Credo launched its Bluebird 1.6T optical DSP this week, targeting the demands of AI infrastructure with a focus on low power, high bandwidth, and ultra-low latency. The chip enables 224Gbps per lane PAM4 transmission, supporting both 800G and 1.6T optical transceivers. By consuming less than 20W, Bluebird addresses a critical barrier in deploying 1.6T optics—excessive power dissipation that strains data center cooling and power delivery systems.
The DSP offers full DSP and Linear Receive Optics (LRO) variants to accommodate different networking architectures. With sub-40ns latency per direction, Bluebird is optimized for GPU-to-GPU communication in AI training and inference environments, reducing bottlenecks for large language models. Its telemetry and diagnostics suite improves link monitoring, system uptime, and failure isolation, while optional IEEE-compliant inner and outer FEC support enables fiber reaches up to 2 km and beyond.
Bluebird integrates dynamic optimization features across electrical and optical interfaces, allowing operators to adjust for either maximum link margin or minimal energy consumption. Credo is positioning Bluebird as a flexible building block for scale-up and scale-out AI networks, offering module partners a pathway to higher density and efficiency.
• Supports four or eight lanes of 224Gbps PAM4
• Available in DSP and LRO variants
• Sub-40ns latency per direction for GPU-to-GPU traffic
• Power consumption under 20W for 1.6T modules
• Telemetry and diagnostics for reliability and uptime
• Optional inner/outer FEC for fiber reaches of 500 m and 2 km+
“The 1.6T Bluebird Optical DSP is engineered to deliver greater flexibility than existing solutions, enabling broader application support,” said Chris Collins, VP of Optical Sales and Product Marketing at Credo.
🌐 Analysis: Credo’s move into 1.6T optical DSPs puts it in direct competition with Marvell, Broadcom, and Inphi (now part of Marvell), all of whom are racing to enable efficient 224G per lane optics. With AI factories scaling GPU interconnect bandwidth demands, the sub-20W power envelope and sub-40ns latency make Bluebird particularly relevant. Hyperscalers under pressure to reduce data center power consumption may view this as a viable alternative to higher-power designs.
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