BU7252F-E2 Equivalent & Substitute Parts

Part Overview

The BU7252F-E2 is a dual-channel general purpose comparator manufactured by Rohm Semiconductor in 8-SOP surface mount packaging. This device features push-pull output configuration with supply voltage range of 1.8V to 5.5V (single supply) or ±0.9V to ±2.75V (dual supply). The part is actively produced and ROHS3 compliant, making it suitable for modern electronic applications requiring low-power comparison functionality.

Substitute parts are identified when equivalent electrical performance can be achieved within the specified parameter tolerances while maintaining mechanical compatibility through standard 8-SOIC packaging and surface mount mounting type.

Substiute Parts

BU7252F-E2

Rohm SemiconductorIn Stock: 6365BU7252F-E2 Datasheet

Current PartRFQ

BU7252F-E2

Rohm SemiconductorIn Stock: 6365BU7252F-E2 Datasheet

Parametric EquivalentRFQ

MAX9022ASA+

Analog Devices Inc./Maxim IntegratedIn Stock: 1558MAX9022ASA+ Datasheet

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MAX9022ASA+T

Analog Devices Inc./Maxim IntegratedIn Stock: 3315MAX9022ASA+T Datasheet

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MAX9032ASA+

Analog Devices Inc./Maxim IntegratedIn Stock: 2466MAX9032ASA+ Datasheet

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MAX9032ASA+T

Analog Devices Inc./Maxim IntegratedIn Stock: 5446MAX9032ASA+T Datasheet

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MAX989ESA+

Analog Devices Inc./Maxim IntegratedIn Stock: 3279MAX989ESA+ Datasheet

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MAX989ESA+T

Analog Devices Inc./Maxim IntegratedIn Stock: 17235MAX989ESA+T Datasheet

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MAX991ESA+

Analog Devices Inc./Maxim IntegratedIn Stock: 3470MAX991ESA+ Datasheet

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MAX991ESA+T

Analog Devices Inc./Maxim IntegratedIn Stock: 6209MAX991ESA+T Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the BU7252F-E2 are qualified based on the following electrical and mechanical criteria:

Critical Matching Parameters:

• Dual-channel comparator configuration (2 elements)
• Push-pull or compatible output stage capable of sourcing and sinking current
• Supply voltage range compatibility with 1.8V to 5.5V single supply operation
• 8-pin SOIC surface mount package with equivalent pinout
• Operating temperature range of -40°C to 85°C minimum
• ROHS3 compliance and active product status

Acceptable Variation Ranges:

• Input offset voltage: up to 5mV @ rated voltage (tighter than original 11mV specification)
• Propagation delay: up to 450ns (within acceptable switching speed tolerance)
• Quiescent current: up to 96µA (within low-power application requirements)
• CMRR/PSRR: minimum 80dB (maintains noise rejection performance)

Parts meeting these criteria are listed as parametric equivalents or similar alternatives based on their electrical performance alignment with the BU7252F-E2.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility):

MAX9032ASA+ and MAX9032ASA+T are the closest functional equivalents to the BU7252F-E2. Both devices feature push-pull output configuration with rail-to-rail capability, matching the output stage topology of the original part. These devices operate within the 2.5V to 5.5V supply range, which overlaps the BU7252F-E2 operating window. Quiescent current of 55µA is within acceptable tolerance of the 65µA specification. Propagation delay of 228ns is significantly faster than the 550ns maximum of the original part, providing improved switching performance. Both variants are ROHS3 compliant and actively produced.

Secondary Substitutes (Functional Equivalents):

MAX989ESA+, MAX989ESA+T, MAX991ESA+, and MAX991ESA+T provide dual-channel comparator functionality with push-pull output capability. These devices support the required 2.5V to 5.5V supply range and maintain -40°C to 85°C operating temperature compatibility. Input offset voltage of 5mV is tighter than the BU7252F-E2 specification. Propagation delays of 450ns (MAX989 series) and 210ns (MAX991 series) fall within acceptable switching speed parameters. All variants are ROHS3 compliant and actively produced. MAX989ESA+T and MAX991ESA+T are available in tape and reel packaging for high-volume applications.

Alternative Consideration:

MAX9022ASA+ and MAX9022ASA+T offer dual-channel comparator functionality with CMOS and TTL output options. These devices feature superior input offset voltage of 1mV and extended operating temperature range to 125°C. However, quiescent current of 5µA and propagation delay of 8µs represent significant departures from the BU7252F-E2 performance profile. Selection of these parts should be limited to applications where ultra-low quiescent current is prioritized over switching speed.

Frequently Asked Questions (FAQ)

Q: Can MAX9022ASA+ directly replace BU7252F-E2 in existing designs?

A: MAX9022ASA+ is mechanically compatible through 8-SOIC packaging but exhibits significantly different electrical characteristics. The 8µs propagation delay is substantially slower than the BU7252F-E2 550ns specification, making it unsuitable for time-critical comparison applications. The 5µA quiescent current represents a 92% reduction from the original 65µA specification, which may affect circuit biasing assumptions. Electrical verification is required before substitution.

Q: What is the primary difference between MAX9032ASA+ and MAX989ESA+ for BU7252F-E2 replacement?

A: MAX9032ASA+ features push-pull output with rail-to-rail capability and 228ns propagation delay, providing the closest performance match to the BU7252F-E2. MAX989ESA+ offers CMOS, push-pull, and TTL output options with 450ns propagation delay. Both devices support the required supply voltage range and operating temperature. MAX9032ASA+ is preferred when faster switching response is required; MAX989ESA+ is suitable when output flexibility is prioritized.

Q: Are tape and reel packaging variants electrically identical to tube packaging?

A: Yes. Tape and reel variants (identified by +T suffix) are electrically identical to tube packaging variants. The packaging difference affects only the physical delivery format and handling method. Selection between tape and reel or tube packaging depends on assembly process requirements and volume considerations, not electrical performance.

Q: Does the 8-SOIC package size difference between BU7252F-E2 (4.40mm) and substitute parts (3.90mm) affect PCB layout?

A: The 0.50mm width difference represents a minor dimensional variation within standard 8-SOIC package family tolerances. Pin pitch and lead spacing remain identical across all 8-SOIC variants. PCB footprints designed for standard 8-SOIC packages accommodate both dimensions without modification. Physical board space may be slightly reduced with the narrower 3.90mm package variant.

Q: Which substitute part offers the best low-power performance?

A: MAX9022ASA+ and MAX9022ASA+T provide the lowest quiescent current at 5µA, representing a 92% reduction from the BU7252F-E2 65µA specification. This performance advantage is offset by significantly slower propagation delay of 8µs. For applications prioritizing low quiescent current over switching speed, MAX9022 variants are appropriate. For balanced performance, MAX9032ASA+ series maintains 55µA quiescent current with substantially faster 228ns propagation delay.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts—MAX9022, MAX9032, MAX989, and MAX991 series—are ROHS3 compliant and actively produced. Compliance status matches the BU7252F-E2 specification, ensuring regulatory compatibility for applications requiring ROHS certification.