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MAX4889B：2.5/5.0/8.0Gbps PCIe Passive Switch

High-Speed PCI Express Passive Switches Enable Gen II Switching with Low Insertion Loss and Superior Return Loss

The MAX4889B/MAX4889C high-speed passive switches route PCI Express® (PCIe) data between two possible destinations in desktop or notebook PCs. The MAX4889B/MAX4889C are quad double-pole/double-throw (4 x DPDT) switches ideal for switching four half lanes of PCIe data between two destinations. The MAX4889B/MAX4889C feature a single digital control input (SEL) to switch signal paths. The MAX4889C is intended for use in systems (e.g., SAS) where both the input and output are capacitively coupled, and provides a 10µA (typ) source current and a 60kΩ (typ) internal biasing resistor to GND at the _OUT_ terminals. The MAX4889B/MAX4889C are fully specified to operate from a single +3.3V (typ) power supply. Both devices are available in an industry-standard 3.5mm x 9.0mm, 42-pin TQFN package. These devices operate over the -40°C to +85°C extended temperature range.

Key Features Single +3.3V Power-Supply Voltage Support PCIe Gen I, Gen II, and Gen III Data Rates Supports SAS I, SAS II, and SAS 6.0Gbps (MAX4889C) Superior Return Loss Better than -22dB (typ) at 4.0GHz Excellent Return Loss Better than -1.2dB (typ) at 4.0GHz Small 3.5mm x 9.0mm, 42-Pin TQFN Package Industry-Standard Pinouts

MAX4889B, MAX4889C: Functional Diagram Applications/Uses Desktop PCs Notebook PCs Servers Video Graphics Cards—SLI® (Scaled Link Interface) and CrossFire™

DataSheet

Parametrics

Design kits & evaluation modules

• MAX4889BEVKIT

Quality and Environmental Data

• MAX4889B.pdf

Ordering Information