MICROCHIP KSZ9031RNXCA

The KSZ9031RNX is a completely integrated triple-speed (10Base-T/100Base-TX/1000Base-T) Ethernet physicallayer transceiver for transmission and reception of data on standard CAT-5 unshielded twisted pair (UTP) cable. The KSZ9031RNX 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. The KSZ9031RNX reduces board cost and simplifies board layout by using on-chip termination resistors for the four differential pairs and by integrating an LDO controller to drive a low-cost MOSFET to supply the 1.2V core. The KSZ9031RNX offers diagnostic features to facilitate system bring-up and debugging in production testing and in product deployment. Parametric NAND tree support enables fault detection between KSZ9031 I/Os and the board. The LinkMD TDR-based cable diagnostic identifies faulty copper cabling. Remote and local loopback functions verify analog and digital data paths.

• Single-chip 10/100/1000Mbps IEEE 802.3-compliant Ethernet transceiver
• RGMII timing supports on-chip delay according to RGMII Version 2.0, with programming options for external delay and making adjustments and corrections to TX and RX timing paths
• RGMII with 3.3V/2.5V/1.8V tolerant I/Os
• Auto-negotiation to automatically select the highest linkup speed (10/100/1000Mbps) 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 one external FET to generate 1.2V for the core
• Jumbo frame support up to 16KB
• 125MHz reference clock output
• Energy detect power-down mode for reduced power consumption when the cable is not attached
• Energy Efficient Ethernet (EEE) support with low-power idle (LPI) mode and clock stoppage for 100Base-TX/ 1000Base-T and transmit amplitude reduction with 10Base-Te option
• Wake-On-LAN (WOL) support with robust custompacket detection
• AEC-Q100 qualified for automotive applications (KSZ9031RNXUA, KSZ9031RNXVA)
• Programmable LED outputs for link, activity, and speed
• Baseline wander correction
• LinkMD TDR-based cable diagnostic to identify faulty copper cabling
• Parametric NAND tree support to detect faults between chip I/Os and board
• Loopback modes for diagnostics
• Automatic MDI/MDI-X crossover to detect and correct 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 (DVDDL, AVDDL, AVDDL_PLL): 1.2V (external FET or regulator) – VDD I/O (DVDDH): 3.3V, 2.5V, or 1.8V – Transceiver (AVDDH): 3.3V or 2.5V (commercial temp)
• Available in a 48-pin QFN (7mm×7mm) package

• 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