Analog Devices MAX9021AXK — Analog & Data Acquisition
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Analog Devices / Analog & Data Acquisition

MAX9021AXK General Purpose Comparator, SC-70-5

MPN MAX9021AXK
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Maxim Integrated MAX9021AXK, General Purpose comparator, Series MAX9021, Push-Pull output, 4mV hysteresis, 5µA quiescent, 2.5V to 5.5V supply, SC-70-5 package, -40°C to 125°C.

In Stock: 2,941 pcs
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[SPEC] Essential Parameters Snapshot Full Specifications (16)
Package / Case 5-TSSOP, SC-70-5, SOT-353
Supply Voltage 2.5V ~ 5.5V

Full Technical Specifications

16 Parameters
MAX9021AXK specifications
Parameter / AttributeSpecification / Value
TypeGeneral Purpose
SeriesMAX9021
Output typePush-Pull
MountingSurface Mount
Voltage - input offset8mV @ 5V
Voltage - supply, single (Dual (±))2.5V ~ 5.5V
Output current50mA @ 5V
Current - quiescent5µA
Current - input bias0.08µA @ 5V
Operating temperature-40°C ~ 125°C
PackageBulk
Hysteresis4mV
Case5-TSSOP, SC-70-5, SOT-353
CMRR, PSRR100dB, 80dB PSRR
Number of elements1
Propagation delay8µs (Typ)
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Technical Details & Description

The 4 mV hysteresis is built in — no external resistor divider needed for clean switching at slow edges. Propagation delay is 8 µs typical, so this is not a high-speed comparator for switching regulators or fast overcurrent detection; it is sized for level sensing, window comparators, and wake-up circuits where response time in microseconds is acceptable. Input bias current is 0.08 µA max at 5 V, which lets you use high-value resistor dividers without offset error. Output sink/source is 50 mA at 5 V, enough to drive a logic input or a small LED directly.

RoHS status is non-compliant, so verify your assembly line's exemption or lead-free policy before specifying.

Frequently asked questions

What is the output type of MAX9021AXK?

Push-pull output — no external pull-up resistor required. The output swings rail-to-rail and can sink or source up to 50 mA at 5 V.

What are the equivalents or replacements for MAX9021AXK?

No pin-compatible direct replacement is listed in the available cross-reference data. Within the MAX9021 series, other package options exist, but the SC-70-5 variant is unique. For a functional equivalent, look for a single general-purpose comparator in SC-70-5 with push-pull output and 2.5 V to 5.5 V supply range.

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