MCP6549-E/SL

Comparators Overview

The MCP6549-E/SL is a quad analog comparator from Microchip Technology, housed in a 14-lead TSSOP package. It operates on a single supply voltage ranging from 1.6V to 5.5V with a typical quiescent current of 600 nA per comparator. The device features rail-to-rail input capability extending from VSS - 0.3V to VDD + 0.3V and utilizes an open-drain output structure capable of supporting pull-up voltages up to 10V. Key electrical specifications include a maximum propagation delay of 8 µs, an input offset voltage of ±7 mV, and an internal hysteresis of 3.3 mV (typical). It supports industrial temperature ranges from -40°C to +85°C.

Comparators Feature Summary

• Quad configuration providing four independent comparison channels within a compact surface-mount package.
• Rail-to-rail input stage allows signal detection across the full power supply range without phase reversal.
• Open-drain digital outputs facilitate level-shifting applications and wired-OR logic implementation.
• Integrated internal hysteresis reduces output switching noise caused by input signal fluctuations.

Comparators Applications

• Laptop computers
• Mobile phones
• Metering systems
• Hand-held electronics
• Alarm and monitoring circuits

Comparators Procurement Notes

Verify that the ordering suffix 'SL' corresponds specifically to the 14-lead TSSOP package variant. Confirm the '-E' designation aligns with the required industrial temperature range of -40°C to +85°C. Ensure the application circuit includes appropriate pull-up resistors for the open-drain outputs, as these do not provide high-level drive internally. Cross-reference the datasheet revision to confirm pinout compatibility if replacing existing components.

Comparators Selection Notes

Select this component when multiple independent comparison functions are required in space-constrained designs. The low quiescent current makes it suitable for battery-powered portable devices. The open-drain output requires external pull-up resistors; ensure the selected resistor values support the desired toggle frequency and load capacitance. Verify that the 10V output limit meets the requirements of any downstream logic or level-shifting interfaces.

Comparators Part Context

This part belongs to the MCP6546/6R/6U/7/8/9 family of sub-microamp comparators. While the MCP6546 is a single channel and the MCP6547 is dual, the MCP6549 provides four channels. Related parts like the MCP6541/2/3/4 feature push-pull outputs instead of open-drain. The MCP6548 adds a Chip Select pin for power management, which is absent in the standard MCP6549.

Comparators Replacement Considerations

MCP6549T-E/ST

Comparators FAQ

Does the MCP6549-E/SL experience phase reversal?

No, the device is designed to prevent phase inversion even when input pins exceed the supply voltages.

What is the maximum voltage allowed at the open-drain output?

The output can be pulled up to a maximum of 10V above VSS.