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Microchip Technology KSZ9021GQI — Sensors & Transducers

KSZ9021GQI Gigabit Ethernet Transceiver – Microchip

MPNKSZ9021GQI
End of Life

Microchip Technology KSZ9021GQI, Gigabit Ethernet transceiver, full-duplex 8/8 driver/receiver, 3.135V–3.465V supply, -40°C to 85°C, 128-PQFP (14x20 mm), tray package.

$7.57Ref. price · indicative, final on quote
Microchip Technology KSZ9021GQI datasheet (PDF)
Packaging128-BFQFP
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

KSZ9021GQI specifications
ParameterValue
TypeTransceiver
MountingSurface Mount
Voltage3.135V ~ 3.465V
ProtocolGigabit Ethernet
Operating temperature-40°C ~ 85°C
DuplexFull
PackageTray
Case128-BFQFP
Number of drivers (Receivers)8/8

Product details

Gigabit Ethernet PHY in a 128-PQFP

The KSZ9021GQI is a full-duplex Gigabit Ethernet transceiver from Microchip Technology, built for 1000BASE-T copper links. It integrates eight drivers and eight receivers (8/8) in a single 128-PQFP package (14x20 mm), making it a direct-fit PHY for managed switches, industrial Ethernet nodes, and embedded networking modules that need a single-chip physical-layer interface.

Operates from a 3.135V to 3.465V supply — a standard 3.3V rail with ±5% tolerance.

Microchip lists the KSZ9021GQI as Active. The part is ROHS3 compliant.

Frequently asked questions

Is the KSZ9021GQI compatible with 3.3V logic?

Yes — the supply voltage range is 3.135V to 3.465V, which is a standard 3.3V rail with ±5% tolerance. The I/O levels are 3.3V-compatible, so no level shifters are needed when interfacing with a 3.3V MAC or controller.