MAX9021:Micropower, Ultra-Small, Single/Dual/Quad Single-Supply Comparators

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.

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)
MAX9021, MAX9022, MAX9024: Typical Operating Circuit
MAX9021, MAX9022, MAX9024: Typical Operating Circuit
Applications/Uses
  • Battery-Powered
  • Digital Line Receivers
  • Keyless Entry Systems
  • Mobile Communications
  • Photodiode Preamps
  • Portable Systems
  • Sensor-Signal Detection
  • Threshold Detectors/Discriminators
DataSheet
titleDownload file
MAX9021-MAX9024 Data SheetMAX9021-MAX9024.pdf
Parametrics
Part NumberComp-
arators
tPD
(ns)
Input RangeVSUPPLY (Total)
(V)
VSUPPLY (Total)
(V)
ICC per Comp.
(µA)
VOS
(mV)
VOS
(mV)
Logic OutOper. Temp.
(°C)
Package/PinsBudgetary
Price
typminmaxmaxtypmaxSee Notes
MAX902113000to Neg. Rail2.55.5518Push-Pull-40 to +125SC-70/5
SOT/5
$0.36 @1k
MAX90222µMAX/8
SOIC(N)/8
SOT/8
$0.55 @1k
MAX90244SOIC(N)/14
TSSOP/14
$0.64 @1k
Quality and Environmental Data
Related Products
  • MAX9077:Low-Cost, Ultra-Small, 3µA Single-Supply Comparators
  • MAX9075:Low-Cost, Ultra-Small, 3µA Single-Supply Comparators
  • MAX9032:Low-Cost, Ultra-Small, Single/Dual/Quad Single-Supply Comparators
  • MAX9030:Low-Cost, Ultra-Small, Single/Dual/Quad Single-Supply Comparators
  • MAX9034:Low-Cost, Ultra-Small, Single/Dual/Quad Single-Supply Comparators
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX9021AUK+ActiveSOT,;5 pin;9 mm²-40°C to +125°CLead Free
MAX9021AUK+TActiveSOT,;5 pin;9 mm²-40°C to +125°CLead Free
MAX9021AUK-TNo Longer AvailableMAX9021AUK+TSOT,;5 pin;9 mm²-40°C to +125°CNo
MAX9021AXK+ActiveSC-70,;5 pin;5.3 mm²-40°C to +125°CLead Free
MAX9021AXK+TActiveSC-70,;5 pin;5.3 mm²-40°C to +125°CLead Free
MAX9021AXK-TNo Longer AvailableMAX9021AXK+TSC-70,;5 pin;5.3 mm²-40°C to +125°CNo
MAX9021-MAX9024.pdf MAX9024
Light Is On When Power Is Out MAX9021
MAX9021.pdf MAX9021
MAX9021-MAX9024.pdf MAX9024