KSZ9021GQI

The KSZ9021GQ is a completely integrated triple speed (10Base-T/100Base-TX/1000Base-T) Ethernet Physical Layer Transceiver for transmission and reception of data on standard CAT-5 unshielded twisted pair (UTP) cable. The KSZ9021GQ provides the industry standard GMII/MII (Gigabit Media Independent Interface / Media Independent Interface) for direct connection to GMII/MII MACs in Gigabit Ethernet Processors and Switches for data transfer at 1000 Mbps or 10/100Mbps speed. The KSZ9021GQ 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 KSZ9021GQ 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. Microchip LinkMD TDR-based cable diagnostics permit identification of faulty copper cabling. Remote and local loopback functions provide verification of analog and digital data paths. The KSZ9021GQ is available in a 128-pin, RoHS Compliant PQFP package.

Applications

• Laser/Network Printer
• Network Attached Storage (NAS)
• Network Server
• Gigabit LAN on Motherboard (GLOM)
• Broadband Gateway
• Gigabit SOHO/SMB Router
• IPTV
• IP Set-top Box
• Game Console
• Triple-play (data, voice, video) Media Center
• Media Converter

Key features

• Single-chip 10/100/1000Mbps IEEE 802.3 compliant Ethernet Transceiver
• GMII/MII standard compliant interface
• Auto-negotiation to automatically select the highest link up speed (10/100/100Mbps) and duplex (half/full)
• On-chip termination resistors for the differential pairs
• On-chip LDO controller to support single 3.3V supply operation – requires only external FET to generate 1.2V for the core
• Jumbo frame support up to 16KB
• 125MHz Reference Clock Output
• Programmable LED outputs for link, activity and speed
• Baseline Wander Correction
• LinkMD TDR-based cable diagnostics for identification of faulty copper cabling
• Parametric NAND Tree support for fault detection between chip I/Os and board.
• Loopback modes for diagnostics
• Automatic MDI/MDI-X crossover for detection and correction of pair swap at all speeds of operation
• Automatic detection and correction of pair swaps, pair skew and pair polarity
• MDC/MDIO Management Interface for PHY register configuration
• Interrupt pin option
• Power down and power saving modes
• Operating Voltages - Core: 1.2V (external FET or regulator) - I/O: 3.3V or 2.5V - Transceiver: 3.3V
• Available in 128-pin PQFP (14mm×20mm) package