MAX4543EPA

Analog Switches, Multiplexers, Demultiplexers Overview

The MAX4543EPA is a dual single-pole/single-throw (SPST) analog switch from the MAX4541–MAX4544 series, manufactured by Analog Devices Inc./Maxim Integrated. It operates on a single supply voltage ranging from +2.7V to +12V and features one normally open (NO) switch and one normally closed (NC) switch. The device provides a maximum on-resistance of 60Ω with a typical value of 33Ω at +5V. Key electrical parameters include a maximum turn-on time of 100ns, a maximum turn-off time of 75ns, and a maximum charge injection of 5pC. It supports a continuous current of ±10mA and offers low leakage currents of 100pA maximum. The component is housed in an 8-pin Plastic DIP package and is rated for an operating temperature range of -40°C to +85°C.

Analog Switches, Multiplexers, Demultiplexers Feature Summary

• Features mixed switch configurations with one normally open and one normally closed channel within a single package.
• Provides guaranteed break-before-make timing for the SPDT-capable configuration to prevent signal shorting.
• Operates with TTL/CMOS logic compatibility across the full specified supply voltage range.
• Delivers low power consumption suitable for battery-powered applications.

Analog Switches, Multiplexers, Demultiplexers Applications

• Battery-operated systems requiring low power dissipation
• Sample-and-hold circuits
• Audio and video switching
• Heads-up displays
• +3V/+5V DACs and ADCs

Analog Switches, Multiplexers, Demultiplexers Procurement Notes

Verify the specific suffix 'EPA' to confirm the 8-pin Plastic DIP package and the industrial temperature grade (-40°C to +85°C). Ensure the ordering code matches the exact manufacturer part number to avoid confusion with other variants in the MAX454x family that may differ in pinout or electrical characteristics.

Analog Switches, Multiplexers, Demultiplexers Selection Notes

Select this component when a mixed NO/NC switch configuration is required in a dual-channel layout. It serves as a direct replacement for the MAX323/MAX324/MAX325 series due to pin compatibility. Consider the 60Ω maximum on-resistance and 100ns switching speed against application requirements before choosing over lower-resistance alternatives.

Analog Switches, Multiplexers, Demultiplexers Part Context

The MAX4543EPA belongs to the MAX4541–MAX4544 family of low-voltage, single-supply analog switches. While the MAX4541 contains two NO switches and the MAX4542 contains two NC switches, the MAX4543 uniquely combines one NO and one NC switch. This allows it to function as an SPDT switch or provide independent control over different signal polarities.

Analog Switches, Multiplexers, Demultiplexers Replacement Considerations

The MAX4543EPA is pin-compatible with the MAX323, MAX324, and MAX325. Designers replacing these legacy parts should verify that the on-resistance and switching speed specifications meet the circuit requirements.

Analog Switches, Multiplexers, Demultiplexers FAQ

What is the difference between the MAX4543 and MAX4544?

The MAX4543 contains two SPST switches configured as one Normally Open (NO) and one Normally Closed (NC), allowing it to function as an SPDT. The MAX4544 is a dedicated Single-Pole/Double-Throw (SPDT) switch.

Does the MAX4543 support break-before-make switching?

Yes, the MAX4543 guarantees break-before-make timing, which prevents the common terminal from connecting to both the NO and NC terminals simultaneously during switching transitions.

How does the MAX4543 handle logic levels at different supply voltages?

The device is TTL/CMOS compatible. When powered by +5V, it meets standard TTL levels. At other supply voltages (e.g., +3.3V or +12V), the logic inputs can be driven rail-to-rail to ensure proper operation.