KSZ9021RN
Product Brief
Single-port Gigabit Transceiver with RGMII Support
Description
The KSZ9021RN is a single-port 10/100/1000Base-T
Gigabit transceiver in industry’s smallest footprint,
supporting data transfer over standard CAT-5 unshielded
twisted pair cable. This device offers robust performance
and low power consumption. On-chip integration of
termination resistors and LDO controller, along with built-in
diagnostic features, significantly reduces the cost and the
complexity of Gigabit Ethernet applications. This device is
ideal for enabling Gigabit Ethernet performance in SOHO
and SMB networking applications, such as SOHO media
center, wired/wireless Gigabit SOHO/SMB router, and
VoIP gateway.
The KSZ9021GN provides the Reduced Gigabit Media
Independent Interface (RGMII) for direct connection to
RGMII MACs in Gigabit Ethernet Processors and Switches
for data transfer at 1000 Mbps speed.
The device is available in industry’s smallest package,
RoHS-compliant 48-pin QFN package. Industrial grade is
also available.
The datasheet and support documentation can be found
on Micrel’s web site at: www.micrel.com.
___________________________________________________________________________________________________________
Functional Diagram
On-c hip T erm inati on
Res is tors
RGMII
Ma g ne ti cs
10/100 /1000 Mbps
RGMII
Ethernet MAC
KSZ9021 RN
MDC / MDIO
Management
RJ-45
Connector
Media Types :
10Base -T
100Base -TX
1000 Base -T
LDO
Controller
VIN
3 .3 VA
VOUT
1.2 V (for core voltages
)
LinkMD is a registered trademark of Micrel, Inc.
Micrel, Inc.
TEL:
+1 408.944.0800
FAX
:
+ 1 408.474.1000
http://
www.micrel.com
MICREL [ MICREL SEMICONDUCTOR ]
