BCM5208 ETC, BCM5208 Datasheet
BCM5208
Manufacturer Part Number
BCM5208
Description
10/100 BASE-TX QUAD TRANSCEIVER
Manufacturer
ETC
Datasheet
1.BCM5208.pdf
(2 pages)
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BCM5208 10/100BASE-TX QUAD- ™ TRANSCEIVER
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The Broadcom
T Transceiver that contains four 10BASE-T/100-
BASE-TX transceivers
10BASE-T/100BASE-TX/FX IEEE 802.3u-compliant
Full-duplex Support in All Modes
IEEE 802.3u-compliant Auto-Negotiation
Media Independent Interface (MII) for Each Port
Shared MII Serial Management Interface
Fully-integrated Digital Adaptive Equalizers
125 MHz Clock Generator and Timing Recovery
Integrated Multimode Transmit Wave Shaping
Integrated Baseline Wander Correction
Carrier Integrity Monitor on Each Port
Port Switching for Multisegment Repeaters
MII Repeater Mode Support in All Modes
LED Status Pins
Loop-back Mode for Diagnostics
IEEE 1149.1 (JTAG) Support
3.3V Power Supply
208-Pin PQFP Package
B C M 5 2 0 8
®
BCM5208 is a Quad- 10/100BASE-
F E A T U R E S
24-Port 10/100BASE-T Ethernet Switch Example
10/100BASE-TX
10/100BASE-TX
BCM5208
BCM5208
Transceiver
Transceiver
QUAD-
QUAD-
TM
TM
PRODUCT
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Fully-integrated TX/FX Quad PHY Transceiver (MII
to TX Magnetics/FX Optics)
• Increases system port density
• Decreases system cost per port
• Simplifies system and board design
• Reduces power consumption
On-chip Multimode Transmit Wave Shaping
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Flexible Ethernet PHY Solution:
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Digital Adaptive Equalization and Clock Recovery
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MAC
MAC
MAC
MAC
MAC
MAC
S U M M A R Y
MAC
MAC
Eliminates need for external filters
Minimizes EMI
10BASE-T, 100BASE-TX or 100BASE-FX full-
duplex
Suited for both Ethernet switch and repeater products
Increases SNR by 3dB over ideal analog equalizers
Robust performance in harsh noise environments and
over sub-standard cable
Immune to on-chip noise and crosstalk
Insensitive to variations in process, temperature
and voltage
Brief
BCM5208
Switching
Engine
O F
B E N E F I T S
Switch Module
MP
Logic
Memory
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BCM5208 Summary of contents
Page 1
... BCM5208 10/100BASE-TX QUAD- ™ TRANSCEIVER • ® The Broadcom BCM5208 is a Quad- 10/100BASE- T Transceiver that contains four 10BASE-T/100- BASE-TX transceivers • 10BASE-T/100BASE-TX/FX IEEE 802.3u-compliant • Full-duplex Support in All Modes • IEEE 802.3u-compliant Auto-Negotiation • ...
Page 2
... UTP mode or fiber optic transmitter/receiver components for FX modes). In repeater mode, the MII ports may be bussed with other BCM5208 devices. Port multiplexing logic also allows the BCM5208 to be optimized for multisegment repeater configurations. ...