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MAX4950：Quad PCI Express Equalizer/Redriver

Ultra-Small Equalizer/Redriver Improves PCIe Signal Integrity Across Systems

The MAX4950 PCI Express (PCIe®) quad equalizer/redriver operates from a single +3.3V supply. This device improves signal integrity at the receiver through programmable input equalization and programmable redrive circuitry. The output circuitry reestablishes deemphasis lost on the board, compensating for circuit board loss. This device permits optimal placement of key PCIe components and longer runs of stripline, microstrip, or cable. The MAX4950 contains four identical buffers capable of equalizing differential signals at data rates up to 5GT/s, and features electrical idle and receiver detection on each channel. The MAX4950 is ideal for use with PCIe Gen I (2.5GT/s) and Gen II (5.0GT/s) data rates and features a power-saving mode. The MAX4950 is available in a small, lead-free, 42-pin (3.5mm x 9.0mm) TQFN package for optimal layout and minimal space requirements. The board traces are flow-through for ease of layout. The MAX4950 is specified over the 0°C to +70°C operating temperature range.

Key Features Single +3.3V Supply Operation Generation I (2.5GT/s) and Generation II (5.0GT/s) Capable Return Loss: ≥ 10dB (f ≤ 1.25GHz) ≥ 8dB (f ≤ 2.5GHz) Very Low Latency 280ps Propagation Delay Individual Lane Detection Low Lane-to-Lane Skew: ±50ps Total Jitter ≤ 35psP-P at BER = 10-12 Three-Level-Programmable Input Equalization Three-Level-Programmable Output Deemphasis On-Chip 50Ω Input/Output Terminations ±2kV Human Body Model (HBM) Protection on All Pins Space-Saving, 3.5mm x 9.0mm, TQFN Packaging

MAX4950: Typical Application Diagram Applications/Uses Communication Switchers Desktop Computers Industrial PCs Laptop Computers (for External Video Cards) Servers Storage Area Networks Test Equipment

DataSheet

Parametrics

Quality and Environmental Data

• MAX4950.pdf

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