VITESSE
SEMICONDUCTOR CORPORATION
Advance Product Information
VSC7186
Features
• Four Complete Transceiver Functions in One IC
• Full Gigabit Ethernet (IEEE 802.3z) Compliance
• Pin-Compatible With Agilent HDMP-1686A
• 5-Volt Tolerant TTL Inputs
• Uses Reference Clock to Latch Tx Data
• 1/10
th
or 1/20
th
Baud Rate Recovered Clocks
• Common Local Loopback Control
Quad Transceiver
for Gigabit Ethernet
• Single Comma Detect Enable
• Cable Equalization in Receivers
• Automatic Lock-to-Reference
• JTAG Access Port
• 2kV ESD Protection on All Pins
• 3.3V Power Supply, 2.67 W Max Dissipation
• 208 pin, 23 mm BGA Packaging
General Description
The VSC7186 is a Quad Gigabit Ethernet Transceiver IC. Each of the four transmitters has a 10-bit wide
bus, running at 125 MHz, which accepts 8b/10b encoded transmit characters and serializes the data onto high
speed differential outputs at rates between 1.05 and 1.36 Gb/s. The transmit data must be synchronous to the
reference clock. Each receiver samples serial receive data, recovers the clock and data, deserializes it into 10-bit
receive characters, outputs a recovered clock and detects “Comma” characters. The VSC7186 contains on-chip
PLL circuitry for synthesis of the baud-rate transmit clock and extraction of the clocks from the received serial
streams.
VSC7186 Block Diagram (1 of 4 Channels)
RXi(0:9)
10
QD
Serial to
Q Parallel D
QD
0
Clock
Recovery
÷10
Unit
1
SI+
SI-
RCM
RCi1
RCi0
SYNi
SYNC
LOOP
Comma
Detect
SEL
÷10/
÷20
TXi(0:9)
10
DQ
Parallel
to Serial
DQ
SO+
SO-
RFC1
CAP0
CAP1
Clock
Multiply
Unit
x10
G52306-0, Rev. 2.0
3/27/00
VITESSE
SEMICONDUCTOR CORPORATION
741 Calle Plano, Camarillo, CA 93012 • 805/388-3700 • FAX: 805/987-5896
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