KSZ8041NL/RNL
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
4B/5B Encoder
Scrambler
Parallel/Serial
NRZ/NRZI
MLT3 Encoder
MDC
MDIO
10/100
Pulse
Shaper
TX+
Transmitter
TXC
TX-
TXEN
TXD3
TXD2
TXD1
TXD0
Parallel/Serial
Manchester Encoder
REXT
MII/RMII
Registers
Adaptive EQ
Base Line
Wander Correction
MLT3 Decoder
NRZI/NRZ
RXC
4B/5B Decoder
Descrambler
Serial/Parallel
RX+
RX-
and
RXDV
RXD3
RXD2
Clock
Recovery
Controller
Interface
RXD1
RXD0
RXER
Auto
Negotiation
CRS
COL
10Base-T
Receiver
Manchester Decoder
Serial/Parallel
INTRP
RST#
Power Down
Power Saving
XI
LED0
LED1
LED
PLL
XO
Driver
DS0002245B-page 4
2017 Microchip Technology Inc.
MICROCHIP [ MICROCHIP ]
