MICROCHIP KSZ8091RNBCA

The KSZ8091 is a single-supply 10BASE-T/100BASE-TX Ethernet physical-layer transceiver for transmission and reception of data over standard CAT-5 unshielded twisted pair (UTP) cable. The KSZ8091 is a highly integrated PHY solution. It reduces board cost and simplifies board layout by using on-chip termination resistors for the differential pairs, by integrating a low-noise regulator to supply the 1.2V core, and by offering a flexible 1.8/2.5/3.3V digital I/O interface. The KSZ8091MNX offers the Media Independent Interface (MII) and the KSZ8091RNB offers the Reduced Media Independent Interface (RMII) for direct connection with MII/RMII-compliant Ethernet MAC processors and switches. Energy Efficient Ethernet (EEE) provides further power saving during idle traffic periods and Wake-on-LAN (WOL) provides a mechanism for the KSZ8091 to wake up a system that is in standby power mode. The KSZ8091 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 KSZ8091 I/Os and the board. LinkMD TDR-based cable diagnostics identify faulty copper cabling. The KSZ8091MNX and KSZ8091RNB are available in 32-pin, lead-free QFN packages.

• Single-Chip 10BASE-T/100BASE-TX IEEE 802.3 Compliant Ethernet Transceiver
• MII Interface Support (KSZ8091MNX)
• RMII v1.2 interface support with a 50 MHz reference clock output to MAC, and an option to input a 50 MHz reference clock (KSZ8091RNB)
• Back-to-Back Mode Support for a 100 Mbps Copper Repeater
• MDC/MDIO Management Interface for PHY Register Configuration
• Programmable Interrupt Output
• LED Outputs for Link and Activity Status Indication, plus speed indication for KSZ8091RNB
• On-Chip Termination Resistors for the Differential Pairs
• Baseline Wander Correction
• HP Auto MDI/MDI-X to Reliably Detect and Correct Straight-Through and Crossover Cable Connections with Disable and Enable Option
• Auto-Negotiation to Automatically Select the Highest Link-Up Speed (10/100 Mbps) and Duplex (Half/Full)
• Energy Efficient Ethernet (EEE) Support with Low-Power Idle (LPI) Mode and Clock Stoppage (MII Version Only) for 100BASE-TX and Transmit Amplitude Reduction with 10BASE-Te Option
• Wake-on-LAN (WOL) Support with Either Magic Packet, Link Status Change, or Robust CustomPacket Detection
• HBM ESD Rating (6 kV)
• Power-Down and Power-Saving Modes
• LinkMD TDR-Based Cable Diagnostics to Identify Faulty Copper Cabling
• Parametric NAND Tree Support for Fault Detection Between Chip I/Os and the Board
• Loopback Modes for Diagnostics
• Single 3.3V Power Supply with VDD I/O Options for 1.8V, 2.5V, or 3.3V
• Built-In 1.2V Regulator for Core
• Available in 32-pin 5 mm x 5 mm QFN Package

• Game Consoles
• IP Phones
• IP Set-Top Boxes
• IP TVs
• LOM
• Printers