Datasheet Microchip KSZ8721

KS8721B/BT
2.5V 10/100BasTX/FX MII Physical Layer Transceiver Rev. 2.3 General Description Features Operating at 2.5 volts to meet low voltage and low power
requirements, the KS8721B/BT is a 10BaseT/100BaseTX/FX
Physical Layer Transceiver, which provides an MII to transmit
and receive data. It contains the 10BaseT Physical Medium
Attachment (PMA), Physical Medium Dependent (PMD), and
Physical Coding Sub-layer (PCS) functions. Moreover, the
KS8721B/BT has on-chip 10BaseT output п¬Ѓltering, which
eliminates the need for external п¬Ѓlters and allows a single
set of line magnetics to be used to meet requirements for
both 100BaseTX and 10BaseT.
The KS8721B/BT can automatically configure itself for 100
or 10 Mbps and full or half duplex operation, using on-chip
Auto-Negotiation algorithm. It is an ideal choice of physical
layer transceiver for 100BaseTX/10BaseT applications.
Data sheets and support documentation can be found on
Micrel’s web site at www.micrel.com. Single chip 100BaseTX/100BaseFX/10BaseT physical
layer solution 2.5V CMOS design, power consumption …

KS8721BL/SL
3.3V Single Power Supply 10/100BASE-TX/FX
MII Physical Layer Transceiver
Rev. 1.3 General Description Features Operating with a 2.5V core to meet low-voltage and lowpower requirements, the KS8721BL and KS8721SL are
10BASE-T/100BASE-TX/FX Physical Layer Transceivers
that use MII and RMII interfaces to transmit and receive
data. They contain 10BASE-T Physical Medium
Attachment (PMA), Physical Medium Dependent (PMD),
and Physical Coding Sub-layer (PCS) functions. The
KS8721BL/SL also have on-chip 10BASE-T output
filtering. This eliminates the need for external filters and
allows a single set of line magnetics to be used to meet
requirements for both 100BASE-TX and 10BASE-T.
The KS8721BL/SL automatically configure themselves
for 100 or 10Mbps and full-or half-duplex operation,
using an on-chip auto-negotiation algorithm. They are the
ideal physical layer transceiver for 100BASE-TX/
10BASE-T applications. Single chip 100BASE-TX/100BASE-FX/10BASE-T
physical layer solution 2.5V CMOS design; 2.5/3.3V tolerance on I/O 3.3V single power supply with built-in voltage
regulator; Power consumption …

KS8721CL Micrel, Inc. KS8721CL
3.3V Single Power Supply 10/100BASE-TX/FX MII Physical Layer Transceiver Rev. 1.2 General Description Features The KS8721CL is a 10BASE-T, 100BASE-TX, and 100BASEFX 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.
The KS8721CL contains 10BASE-T physical medium attachment (PMA), physical medium dependent (PMD), and physical coding sub-layer (PCS) functions. It also has on-chip
10BASE-T output filtering. This eliminates the need for
external filters and allows a single set of line magnetics to be
used to meet requirements for both 100BASE-TX and
10BASE-T.
The KS8721CL automatically configures itself for 100Mbps
or 10Mbps and full-or half-duplex operation, using an on-chip
auto-negotiation algorithm. It is the ideal physical layer
transceiver for 100BASE-TX/10BASE-T applications. Single chip 100BASE-TX/100BASE-FX/10BASE-T
physical layer solution 2.5V CMOS design; 2.5/3.3V tolerance on I/O 3.3V single power supply with built-in voltage regulator;
Power consumption …