BOARDCOM BCM8220

BCM8220
®
2.488/2.667 GBPS ULTRA LOW POWER SONET/SDH TRANSCEIVER
FEATURES
SUMMARY OF BENEFITS
• OC-48/STM-16 SONET/SDH transceiver
• Selectable full-duplex transmission between standard rate of
• Ultra low power consumption eliminates external heat sinks,
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
• 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
• 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.
APPLICATIONS
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
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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
4
4
OTX
ORX
2.488 or 2.667 (FEC) G[bs
ORX
OTX
BCM8220
622.08 or
666.84 Mbps
BCM8220
4
622.08 or
666.84 Mbps
4
Network Interface
Processor
BCM8220 Application Block Diagram
Network Interface
Processor
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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.
OVERVIEW
FIFO
Control
RESET
OVF
TCK4IP
TCK4IN
Write
Pointer
Input Register
DI3P
DI3N
4:1 Parallelto-Serial
4 x 9 FIFO
DI0P
DI0N
Output
Retime
REFCKP
2.488/2.666
GHz PLL
REFCKN
REF155EN
TXDN
M
U
X
Read
Pointer
SEL2P5G
TXDP
B
M
U
X
TXCKP
TXCKN
TCK4OP
TCK4ON
DIVIDE-BY-4
LCKDET_CMU
RTSYNC
CDR
SELRD1
DO0P
Output Register
M
U
X
1:4 Serialto-Parallel
RDIN1P
RDIN1N
RDIN2P
RDIN2N
DO0N
DO3P
DO3
LOSBDLYEN
CKSEL
KILLRXCLK
KILLRXDAT
DIVIDE-BY-4
M
U
X
LOSIB
LINELBB
SYSLBB
TSTLBB
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.
RCK4ON
LCKDET_CDR
LOSB
Loopback
Logic
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.
RCK4OP
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 ITUT 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