BCM8220
®
2.488/2.667 GBPS ULTRA LOW POWER SONET/SDH TRANSCEIVER
FEATURES
•
OC-48/STM-16 SONET/SDH transceiver
•
Selectable full-duplex transmission between standard rate of
2.488 Gbps or Forward Error Correction rate of 2.667 Gbps.
•
Single-chip, integrated solution containing multiplexer (Mux),
clock multiplication unit (CMU), demultiplexer (Demux), and
clock data recovery (CDR) functions.
•
4-bit, 622.08/666.84-MHz, LVDS system interface
SUMMARY OF BENEFITS
•
Ultra low power consumption eliminates external heat sinks,
fans for system airflow, and expensive high current power
supplies.
•
High integration reduces design cycle and time to market.
•
Features increased port density per board and system.
•
Selectable standard OC-48/STM-16 rate of 2.488 Gbps or
Forward Error Correction rate of 2.667 Gbps, allowing for
easy system configuration to maximize transmission
bandwidth and data availability.
•
Extensive diagnostic features provide easy system
troubleshooting.
•
Compliant with industry standards to reduce design cycle and
time to market.
•
CMOS-based device takes advantage of the most effective
silicon economy of scale.
•
Both line and system loopback modes
•
Additional diagnostic features include lock detect and loss of
signal.
•
Meets SONET/SDH jitter requirements
•
Low power dissipation of 550 mW typical
•
•
•
•
Operates at 1.8V
1.8V or 3.3V CMOS I/O interface
Standard CMOS fabrication process
Two packages offered:
•
100-pin QFP package, 14 mm
∞
14 mm
∞
1.4 mm
•
100-pin BGA package, 11 mm
∞
11 mm
∞
1.71 mm
APPLICATIONS
•
•
•
•
•
•
•
OC-48/STM-16 transmission Equipment
SONET/SDH optical modules
ADD/DROP multiplexers
Digital cross-connects
ATM switch backbones
Terabit and edge routers
DWDM systems
BCM8220 Application Block Diagram
Network Interface
Processor
OTX
ORX
622.08 or
666.84 Mbps
2.488 or 2.667 (FEC) G[bs
622.08 or
666.84 Mbps
ORX
OTX
4
4
Network Interface
Processor
4
4
BCM8220
BCM8220
OVERVIEW
RESET
TCK4IP
TCK4IN
FIFO
Control
Write
Pointer
OVF
4
x
9 FIFO
DI0P
4:1 Parallel-
to-Serial
Input Register
DI0N
Output
Retime
TXDP
B
TXDN
DI3P
DI3N
SEL2P5G
REFCKP
REFCKN
REF155EN
RTSYNC
RDIN1P
RDIN1N
RDIN2P
RDIN2N
SELRD1
LOSBDLYEN
CKSEL
KILLRXCLK
KILLRXDAT
LOSIB
LINELBB
SYSLBB
TSTLBB
Loop-
back
Logic
Read
Pointer
M
U
X
M
U
X
TXCKP
TXCKN
2.488/2.666
GHz PLL
DIVIDE-BY-4
TCK4OP
TCK4ON
LCKDET_CMU
DO0P
DO0N
Output Register
M
U
X
1:4 Serial-
to-Parallel
CDR
DO3P
DO3
DIVIDE-BY-4
M
U
X
RCK4OP
RCK4ON
LCKDET_CDR
LOSB
The BCM8220 FEC-capable (Forward Error Correction), SONET/SDH
transceiver is a fully integrated, SONET OC-48 (2.488/2.667 Gbps)
interface serialization/deserialization device with an integrated clock
multiplication unit (CMU) and integrated clock and data recovery (CDR)
circuit. Output frequency is selectable at 2.488 Gbps or 2.667 Gbps,
allowing use of the FEC capability.
On-chip clock synthesis is performed by the high-frequency, low-jitter,
phase-locked loop on the BCM8220 transceiver chip, allowing the use of
slower 77.76/155.52-MHz (83.35/166.71-MHz) external transmit clock
references.
Clock recovery is performed by synchronizing the on-chip VCO directly
to the incoming data stream. The low-jitter, LVDS interface guarantees
bit error compliance with the Telcordia GR-253-CORE, ANSI, and ITU-
T standards. The BCM8220 is packaged in a 14 x 14 mm, 100-pin LQFP
package or an 11 x 11 mm, 100-pin BGA package.
Transmitter functions include:
•
4-bit parallel input
•
Elastic buffering
•
2.488/2.666 GHz clock generation
•
Parallel-to-serial conversion
•
Serial differential data output
Receiver functions include:
•
2.488/2.666 Gbps differential data input
•
Clock and data recovery
•
Serial-to-parallel conversion
•
4-bit parallel output
Broadcom
®
, the pulse logo, and
Connecting everything
®
are trademarks of Broadcom Corporation and/
or its subsidiaries in the United States and certain other countries. All other trademarks mentioned are the
property of their respective owners.
®
BROADCOM CORPORATION
16215 Alton Parkway, P.O. Box 57013
Irvine, California 92619-7013
© 2004 by BROADCOM CORPORATION. All rights reserved.
8220-PB08-R
07/02/04
Phone: 949-450-8700
Fax: 949-450-8710
E-mail: info@broadcom.com
Web: www.broadcom.com
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