The MAX4888/MAX4889 are high-speed passive switches used to route PCI Express data between two destinations. The MAX4888 is suitable for switching two half lanes of PCIe data, while the MAX4889 is suitable for switching four half lanes of PCIe data. They feature a single digital control input, support power supply voltage from 1.65V to 3.6V, and have low skew and low quiescent current.
The MAX4888 and MAX4889 are high‑speed passive PCI Express switches that route data between two or four destinations. The MAX4888 is a quad SPDT switch for two half‑lanes, while the MAX4889 is an octal SPDT switch for four half‑lanes. They are intended for desktop computers, servers, storage area networks, and laptops.
The datasheet details the devices' power‑supply range (1.65 V to 3.6 V), operating temperature (-40 °C to +85 °C), on‑resistance, switching times, and pin configurations for the 28‑pin and 42‑pin TQFN packages. Electrical characteristics, dynamic performance, and package dimensions are also provided.
| Power‑supply range (V+) | 1.65 V to 3.6 V |
|---|---|
| Operating temperature range | -40 °C to +85 °C |
| Typical on‑resistance (RON) | 0.06 Ω |
| Quiescent current | 120 pA (max) |
The devices operate from a single 1.65 V to 3.6 V power‑supply voltage.
The MAX4889 is available in a 42‑pin TQFN package.
Typical on‑resistance is about 0.06 Ω.
Both devices are specified up to +85 °C.