Datasheet Microchip KSZ9021

KSZ9021GN
Gigabit Ethernet Transceiver
with GMII / MII Support General Description Features The KSZ9021GN is a completely integrated triple speed Single-chip 10/100/1000Mbps IEEE 802.3 compliant
(10Base-T/100Base-TX/1000Base-T) Ethernet Physical
Ethernet Transceiver
Layer Transceiver for transmission and reception of data GMII/MII standard compliant interface
on standard CAT-5 unshielded twisted pair (UTP) cable. Auto-negotiation to automatically select the highest link
The KSZ9021GN provides the industry standard GMII/MII
up speed (10/100/100Mbps) and duplex (half/full)
(Gigabit Media Independent Interface / Media Independent On-chip termination resistors for the differential pairs
Interface) for connection to GMII/MII MACs in Gigabit On-chip LDO controller to support single 3.3V supply
Ethernet Processors and Switches for data transfer at
operation – requires only external FET to generate 1.2V
1000 Mbps or 10/100Mbps speed.
for the core
The KSZ9021GN reduces board cost and simplifies board Jumbo frame support up to 16KB
layout by using on-chip termination resistors for the four 125MHz Reference Clock Output
differential pairs and by integrating a LDO controller to
drive a low cost MOSFET to supply the 1.2V core. Programmable LED outputs for link, activity and speed
The KSZ9021GN provides diagnostic features to facilitate Baseline Wander Correction
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system bring-up and debugging in production testing and LinkMD TDR-based cable diagnostics for identification
in product deployment. Parametric NAND tree support …

KSZ9021GQ
Gigabit Ethernet Transceiver
with GMII / MII Support General Description Features The KSZ9021GQ is a completely integrated triple speed Single-chip 10/100/1000 Mbps IEEE 802.3 compliant
(10Base-T/100Base-TX/1000Base-T) Ethernet Physical
Ethernet Transceiver
Layer Transceiver for transmission and reception of data GMII/MII standard compliant interface
on standard CAT-5 unshielded twisted pair (UTP) cable. Auto-negotiation to automatically select the highest link
The KSZ9021GQ provides the industry standard GMII/MII
up speed (10/100/100 Mbps) and duplex (half/full)
(Gigabit Media Independent Interface / Media Independent On-chip termination resistors for the differential pairs
Interface) for direct connection to GMII/MII MACs in On-chip LDO controller to support single 3.3V supply
Gigabit Ethernet Processors and Switches for data transfer
operation – requires only external FET to generate 1.2V
at 1000 Mbps or 10/100 Mbps speed.
for the core
The KSZ9021GQ reduces board cost and simplifies board Jumbo frame support up to 16KB
layout by using on-chip termination resistors for the four 125MHz Reference Clock Output
differential pairs and by integrating a LDO controller to
drive a low cost MOSFET to supply the 1.2V core. Programmable LED outputs for link, activity and speed
The KSZ9021GQ provides diagnostic features to facilitate Baseline Wander Correction
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system bring-up and debugging in production testing and LinkMD TDR-based cable diagnostics for identification
in product deployment. Parametric NAND tree support …

KSZ9021RL/RN
Gigabit Ethernet Transceiver
with RGMII Support
Revision 1.2 General Description Features 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.
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Micrel LinkMD TDR-based cable diagnostics permit
identification of faulty copper cabling. Remote and local
loopback functions provide verification of analog and …