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S2066
S2066
QUAD GIGABIT ETHERNET TRANSCEIVER
October 13, 2000 / Revision C
DEVICE
SPECIFICATION
FEATURES
Functionally compliant with IEEE 802.3z Gigabit
Ethernet Applications
1250 MHz (Gigabit Ethernet) operating rate
- 1/2 Rate Operation
Quad Transmitter incorporating phase-locked
loop (PLL) clock synthesis from low speed
reference
Quad Receiver PLL provides clock and data
recovery
Internally series terminated TTL outputs
Low-jitter serial PECL interface
Local Loopback
Interfaces with coax, twinax, or fiber optics
Single +3.3V supply, 2.3 W Power dissipation
Compact 23mm x 23mm 208 TBGA package
APPLICATIONS
High-speed data communications
Ethernet Backbones
Multi-port Gigabit Ethernet Cards
Switched networks
Data broadcast environments
GENERAL DESCRIPTION
The S2066 quad transmitter and receiver chip is de-
signed to provide four channels of high-speed serial
data transmission over fiber optic or copper interfaces
conforming to the requirements of the IEEE 802.3z
Gigabit Ethernet specification. The chip runs at
1250.0 Mbit/s serial data rate with an associated 10-
bit parallel data word. The chip provides four separate
transceivers which can be operated individually at
slightly different frequencies.
Each bi-directional channel provides parallel to serial
and serial to parallel conversion, clock generation
and recovery, and framing. The on-chip transmit PLL
synthesizes the high-speed clock from a low-speed
reference. The on-chip quad receive PLL is used for
clock recovery and data re-timing on the four inde-
pendent data inputs. The transmitter and receiver
each support differential PECL-compatible I/O for
copper or fiber optic component interfaces and pro-
vide excellent signal integrity. Local loopback mode
allows for system diagnostics. The chip requires a
3.3V power supply and dissipates approximately 2.3
watts.
Figure 1 shows the use of the S2064 and S2066 in a
Gigabit Ethernet application. Figure 2 summarizes the
input/output signals of the device. Figures 3 and 4
show the transmit and receive block diagrams, re-
spectively.
Figure 1. Typical Quad Gigabit Ethernet Application
MAC
(ASIC)
S2064
QUAD
GIGABIT
ETHERNET
INTERFACE
MAC
(ASIC)
MAC
(ASIC)
MAC
(ASIC)
TO SERIAL BACKPLANE
S2066
GE INTERFACE
SERIAL BP DRIVER