


GbE Physical Layer Transceiver with GMII/MII
Buy Directly from Microchip Technology (4158 in Stock)
$3.9300 per unit
Series Information for KSZ9021GQI - Microchip Technology


  • feature
    125MHz Reference Clock Output
  • feature
    Auto-negotiation to automatically select the highest link up speed (10/100/100 Mbps) and duplex (half/full)
  • feature
    Automatic MDI/MDI-X crossover for detection and
  • feature
    Baseline Wander Correction
  • feature
    GMII/MII standard compliant interface
  • 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


TXRX GIGABIT 10/100/1000 128QFP
The KSZ9021GQ is a completely integrated triple speed (10Base-T/100Base-TX/1000Base-T) Ethernet Physical Layer Transceiver for transmission and reception of data on standard CAT-5 unshielded twisted pair (UTP) cable. The KSZ9021GQ provides the industry standard GMII/MII (Gigabit Media Independent Interface / Media Independent Interface) for direct connection to GMII/MII MACs in Gigabit Ethernet Processors and Switches for data transfer at 1000 Mbps or 10/100 Mbps speed. The KSZ9021GQ 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 KSZ9021GQ 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 KSZ9021GQ is available in a 128-pin, lead-free PQFP 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 3 - 168 hours
No SVHC (15-Jan-2018)
No. of Ports:
Operating Temperature Range:
-40°C to +85°C
Supply Current:
Supply Voltage Range:
3.135V to 3.465V

Alternate Descriptions

Avnet America

PQFP GbE Physical Layer Transceiver with GMII/MII

Microchip Technology Inc

GbE Physical Layer Transceiver with GMII/MII

Future Electronics

3.465 V Gigabit Ethernet Transceiver with GMII/MII Support - PQFP-128