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224GBPS PER LANE OPTICAL DSP

Credo Bluebird Chip

BLUEBIRD

The Bluebird is a high-performance digital signal processor (DSP) based on 3nm CMOS technology and designed to enable 224Gbps per lane PAM4 data transmission for 1.6Tbps optical transceivers. Delivering industry-leading power efficiency and ultra-low latency, the Bluebird DSP is ideal for next-generation AI networks where high-bandwidth, low power and extreme reliability are critical.

The Bluebird DSP comprises four or eight lanes of 224Gb/s PAM4 to support high-density 800G, or high-capacity 1.6T optical transceivers, and includes a comprehensive suite of telemetry and performance optimization features. Available in full DSP and Linear Receive Optics (LRO) variants, the Bluebird DSP addresses a wide variety of networking architecture options for both scale-up and scale-out use cases. 

Credo Bluebird Block Diagram

Parameters

Host Side
224G PAM4
Line Side
224G PAM4
Operating Temp
0º to 70ºC
Process
3nm CMOS

Features

  • Retimer mode with host and line side at 200G
  • Symbol mux mode with host interface at 100G and line side at 200G
  • Optional IEEE-compliant Hamming (128, 120) inner FEC
  • Optional IEEE-compliant KP4 RS (544, 514) FEC
  • Powerful DSPs on optical line side and electrical host side deliver industry-leading sensitivity and BER performance, providing margin for high volume manufacturing tolerance
  • Line side receivers include non-linear cancellation and reflection cancellation, improving yield, link margin and reduced cost
  • Transmitters with integrated multi-tap FIR filters and non-linear cancellation, allowing precision optimization at both the module electrical connector and the optical interface
  • Under 40ns latency
  • Independent phase locked loops per channel support flexible breakout configurations
  • Full suite of test features simplifies lab bring-up, production testing and reduces time-to-market
  • On-chip crossbar
  • Low power dissipation enables higher rack utilization and lower thermal cooling requirements
  • Sold as bare die

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