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MCP6541T-I/OT

Single Comparator, 600nA Iq, Push-Pull RRIO, SOT-23-5, AEC-Q100

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Manufacturer Part：

MCP6541T-I/OT

Package：

SOT-23-5 (2.9 x 1.6 x 1.0 mm)

Description

Product Overview

The MCP6541T-I/OT from Microchip Technology is a single-channel push-pull output sub-microamp comparator with 600 nA quiescent current, rail-to-rail input, and 4 us propagation delay in a SOT-23-5 package.

Key Specifications

Type	Single Push-Pull Output Sub-Microamp Comparator
Channels	1
Supply Voltage	1.6 V to 5.5 V
Quiescent Current	600 nA (typical)
Propagation Delay	4 us (typical @ 100mV overdrive)
Input Offset Voltage	+/-1.5 mV (typical), +/-7 mV (max)
Input Bias Current	1 pA (typical)
Input Hysteresis	3.3 mV (typical)
CMRR	70 dB (typical)
Output	Push-Pull (CMOS/TTL compatible)
Package	SOT-23-5
Operating Temperature	-40C to +85C (I grade)

Features

Ultra-low 600 nA quiescent current
Rail-to-rail input range (VSS-0.3V to VDD+0.3V)
Push-pull CMOS/TTL output
4 us propagation delay
3.3 mV internal hysteresis for noise immunity
1 pA input bias current (CMOS input)
AEC-Q100 Grade 1 qualified

Applications

Battery-powered voltage monitoring
Window comparator circuits
RC oscillator and timer
Alarm and monitoring systems

Product Introduction:MCP6541T-I/OT Product Introduction

The MCP6541T-I/OT from Microchip Technology is a single-channel push-pull output comparator optimized for ultra-low-power applications. The 600 nA typical quiescent current enables years of battery operation in always-on monitoring circuits. The rail-to-rail input range extends 300 mV beyond both supply rails, accommodating the full input common-mode range without phase reversal. The push-pull output stage swings rail-to-rail, directly driving CMOS and TTL logic inputs without pull-up resistors. The 3.3 mV internal hysteresis prevents output oscillation due to input noise, which is critical for slowly-varying signals. The 1 pA input bias current preserves high-impedance source accuracy. The 4 us propagation delay supports moderate-speed applications. The AEC-Q100 Grade 1 qualification enables automotive use. The SOT-23-5 package provides a minimal footprint.

Working Principle:MCP6541T-I/OT Working Principle

The MCP6541T-I/OT uses a CMOS input stage that provides the 1 pA input bias current and rail-to-rail common-mode range. The input stage is followed by a high-gain differential amplifier that compares the IN+ and IN- voltages. When IN+ exceeds IN- by more than the offset voltage plus hysteresis, the output drives to VDD (logic HIGH). When IN- exceeds IN+ by the same threshold, the output drives to VSS (logic LOW). The 3.3 mV internal hysteresis creates two distinct switching thresholds: a higher threshold for positive-going inputs and a lower threshold for negative-going inputs. This hysteresis window prevents the output from chattering when the input signal slowly crosses the threshold or has noise superimposed. The push-pull CMOS output stage uses complementary P-channel and N-channel transistors to actively drive the output to both VDD and VSS, unlike open-drain comparators that require an external pull-up resistor. The 600 nA quiescent current is achieved by operating the internal amplifier at very low bias currents, which limits the bandwidth and results in the 4 us propagation delay.

Pin Description:MCP6541T-I/OT Pin Definition and Functions

Pin	Name	Type	Function
1	VDD	Power	Positive supply (1.6-5.5V)
2	IN-	Input	Inverting input
3	IN+	Input	Non-inverting input
4	VSS	Power	Ground / negative supply
5	OUT	Output	Push-pull output

Application Scenarios:In which products and applications isMCP6541T-I/OT used

Battery voltage monitor with 600nA always-on current and push-pull output to MCU GPIO
Window comparator using 2x MCP6541 for over/undervoltage alarm
RC relaxation oscillator at 1kHz for system tick with 600nA average current
Capacitive touch sensor threshold detector with 1pA input bias current

Alternative Models:What chips are recommended as replacements for MCP6541T-I/OT

Manufacturer	Part Number	Package	Notes
Microchip	MCP6541T-E/OT	SOT-23-5	Extended temp -40~125C version
TI	TLV3491AIDBVR	SOT-23-5	Push-pull, 1.8uA, similar class
Microchip	MCP6541RT-I/OT	SOT-23-5	Automotive grade version
Microchip	MCP6541T-I/SN	SOIC-8	Same function, SOIC-8 package
Maxim	MAX9031AKA+T	SOT-23-5	Push-pull, 0.5uA, alternative