The MAX4890/MAX4891/MAX4892 high-speed analog switches meet the needs of 10/100/1000 Base-T applications.
The MAX4890, MAX4891, and MAX4892 are high‑speed analog switches designed for 10/100/1000 Base‑T Ethernet LAN applications. They route signals from two interface transformers to a single Ethernet PHY, simplifying docking‑station designs and supporting board‑level redundancy.
Key features include ultra‑low on‑resistance (4 Ω typ, 6.5 Ω max), ultra‑low on‑capacitance (6.5 pF typ), built‑in LED switches (one for MAX4891, three for MAX4892), and space‑saving 32‑lead and 36‑lead TQFN packages. The devices operate from –40 °C to +85 °C with a supply voltage of 3.0 V to 3.6 V.
| On‑Resistance (RON) typical | 4 Ω |
|---|---|
| On‑Capacitance (CON) typical | 6.5 pF |
| Quiescent Supply Current maximum | 450 µA |
| Operating Temperature Range | -40 °C to +85 °C |
| Supply‑Voltage Range | 3.0 V to 3.6 V |
| Package Options | 32‑lead TQFN, 36‑lead TQFN |
The devices operate with a supply voltage from 3.0 V to 3.6 V.
The MAX4892 includes three built‑in LED switches.
They are specified to operate from –40 °C up to +85 °C.
Typical on‑resistance is 4 Ω.