MCP6549T-I/ST

Comparators Overview

The MCP6549T-I/ST is a quad analog comparator from Microchip Technology, housed in a 14-TSSOP surface-mount package. It operates on a single supply voltage ranging from 1.6V to 5.5V with a typical quiescent current of 600 nA per channel. The device features rail-to-rail input capability and open-drain outputs capable of driving loads up to 10V via an external pull-up resistor. Key electrical specifications include a typical propagation delay of 4 µs at 100 mV overdrive, an input offset voltage of ±7 mV, and an input bias current of 1 pA. It supports industrial temperature operation from -40°C to +85°C.

Comparators Feature Summary

• Quad configuration with low power consumption optimized for single-supply applications
• Rail-to-rail input stage prevents phase reversal when inputs exceed supply rails
• Open-drain digital outputs facilitate level-shifting and wired-OR logic implementation
• Internal hysteresis eliminates output switching caused by input noise voltage

Comparators Applications

• Laptop Computers
• Mobile Phones
• Metering Systems
• Hand-held Electronics
• Alarm and Monitoring Circuits

Comparators Procurement Notes

Verify the specific suffix 'I/ST' corresponds to the Industrial temperature range (-40°C to +85°C) and TSSOP-14 packaging as documented in the datasheet. Confirm that the open-drain output requires an external pull-up resistor for proper high-level signal generation. Ensure the application voltage does not exceed the absolute maximum ratings for the output pin relative to ground.

Comparators Selection Notes

Select this component when a quad comparator with minimal quiescent current is required. The open-drain output architecture is suitable for interfacing with different logic voltage levels using a pull-up resistor. Verify that the 4 µs propagation delay meets the timing requirements of the target circuit. Consider the 14-TSSOP package dimensions for PCB layout constraints.

Comparators Part Context

This part belongs to the MCP6546/6R/6U/7/8/9 family of sub-microamp comparators. While the MCP6549 provides four channels, other variants in the series offer single or dual configurations. Related devices like the MCP6541/2/3/4 feature push-pull outputs instead of open-drain, providing compatibility with standard CMOS/TTL logic without requiring external pull-up components.

Comparators Replacement Considerations

Direct functional replacements within the same family include MCP6546 (Single), MCP6547 (Dual), and MCP6548 (Single with Chip Select). For quad configurations, verify if the MCP6549-E/ST (Extended Temperature) is acceptable if the operating environment exceeds the industrial range.