BU7232FVM-TR Equivalent & Substitute Parts

Part Overview

The BU7232FVM-TR is a dual-channel general purpose comparator manufactured by Rohm Semiconductor in 8-MSOP surface mount packaging. This active product 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 device is designed for general purpose comparison applications requiring low input offset voltage and moderate propagation delay characteristics. Substitute parts are identified based on functional equivalence in comparator topology, output stage configuration, and electrical parameter compatibility within specified operating ranges.

Key Parameters

Parameter	BU7232FVM-TR
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	8-MSOP (0.110", 2.80mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the BU7232FVM-TR are selected based on the following electrical and mechanical compatibility criteria:

Primary Substitution Criteria:

Dual-channel comparator configuration (2 elements)
Push-pull or push-pull with rail-to-rail output capability
Supply voltage range overlap with 1.8V to 5.5V single supply operation
Input offset voltage specification of 5mV or lower
Operating temperature range including -40°C to 85°C minimum
Surface mount packaging with 8-pin configuration
ROHS3 compliance and MSL 1 rating

Secondary Compatibility Factors:

Propagation delay performance suitable for general purpose applications
Input bias current specifications compatible with high-impedance input circuits
Quiescent current within acceptable power budget constraints

Substitute parts are grouped into two functional categories: (1) Push-pull comparators with standard rail-to-rail output, and (2) CMOS push-pull comparators with enhanced rail-to-rail and TTL output compatibility. Package variations (8-SOIC, 8-TSSOP/8-MSOP, SOT-23-8, 8-uMAX/uSOP) are considered equivalent for PCB layout redesign scenarios.

Parameter Comparison

Parameter	BU7232FVM-TR	LMC6762AIMX/NOPB	MAX9022AUA+T	MAX9032AUA+T	MAX989EUA+T
Manufacturer	Rohm Semiconductor	Texas Instruments	Analog Devices Inc./Maxim	Analog Devices Inc./Maxim	Analog Devices Inc./Maxim
Number of Comparators	2	2	2	2	2
Output Type	Push-Pull	Push-Pull, Rail-to-Rail	CMOS, Rail-to-Rail, TTL	Push-Pull, Rail-to-Rail	CMOS, Push-Pull, Rail-to-Rail, TTL
Supply Voltage (Single)	1.8V ~ 5.5V	2.7V ~ 15V	2.5V ~ 5.5V	2.5V ~ 5.5V	2.5V ~ 5.5V
Input Offset Voltage (Max)	11mV @ 3V	5mV @ 5V	1mV @ 5V	1mV @ 5V	5mV @ 5.5V
Input Bias Current (Max)	1pA @ 3V	0.04pA @ 5V	0.003µA @ 5V	0.008µA @ 5V	1pA @ 5.5V
Quiescent Current (Max)	25µA	20µA	5µA	55µA	24µA
CMRR / PSRR (Typ)	80dB / 80dB	75dB / 80dB	100dB / 80dB	100dB / 100dB	80dB / 80dB
Propagation Delay (Max)	1.7µs	10µs	8µs	228ns	450ns
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 85°C
Package / Case	8-MSOP (0.110", 2.80mm)	8-SOIC (0.154", 3.90mm)	8-TSSOP, 8-MSOP (0.118", 3.00mm)	8-TSSOP, 8-MSOP (0.118", 3.00mm)	8-TSSOP, 8-MSOP (0.118", 3.00mm)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

LMC6762AIMX/NOPB (Texas Instruments): This substitute provides push-pull rail-to-rail output with extended supply voltage range (2.7V to 15V). The 8-SOIC package requires PCB layout modification. Input offset voltage of 5mV meets substitution criteria. Propagation delay of 10µs is slower than the BU7232FVM-TR. Suitable for applications where extended supply voltage range is beneficial and propagation delay is not timing-critical.

MAX9022 Series (Analog Devices Inc./Maxim Integrated): Available in multiple package options (SOT-23-8, 8-SOIC, 8-uMAX/uSOP). Features CMOS push-pull output with rail-to-rail and TTL compatibility. Input offset voltage of 1mV and quiescent current of 5µA provide superior performance characteristics. Operating temperature range extends to 125°C. Hysteresis of 4mV provides noise immunity. Suitable for applications requiring lower power consumption and extended temperature operation.

MAX9032 Series (Analog Devices Inc./Maxim Integrated): Push-pull rail-to-rail output with 1mV input offset voltage and 228ns propagation delay. Superior CMRR and PSRR (100dB each) compared to BU7232FVM-TR. Quiescent current of 55µA is higher. Operating temperature range extends to 125°C. Hysteresis of 4mV. Suitable for high-speed applications and extended temperature environments.

MAX989 Series (Analog Devices Inc./Maxim Integrated): CMOS push-pull output with TTL compatibility. Input offset voltage of 5mV and propagation delay of 450ns. Quiescent current of 24µA. Operating temperature range -40°C to 85°C matches BU7232FVM-TR. Hysteresis of ±3mV. Suitable for TTL-compatible systems requiring moderate speed performance.

All substitute parts maintain ROHS3 compliance and MSL 1 rating. Package selection depends on PCB layout constraints and available board space.

Frequently Asked Questions (FAQ)

Q: Can MAX9032AUA+T directly replace BU7232FVM-TR without circuit modification?

A: MAX9032AUA+T is electrically compatible as a direct replacement. Both devices feature dual-channel push-pull comparators with 8-pin surface mount packaging. The 8-TSSOP/8-MSOP package of MAX9032AUA+T is mechanically compatible with BU7232FVM-TR's 8-MSOP footprint. Pin configuration must be verified against device datasheets. Supply voltage range of MAX9032AUA+T (2.5V to 5.5V) overlaps with BU7232FVM-TR (1.8V to 5.5V), but does not support operation below 2.5V.

Q: What is the key difference between MAX9022 and MAX9032 series?

A: Both series feature dual-channel comparators with CMOS push-pull output and rail-to-rail capability. MAX9022 series has quiescent current of 5µA and propagation delay of 8µs. MAX9032 series has quiescent current of 55µA and propagation delay of 228ns. MAX9032 is optimized for higher-speed applications, while MAX9022 is optimized for lower power consumption.

Q: Is LMC6762AIMX/NOPB suitable for 1.8V supply operation?

A: No. LMC6762AIMX/NOPB minimum supply voltage is 2.7V. It cannot operate at 1.8V. This substitute is not suitable for applications requiring 1.8V single supply operation.

Q: What packaging options are available for MAX9032 substitute?

A: MAX9032 is available in three package options: 8-SOIC (0.154", 3.90mm width), 8-TSSOP/8-MSOP (0.118", 3.00mm width), and 8-uMAX/uSOP. The 8-TSSOP/8-MSOP package is mechanically compatible with BU7232FVM-TR's 8-MSOP footprint. The 8-SOIC package requires PCB layout redesign.

Q: Are all substitute parts rated for -40°C to 85°C operating temperature?

A: BU7232FVM-TR, LMC6762AIMX/NOPB, and MAX989 series are rated for -40°C to 85°C. MAX9022 and MAX9032 series extend to -40°C to 125°C. For applications limited to -40°C to 85°C, all listed substitutes are suitable.

Q: What is the significance of hysteresis in MAX9022 and MAX9032 devices?

A: Hysteresis of 4mV in MAX9022 and MAX9032 series provides noise immunity by creating separate threshold voltages for rising and falling input transitions. BU7232FVM-TR does not specify hysteresis. Hysteresis can prevent oscillation in noisy environments but may affect precision threshold applications.

Q: Can I use MAX989EUA+T in a circuit designed for BU7232FVM-TR?

A: MAX989EUA+T is functionally compatible with dual-channel push-pull output and 8-pin surface mount packaging. Supply voltage range (2.5V to 5.5V) overlaps with BU7232FVM-TR. Input offset voltage of 5mV and propagation delay of 450ns are within acceptable ranges. TTL output compatibility provides additional flexibility. Pin configuration must be verified for direct substitution.

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