KSZ8091 Series
10/100 Base-T/TX Ethernet Transceiver with Power Saving Features
Manufacturer: Microchip Technology
Catalog
10/100 Base-T/TX Ethernet Transceiver with Power Saving Features
Key Features
• **•**Single-chip 10Base-T/100Base-TX IEEE 802.3 compliant Ethernet transceiver
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• **•**Wake-on-LAN (WOL) support with either magic packet, link status change, or robust custom-packet detection
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• **•**Power-down and power-saving modes
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• **•**MII interface support (KSZ8091MNX, KSZ8091MLX)
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• **•**RMII v1.2 interface support with a 50MHz reference clock output to MAC and an option to input a 50MHz reference clock (KSZ8091RNB)
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• **•**Back-to-back mode support for a 100Mbps copper repeater
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• **•**MDC/MDIO management interface for PHY register configuration
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• **•**Programmable interrupt output
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• **•**LED outputs for link and activity status indication, plus speed indication for KSZ8091RNB
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• **•**On-chip termination resistors for the differential pairs
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• **•**Baseline wander correction
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• **•**HP Auto MDI/MDI-X to reliably detect and correct straight-through and crossover cable connections with disable and enable option
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• **•**Auto-negotiation to automatically select the highest link-up speed (10/100Mbps) and duplex (half/full)
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• **•**LinkMD® TDR-based cable diagnostics to identify faulty copper cabling
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• **•**Parametric NAND Tree support for fault detection between chip I/Os and the board
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• **•**Loopback modes for diagnostics
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• **•**Single 3.3V power supply with VDD I/O options for 1.8V, 2.5V, or 3.3V
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• **•**Built-in 1.2V regulator for core
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• **•**Available in 24-pin (4mm x 4mm) QFN, 32-pin (5mm x 5mm) QFN and 48-pin (7mm x 7mm) LQFP packages
Description
AI
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, 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 and KSZ8091MLX offer the Media Independent Interface (MII), while the the KSZ8091RNx offer the Reduced Media Independent Interface (RMII) for direct connection with MII/RMII-compliant Ethernet MAC processors and switches.
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. Microchip's LinkMD® TDR-based cable diagnostics identify faulty copper cabling.
The KSZ8091RNA and KSZ8091RND are available in a 24-pin (4mm x 4mm) QFN package. The KSZ8091MNX and KSZ8091RNB are available in a 32-pin, lead-free QFN packages. The KSZ8091MLX is available in a 48-pin (7mm x 7mm) LQFP package.
Microchip's complimentary and confidential [MicroCHECK](https://www.microchip.com/en-us/support/design-help/design-check-services) design review service, which offers insight from the initial concept to the final PCB layout, is available to customers who are using our products in their projects. You can confidently submit your design materials in a secure and private setting, and our expert engineers will provide individualized feedback to enhance your design. MicroCHECK design review service is subject to Microchip's [Program Terms and Conditions](https://www.microchip.com/en-us/support/design-help/design-check-services/design-check-services-program-terms-and-conditions) and requires a myMicrochip account.
