MAX9022ASA Equivalent & Substitute Parts

Part Overview

The MAX9022ASA is a dual-channel general-purpose comparator manufactured by Analog Devices Inc./Maxim Integrated, housed in an 8-SOIC surface-mount package. This device features CMOS, rail-to-rail, and TTL output characteristics with a supply voltage range of 2.5V to 5.5V (single supply) or ±1.25V to ±2.75V (dual supply). The MAX9022ASA is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production support.

Key Parameters

Parameter	Value
Manufacturer	Analog Devices Inc./Maxim Integrated
Part Number	MAX9022ASA
Category	Linear Comparator
Package Type	8-SOIC (0.154", 3.90mm Width)
Number of Elements	2
Output Type	CMOS, Rail-to-Rail, TTL
Supply Voltage (Single)	2.5V ~ 5.5V
Supply Voltage (Dual)	±1.25V ~ 2.75V
Input Offset Voltage (Max)	1mV @ 5V
Input Bias Current (Max)	0.003µA @ 5V
Quiescent Current (Max)	5µA
CMRR / PSRR (Typ)	100dB CMRR, 80dB PSRR
Propagation Delay (Max)	8µs
Hysteresis	4mV
Operating Temperature	-40°C ~ 125°C
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the MAX9022ASA is determined by the following critical parameters:

Primary Substitution Criteria:

Package compatibility: 8-SOIC surface-mount form factor
Number of comparator elements: 2 channels
Output type: CMOS, rail-to-rail, or TTL output capability
Supply voltage range: Minimum 2.5V single supply or equivalent dual supply
Input offset voltage: Maximum 1mV specification
Operating temperature range: Support for -40°C to 125°C or compatible subset

Secondary Compatibility Factors:

Input bias current performance
Quiescent current consumption
Propagation delay characteristics
CMRR and PSRR specifications
Hysteresis voltage

Substitute parts are grouped into two categories: direct equivalents (identical electrical specifications and packaging) and functional alternatives (compatible electrical performance within application tolerance, potentially with different package variants or slightly relaxed specifications).

Parameter Comparison

Part Number	Manufacturer	Package	Output Type	Supply Voltage (Single)	Input Offset (Max)	Quiescent Current (Max)	Propagation Delay (Max)	Operating Temp	Product Status
MAX9022ASA	Analog Devices	8-SOIC	CMOS, Rail-to-Rail, TTL	2.5V ~ 5.5V	1mV @ 5V	5µA	8µs	-40°C ~ 125°C	Obsolete
MAX9022ASA+	Analog Devices	8-SOIC	CMOS, Rail-to-Rail, TTL	2.5V ~ 5.5V	1mV @ 5V	5µA	8µs	-40°C ~ 125°C	Active
ALD2302ASAL	Advanced Linear Devices	8-SOIC	CMOS, NMOS, Push-Pull, TTL	4V ~ 10V	1mV @ 5V	500µA	—	0°C ~ 70°C	Active
ALD2302SAL	Advanced Linear Devices	8-SOIC	CMOS, NMOS, Push-Pull, TTL	4V ~ 10V	4mV @ 5V	500µA	—	0°C ~ 70°C	Active
AZV3002S-13	Diodes Incorporated	8-SOIC	Push-Pull	1.6V ~ 5.5V	30mV	9µA (Typ)	0.8µs	-40°C ~ 85°C	Active
BU7232F-E2	Rohm Semiconductor	8-SOIC	Push-Pull	1.8V ~ 5.5V	11mV @ 3V	25µA	1.7µs	-40°C ~ 85°C	Active
BU7232SF-E2	Rohm Semiconductor	8-SOIC	Push-Pull	1.8V ~ 5.5V	11mV @ 3V	25µA	1.7µs	-40°C ~ 105°C	Active
BU7252SF-E2	Rohm Semiconductor	8-SOIC	Push-Pull	1.8V ~ 5.5V	11mV @ 3V	65µA	550ns	-40°C ~ 105°C	Active
LMC6762BIM	Texas Instruments	8-SOIC	Push-Pull, Rail-to-Rail	2.7V ~ 15V	15mV @ 5V	20µA	10µs	-40°C ~ 85°C	Obsolete
NCX2220GU,115	NXP USA Inc.	8-XFDFN	Rail-to-Rail	1.3V ~ 5.5V	30mV @ 5.5V	5µA	0.8µs	-40°C ~ 85°C	Obsolete
TLV3702CD	Texas Instruments	8-SOIC	CMOS, Push-Pull, Rail-to-Rail	2.5V ~ 16V	5mV @ 15V	1µA	—	0°C ~ 70°C	Obsolete

Engineering Selection Recommendations

Direct Equivalent (Recommended Primary Choice):

MAX9022ASA+ is the direct equivalent with identical electrical specifications and 8-SOIC packaging. This part is currently in active production status, making it the preferred choice for new designs and production continuity. Both parts are ROHS3 compliant and carry identical compliance certifications.

Active Production Alternatives:

For applications requiring active production status with 8-SOIC packaging, the following parts provide functional compatibility:

BU7232SF-E2 and BU7252SF-E2 (Rohm Semiconductor): Both support the full -40°C to 105°C operating range, matching or exceeding the MAX9022ASA temperature specification. BU7252SF-E2 offers superior propagation delay (550ns vs. 8µs). These parts feature push-pull output and operate across 1.8V to 5.5V supply range.
AZV3002S-13 (Diodes Incorporated): Provides the lowest propagation delay (0.8µs) among active alternatives and supports extended supply voltage range down to 1.6V. Operating temperature range is -40°C to 85°C.
ALD2302ASAL (Advanced Linear Devices): Maintains 1mV input offset voltage specification and operates across 4V to 10V supply range. Operating temperature is limited to 0°C to 70°C.

Obsolete Status Considerations:

LMC6762BIM and TLV3702CD are obsolete parts. While electrically compatible, these should only be selected if existing inventory is available and production continuity is not a concern. NCX2220GU,115 is also obsolete and uses a different package format (8-XFDFN), requiring PCB redesign.

Compliance and Certification:

All recommended substitute parts maintain ROHS3 compliance and REACH unaffected status, consistent with the original MAX9022ASA specifications.

Frequently Asked Questions (FAQ)

Q: Can MAX9022ASA+ be used as a direct replacement for MAX9022ASA?

A: Yes. MAX9022ASA+ is the direct equivalent with identical electrical specifications, package type (8-SOIC), and performance characteristics. The primary difference is product status: MAX9022ASA+ is in active production while MAX9022ASA is obsolete.

Q: What is the key difference between BU7232SF-E2 and BU7252SF-E2?

A: Both parts share identical supply voltage range (1.8V ~ 5.5V), input offset voltage (11mV @ 3V), and input bias current (1pA @ 3V). The primary differences are propagation delay (BU7252SF-E2: 550ns vs. BU7232F-E2: 1.7µs) and quiescent current (BU7252SF-E2: 65µA vs. BU7232F-E2: 25µA). Select BU7252SF-E2 for speed-critical applications; select BU7232SF-E2 for lower power consumption.

Q: Are there package alternatives to 8-SOIC?

A: NCX2220GU,115 uses an 8-XFDFN package format. This requires PCB layout redesign and is not recommended as a direct substitute unless the smaller footprint is a design requirement. This part is also obsolete.

Q: What is the operating temperature limitation when selecting ALD2302ASAL or ALD2302SAL?

A: Both ALD2302 variants operate across 0°C to 70°C, which is narrower than the MAX9022ASA specification of -40°C to 125°C. These parts are suitable only for applications within the 0°C to 70°C range.

Q: How does input offset voltage affect substitution compatibility?

A: Input offset voltage determines DC accuracy in comparator applications. The MAX9022ASA specifies 1mV maximum at 5V. Substitutes with higher offset voltage (e.g., AZV3002S-13 at 30mV, BU7232SF-E2 at 11mV) may require circuit-level compensation or are suitable only for applications with relaxed accuracy requirements.

Q: What supply voltage range should I verify when selecting a substitute?

A: Verify that the substitute part's supply voltage range encompasses your application's operating voltage. The MAX9022ASA supports 2.5V to 5.5V (single supply). Some alternatives (e.g., AZV3002S-13) support lower minimum voltages (1.6V), while others (e.g., ALD2302 series) require higher minimum voltages (4V). Confirm compatibility with your power supply design.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed in this document maintain ROHS3 compliance and REACH unaffected status, consistent with the original MAX9022ASA specifications.

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