CS8952
CrystalLAN™ 100BASE-X and 10BASE-T Transceiver
Features
Single-Chip IEEE 802.3 Physical Interface IC for
100BASE-TX, 100BASE-FX and 10BASE-T
Adaptive Equalizer provides Extended Length
Operation (>160 m) with Superior Noise
Immunity and NEXT Margin
Extremely Low Transmit Jitter (<400 ps)
Low Common Mode Noise on TX Driver for
Reduced EMI Problems
Integrated RX and TX Filters for 10BASE-T
Compensation for Back-to-Back “Killer Packets”
Digital Interfaces Supported
– Media Independent Interface (MII) for 100BASE-X
and 10BASE-T
– Repeater 5-bit code-group interface (100BASE-X)
– 10BASE-T Serial Interface
Description
The CS8952 uses CMOS technology to deliver a high-
performance, low-cost 100BASE-X/10BASE-T Physical
Layer (PHY) line interface. It makes use of an adaptive
equalizer optimized for noise and near end crosstalk
(NEXT) immunity to extend receiver operation to cable
lengths exceeding 160 m. In addition, the transmit cir-
cuitry has been designed to provide extremely low
transmit jitter (<400 ps) for improved link partner perfor-
mance. Transmit driver common mode noise has been
minimized to reduce EMI for simplified FCC certification.
The CS8952 incorporates a standard Media Indepen-
dent Interface (MII) for easy connection to a variety of 10
and 100 Mb/s Media Access Controllers (MACs). The
CS8952 also includes a pseudo-ECL interface for use
with 100Base-FX fiber interconnect modules.
ORDERING INFORMATION
See
Register Set Compatible with DP83840A
IEEE 802.3 Auto-Negotiation with Next Page
Support
Six LED drivers (LNK, COL, FDX, TX, RX, and
SPD)
Low power (135 mA Typ) CMOS design operates
on a single 5 V supply
CS8952 10BaseT/100Base-X
Transceiver
TX_EN
10/100
Manchester
Encoder
10BaseT
Filter
MLT-3
Encoder
Slew Rate
Control
TX_ER/TXD4
TXD[3:0]
TX_CLK
4B/5B
Encoder
M
U
X
TX+,
TX-
Scrambler
MDC
MII_IRQ
MDIO
Media Independent Interface
(MII)
Fiber NRZI
Interface
Fiber NRZI
Interface
10/100
4B/5B
Decoder
Descrambler
MLT-3
Decoder
100BaseT
Slicer
ECL Driver
TX_NRZ+,
TX_NRZ-
RX_NRZ+,
RX_NRZ-
ECL Receiver
CRS
COL
RX_ER/RXD4
RX_DV
RXD[3:0]
RX_CLK
RX_EN
M
U
X
Adaptive Eq. &
Baseline Wander
Compensation
RX+,
RX-
Manchester
Decoder
10BaseT
Slicer
10BaseT
Filter
MII
Control/Status
Registers
Link
Management
Timing
Recovery
Auto
Negotiation
LED
Drivers
LED1
LED2
LED3
LED4
LED5
http://www.cirrus.com
Copyright
©
Cirrus Logic, Inc. 2007
(All Rights Reserved)
JAN ‘07
DS206F1
CIRRUS [ CIRRUS LOGIC ]
