Datasheet

KSZ8873MLL/FLL/RLL
DS00002348A-page 4  2017 Microchip Technology Inc.
1.0 INTRODUCTION
1.1 General Description
The KSZ8873MLL/FLL/RLL are highly integrated 3-port switch-on-a-chip ICs in the industry’s smallest footprint. They
are designed to enable a new generation of low port count, cost-sensitive, and power efficient 10/100 Mbps switch sys-
tems. Low power consumption, advanced power management, and sophisticated QoS features (e.g., IPv6 priority clas-
sification support) make these devices ideal for IPTV, IP-STB, VoIP, automotive, and industrial applications.
The KSZ8873 family is designed to support the GREEN requirement in today’s switch systems. Advanced power man-
agement schemes include hardware power down, software power down, per port power down, and the energy detect
mode that shuts downs the transceiver when a port is idle.
KSZ8873MLL/FLL/RLL also offer a bypass mode. In this mode, the processor connected to the switch through the MII
interface can be shut down without impacting the normal switch operation.
The configurations provided by the KSZ8873 family enables the flexibility to meet requirements of different applications:
• KSZ8873MLL: Two 10/100BASE-T/TX transceivers and one MII interface.
• KSZ8873RLL: Two 10/100BASE-T/TX transceivers and one RMII interface.
• KSZ8873FLL: Two 100BASE-FX transceivers and one MII interface.
The devices are available in RoHS-compliant 64-pin LQFP packages. Industrial-grade and qualified AEC-Q100 Auto-
motive-grade versions are also available.
FIGURE 1-1: SYSTEM BLOCK DIAGRAM
1K LOOK-UP
ENGINE
QUEUE
MANAGEMENT
BUFFER
MANAGEMENT
FRAME
BUFFERS
MIB
COUNTERS
EEPROM
INTERFACE
YTIROIRP ,GNIGGAT NALV ,LORTNOC WOLF ,OFIF
10/100
MAC 1
10/100
MAC 2
10/100
MAC 3
10/100
T/TX/FX
PHY 1
10/100
T/TX/FX
PHY 2
HP AUTO
MDIX
HP AUTO
MDIX
MII/SNI
SPI
SPI
CONTROL
REGISTERS
MIIM
SMI
STRAP IN
CONFIGURATION
LED
DRIVERS
I2C
P1 LED[1:0]
P2 LED[1:0]