Datasheet

KSZ8041NL/RNL
DS0002245B-page 4  2017 Microchip Technology Inc.
1.0 GENERAL DESCRIPTION
The KSZ8041NL is a single supply 10BASE-T/100BASE-TX physical layer transceiver, which provides
MII/RMII interfaces to transmit and receive data. A unique mixed-signal design extends signaling distance
while reducing power consumption.
HP Auto MDI/MDI-X provides the most robust solution for eliminating the need to differentiate between
crossover and straight-through cables.
The KSZ8041NL represents a new level of features and performance and is an ideal choice of physical layer
transceiver for 10BASE-T/100BASE-TX applications.
The KSZ8041RNL is an enhanced Reduced Media Independent Interface (RMII) version of the
KSZ8041NL that does not require a 50-MHz system clock. It uses a 25-MHz crystal for its input reference
clock and outputs a 50-MHz RMII reference clock to the media access control (MAC).
The KSZ8041NL and KSZ8041RNL are available in 32-pin, lead-free QFN packages (see Product Identifi-
cation System).
FIGURE 1-1: KSZ8041NL FUNCTIONAL DIAGRAM
10/100
Pulse
Shaper
NRZ/NRZI
MLT 3 Encoder
Parallel /Serial
Manchester Encoder
4B/5B Encoder
Scrambler
Parallel /Serial
Transmitter
TX+
TX-
Adaptive EQ
Base Line
Wander Correction
MLT3 Decoder
NRZI/NRZ
Clock
Recovery
4B/5B Decoder
Descrambler
Serial /Parallel
Auto
Negotiation
10Base-T
Receiver
Manchester Decoder
Serial /Parallel
PLL
LED
Driver
MII/RMII
Registers
and
Controller
Interface
RX-
RX+
XI
XO
LED1
LED0
Power Down
Power Saving
TXD3
TXD0
TXD1
TXD2
RXD3
TXEN
TXC
MDC
MDIO
RXER
RXD0
RXD1
RXD2
REXT
RXC
RXDV
CRS
COL
RST#
INTRP