MAX4890ETJ+

Analog Switches - Special Purpose Overview

The MAX4890ETJ+ is a high-speed analog switch IC designed for Gigabit Ethernet (10/100/1000 Base-T) and LVDS/LVPECL signal routing. It features four pairs of DPDT switches within a 32-pin, 5mm x 5mm TQFN package. The device operates on a single +3.0V to +3.6V supply with a maximum quiescent current of 450µA. Key electrical parameters include a typical on-resistance of 4Ω (max 6.5Ω), ultra-low on-capacitance of 8pF (typ), and a -3dB bandwidth of 650MHz. It provides ±15kV ESD protection per MIL-STD-883 Method 3015 and functions over an industrial temperature range of -40°C to +85°C.

Analog Switches - Special Purpose Feature Summary

• Enhanced electrostatic discharge protection rated at ±15kV per MIL-STD-883 Method 3015.
• Ultra-low on-capacitance and low on-resistance for minimal insertion loss and wide bandwidth.
• Optimized pinout configuration facilitating direct interface with Ethernet transformers and PHYs.
• Bidirectional switching architecture supporting differential signal paths.

Analog Switches - Special Purpose Applications

• Notebook computers and docking stations
• Servers and routers with Ethernet interfaces
• SONET/SDH signal routing
• T3/E3 redundancy protection

Analog Switches - Special Purpose Procurement Notes

Verify the component designation against official manufacturer documentation to confirm the specific suffix and lead-free status. Ensure that the procurement source provides valid traceability data consistent with Analog Devices or Maxim Integrated standards. Cross-reference the part number with authorized distributor catalogs to validate authenticity before acquisition.

Analog Switches - Special Purpose Selection Notes

Select this component when designing systems requiring robust ESD protection for external network interfaces. The device is suitable for applications needing low signal distortion in Gigabit Ethernet environments. Consider the 32-pin TQFN footprint during layout planning to ensure adequate thermal dissipation and impedance control for high-frequency performance.

Analog Switches - Special Purpose Part Context

This device belongs to the MAX4890E/MAX4892E family of LAN switches. It serves as a pin-for-pin equivalent to the non-E variant, offering improved ESD resilience while maintaining identical functional characteristics. The ETJ+ suffix indicates the specific 32-pin TQFN package configuration with exposed pad and lead-free construction.

Analog Switches - Special Purpose Replacement Considerations

The MAX4890E is a confirmed functional substitute. Verify that the replacement maintains the required ESD protection levels and package dimensions for the target application.