BCM8120 Datasheet, PDF (2/2 Pages) Broadcom Corporation. – BCM8120

BCM8120 OVERVIEW
RESET
CLK16IP
CLK16IN
DI0P
DI0N
LVDS Parallel
Input Bus
DI15P
DI15N
SELFECB
REF155EN
REFCLKP
REFCLKN
LVPECL
Reference Clock
IFSEL
VCP
VCN
FIFO
Control
Write
Pointer
Output
Retime
Read
Pointer
10/10.7 GHz
CMU
DIVIDE-BY-16
OVP
CML
Serial Outputs
TSDP
TSDN
TSCKP
TSCKN
RB_LD
LVDS
Reference Clock
CLK16OP
CLK16ON
LCKDET
The BCM8120 is a fully integrated multi-rate SONET/SDH
transmitter operating at OC-192/STM-64 (9.953 Gbps) and two
FEC (Forward Error Correction) data rates (10.664 and 10.709
Gbps) with serializer, and CMU. The low-jitter LVDS interface
and the onboard low-jitter PLL meets Optical Internetworking
Forum (OIF), IEEE 802.3ae, Telcordia, ANSI, and ITU-T jitter
standards.
The BCM8120 reference clock input frequency is user-selectable
to the line rate divided by either 16 or 64. A 10-word FIFO serves
to decouple the parallel input timing domain from the serial
output timing domain. The BCM8120 provides a CML serial
output clock to retime the data at the optical interface.
The BCM8120 can be powered with a single 1.8V supply or dual
1.8/3.3V supply without any special power supply sequencing
requirements.
The major transmitter functions are:
• Configurable multi-rate CMU and data rates
• CML transmit serial data output
• 16-bit parallel LVDS input
• Selectable reference clock frequencies
• Parallel-to-serial conversion
• Elastic buffering FIFO with overflow indicator
• Lock detect
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