BCM8422
®
4-CHANNEL 1/2/4G FIBRE CHANNEL INTELLIGENT LOOP CIRCUIT/
DUAL RETIMER/REPEATER WITH EYEOPENER®
BCM8422 Diagram
• 4-channel loop circuit to configure fibre channel hard
disk drives in FC-AL configurations
Dual-channel retimer/repeater with EyeOpener
exceeding fibre channel signalling specifications
Multi-rate support for new and legacy systems
Active Signal Integrity (Active-SI) monitors physical
layer and Active Link Integrity (Active-LI) monitors
link-layer performance
Programmable transmit output levels and receive LOS
detection
High-performance receive equalization and
programmable transmit pre-emphasis
Per channel link LED drivers for valid fibre channel
frames and speed detection
Developed using advanced 0.13u CMOS process
technology
Low-cost back end solution for fibre channel disk drive
arrays
Guarantees jitter and bit-error-rate performance on
optical and fiber links
Supports legacy 1.0625G and 2.125G applications and
new 4.25G data rates off a single reference clock
frequency
On-chip intelligent diagnostics provides insight to the
signal quality with detection and recovery mechanisms
on each high-speed link
Optimizes channel performance for lower power and
signal detection through on-chip 2-wire control
interface
Transmits and receives over long distances of copper
cables or backplanes with 16 levels of programmable
pre-emphasis
Provides visual indications on PCBs for link status and
1.0625G, 2.125G, or 4.25G data rate transmissions
Low power design of ~1.5W with small footprint
package in a 13 mm x 13 mm BGA, with 1 mm ball pitch
FEATURES SUMMARY OF BENEFITS
BCM8422
Loop 2
Loop 1
Host 1
Host 2
RDN/P0
RDN/P1
RDN/P2
RDN/P3
TDN/P0
TDN/P1
TDN/P2
TDN/P3
BCM8422
Dual Eye-
Opener Mode
4-Channel Loop
Circuit