BU7444F-E2 Equivalent & Substitute Parts

Part Overview

The BU7444F-E2 is a CMOS 4-circuit linear amplifier manufactured by Rohm Semiconductor in a 14-SOP surface mount package. This device is classified as "Not For New Designs," indicating it has reached end-of-life status. The part operates across a supply voltage range of 1.7 V to 5.5 V with a slew rate of 0.3 V/µs and gain bandwidth product of 600 kHz. Due to its discontinued status, equivalent substitute parts from active product lines are necessary for ongoing production and maintenance applications requiring compatible CMOS 4-circuit amplifier functionality.

Substiute Parts

BU7444F-E2

Rohm SemiconductorIn Stock: 1115BU7444F-E2 Datasheet

Current PartRFQ

AD8609ARZ

Analog Devices Inc.In Stock: 12422AD8609ARZ Datasheet

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AD8609ARZ-REEL7

Analog Devices Inc.In Stock: 2447AD8609ARZ-REEL7 Datasheet

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AD8619ARZ

Analog Devices Inc.In Stock: 3271AD8619ARZ Datasheet

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AD8619ARZ-REEL7

Analog Devices Inc.In Stock: 3850AD8619ARZ-REEL7 Datasheet

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AD8619WARZ-R7

Analog Devices Inc.In Stock: 1518AD8619WARZ-R7 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the BU7444F-E2 is determined by the following critical parameters:

Functional Equivalence Criteria:

• Amplifier Type: CMOS
• Number of Circuits: 4
• Package Type: 14-pin SOIC configuration
• Mounting Type: Surface Mount

Electrical Compatibility Parameters:

• Supply voltage range must encompass or overlap with 1.7 V to 5.5 V
• Slew rate, gain bandwidth product, input bias current, and output current capacity must be suitable for the application
• Operating temperature range must support the required thermal environment

Compliance Requirements:

• RoHS3 compliance
• Moisture Sensitivity Level 1 (Unlimited)

The substitute parts listed below are all Analog Devices Inc. CMOS 4-circuit amplifiers in 14-SOIC packages with active product status. These devices maintain functional compatibility through identical circuit count, package footprint compatibility, and overlapping electrical specifications. All substitutes are RoHS3 compliant with MSL 1 rating.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes: AD8619ARZ and AD8619ARZ-REEL7

The AD8619ARZ and AD8619ARZ-REEL7 are the preferred substitutes for the BU7444F-E2. Both devices are manufactured by Analog Devices Inc. with active product status, ensuring long-term availability and supply chain stability. These parts maintain the 4-circuit CMOS amplifier configuration in a 14-SOIC package footprint compatible with the original design. The AD8619ARZ-REEL7 variant is packaged in Tape & Reel format, matching the original BU7444F-E2 packaging method, which simplifies integration into existing assembly processes.

All substitute parts are RoHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity rating, meeting the compliance requirements of the original part. The extended operating temperature range of -40°C to 125°C in the substitute parts provides enhanced thermal performance compared to the original -40°C to 85°C specification.

Secondary Substitutes: AD8609ARZ and AD8609ARZ-REEL7

The AD8609ARZ and AD8609ARZ-REEL7 offer alternative substitution with identical functional architecture. These devices feature lower input offset voltage (12 µV versus 400 µV in the AD8619 series) and higher output current capability (70 mA per channel versus 80 mA), making them suitable for applications requiring enhanced precision and drive capability.

Packaging Considerations

The substitute parts use a 14-SOIC package with 0.154" (3.90mm) width, compared to the original 0.173" (4.40mm) width. This dimensional difference is within standard PCB layout tolerances for SOIC packages and does not require design modifications. The footprint remains electrically and mechanically compatible for direct replacement on existing circuit boards.

Supply Voltage Compatibility

The substitute parts operate across 1.8 V to 5 V, compared to the original 1.7 V to 5.5 V range. Applications operating at 1.7 V or below, or above 5 V, require design review to confirm compatibility with the substitute parts' reduced supply voltage window.

Frequently Asked Questions (FAQ)

Q: Can the AD8619ARZ directly replace the BU7444F-E2 without PCB modifications?

A: Yes. The AD8619ARZ maintains the same 14-pin SOIC package configuration and pin assignment as the BU7444F-E2. The physical footprint difference (0.154" versus 0.173" width) is within standard SOIC tolerance and does not require PCB layout changes. Direct socket replacement is possible.

Q: What is the difference between AD8619ARZ and AD8619ARZ-REEL7?

A: Both parts are electrically identical. The primary difference is packaging: AD8619ARZ is supplied in Tube format, while AD8619ARZ-REEL7 is supplied in Tape & Reel (TR) format. The TR variant matches the original BU7444F-E2 packaging method and is recommended for high-volume assembly operations.

Q: Why do the substitute parts have lower slew rate (0.1 V/µs) compared to the original (0.3 V/µs)?

A: The substitute parts are designed for lower power consumption and reduced noise characteristics. Applications requiring the original 0.3 V/µs slew rate should be evaluated against the substitute parts' 0.1 V/µs specification to confirm suitability for the intended signal bandwidth and transient response requirements.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts (AD8609ARZ, AD8609ARZ-REEL7, AD8619ARZ, AD8619ARZ-REEL7, and AD8619WARZ-R7) are RoHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, matching the compliance profile of the original BU7444F-E2.

Q: What is the supply voltage compatibility window for substitution?

A: The BU7444F-E2 operates at 1.7 V to 5.5 V, while all substitute parts operate at 1.8 V to 5 V. Applications operating at exactly 1.7 V or above 5 V are outside the substitute parts' specification window and require design verification or alternative component selection.

Q: Which substitute part offers the best input offset voltage performance?

A: The AD8609ARZ and AD8609ARZ-REEL7 offer the lowest input offset voltage at 12 µV, compared to 400 µV in the AD8619 series and 1 mV in the original BU7444F-E2. For precision analog applications requiring minimal offset drift, the AD8609 variants are the preferred choice.

Q: Can I use the AD8609ARZ in applications originally designed for the BU7444F-E2?

A: Yes. The AD8609ARZ maintains the same 4-circuit CMOS amplifier architecture and 14-SOIC package configuration. The lower input offset voltage and higher output current capability of the AD8609ARZ provide enhanced performance characteristics suitable for the original application requirements.

Q: What is the inventory status of the substitute parts?

A: All substitute parts are in active production with confirmed inventory: AD8609ARZ (12,400 pcs), AD8609ARZ-REEL7 (2,400 pcs), AD8619ARZ (3,225 pcs), AD8619ARZ-REEL7 (3,822 pcs), and AD8619WARZ-R7 (1,504 pcs). These quantities support both prototype and production-volume requirements.