BU7232SF-E2 Equivalent & Substitute Parts

Part Overview

The BU7232SF-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 currently active in production status with 1098 units in stock inventory.

Substitute parts are necessary when the BU7232SF-E2 becomes unavailable, when alternative packaging formats are required for specific PCB layouts, or when design requirements demand enhanced electrical performance characteristics such as lower input offset voltage, faster propagation delay, or improved common-mode rejection ratio.

Key Parameters

Parameter	BU7232SF-E2
Manufacturer	Rohm Semiconductor
Number of Elements	2
Output Type	Push-Pull
Voltage Supply (Single)	1.8V ~ 5.5V
Voltage Supply (Dual)	±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 ~ 105°C
Package	8-SOIC (0.173", 4.40mm Width)
Mounting Type	Surface Mount
Product Status	Active
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the BU7232SF-E2 are qualified based on the following electrical and mechanical compatibility criteria:

Primary Substitution Criteria:

Dual-channel comparator architecture (2 elements)
Push-pull or push-pull with rail-to-rail output capability
Supply voltage range overlap with 1.8V ~ 5.5V single supply specification
Surface mount packaging with 8-pin configuration
General purpose comparator classification
Operating temperature range minimum of -40°C
ROHS3 compliance and active or recently active product status

Allowed Parameter Variations:

Input offset voltage may be lower (improved specification)
Propagation delay may be faster (improved specification)
CMRR and PSRR may be equal or higher (improved specification)
Quiescent current may be lower (improved specification)
Package case dimensions may differ (8-SOIC, 8-UFLGA, 8-TSSOP acceptable)
Operating temperature maximum may extend beyond 105°C
Output current capability may exceed 6mA

Substitute Parts Identified:

AZV3002RL-7 (Diodes Incorporated) — 8-UFLGA package
LMC6762AIM (Texas Instruments) — 8-SOIC package, obsolete status
LMC6762AIMX/NOPB (Texas Instruments) — 8-SOIC package, active status
MAX9022ASA+ (Analog Devices/Maxim) — 8-SOIC package
MAX9022ASA+T (Analog Devices/Maxim) — 8-SOIC package, tape & reel
MAX9022AUA+ (Analog Devices/Maxim) — 8-TSSOP/MSOP package
MAX9032ASA+ (Analog Devices/Maxim) — 8-SOIC package
MAX9032ASA+T (Analog Devices/Maxim) — 8-SOIC package, tape & reel
MAX9032AUA+ (Analog Devices/Maxim) — 8-TSSOP/MSOP package
MAX9032AUA+T (Analog Devices/Maxim) — 8-TSSOP/MSOP package, tape & reel

Parameter Comparison

Part Number	Manufacturer	Package	Supply Voltage	Input Offset (Max)	Quiescent Current (Max)	Propagation Delay (Max)	CMRR / PSRR	Temp Range	Status
BU7232SF-E2	Rohm	8-SOIC (4.40mm)	1.8V ~ 5.5V	11mV @ 3V	25µA	1.7µs	80dB / 80dB	-40°C ~ 105°C	Active
AZV3002RL-7	Diodes Inc.	8-UFLGA	1.6V ~ 5.5V	30mV	6µA (Typ)	0.8µs	70dB / 80dB	-40°C ~ 85°C	Active
LMC6762AIM	Texas Instruments	8-SOIC (3.90mm)	2.7V ~ 15V	5mV @ 5V	20µA	10µs	75dB / 80dB	-40°C ~ 85°C	Obsolete
LMC6762AIMX/NOPB	Texas Instruments	8-SOIC (3.90mm)	2.7V ~ 15V	5mV @ 5V	20µA	10µs	75dB / 80dB	-40°C ~ 85°C	Active
MAX9022ASA+	Analog Devices/Maxim	8-SOIC (3.90mm)	2.5V ~ 5.5V	1mV @ 5V	5µA	8µs	100dB / 80dB	-40°C ~ 125°C	Active
MAX9022ASA+T	Analog Devices/Maxim	8-SOIC (3.90mm)	2.5V ~ 5.5V	1mV @ 5V	5µA	8µs	100dB / 80dB	-40°C ~ 125°C	Active
MAX9022AUA+	Analog Devices/Maxim	8-TSSOP/MSOP (3.00mm)	2.5V ~ 5.5V	1mV @ 5V	5µA	8µs	100dB / 80dB	-40°C ~ 125°C	Active
MAX9032ASA+	Analog Devices/Maxim	8-SOIC (3.90mm)	2.5V ~ 5.5V	1mV @ 5V	55µA	228ns	100dB / 100dB	-40°C ~ 125°C	Active
MAX9032ASA+T	Analog Devices/Maxim	8-SOIC (3.90mm)	2.5V ~ 5.5V	1mV @ 5V	55µA	228ns	100dB / 100dB	-40°C ~ 125°C	Active
MAX9032AUA+	Analog Devices/Maxim	8-TSSOP/MSOP (3.00mm)	2.5V ~ 5.5V	1mV @ 5V	55µA	228ns	100dB / 100dB	-40°C ~ 125°C	Active
MAX9032AUA+T	Analog Devices/Maxim	8-TSSOP/MSOP (3.00mm)	2.5V ~ 5.5V	1mV @ 5V	55µA	228ns	100dB / 100dB	-40°C ~ 125°C	Active

Engineering Selection Recommendations

Direct Package Replacement (8-SOIC): The MAX9032ASA+T and MAX9032ASA+ offer direct 8-SOIC package compatibility with the BU7232SF-E2. Both parts are active in production status with ROHS3 compliance and MSL rating of 1. The MAX9032 series provides superior electrical performance with 100dB CMRR, 100dB PSRR, and significantly faster propagation delay of 228ns compared to 1.7µs. Supply voltage range of 2.5V to 5.5V encompasses the BU7232SF-E2 operating window. Extended operating temperature to 125°C provides additional margin beyond the original specification.

Compact Package Alternative (8-TSSOP/MSOP): The MAX9032AUA+T and MAX9032AUA+ provide equivalent electrical performance in a smaller 8-TSSOP/MSOP footprint (3.00mm width versus 4.40mm). These parts are suitable for space-constrained PCB layouts while maintaining full functional compatibility. Active production status and ROHS3 compliance are confirmed.

Texas Instruments Rail-to-Rail Option (8-SOIC): The LMC6762AIMX/NOPB is an active production part offering rail-to-rail output capability in standard 8-SOIC packaging. This device supports extended supply voltage range of 2.7V to 15V and features lower input offset voltage of 5mV. The wider voltage range accommodates higher supply applications beyond the BU7232SF-E2 specification.

Diodes Incorporated Compact Alternative (8-UFLGA): The AZV3002RL-7 provides a miniaturized 8-UFLGA package option with faster propagation delay of 0.8µs. This part is active in production with 6400 units in stock. The compact package format requires PCB layout redesign but offers space savings for high-density applications.

Obsolete Part Consideration: The LMC6762AIM is marked as obsolete and should not be selected for new designs despite superior electrical specifications. The active variant LMC6762AIMX/NOPB is the recommended alternative from this product line.

Frequently Asked Questions (FAQ)

Q: Can MAX9022 series parts substitute for BU7232SF-E2? A: MAX9022 parts feature CMOS output with rail-to-rail capability rather than standard push-pull output. While electrically compatible in most applications, the output stage topology differs. MAX9022ASA+, MAX9022ASA+T, and MAX9022AUA+ are all active production parts with superior CMRR (100dB) and lower input offset voltage (1mV). Selection depends on specific output drive requirements.

Q: What is the difference between tape & reel (TR) and cut tape (CT) packaging? A: Tape & reel packaging (TR suffix) is supplied on continuous reels for automated assembly equipment. Cut tape (CT) packaging is supplied in individual tape segments. Both contain identical die and electrical specifications. Selection is based on manufacturing process requirements. The BU7232SF-E2 is supplied in tape & reel format.

Q: Are all substitute parts ROHS3 compliant? A: All identified substitute parts carry ROHS3 compliance certification. Moisture sensitivity levels vary: most parts are MSL 1 (unlimited), while AZV3002RL-7 is MSL 3 (168 hours). MSL rating affects storage and handling requirements prior to reflow soldering.

Q: Which substitute offers the fastest response time? A: The MAX9032 series (MAX9032ASA+, MAX9032ASA+T, MAX9032AUA+, MAX9032AUA+T) provides the fastest propagation delay at 228ns, compared to 1.7µs for the BU7232SF-E2. The AZV3002RL-7 offers 0.8µs propagation delay as an intermediate option.

Q: Can I use MAX9032 parts in low-voltage applications below 2.5V? A: No. The MAX9032 series minimum supply voltage is 2.5V, which exceeds the BU7232SF-E2 lower limit of 1.8V. For applications requiring operation below 2.5V, the AZV3002RL-7 (1.6V minimum) or LMC6762 series (2.7V minimum) should be evaluated based on specific voltage requirements.

Q: What is the inventory status for substitute parts? A: Current inventory levels are: AZV3002RL-7 (6400 pcs), LMC6762AIMX/NOPB (4341 pcs), MAX9022ASA+ (1483 pcs), MAX9022ASA+T (3250 pcs), MAX9022AUA+ (825 pcs), MAX9032ASA+ (2447 pcs), MAX9032ASA+T (5400 pcs), MAX9032AUA+ (2400 pcs), MAX9032AUA+T (10100 pcs). All parts are new original stock.

Q: Do package dimension differences affect PCB layout? A: Yes. The BU7232SF-E2 uses 8-SOIC with 4.40mm width. Substitute parts use 8-SOIC (3.90mm), 8-TSSOP/MSOP (3.00mm), or 8-UFLGA packages. Footprint changes require PCB redesign. Pin pitch and lead configuration also differ between package types. Verify mechanical compatibility before layout implementation.

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