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Micrel Semiconductor - 10Base-T/100Base-TX Physical Layer Transceiver

Numéro de référence KSZ8091MNX
Description 10Base-T/100Base-TX Physical Layer Transceiver
Fabricant Micrel Semiconductor 
Logo Micrel Semiconductor 





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KSZ8091MNX fiche technique
KSZ8091MNX/KSZ8091RNB
10Base-T/100Base-TX
Physical Layer Transceiver
Revision 1.2
General Description
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. Micrel LinkMD® TDR-based cable diagnostics
identify faulty copper cabling.
The KSZ8091MNX and KSZ8091RNB are available in 32-
pin, lead-free QFN packages (see “Ordering Information”).
Datasheets and support documentation are available on
website at: www.micrel.com.
Features
Single-chip 10Base-T/100Base-TX IEEE 802.3
compliant Ethernet transceiver
MII interface support (KSZ8091MNX)
RMII v1.2 interface support with a 50MHz reference
clock output to MAC, and an option to input a 50MHz
reference clock (KSZ8091RNB)
Back-to-back mode support for a 100Mbps 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 (10/100Mbps) 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 custom-packet detection
HBM ESD rating (6kV)
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 • http://www.micrel.com
August 31, 2015
Revision 1.2

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