KSZ9021GQ
KSZ9021RL
Product Brief
Micrel, Inc. TEL: +1 408.944.0800 FAX: + 1 408.474.1000 http://www.micrel.com
Single-port 10/100/1000Base-T Gigabit Transceiver
Description
The KSZ9021GQ and KSZ9021RL are single-port
10/100/1000Base-T Gigabit transceivers, 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 media converter, GEPON
ONU router, wired/wireless Gigabit SOHO/SMB router,
and VoIP gateway.
The device is available in two RoHS-compliant package
options - 128-pin QFP (KSZ9021GQ, supporting GMII/MII)
and 64-pin E-LQFP (KSZ9021RL, supporting RGMI).
Industrial grade is also available.
The datasheets and support documentation can be found
on Micrel’s web site at: www.micrel.com.
___________________________________________________________________________________________________________
Block Diagram
M E D IA
IN T E R FA C E
PM A
TX10/100/1000
PM A
R X 100 0
PM A
R X 100
PM A
R X 10
C lo c k R e set
P C S 10
A U T O
N EG O TIA T IO N
P C S 100
P C S 100 0
G M II/R G M II/M II
Interface
L E D
D R IV E R S
C o nfigur atio n s
Micrel, Inc. TEL: +1 408.944.0800 FAX: + 1 408.474.1000 http://www.micrel.com
M9999-121108
Features Benefits
10/100/1000Base-T IEEE 802.3 compliance Standard compliance ensures to work with other standard
compliant, already deployed devices.
GMII, RGMII, and MII MAC interfaces
Flexible MAC interfaces (GMII/MII for KSZ9021GQ and RGMII
for KSZ9021RL) support direct connection to MACs in Ethernet
processors and switches at various data rates.
Integration of termination resistors on the chip
On-chip termination (eliminating 8 external resistors) not only
simplifies PCB design and reduces system BOM, but also
improves overall signal integrity and EMI emission.
Integration of a LDO controller on the chip
Integration of a LDO controller permits a low cost MOSFET to
supply the 1.2V core, which reduces board cost and simplifies
board layout.
LinkMD® TDR-based cable diagnostics
Built-in LinkMD® diagnostics helps identification of common
cabling problems, including those not addressed by IEEE. It
simplifies network deployment and reduces network downtime.
Automatic MDI/MDIX crossover for IEEE 802.3 and EIA/TIA 568
standards at all speeds of operation
Auto-MDI/MDIX eliminates the need for cross-over cable,
thus reduces installation costs. Easy to use.
Applications
• Wired/wireless Gigabit SOHO/SMB Router
• SOHO Media Center
• Voice-over-Internet Protocol (VoIP) Gateway
• Network Attached Storage
• Laser Printers and Projectors
• GEPON ONU Router
• Media Converter
• VPN/Firewall based SMB/SME Router
• Gigabit Ethernet LAN on Motherboard
• Integrated Broadband CPE (ADSL/VDSL/FTTH) Router
Corporate Sales Offices
Location Address Telephone Fax
Corporate HQ 2180 Fortune Dr. San Jose, CA 95131 USA (408) 944-0800 (408) 474-1000
Western USA 2180 Fortune Dr. San Jose, CA 95131 USA (408) 944-0800 (408) 474-1000
Central USA 2425 N. Central Expressway, Suite 351 Richardson, TX 57080 USA (972) 393-2533 (408) 474-1210
Eastern USA 93 Branch St. Medford, NJ 08055 USA (609) 654-0078 (609) 654-0989
Latin America 2425 N. Central Expressway, Suite 351 Richardson, TX 57080 USA (972) 393-2533 (408) 474-1210
China Rm 601, Bldg., Int’l Chamber of Commerce
Mansion, Fuhua Rd., Futian District
Shenzhen, P.R. China +86-755-8302-7618 +86-755-8302-7637
Japan Queen’s Tower A 14F, 2-3-1, Minato Mirai, Nishi-
Ku, Yokohama-Shi
Kanagawa 220-6014, Japan +81-45-224-6616 +81-45-224-6716
Korea 8F AnnJay Tower Bldg., 718-2, Yeoksam-Dong Kangnam-Ku, Seoul 135-080
Korea
82 (2) 538-2380 82 (2) 538-2381
Singapore/India 300 Beach Rd., #10-07 Concourse Singapore 199555 +65-6291-1318 +65-6291-1332
Taiwan 4F, No. 43 Lane 188, Rueiguang Rd., Neihu District Taipei, Taiwan, R.O.C. +866 (2) 8751-0600 +866 (2) 8751-0746
France/Southern
Europe
Les Laurentides
Immeuble Ontario, 3 avenue du Quebec
91140 Villebon sur Yvette,
France
+33 (0) 1.6092.4190 +33 (0) 1.6092.4189
UK/EMEA 1st Floor, 3 Lockside Place, Mill Lane, Newbury,
Berks
United Kingdom RG14 5QS +44 (1635) 524455` +44 (1635) 524466
Sweden/Nordic Lundagatan 11 6tr SE-171 63 Solna Sweden +46 (8) 470-5950 +46 (8) 470-5950
