MAX4821EUP

Overview

The MAX4821EUP is an octal relay driver designed for +3.3V and +5V systems. It features eight independent N-channel outputs capable of driving loads between 2.3V and 5.5V with a peak current of 70mA. The device supports both serial and parallel interfaces, allowing flexible control configurations. It includes built-in kickback protection for inductive load safety. The component operates within a supply-independent three-state PWM input logic range and is housed in a 20-pin TSSOP-EP package.

Feature Summary

• Provides eight independent low-side N-channel outputs for direct relay or MOSFET driving
• Supports cascading capabilities to expand channel count in complex systems
• Integrates built-in kickback protection circuitry to safeguard against inductive voltage spikes
• Offers dual interface options including serial and parallel control modes

Applications

• Industrial automation control panels
• Automotive electronic modules
• Aerospace avionics systems

Procurement Notes

Verify the specific suffix (e.g., EUP vs EUP+) to confirm lead-free compliance and packaging type. Ensure the ordering code matches the required tape-and-reel or tube configuration. Cross-reference the manufacturer's latest datasheet to confirm pinout compatibility and thermal performance specifications before finalizing procurement orders.

Selection Notes

Select this component when multiple low-side switching channels are required from a single controller. It is suitable for applications needing isolated drive signals with minimal external components. Consider the 20-TSSOP-EP package for improved thermal dissipation compared to standard packages. Verify that the load voltage falls within the 2.3V to 5.5V range for optimal operation.

Part Context

This part belongs to the Maxim Integrated octal relay driver family, which provides high-density switching solutions. These drivers are engineered to simplify board layout by integrating multiple channels into a compact form factor. The series typically emphasizes reliability in harsh environments, making it a common choice for robust industrial and automotive control architectures requiring efficient power management.

Replacement Considerations

The MAX4820EUP is a documented substitute within the same product family. Verify interface compatibility and output current ratings when substituting. Ensure the replacement part meets the same thermal and voltage specifications required by the original design constraints.