BU7232F-E2 Equivalent & Substitute Parts

Part Overview

The BU7232F-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), making it suitable for low-voltage analog signal comparison applications. The part is currently in active production status with 2400 units in stock inventory.

Substitute parts are necessary when the BU7232F-E2 becomes unavailable, when alternative packaging formats are required for manufacturing compatibility, or when design specifications allow for enhanced performance characteristics available in alternative devices.

Key Parameters

Parameter	BU7232F-E2 Specification
Manufacturer	Rohm Semiconductor
Number of Comparators	2
Output Type	Push-Pull
Supply Voltage (Single/Dual)	1.8V ~ 5.5V / ±0.9V ~ 2.75V
Input Offset Voltage (Max)	11mV @ 3V
Input Bias Current (Max)	1pA @ 3V
Output Current (Typ)	6mA @ 3V
Quiescent Current (Max)	25µA
CMRR / PSRR (Typ)	80dB / 80dB
Propagation Delay (Max)	1.7µs
Operating Temperature	-40°C ~ 85°C
Package / Case	8-SOIC (0.173", 4.40mm Width)
Mounting Type	Surface Mount
Product Status	Active
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the BU7232F-E2 are classified based on the following critical parameters that determine functional compatibility:

Primary Compatibility Criteria:

Dual-channel comparator configuration (2 elements)
Push-pull output capability
Supply voltage overlap with 1.8V ~ 5.5V range
Surface mount 8-pin package format
Operating temperature range minimum of -40°C

Substitution Categories:

Category A: Direct Package Equivalents (8-SOIC) Parts maintaining the same 8-SOIC package footprint with push-pull output and overlapping supply voltage specifications. These include MAX9022ASA+, MAX9022ASA+T, MAX9032ASA+, MAX9032ASA+T, MAX989ESA+, and MAX989ESA+T.

Category B: Alternative Package Format (8-TSSOP/8-MSOP) Parts with identical electrical specifications but different surface mount package geometry. These include MAX9022AUA+ and MAX989EUA+, suitable when board layout accommodates smaller package dimensions.

Category C: Extended Voltage Range (2.7V ~ 15V) Parts with broader supply voltage specifications including the BU7232F-E2 operating range. These include LMC6762AIM and LMC6762BIMX/NOPB, offering compatibility with extended voltage applications.

Parameter Comparison

Part Number	Manufacturer	Package	Supply Voltage	Input Offset (Max)	Output Type	Quiescent Current (Max)	Propagation Delay (Max)	Temp Range	Product Status
BU7232F-E2	Rohm	8-SOIC (4.40mm)	1.8V~5.5V / ±0.9V~2.75V	11mV @ 3V	Push-Pull	25µA	1.7µs	-40°C ~ 85°C	Active
MAX989ESA+	Analog Devices	8-SOIC (3.90mm)	2.5V~5.5V / ±1.25V~2.75V	5mV @ 5.5V	Push-Pull, Rail-to-Rail, TTL	24µA	450ns	-40°C ~ 85°C	Active
MAX989ESA+T	Analog Devices	8-SOIC (3.90mm)	2.5V~5.5V / ±1.25V~2.75V	5mV @ 5.5V	Push-Pull, Rail-to-Rail, TTL	24µA	450ns	-40°C ~ 85°C	Active
MAX9022ASA+	Analog Devices	8-SOIC (3.90mm)	2.5V~5.5V / ±1.25V~2.75V	1mV @ 5V	CMOS, Rail-to-Rail, TTL	5µA	8µs	-40°C ~ 125°C	Active
MAX9022ASA+T	Analog Devices	8-SOIC (3.90mm)	2.5V~5.5V / ±1.25V~2.75V	1mV @ 5V	CMOS, Rail-to-Rail, TTL	5µA	8µs	-40°C ~ 125°C	Active
MAX9022AUA+	Analog Devices	8-TSSOP/MSOP (3.00mm)	2.5V~5.5V / ±1.25V~2.75V	1mV @ 5V	CMOS, Rail-to-Rail, TTL	5µA	8µs	-40°C ~ 125°C	Active
MAX9032ASA+	Analog Devices	8-SOIC (3.90mm)	2.5V~5.5V	1mV @ 5V	Push-Pull, Rail-to-Rail	55µA	228ns	-40°C ~ 125°C	Active
MAX9032ASA+T	Analog Devices	8-SOIC (3.90mm)	2.5V~5.5V	1mV @ 5V	Push-Pull, Rail-to-Rail	55µA	228ns	-40°C ~ 125°C	Active
LMC6762AIM	Texas Instruments	8-SOIC (3.90mm)	2.7V~15V / ±1.35V~7.5V	5mV @ 5V	Push-Pull, Rail-to-Rail	20µA	10µs	-40°C ~ 85°C	Obsolete
LMC6762BIMX/NOPB	Texas Instruments	8-SOIC (3.90mm)	2.7V~15V / ±1.35V~7.5V	15mV @ 5V	Push-Pull, Rail-to-Rail	20µA	10µs	-40°C ~ 85°C	Active
MAX989EUA+	Analog Devices	8-TSSOP/MSOP (3.00mm)	2.5V~5.5V / ±1.25V~2.75V	5mV @ 5.5V	Push-Pull, Rail-to-Rail, TTL	24µA	450ns	-40°C ~ 85°C	Active

Engineering Selection Recommendations

For Direct Pin-Compatible Replacement (8-SOIC Package):

MAX989ESA+ and MAX989ESA+T are the primary substitutes, offering identical push-pull output configuration with improved propagation delay (450ns vs 1.7µs) and lower input offset voltage (5mV vs 11mV). Both parts are in active production status with ROHS3 compliance. The tape & reel variant (MAX989ESA+T) provides 17,129 units in inventory, ensuring supply continuity.

For Enhanced Performance Requirements:

MAX9032ASA+ and MAX9032ASA+T provide superior specifications including 228ns propagation delay, 1mV input offset voltage, and extended operating temperature range to 125°C. These parts maintain push-pull output and 8-SOIC package compatibility. Both are active production devices with ROHS3 compliance.

For Extended Voltage Range Applications:

LMC6762BIMX/NOPB supports supply voltages from 2.7V to 15V with dual supply capability up to ±7.5V, accommodating applications requiring broader voltage specifications. This part is in active production with 22,700 units available. LMC6762AIM provides identical electrical specifications but is obsolete status.

For Compact Package Footprint:

MAX9022AUA+ and MAX989EUA+ offer 8-TSSOP/8-MSOP package format (3.00mm width) for space-constrained designs. Both maintain active production status with ROHS3 compliance and full temperature range operation to 125°C.

Compliance Considerations:

All recommended substitute parts maintain ROHS3 compliance, MSL Level 1 (unlimited moisture sensitivity), and EAR99 export classification matching the original BU7232F-E2 specifications.

Frequently Asked Questions (FAQ)

Q: Can MAX989ESA+ directly replace BU7232F-E2 without circuit modification?

A: MAX989ESA+ is electrically compatible within the overlapping supply voltage range (2.5V ~ 5.5V). The 8-SOIC package footprint is identical for PCB mounting. However, the reduced package width (3.90mm vs 4.40mm) requires verification of board layout spacing. Input offset voltage improvement (5mV vs 11mV) and faster propagation delay (450ns vs 1.7µs) may require circuit validation in timing-critical applications.

Q: What is the difference between MAX989ESA+ and MAX989ESA+T?

A: Both parts are electrically identical. The suffix designates packaging format: MAX989ESA+ is supplied in tube packaging, while MAX989ESA+T is supplied in tape & reel format. Selection depends on manufacturing assembly requirements and inventory management preferences.

Q: Why is LMC6762AIM listed as obsolete?

A: LMC6762AIM is no longer in active production by Texas Instruments. LMC6762BIMX/NOPB is the active production equivalent with identical electrical specifications and extended voltage range capability.

Q: Can I use MAX9022ASA+ in applications requiring push-pull output?

A: MAX9022ASA+ features CMOS output with rail-to-rail capability rather than dedicated push-pull configuration. While functionally compatible for many applications, circuits specifically designed for push-pull output characteristics should use MAX989ESA+ or MAX9032ASA+ variants.

Q: What are the package dimension differences between 8-SOIC and 8-TSSOP?

A: 8-SOIC packages measure 0.154" to 0.173" width (3.90mm to 4.40mm), while 8-TSSOP/8-MSOP packages measure 0.118" width (3.00mm). TSSOP variants are approximately 30% narrower, requiring PCB layout redesign for implementation.

Q: Are all substitute parts ROHS3 compliant?

A: All listed substitute parts maintain ROHS3 compliance status matching the original BU7232F-E2 specification, ensuring regulatory compatibility for end-use applications.

Q: Which substitute offers the lowest quiescent current?

A: MAX9022ASA+ and MAX9022ASA+T feature the lowest quiescent current at 5µA maximum, compared to 25µA for BU7232F-E2. This specification is relevant for battery-powered or low-power standby applications.

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