MAX4634EUB+

Analog Switches, Multiplexers, Demultiplexers Overview

The MAX4634EUB+ is a fast, low-voltage, 4-channel CMOS analog multiplexer manufactured by Analog Devices Inc./Maxim Integrated. It operates from a single +1.8V to +5.5V supply and features a maximum on-resistance (RON) of 4Ω at +25°C with a 5V supply. The device provides RON matching between channels of 0.3Ω (max) and RON flatness of 1Ω (max). It handles V+ to GND analog signals with an off-leakage current of only 0.1nA (max) at +25°C. Switching times are 18ns for turn-on and 11ns for turn-off. The component is housed in a 10-pin μMAX package and supports an operating temperature range of -40°C to +85°C.

Analog Switches, Multiplexers, Demultiplexers Feature Summary

• Guaranteed low on-resistance with tight channel-to-channel matching and flatness specifications over the signal range.
• Ultra-low off-leakage current ensuring minimal signal interference when switches are in the disabled state.
• TTL/CMOS-logic compatible digital inputs allowing direct interfacing with standard logic families across the voltage range.
• High off-isolation and low crosstalk characteristics suitable for precision audio and video signal routing applications.

Analog Switches, Multiplexers, Demultiplexers Applications

• Battery-operated equipment requiring low power consumption
• Audio and video signal routing systems
• Low-voltage data-acquisition systems
• Sample-and-hold circuits
• Communications circuits

Analog Switches, Multiplexers, Demultiplexers Procurement Notes

Verify that the ordering suffix matches the required package type, as the EUB suffix specifically denotes the 10-pin μMAX package. Confirm RoHS compliance status if environmental regulations apply to your manufacturing process. Ensure the supplier provides valid traceability documentation for the Analog Devices/Maxim Integrated origin. Check for any specific handling requirements related to electrostatic discharge during storage and assembly.

Analog Switches, Multiplexers, Demultiplexers Selection Notes

Select this component when a single-supply operation between 1.8V and 5.5V is required alongside low on-resistance. Consider the 10-pin μMAX package constraints regarding board space and thermal dissipation compared to the TDFN alternative. Evaluate the 4Ω maximum on-resistance against your signal integrity requirements, particularly for high-current analog paths. Verify that the TTL/CMOS logic thresholds align with your system's control voltage levels.

Analog Switches, Multiplexers, Demultiplexers Part Context

The MAX4634 belongs to the Maxim Integrated family of fast, low-voltage analog multiplexers designed for portable and battery-powered applications. It serves as a compact solution for switching multiple analog signals within a limited footprint. The μMAX package variant offers a small form factor suitable for dense PCB layouts where space is a critical constraint for consumer electronics and industrial instrumentation.

Analog Switches, Multiplexers, Demultiplexers Replacement Considerations

The MAX4634ETB is a pin-compatible alternative featuring a 10-pin TDFN-EP package instead of the μMAX format. Designers must verify that the thermal pad connection requirements of the TDFN package can be accommodated by the existing PCB land pattern without redesigning the layout.

Analog Switches, Multiplexers, Demultiplexers FAQ

How does the on-resistance vary with supply voltage?

The on-resistance increases as the supply voltage decreases. At +5V, the typical on-resistance is 2.35Ω, while at +3V, it rises to 4.5Ω. At the minimum operating voltage of +1.8V, the typical on-resistance reaches 30Ω.

What is the function of the EN pin?

The EN pin is the enable logic input. Driving EN low disables all switch channels, placing all four inputs and the common terminal into a high-impedance state. If the disable feature is not needed, EN should be connected to V+.

Can the MAX4634 handle analog signals below ground?

No, the analog signal range is specified from GND to V+. Signals exceeding these limits are clamped by internal diodes, which may cause forward current flow if not properly limited.