MCP73842T-840I/UN

Overview

The MCP73842T-840I/UN is a single-channel charge management controller designed for lithium-ion and lithium-polymer battery systems. It supports dual-cell configurations with an output voltage of 8.4 V and a maximum output current of 10 mA. The device operates within a supply voltage range of 4.5 V to 12 V and is housed in a 10-pin MSOP package.

Feature Summary

• Integrated charge safety timer for enhanced protection
• Temperature monitoring capability for thermal safety
• Supports both single and dual cell lithium-ion/polymer chemistries

Applications

• Portable electronic devices requiring dual-cell power sources
• Medical equipment with strict charging safety requirements
• Industrial handheld instruments

Procurement Notes

Verify the specific suffix '840' confirms the 8.4V dual-cell configuration, as other suffixes indicate different voltages. Confirm the 'T' prefix denotes tape-and-reel packaging if required by assembly lines. Check Microchip's official lifecycle status, as this component may be subject to discontinuation or obsolescence notices.

Selection Notes

Select this part when a dedicated solution for two-series lithium cells is needed with integrated thermal and timing safeguards. Ensure the application input voltage falls within the 4.5 V to 12 V operational range. Consider the 10 mA current limit suitability for low-power applications rather than high-drain devices.

Part Context

This component belongs to the MCP7384x family of charge management controllers from Microchip Technology. It shares functional similarities with variants like the MCP73841 and MCP73843 but differs in cell support and output voltage settings. The UN suffix specifically identifies the MSOP-10 plastic package option.

Replacement Considerations

Publicly confirmed substitutes include MCP73842T-840I/MS (same function, MSOP-8 package) and MCP73844T-840I/MS (similar dual-cell support). Verify pinout compatibility and package dimensions before substitution.