MAX9032ASA Equivalent & Substitute Parts

Part Overview

The MAX9032ASA is a dual-channel general-purpose comparator manufactured by Analog Devices Inc./Maxim Integrated, featuring push-pull, rail-to-rail output architecture in an 8-SOIC surface-mount package. The device operates across a 2.5V to 5.5V supply range with low input offset voltage (1mV @ 5V) and fast propagation delay (228ns), making it suitable for precision signal conditioning and threshold detection applications.

The MAX9032ASA is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support long-term product support for legacy systems or new designs requiring compatible performance characteristics.

Key Parameters

Parameter	Value	Unit
Number of Elements	2	Channels
Output Type	Push-Pull, Rail-to-Rail	—
Voltage - Supply, Single/Dual (±)	2.5V ~ 5.5V	V
Voltage - Input Offset (Max)	1mV @ 5V	mV
Current - Input Bias (Max)	0.008µA @ 5V	µA
Current - Quiescent (Max)	55µA	µA
CMRR, PSRR (Typ)	100dB CMRR, 100dB PSRR	dB
Propagation Delay (Max)	228ns	ns
Hysteresis	4mV	mV
Operating Temperature	-40°C ~ 125°C	°C
Package / Case	8-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the MAX9032ASA is determined by strict alignment of the following critical parameters:

Primary Substitution Criteria:

Number of elements: 2 channels
Output type: Push-pull configuration (rail-to-rail preferred for voltage swing compatibility)
Supply voltage range: Minimum 2.5V support; maximum ≥5.5V
Input offset voltage: ≤1mV @ 5V (precision threshold detection)
Input bias current: ≤0.008µA @ 5V (high-impedance input requirement)
Quiescent current: ≤55µA (power consumption constraint)
Package compatibility: 8-pin surface-mount (SOIC, SOP, MSOP, TSSOP variants acceptable)
Operating temperature: Minimum -40°C; maximum ≥125°C preferred

Secondary Compatibility Factors:

CMRR/PSRR: ≥80dB (noise rejection)
Propagation delay: ≤228ns (timing-critical applications)
RoHS3 compliance and MSL rating

Substitutes are grouped into three categories: direct equivalents (same manufacturer, active status), manufacturer-recommended alternatives (different manufacturer, verified compatibility), and functional equivalents (different package or slightly relaxed parameters within acceptable margins).

Parameter Comparison

Part Number	Manufacturer	Status	Supply Voltage (V)	Input Offset (mV @ 5V)	Input Bias (µA @ 5V)	Quiescent (µA)	Propagation Delay (ns)	Package	Temp Range (°C)
MAX9032ASA	Analog Devices	Obsolete	2.5–5.5	1	0.008	55	228	8-SOIC	-40 to 125
MAX9032ASA+	Analog Devices	Active	2.5–5.5	1	0.008	55	228	8-SOIC	-40 to 125
ALD2302ASAL	Advanced Linear Devices	Active	4–10, ±2–5	1	0.001	500	—	8-SOIC	0 to 70
ALD2302SAL	Advanced Linear Devices	Active	4–10, ±2–5	4	0.001	500	—	8-SOIC	0 to 70
BU7232F-E2	Rohm Semiconductor	Active	1.8–5.5, ±0.9–2.75	11	0.001	25	1700	8-SOP	-40 to 85
BU7232SF-E2	Rohm Semiconductor	Active	1.8–5.5, ±0.9–2.75	11	0.001	25	1700	8-SOP	-40 to 105
BU7232SFVM-TR	Rohm Semiconductor	Active	1.8–5.5, ±0.9–2.75	11	0.001	25	1700	8-MSOP	-40 to 105
BU7252SF-E2	Rohm Semiconductor	Active	1.8–5.5, ±0.9–2.75	11	0.001	65	550	8-SOP	-40 to 105
HA1631D01TEL-E	Renesas Electronics	Active	1.8–5.5	5	0.001	20	—	8-TSSOP	-40 to 85
LMC6762AIM	Texas Instruments	Obsolete	2.7–15, ±1.35–7.5	5	0.0004	20	10000	8-SOIC	-40 to 85
LMC6762BIM/NOPB	Texas Instruments	Last Time Buy	2.7–15, ±1.35–7.5	15	0.0004	20	10000	8-SOIC	-40 to 85

Engineering Selection Recommendations

Direct Equivalent (Recommended Primary Choice): MAX9032ASA+ is the active-status direct equivalent of the obsolete MAX9032ASA. Identical electrical specifications, same 8-SOIC package, and full parameter compatibility ensure drop-in replacement capability. Active product status guarantees long-term availability and supply chain support.

Alternative Selections Based on Application Requirements:

For applications requiring extended temperature operation (-40°C to 125°C), the MAX9032ASA+ remains the only substitute meeting this specification. The Rohm BU7232 series (BU7232F-E2, BU7232SF-E2, BU7232SFVM-TR) and Renesas HA1631D01TEL-E are limited to -40°C to 85°C or -40°C to 105°C maximum.

For space-constrained designs, BU7232SFVM-TR offers the smallest footprint (8-MSOP, 2.80mm width) while maintaining active product status and RoHS3 compliance. Trade-offs include higher input offset voltage (11mV vs. 1mV) and slower propagation delay (1.7µs vs. 228ns).

For applications tolerating lower supply voltage (1.8V minimum), BU7232 variants and HA1631D01TEL-E support operation down to 1.8V, compared to MAX9032ASA's 2.5V minimum.

The LMC6762 series (Texas Instruments) supports wider supply voltage range (2.7V to 15V) and dual-supply operation (±1.35V to ±7.5V), suitable for mixed-signal systems. However, both LMC6762AIM and LMC6762BIM/NOPB carry obsolete or last-time-buy status, limiting long-term viability.

ALD2302 variants (Advanced Linear Devices) are active products with 8-SOIC packaging but exhibit higher quiescent current (500µA vs. 55µA) and narrower temperature range (0°C to 70°C), making them unsuitable for industrial or extended-temperature applications.

All recommended substitutes maintain RoHS3 compliance, MSL Level 1 rating, and surface-mount compatibility with standard PCB assembly processes.

Frequently Asked Questions (FAQ)

Q: Can MAX9032ASA+ be used as a direct replacement for MAX9032ASA? A: Yes. MAX9032ASA+ is the active-status equivalent with identical electrical and mechanical specifications. The "+" suffix indicates packaging format (tube vs. alternative packaging) but does not affect functional performance. Direct substitution is supported without design modification.

Q: What is the primary limitation when substituting with Rohm BU7232 series comparators? A: The BU7232 series exhibits higher input offset voltage (11mV vs. 1mV) and significantly slower propagation delay (1.7µs vs. 228ns). These differences are acceptable for general-purpose threshold detection but unsuitable for precision analog signal conditioning or high-speed comparisons. Additionally, maximum operating temperature is limited to 85°C or 105°C, below the MAX9032ASA's 125°C rating.

Q: Are there package alternatives to 8-SOIC? A: Yes. BU7232SFVM-TR offers 8-MSOP packaging (2.80mm width) for space-constrained applications. BU7232F-E2 and BU7232SF-E2 use 8-SOP packaging (4.40mm width). HA1631D01TEL-E uses 8-TSSOP packaging. All maintain dual-channel, push-pull output architecture and surface-mount compatibility. Package selection depends on PCB layout constraints and assembly equipment capability.

Q: Which substitute supports the widest supply voltage range? A: LMC6762AIM and LMC6762BIM/NOPB support 2.7V to 15V single-supply or ±1.35V to ±7.5V dual-supply operation, the widest range among listed substitutes. However, both parts carry obsolete or last-time-buy status. For active products, BU7232 variants support 1.8V to 5.5V or ±0.9V to ±2.75V, and HA1631D01TEL-E supports 1.8V to 5.5V.

Q: What is the impact of higher quiescent current in ALD2302 variants? A: ALD2302ASAL and ALD2302SAL draw 500µA quiescent current compared to MAX9032ASA's 55µA. In battery-powered or low-power applications, this 9× increase significantly reduces operating time or requires larger power supplies. These parts are suitable only for applications where quiescent current is not a design constraint.

Q: Can LMC6762 series be used in place of MAX9032ASA? A: LMC6762AIM and LMC6762BIM/NOPB are functionally compatible but exhibit critical differences: 10µs propagation delay (vs. 228ns), lower quiescent current (20µA vs. 55µA), and wider supply range. Both parts are obsolete or last-time-buy, limiting supply availability. Use only if extended supply voltage range is essential and propagation delay is not timing-critical.

Q: Is temperature range a critical substitution factor? A: Yes, for industrial and automotive applications. MAX9032ASA operates -40°C to 125°C. Most substitutes (BU7232, HA1631D01TEL-E) are limited to -40°C to 85°C or -40°C to 105°C. ALD2302 variants are limited to 0°C to 70°C. Verify application temperature requirements before substitution to avoid out-of-specification operation.

Q: Are all listed substitutes RoHS3 compliant? A: Yes. All substitute parts listed carry RoHS3 compliance and MSL Level 1 (unlimited moisture sensitivity) rating, meeting environmental and reliability standards equivalent to the MAX9032ASA.

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