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LAN8808D Datasheet(PDF) 8 Page - Microchip Technology

No. de pieza LAN8808D
Descripción Electrónicos  4-Port Gigabit Ethernet Transceiver with QSGMII Support
PDF  80 Pages
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Fabricante Electrónico  MICROCHIP [Microchip Technology]
Página de inicio  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

LAN8808D Datasheet(HTML) 8 Page - Microchip Technology

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LAN8808D
DS00005833C-page 8
© 2026 Microchip Technology Inc. and its subsidiaries
2.0
INTRODUCTION
2.1
General Description
The LAN8808D is a low-power, quad-port triple-speed (10BASE-T/100BASE-TX/1000BASE-T) Ethernet physical layer
transceiver (PHY) that supports transmission and reception of data on standard CAT-5, as well as CAT-5e and CAT-6,
Unshielded Twisted Pair (UTP) cables.
The LAN8808D supports industry-standard QSGMII (Quad Serial Gigabit Media Independent Interface) providing chip-
to-chip connection to four Gigabit Ethernet MACs using a single serialized link (differential pair) in each direction.
The LAN8808D reduces board cost and simplifies board layout by using on-chip termination resistors for the line-facing
differential pairs.
The LAN8808D offers diagnostic features to facilitate system bring-up and debugging in production testing and in prod-
uct deployment. The LinkMD TDR-based cable diagnostic identifies faulty copper cabling. Integrated loopback functions
verify analog and digital data paths.
The LAN8808D is available in a 100-pin, RoHS Compliant VQFN package with commercial (0
C to +70C) and industrial
(-40
C to +85C) temperature ranges. An internal block diagram of the LAN8808D is shown in Figure 2-1.
FIGURE 2-1:
INTERNAL BLOCK DIAGRAM
QSGMII
Interface
MDIO
Ethernet Media
Interface Port 0
GMII
GPHY
Hard Macro
Tx/Rx Rate
Adaptation
FIFOs
TBI
Ethernet Media
Interface Port 1
GMII
GPHY
Hard Macro
Tx/Rx Rate
Adaptation
FIFOs
TBI
Ethernet Media
Interface Port 2
GMII
GPHY
Hard Macro
Tx/Rx Rate
Adaptation
FIFOs
TBI
Ethernet Media
Interface Port 3
GMII
GPHY
Hard Macro
Tx/Rx Rate
Adaptation
FIFOs
TBI
Chip
Common
Registers
PCS1G
LEDs
PCS1G
LEDs
PCS1G
LEDs
PCS1G
LEDs
8 LEDs
4 Tx SOF
4 Rx SOF
Analog
Common Macro
Digital Common
GMII
GMII
GMII
GMII
Customer
Temp Monitor
25M Ref Clk
Reset
125M Ref Clk
LAN8808D



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