BU7252SF-E2 Equivalent & Substitute Parts

Part Overview

The BU7252SF-E2 is a dual-channel general purpose comparator manufactured by Rohm Semiconductor in 8-SOP surface mount packaging. This active component operates across a wide supply voltage range of 1.8V to 5.5V (single supply) or ±0.9V to ±2.75V (dual supply), with push-pull output configuration. The device is classified as Active product status and carries full RoHS3 compliance with MSL Level 1 rating. Substitute parts are identified when equivalent electrical performance, package compatibility, and operational specifications align with application requirements.

Key Parameters

Parameter	BU7252SF-E2 Specification
Manufacturer	Rohm Semiconductor
Package Type	8-SOP (0.173", 4.40mm Width)
Number of Comparators	2
Output Type	Push-Pull
Supply Voltage Range	1.8V ~ 5.5V (Single), ±0.9V ~ ±2.75V (Dual)
Input Offset Voltage (Max)	11mV @ 3V
Input Bias Current (Max)	1pA @ 3V
Output Current (Typ)	6mA @ 3V
Quiescent Current (Max)	65µA
CMRR / PSRR (Typ)	80dB / 80dB
Propagation Delay (Max)	550ns
Operating Temperature	-40°C ~ 105°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the BU7252SF-E2 are qualified based on the following criteria:

Electrical Compatibility Requirements:

Dual-channel comparator configuration (2 elements)
Push-pull or compatible output stage
Supply voltage range overlap with 1.8V ~ 5.5V
Operating temperature range minimum of -40°C
Input offset voltage and propagation delay within acceptable application margins

Package Compatibility:

8-pin surface mount packages (8-SOP, 8-SOIC, 8-VSSOP, 8-MiniSO)
Pin-compatible or functionally equivalent pinout
Similar thermal and mechanical characteristics

Compliance & Status:

Active product status
RoHS3 compliance
MSL Level 1 rating

The following substitute parts meet these criteria across different manufacturers and packaging options.

Parameter Comparison

Part Number	Manufacturer	Package	Output Type	Supply Voltage	Input Offset (Max)	Quiescent Current (Max)	Propagation Delay (Max)	Operating Temp
BU7252SF-E2	Rohm Semiconductor	8-SOP (4.40mm)	Push-Pull	1.8V ~ 5.5V	11mV @ 3V	65µA	550ns	-40°C ~ 105°C
MAX9022ASA+	Analog Devices/Maxim	8-SOIC (3.90mm)	CMOS, Rail-to-Rail, TTL	2.5V ~ 5.5V	1mV @ 5V	5µA	8µs	-40°C ~ 125°C
MAX9022ASA+T	Analog Devices/Maxim	8-SOIC (3.90mm)	CMOS, Rail-to-Rail, TTL	2.5V ~ 5.5V	1mV @ 5V	5µA	8µs	-40°C ~ 125°C
MAX9032ASA+	Analog Devices/Maxim	8-SOIC (3.90mm)	Push-Pull, Rail-to-Rail	2.5V ~ 5.5V	1mV @ 5V	55µA	228ns	-40°C ~ 125°C
MAX9032ASA+T	Analog Devices/Maxim	8-SOIC (3.90mm)	Push-Pull, Rail-to-Rail	2.5V ~ 5.5V	1mV @ 5V	55µA	228ns	-40°C ~ 125°C
MAX989ESA+	Analog Devices/Maxim	8-SOIC (3.90mm)	CMOS, Push-Pull, Rail-to-Rail, TTL	2.5V ~ 5.5V	5mV @ 5.5V	24µA	450ns	-40°C ~ 85°C
MAX989ESA+T	Analog Devices/Maxim	8-SOIC (3.90mm)	CMOS, Push-Pull, Rail-to-Rail, TTL	2.5V ~ 5.5V	5mV @ 5.5V	24µA	450ns	-40°C ~ 85°C
MAX991ESA+	Analog Devices/Maxim	8-SOIC (3.90mm)	CMOS, Push-Pull, Rail-to-Rail, TTL	2.5V ~ 5.5V	5mV @ 5.5V	96µA	210ns	-40°C ~ 85°C
MAX991ESA+T	Analog Devices/Maxim	8-SOIC (3.90mm)	CMOS, Push-Pull, Rail-to-Rail, TTL	2.5V ~ 5.5V	5mV @ 5.5V	96µA	210ns	-40°C ~ 85°C
TLV3202AIDGKR	Texas Instruments	8-VSSOP (3.00mm)	Push-Pull	2.7V ~ 5.5V	5mV @ 5V	50µA	50ns	-40°C ~ 125°C
TS3022IST	STMicroelectronics	8-MiniSO (3.00mm)	Push-Pull	1.8V ~ 5V	8mV @ 5V	90µA	105ns	-40°C ~ 125°C

Engineering Selection Recommendations

Maxim Integrated MAX9032 Series (MAX9032ASA+, MAX9032ASA+T): These parts provide the closest electrical match to the BU7252SF-E2 with push-pull output configuration and superior propagation delay performance (228ns vs. 550ns). Both tube and tape & reel packaging options are available. Operating temperature extends to 125°C. All parts carry RoHS3 compliance and MSL Level 1 rating.

Maxim Integrated MAX989 Series (MAX989ESA+, MAX989ESA+T): These dual-channel comparators feature push-pull output with CMOS and TTL compatibility. Propagation delay of 450ns approaches the BU7252SF-E2 specification. Quiescent current is significantly lower at 24µA. Operating temperature range is -40°C to 85°C. Available in tube and tape & reel packaging with full compliance certifications.

Maxim Integrated MAX991 Series (MAX991ESA+, MAX991ESA+T): These parts offer the fastest propagation delay at 210ns with push-pull output capability. Quiescent current is higher at 96µA. Operating temperature maximum is 85°C. Both packaging formats available with RoHS3 and MSL Level 1 compliance.

Texas Instruments TLV3202AIDGKR: This push-pull comparator delivers the fastest propagation delay at 50ns with extended operating temperature to 125°C. Package is 8-VSSOP (3.00mm width), which is smaller than the original 8-SOP. Supply voltage minimum is 2.7V, which does not cover the full 1.8V lower range of the BU7252SF-E2. RoHS3 and MSL Level 1 compliant.

STMicroelectronics TS3022IST: This push-pull comparator operates across 1.8V to 5V supply range, matching the lower voltage capability of the BU7252SF-E2. Propagation delay is 105ns. Package is 8-MiniSO (3.00mm width). Operating temperature extends to 125°C with full compliance certifications.

Maxim Integrated MAX9022 Series (MAX9022ASA+, MAX9022ASA+T): These CMOS rail-to-rail comparators feature the lowest input offset voltage at 1mV and minimal quiescent current at 5µA. Output type is CMOS/TTL rather than push-pull. Propagation delay is significantly longer at 8µs. Available in tube and tape & reel packaging with RoHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can MAX9032ASA+ directly replace BU7252SF-E2 in all applications?

A: MAX9032ASA+ shares the same dual-channel push-pull comparator architecture and 8-pin SOIC package footprint. However, the package body width differs (3.90mm vs. 4.40mm), which may affect PCB layout compatibility. Electrical specifications are superior or equivalent across all measured parameters. Verify PCB layout constraints before substitution.

Q: What is the key difference between MAX989 and MAX991 series?

A: Both series feature dual-channel push-pull comparators with CMOS/TTL output compatibility. MAX991 delivers faster propagation delay (210ns vs. 450ns) but draws higher quiescent current (96µA vs. 24µA). MAX989 is more power-efficient for battery-operated applications. Both operate to -40°C to 85°C.

Q: Why does TLV3202AIDGKR have a minimum supply voltage of 2.7V instead of 1.8V?

A: TLV3202AIDGKR is specified for 2.7V minimum supply voltage. Applications requiring operation below 2.7V cannot use this part as a substitute for BU7252SF-E2, which operates down to 1.8V.

Q: Are all substitute parts available in tape & reel packaging?

A: Not all. MAX9022ASA+ and MAX9032ASA+ are available in tube packaging only. MAX9022ASA+T, MAX9032ASA+T, MAX989ESA+T, and MAX991ESA+T are available in tape & reel. TLV3202AIDGKR and TS3022IST are supplied in cut tape & Digi-Reel format. Verify packaging availability for production volume requirements.

Q: What is the impact of package size differences on PCB design?

A: BU7252SF-E2 uses 8-SOP with 4.40mm body width. Maxim SOIC variants are 3.90mm width. TLV3202AIDGKR and TS3022IST use 3.00mm width packages (VSSOP and MiniSO respectively). Smaller packages reduce PCB footprint but may require design layout verification. Pin pitch and lead spacing remain compatible across all 8-pin variants.

Q: Which substitute offers the best propagation delay performance?

A: TLV3202AIDGKR provides the fastest propagation delay at 50ns, followed by TS3022IST at 105ns. MAX991 series delivers 210ns. If propagation delay is critical to application timing, these options provide significant improvement over the BU7252SF-E2 specification of 550ns.

Q: Are all parts RoHS3 compliant?

A: Yes. All listed substitute parts carry RoHS3 compliance certification and MSL Level 1 moisture sensitivity rating, matching the environmental compliance profile of BU7252SF-E2.

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