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Gigabit Ethernet Serializer/Deserializer (SERDES)
CS6590
BLOCK DIAGRAM
GENERAL DESCRIPTION
Century Semiconductor Inc.
FEATURES
USA:
4020 Moorpark Avenue Suite 115
San Jose, CA, 95117
Tel: 408-243-8388 Fax: 408-243-3188
Sales@century-semi.com
Sales@century-semi.com.tw
www.century-semi.com
Rev.0.2 February 2001
page 1 of 6
Century Semiconductor, Inc.
Taiwan:
No. 2, Industry East Rd. 3rd,
Science-Based Industrial Park, Hsin-Chu, Taiwan
Tel: 886-3-5784866 Fax: 886-3-5784349
CS6590 is a single chip serializer and deserializer
compliant to IEEE 802.3 PMA function for Gigabit
Ethernet applications. It accepts X3T11 compatible
10-bit interface. The serializer receives 8B/10B
encoded transmit symbol and pass it to parallel to
serial converter. The serial data stream at 1.25Gbps
are then passed to the transmit output buffer which
drives TX PECL differential outputs. The
deserializer accepts differential PECL input RX as
the input stream. The input serial stream is passed to
a clock recovery module.
The data stream is then retimed by the recovered
serial clock. The rechronized data is passed to the
serial to parallel converter and the COMMA detect
logic for frame alignment. A reference clock input of
125MHz is used to generate all internal timing using
on-chip frequency synthesizer.
IEEE 802.3z compliant PMA function for Gigabit
Ethernet
X3T11 10-bit interface
Differential PECL interface to PMD
On-chip frequency synthesizer using 125MHz ref-
erence clock input
On-chip clock recovery
CMOS low power design
Internal loopback
Single 3.3V supply
Available in 64-pin LQFP package
XMT INPUT
LATCH
PARALLEL
TO
SERIAL
DIFF
PECL
DRIVER
RCV OUTPUT
BUFFER
SERIAL
PARALLEL
DIFF
PECL
RECEIVER
COMMA
DETECT
CLOCK
RECOVERY
CLOCK SYNTH
REFERENCE
T[0-9]
REFCLK
R[0-9]
RCLK/
RCLKN
EWRAP
COMDET
ENCDET
TXP
TXN
RXP
RXN
TO
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