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 system bring-up and debugging in production testing and LinkMD TDR-based cable diagnostics for identification in product deployment. Parametric NAND tree support of faulty copper cabling enables fault detection between KSZ9021 I/Os and board. Parametric NAND Tree support for fault detection Micrel LinkMD TDR-based cable diagnostics permit between chip I/Os and board. identification of faulty copper cabling. Remote and local Loopback modes for diagnostics loopback functions provide verification of analog and digital data paths. Automatic MDI/MDI-X crossover for detection and correction of pair swap at all speeds of operation The KSZ9021GN is available in a 64-pin, lead-free QFN package (See Ordering Information). Functional Diagram LinkMD is a registered trademark of Micrel, Inc. Micrel Inc. 2180 Fortune Drive San Jose, CA 95131 USA tel +1 (408) 944-0800 fax + 1 (408) 474-1000 Micrel, Inc. KSZ9021GN More Features Applications Automatic detection and correction of pair swaps, pair Laser/Network Printer skew and pair polarity Network Attached Storage (NAS) MDC/MDIO Management Interface for PHY register Network Server configuration Gigabit LAN on Motherboard (GLOM) Interrupt pin option Broadband Gateway Power down and power saving modes Gigabit SOHO/SMB Router Operating Voltages IPTV Core: 1.2V (external FET or regulator) IP Set-top Box I/O: 3.3V or 2.5V Game Console Transceiver: 3.3V Triple-play (data, voice, video) Media Center Available in 64-pin QFN (8mm x 8mm) package Media Converter Ordering Information Part Number Temp. Range Package Lead Finish Description KSZ9021GN 0C to 70C 64-Pin QFN Pb-Free GMII / MII, Commercial Temperature (1) KSZ9021GNI 64-Pin QFN Pb-Free GMII / MII, Industrial Temperature 40C to 85C Note: 1. Contact factory for lead time. M9999-091010-1.1 September 2010 2