PT4161LRS PCIe Gen4 x16 Retimer - High-Speed Signal Integrity Solution by Astera Labs
PT4161LRS: The Ultimate PCIe Gen4 x16 Retimer for Next-Gen Computing
In the era of hyperscale data centers and AI-driven workloads, signal integrity is paramount. The PT4161LRS from Astera Labs emerges as a game-changing PCI-Express Gen4 x16 Retimer designed to solve critical signal degradation challenges. This comprehensive guide explores why engineers worldwide are adopting this IC for mission-critical applications.
PT4161LRS: Technical Deep Dive
As a 354-FCCSP packaged retimer, the PT4161LRS delivers:
- PCIe Gen4 Compliance: Supports 16GT/s data rate per lane (256GT/s aggregate bandwidth)
- Advanced Equalization: CTLE/DFE compensation for 35dB+ channel loss
- Low Latency: <5ns added latency for real-time systems
- Power Efficiency: <3W typical power consumption with advanced power gating
Industry-Leading Signal Enhancement
The PT4161LRS implements Astera Labs' proprietary Leo Memory Connectivity technology featuring:
- Adaptive RX/TX equalization
- Jitter cleaning with <0.5UI total jitter
- BER <1E-15 error correction
Why Designers Choose PT4161LRS
Comparative Advantages Over Competitors:
| Feature | PT4161LRS | Alternative A | Alternative B |
|---|---|---|---|
| Lane Width | x16 | x8 | x4 |
| Power Efficiency | 2.8W | 3.5W | 4.2W |
| Package Size | 22.8x8.9mm | 25x10mm | 30x15mm |
Real-World Implementation Scenarios
Case Study 1: In a Tier 1 cloud provider's data center, PT4161LRS enabled 30% longer trace lengths between GPUs and switches while maintaining BER below 1E-15.
Case Study 2: An autonomous vehicle manufacturer achieved 40% signal integrity improvement in their AI inference cluster using PT4161LRS retimers.
Design Considerations
For optimal performance:
- Implement recommended PCB stackup (6-layer minimum)
- Follow Astera's thermal guidelines ( JA = 15 C/W)
- Utilize provided IBIS-AMI models for channel simulation
Future-Proof Architecture
The PT4161LRS is software-upgradable to support emerging standards like CXL 2.0 and PCIe Gen5 through firmware updates, protecting your investment.
Purchasing Information
Available through authorized distributors with:
- Industrial temperature range (-40 C to +105 C)
- 10K unit pricing at $28.75/unit
- Evaluation kits (PT4161-EVAL-KIT) for $1,499
For volume pricing and technical support, contact Astera Labs' global sales team.