Key Selection Information
| Selection Parameter | Confirmed Information |
|---|---|
| Function | Single low-power comparator |
| Output | CMOS/TTL-compatible push-pull |
| Supply range | 1.6 V to 5.5 V |
| Quiescent current | 600 nA typical, 1 µA maximum |
| Input range | Greater than rail-to-rail, approximately VSS – 0.3 V to VDD + 0.3 V |
| Typical propagation delay | 4 µs at 100 mV overdrive |
| Temperature range | -40°C to +125°C |
| Product status | Active exact orderable |
Product Overview
The MCP6541RT-E/OT is the extended-temperature, reverse-pinout SOT-23-5 ordering variant of Microchip’s MCP6541 sub-microamp comparator. It operates from 1.6 V to 5.5 V and combines a push-pull output with very low supply current for battery-powered threshold, supervisory and sensor-interface circuits.
The RT pinout is a procurement and PCB-layout detail that should not be ignored. Microchip offers several MCP6541 SOT-23 orientations, so a functionally similar MCP6541 order code can still be mechanically incompatible if the suffix is changed without checking the pin assignment.
Technical Specifications
| Parameter | Confirmed Information |
|---|---|
| Comparator channels | 1 |
| Supply voltage | 1.6 V to 5.5 V |
| Quiescent current | 600 nA typical, 1 µA max |
| Input bias current | 1 pA max at stated conditions |
| Input offset voltage | 7 mV max at 5.5 V orderable listing |
| Typical propagation delay | 4 µs at 100 mV overdrive |
| Maximum propagation delay | 8 µs orderable listing |
| Typical hysteresis | 3.3 mV family feature |
| Output type | Push-pull CMOS/TTL |
| Temperature grade | Extended, -40°C to +125°C |
| Package | SOT-23-5 |
Design Considerations
The greater-than-rail input range is useful for low-voltage sensing, but input pins still have absolute-maximum limits. Signals that can exceed the supply rails during power sequencing should be checked against the protection-current limits rather than relying on the functional common-mode description alone.
The device trades speed for extremely low current. A several-microsecond propagation delay is suitable for supervisory and slow sensing functions, but it is not a substitute for a high-speed comparator in timing-critical edge detection.
Related Engineering Resources
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Third-party inspection or testing can be arranged according to customer requirements. Testing fees are borne by the buyer. Additional verification requirements can be discussed before shipment. After an order is placed, physical product, label, packaging, and Date Code photos may be provided where appropriate.
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