The MAX9021/MAX9022/MAX9024 single/dual/quad comparators are optimized for low-power consumption while still providing a fast output response. They are designed for single-supply applications from 2.5V to 5.5V, but can also operate from dual supplies. These comparators have a 3µs propagation delay and consume 2.8µA of supply current per comparator over the -40°C to +125°C operating temperature range. The combination of low-power, single-supply operation down to 2.5V, and ultra-small footprint makes these devices ideal for portable applications.

The MAX9021/MAX9022/MAX9024 have 4mV of built-in hysteresis to provide noise immunity and prevent oscillations even with a slow-moving input signal. The input common-mode range extends from the negative supply to within 1.1V of the positive supply. The design of the comparator-output stage substantially reduces switching current during output transitions, eliminating powersupply glitches.

The MAX9021 single comparator is available in tiny 5-pin SC70 and SOT23 packages. The MAX9022 dual comparator is available in 8-pin SOT23, µMAX®, and SO packages, and the MAX9024 quad comparator is available in 14-pin TSSOP and SO packages.

MAX9021, MAX9022, MAX9024: Typical Operating Circuit

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Key Features

Low-Cost Solution Available in Space-Saving SC70 Packages (Half the Size of SOT23)
Low 2.8µA Supply Current
3µs Propagation Delay
Internal 4mV Comparator Hysteresis
Comparator Output Swings Rail-to-Rail
2.5 to 5.5V Single-Supply Voltage Range
No Phase Reversal for Overdriven Inputs
Space-Saving Packages
- 5-Pin SC70 (MAX9021)
- 8-Pin SOT23 (MAX9022)
- 8-Pin µMAX (MAX9022)
- 14-Pin TSSOP (MAX9024)

Applications/Uses

Battery-Powered
Digital Line Receivers
Keyless Entry Systems
Mobile Communications
Photodiode Preamps
Portable Systems
Sensor-Signal Detection
Threshold Detectors/Discriminators

Parametric Specs

Part Number

Comp-
arators

t_PD
(ns)

Input Range

V_SUPPLY (Total)
(V)

I_CC per Comp.
(µA)

V_OS
(mV)

Logic Out

Oper. Temp.
(°C)

Package/Pins

Budgetary
Price

typ

min

max

typ

max

See Notes

MAX9021

3000

to Neg. Rail

2.5

5.5

Push-Pull

-40 to +125

SC70/5

SOT23/5

$0.38 @1k

MAX9022

SOIC (N)/8

SOT23/8

UMAX/8

$0.55 @1k

MAX9024

SOIC (N)/14

TSSOP/14

$0.67 @1k

See All Comparators (95)

Pricing Notes:

This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Design Resources

Technical Documents

App Note 4234 AC-Based Continuity Tester Finds Single-Ended Faults

Quality and Environmental Data

Product Reliability Reports: MAX9022.pdf
Lead-Free Package Tin (Sn) Whisker Reports

Quality And Environmental

Device	Fab Process	Technology	Sample size	Rejects	FIT at 25°C	FIT at 55°C

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

Quality Management System >
Environmental Management System >

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