博通BCM8156多速10G收发方案

博通(Broadcom)公司的BCM8156是MSA兼容的多速率低功耗SONET/
SDH/10GbE/光通路/FEC收发器,工作速率包括有9.953Gbps, 10.3125 bps, 10.519Gbps, 10.664Gbps, 10.709Gbps, 11.095Gbps, 11.318Gbps或11.352Gbps.内核工作电压1.0V,功耗650mW,可用于OC-192/STM-64/10GbE/FEC发送设备,ADD/DROP复接器,数字交叉连接,ATM交换骨干网,兆兆位和边沿路由器以及基于多端口的XFP设计.本文介绍了BCM8156的主要特性,方框图和主要优势以及应用.

BCM8156 Multirate Low-Power 10-Gbps XFI TO SFI-4.1 Transceiver
The BCM8156 is a fully integrated MSA-compatible multirate SONET/
SDH/10-GbE/Fibre-Channel/FEC transceiver operating at 9.953 Gbps, 10.3125 Gbps, 10.519 Gbps, 10.664 Gbps, 10.709 Gbps, 11.095 Gbps, 11.318 Gbps, or 11.352 Gbps. On-chip clock synthesis is performed by the high-frequency, low-jitter PLL, allowing the use of a low-frequency reference clock selectable to the line rate divided by either 16 or 64. The 10G TX clock phase is adjustable for clocked driver applications. An onchip
phase detector and charge pump plus external VCXO implement a cleanup PLL. The cleanup PLL can be used to attenuate jitter on the CDR recovered clock for loop timing applications or to provide a low-jitter reference clock from a noisy system clock. Any SONET timing mode may be configured with the new BCM8156 timing architecture, making the timing mode and cleanup functions user-selectable in the field rather than during manufacturing, therefore, simplifying engineering and manufacturing requirements.
New features added to the BCM8156 include:
• PRBS generator/checker for BIST
• 10G RX equalization for ISI compensation
• 10G TX preemphasis
• BSC interface (compatible with Philips I2C standard) or optional SPI interface
The low-jitter LVDS interface guarantees compliance with the bit error rate requirements of the Telcordia (formerly Bellcore), ANSI, and ITUT standards. The BCM8156 is offered in two different packages:
1. 15 mm x 15 mm, 301-pin BGA compatible with the BCM8152 (0.8- mm ball pitch)
2. 15 mm x 15 mm, 196-pin BGA (1-mm ball pitch)



图1. BCM8156方框图
主要特性:
Fully integrated multirate CDR, DEMUX, MUX, CMU
300-pin Multisource Agreement (MSA) compatible
Compliant to ITU GR-253, XFP, and SFP+ specifications
16-bit LVDS interface compliant to Optical Internetworking Forum (OIF) SFI-4
RX equalization for ISI compensation
Limiting amplifier
RX phase adjustment
10G serial TX preemphasis
PRBS generator/checker for built-in self-test (BIST)
Data rates from 9.95 Gbps to 11.352 Gbps
Line and system loopback modes
Receiver and transmitter serial data polarity inversion
LVDS polarity inversion and bit order reversal
Analog loss-of-signal output (ALOSB) and loss-of-signal input (LOSIB)
CMU and CDR lock detect
FIFO overflow alarm
Reference clock: 1/16 or 1/64 of the line data rate
Selectable RX clock and RX data squelch
Selectable timing modes/cleanup are field configurable
Internal phase detector and charge pump for cleanup phaselocked loop (PLL) (external VCXO required)
Broadcom Serial Control (BSC) interface compatible with Philips® I2C standard
Optional SPI interface
Core voltage, 1V
Low-power: 650 mW
主要优势:
Compliant to OIF, Telcordia®, ITU-T, XFI specification, and IEEE 802.3ae standards
Fault isolation with loopbacks, pattern generator, and checker
Reduces design cycle and time-to-market
High-level of integration allows for higher port density solutions.
Lowest power SFI-4 to 10G serial transceiver
Standard CMOS 65-nm fabrication process
应用:
OC-192/STM-64/10-GbE/FEC transmission equipment
ADD/DROP multiplexers
Digital cross-connects
ATM switch backbone
Terabit and edge routers
Multi-port XFP-based designs