BA8274F-E2 Equivalent & Substitute Parts

Part Overview

The BA8274F-E2 is a 2-channel I2C buffer and redriver IC manufactured by Rohm Semiconductor in 8-SOP packaging. This device is designed for I2C bus signal conditioning and hotswap applications with a supply voltage range of 4.5V to 12V and operating temperature range of -40°C to 85°C. The product is marked as Not For New Designs, making identification of functionally equivalent alternatives necessary for ongoing maintenance, legacy system support, and new design implementations.

Key Parameters

Parameter	BA8274F-E2
Manufacturer	Rohm Semiconductor
Type	Buffer, ReDriver
Number of Channels	2
Applications	I2C
Input/Output	2-Wire Bus
Voltage - Supply	4.5V ~ 12V
Current - Supply	40mA
Operating Temperature	-40°C ~ 85°C
Capacitance - Input	3000 pF
Package / Case	8-SOIC (0.173", 4.40mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)
Product Status	Not For New Designs

Substitute Part Grouping Explanation

Substitution of the BA8274F-E2 is determined by the following critical parameters:

Functional Type: Buffer/ReDriver for I2C applications with 2-channel configuration
Bus Interface: 2-Wire Bus input and output compatibility
Supply Voltage Range: Must accommodate the 4.5V to 12V operating window
Operating Temperature Range: Extended temperature support (-40°C to 85°C) preferred for industrial applications
Package Compatibility: Surface mount packages with equivalent pin counts and footprints
Regulatory Compliance: ROHS3 compliance and REACH unaffected status

The LTC4301 series from Analog Devices Inc. provides direct functional equivalence across multiple package options (8-DFN and 8-MSOP variants). These devices operate as I2C hotswap redrivers with 2-channel configuration and maintain compatibility with the core electrical requirements. The LTC4301 series is available in both commercial (0°C to 70°C) and industrial (-40°C to 85°C) temperature grades, with the industrial variants providing direct thermal compatibility with the BA8274F-E2.

Parameter Comparison

Parameter	BA8274F-E2	LTC4301CDD#PBF	LTC4301CDD#TRPBF	LTC4301CMS8#PBF	LTC4301CMS8#TRPBF	LTC4301IDD#PBF	LTC4301IDD#TRPBF	LTC4301IMS8#PBF	LTC4301IMS8#TRPBF	LTC4301LCDD#PBF	LTC4301LCDD#TRPBF
Manufacturer	Rohm Semiconductor	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.
Type	Buffer, ReDriver	Buffer, ReDriver	Buffer, ReDriver	Buffer, ReDriver	Buffer, ReDriver	Buffer, ReDriver	Buffer, ReDriver	Buffer, ReDriver	Buffer, ReDriver	Buffer, ReDriver	Buffer, ReDriver
Number of Channels	2	2	2	2	2	2	2	2	2	2	2
Applications	I2C	I2C - Hotswap	I2C - Hotswap	I2C - Hotswap	I2C - Hotswap	I2C - Hotswap	I2C - Hotswap	I2C - Hotswap	I2C - Hotswap	I2C - Hotswap	I2C - Hotswap
Input/Output	2-Wire Bus	2-Wire Bus	2-Wire Bus	2-Wire Bus	2-Wire Bus	2-Wire Bus	2-Wire Bus	2-Wire Bus	2-Wire Bus	2-Wire Bus	2-Wire Bus
Data Rate (Max)	—	400kHz	400kHz	400kHz	400kHz	400kHz	400kHz	400kHz	400kHz	400kHz	400kHz
Voltage - Supply	4.5V ~ 12V	2.7V ~ 5.5V	2.7V ~ 5.5V	2.7V ~ 5.5V	2.7V ~ 5.5V	2.7V ~ 5.5V	2.7V ~ 5.5V	2.7V ~ 5.5V	2.7V ~ 5.5V	2.7V ~ 5.5V	2.7V ~ 5.5V
Current - Supply	40mA	4.5mA	4.5mA	4.5mA	4.5mA	4.5mA	4.5mA	4.5mA	4.5mA	4.5mA	4.5mA
Operating Temperature	-40°C ~ 85°C	0°C ~ 70°C	0°C ~ 70°C	0°C ~ 70°C	0°C ~ 70°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	0°C ~ 70°C	0°C ~ 70°C
Capacitance - Input	3000 pF	10 pF	10 pF	10 pF	10 pF	10 pF	10 pF	10 pF	10 pF	10 pF	10 pF
Package / Case	8-SOIC (0.173", 4.40mm Width)	8-WFDFN Exposed Pad	8-WFDFN Exposed Pad	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)	8-WFDFN Exposed Pad	8-WFDFN Exposed Pad	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)	8-WFDFN Exposed Pad	8-WFDFN Exposed Pad
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Not For New Designs	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

For applications requiring direct thermal compatibility with the BA8274F-E2 operating range of -40°C to 85°C, the industrial-grade LTC4301 variants (LTC4301IDD#PBF, LTC4301IDD#TRPBF, LTC4301IMS8#PBF, LTC4301IMS8#TRPBF) are the appropriate selections. These devices maintain Active product status with full ROHS3 compliance and REACH unaffected certification.

For applications operating within the commercial temperature range of 0°C to 70°C, the commercial-grade LTC4301 variants (LTC4301CDD#PBF, LTC4301CDD#TRPBF, LTC4301CMS8#PBF, LTC4301CMS8#TRPBF, LTC4301LCDD#PBF, LTC4301LCDD#TRPBF) provide equivalent functionality with reduced cost and active manufacturer support.

Package selection between 8-DFN (3x3) and 8-MSOP variants depends on PCB layout constraints and thermal management requirements. Both package types maintain equivalent electrical performance and pin compatibility for I2C bus applications.

All LTC4301 variants are available in both Tube and Tape & Reel packaging options. Tape & Reel packaging is recommended for high-volume production environments, while Tube packaging is suitable for lower-volume applications and component storage.

Frequently Asked Questions (FAQ)

Q: Can LTC4301 devices directly replace BA8274F-E2 in existing designs?

A: LTC4301 devices provide functional equivalence for I2C buffer and redriver applications with 2-channel configuration. However, package differences (8-SOIC versus 8-DFN or 8-MSOP) require PCB layout modifications. Electrical compatibility is confirmed for applications operating within the overlapping supply voltage range of 4.5V to 5.5V.

Q: What is the key difference between industrial-grade and commercial-grade LTC4301 variants?

A: Industrial-grade variants (LTC4301I series) operate across -40°C to 85°C, matching the BA8274F-E2 thermal specification. Commercial-grade variants (LTC4301C and LTC4301LC series) operate across 0°C to 70°C. Selection depends on the target application's temperature requirements.

Q: Are there package compatibility considerations when substituting the BA8274F-E2?

A: Yes. The BA8274F-E2 uses 8-SOIC packaging, while LTC4301 substitutes use either 8-DFN (3x3) or 8-MSOP packaging. These packages have different footprints and pin layouts, requiring PCB redesign. Pin-to-pin functional mapping must be verified against device datasheets before implementation.

Q: What is the significance of the supply voltage difference between BA8274F-E2 and LTC4301?

A: The BA8274F-E2 supports 4.5V to 12V operation, while LTC4301 devices support 2.7V to 5.5V. For applications using supply voltages above 5.5V, the BA8274F-E2 remains the only option among these alternatives. For applications within the 4.5V to 5.5V range, LTC4301 substitutes are electrically compatible.

Q: What packaging options are available for LTC4301 substitutes?

A: LTC4301 devices are available in two package types: 8-DFN (3x3) and 8-MSOP. Each package type is offered in both Tube and Tape & Reel configurations. The 8-DFN package provides a smaller footprint, while the 8-MSOP package offers wider pin spacing suitable for manual assembly and rework operations.

Q: Are all LTC4301 variants ROHS3 compliant?

A: Yes. All LTC4301 variants listed are ROHS3 compliant and REACH unaffected, matching the regulatory compliance status of the BA8274F-E2.

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