KSZ8721CL A2 Micrel Inc, KSZ8721CL A2 Datasheet
KSZ8721CL A2
Manufacturer Part Number
KSZ8721CL A2
Description
TXRX PHY 10/100 3.3V 48-LQFP
Manufacturer
Micrel Inc
Type
Transceiverr
Datasheet
1.KSZ8721CL.pdf
(2 pages)
Specifications of KSZ8721CL A2
Number Of Drivers/receivers
1/1
Protocol
MII
Voltage - Supply
3 V ~ 3.6 V
Mounting Type
Surface Mount
Package / Case
48-LQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Micrel Semiconductor
www.micrel.com
Physical Layer Transceiver
3.3V 10/100BASE-TX/FX
Description
The KS8721CL is a 10BASE-T, 100BASE-TX, and
100BASE-FX physical layer transceiver providing MII/
RMII interfaces to MACs and switches. Using a unique
mixed-signal design that extends signaling distance while
reducing power consumption, the KS8721CL represents
Micrel’s fourth generation single-port Fast Ethernet PHY.
Micrel’s architecture dissipates an ultra-low 275mW in
power, including transmit output drivers. This translates to
increased reliability while enabling deployment in today’s
power-sensitive applications. Multiple power-down modes,
accessed via configuration pins or registers, allow further
levels of power saving through manual selection or auto-
matic detection of cable energy.
Block Diagram
RX+
RX–
TX+
TX–
XO
XI
Transmitter
PLL
TEL:
10BASE-T
Baseline Wander
Receiver
MLT3 Decoder
1.408.944.0800
Adaptive EQ
NRZI/NRZ
Correction
10/100
Shaper
Pulse
FAX:
1.408.474.1000
MLT3 Encoder
NRZ/NRZI
Power-Saving
Power-Down/
Negotiation
PWRDWN
Recovery
Clock
Auto
The KS8721CL automatically configures itself for 100Mbps
or 10Mbps and full- or half-duplex operation, using an on-
chip auto-negotiation algorithm. Combined with Auto MDI/
MDI-X for automatic correction and detection of crossover
and straight-through cables, the KS8721CL provides an
easy-to-use, high performance solution for 10BASE-T,
100BASE-TX, and 100BASE-FX applications.
The KS8721CL is also available in Lead-free (KSZ8721CL)
and Industrial Temperature (KS8721CLI) packages.
For additional information, contact your local Micrel Field
Application Engineer or salesperson.
HTTP://
www.micrel.com
Manchester Encoder
Manchester Decoder
4B/5B Encoder
4B/5B Decoder
Serial/Parallel
Parallel/Serial
Parallel/Serial
Serial/Parallel
Descrambler
Scrambler
Product Brief
KS8721CL
Controller
Registers
MII/RMII
Interface
Driver
LED
and
TXD3
TXD2
TXD1
TXD0
TXER
TXC
TXEN
CRS
COL
MDIO
MDC
RXD3
RXD2
RXD1
RXD0
RXER
RXDV
RXC
COL
FDX
SPD
LINK
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KSZ8721CL A2 Summary of contents
Page 1
Physical Layer Transceiver Description The KS8721CL is a 10BASE-T, 100BASE-TX, and 100BASE-FX physical layer transceiver providing MII/ RMII interfaces to MACs and switches. Using a unique mixed-signal design that extends signaling distance while reducing power consumption, the ...
Page 2
Features • Single chip 10BASE-T, 100BASE-TX, and 100BASE-FX physical layer solution • Fully compliant to IEEE802.3u standards • Low-power CMOS design, power consumption • Supports media independent interface (MII) and reduced MII (RMII) • Delivers robust operation (130 meters+) • ...