BA2901KN-E2 Equivalent & Substitute Parts

Part Overview

The BA2901KN-E2 is a quad general-purpose comparator IC manufactured by Rohm Semiconductor in a 16-VQFN (4x4) surface-mount package. This device features four independent open-collector comparators designed for general-purpose signal comparison applications across a wide supply voltage range of 2V to 36V (single supply) or ±1V to ±18V (dual supply).

The BA2901KN-E2 is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure component availability, and support ongoing production or maintenance of systems utilizing this comparator IC.

Substiute Parts

BA2901KN-E2

Rohm SemiconductorIn Stock: 3053BA2901KN-E2 Datasheet

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AS339GTR-G1

Diodes IncorporatedIn Stock: 53121AS339GTR-G1 Datasheet

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LMV339IDR

Texas InstrumentsIn Stock: 35220LMV339IDR Datasheet

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LMV339IPW

Texas InstrumentsIn Stock: 2147LMV339IPW Datasheet

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LMV339IPWR

Texas InstrumentsIn Stock: 17402LMV339IPWR Datasheet

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LMV339MT/NOPB

Texas InstrumentsIn Stock: 1604LMV339MT/NOPB Datasheet

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LMV339MX/NOPB

National SemiconductorIn Stock: 5247LMV339MX/NOPB Datasheet

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NJM12901D1

Nisshinbo Micro Devices Inc.In Stock: 724NJM12901D1 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the BA2901KN-E2 are identified based on the following critical parameters that determine functional equivalence:

• Comparator Count: 4 independent comparators
• Output Configuration: Open-Collector topology
• Supply Voltage Compatibility: Minimum 2V single supply or equivalent dual supply capability
• Input Offset Voltage: Maximum 7mV @ 5V or better
• Input Bias Current: Maximum 0.25µA @ 5V or better
• Output Current Capability: Minimum 10mA @ 5V
• Operating Temperature Range: Support for -40°C minimum and 85°C or higher maximum
• Package Type: Surface-mount or through-hole alternatives acceptable based on design requirements
• RoHS Compliance: ROHS3 or equivalent environmental compliance

Substitutes are grouped by package family (VQFN, TSSOP, SOIC, DIP) and product status (Active, Last Time Buy, Obsolete). Electrical parameters must fall within or exceed the BA2901KN-E2 specifications to ensure drop-in or near-drop-in compatibility.

Parameter Comparison

Engineering Selection Recommendations

For Direct Surface-Mount Replacement (Same Package Family)

The AS339GTR-G1 from Diodes Incorporated provides the closest electrical match to the BA2901KN-E2 with identical supply voltage range (2V~36V / ±1V~18V), matching output current (16mA @ 5V), and equivalent quiescent current (2mA). The AS339GTR-G1 is in active production status with high inventory availability (53,080 pcs). The primary trade-off is a reduced upper operating temperature limit (-40°C ~ 85°C versus -40°C ~ 125°C). This part is suitable for applications not requiring the extended 125°C upper temperature specification.

For Extended Temperature Range Applications

The LMV339IDR and LMV339IPW from Texas Instruments maintain the -40°C ~ 125°C operating temperature range matching the BA2901KN-E2. Both parts are ROHS3 compliant with MSL 1 rating. However, these devices operate at reduced supply voltage (2.7V~5.5V) compared to the BA2901KN-E2 (2V~36V). The LMV339IDR is in active production with 35,200 pcs inventory. The LMV339IPW is classified as Last Time Buy with limited inventory (2,100 pcs). Both exhibit higher output current capability (84mA @ 5V) and lower quiescent current (350µA), making them suitable for low-voltage applications requiring extended temperature performance.

For Through-Hole PCB Designs

The NJM12901D1 from Nisshinbo Micro Devices Inc. provides a through-hole alternative in 14-DIP package. This part is active in production (658 pcs inventory) and RoHS compliant. The supply voltage range is limited to 2V~14V, and the output current is reduced to 10mA @ 5V. This option is appropriate for legacy through-hole designs or applications with lower voltage and current requirements.

For High-Volume Production with Active Status

The LMV339IPWR and LMV339MT/NOPB from Texas Instruments are both in active production status with substantial inventory (17,300 pcs and 1,526 pcs respectively). Both are ROHS3 compliant with MSL 1 rating. These parts are recommended for new designs requiring long-term component availability and supply chain stability, with the understanding that supply voltage is limited to 2.7V~5.5V.

Frequently Asked Questions (FAQ)

Q: Can the BA2901KN-E2 be directly replaced with the AS339GTR-G1?

A: The AS339GTR-G1 is electrically compatible for most applications. Both devices feature four open-collector comparators with identical supply voltage range (2V~36V / ±1V~18V), matching output current (16mA @ 5V), and equivalent quiescent current (2mA). The primary difference is the operating temperature range: AS339GTR-G1 supports -40°C ~ 85°C versus BA2901KN-E2 at -40°C ~ 125°C. If your application does not require operation above 85°C, the AS339GTR-G1 is a suitable direct replacement. Package differences (14-TSSOP versus 16-VQFN) require PCB layout modification.

Q: What is the key difference between the BA2901KN-E2 and the LMV339 series?

A: The primary difference is supply voltage range. The BA2901KN-E2 operates from 2V to 36V (single supply) or ±1V to ±18V (dual supply), while LMV339 variants operate from 2.7V to 5.5V. The LMV339 series offers higher output current capability (84mA @ 5V versus 16mA @ 5V) and lower quiescent current (350µA versus 2mA). LMV339 parts are suitable for low-voltage, low-power applications. If your design requires the extended voltage range of the BA2901KN-E2, the LMV339 series is not compatible.

Q: Is the NJM12901D1 a suitable replacement for surface-mount designs?

A: No. The NJM12901D1 is a through-hole device in 14-DIP package, while the BA2901KN-E2 is surface-mount in 16-VQFN package. The NJM12901D1 is appropriate only for through-hole PCB designs. Additionally, the NJM12901D1 has a reduced supply voltage range (2V~14V) and lower output current (10mA @ 5V), making it unsuitable for applications requiring the full voltage range of the BA2901KN-E2.

Q: What does "Last Time Buy" status mean for the LMV339IPW?

A: Last Time Buy status indicates that the manufacturer has announced the end of production for this part number. Existing inventory may be available, but no new production runs are planned. The LMV339IPW has limited inventory (2,100 pcs). For new designs or long-term production requirements, select parts with Active status such as LMV339IPWR or LMV339MT/NOPB.

Q: Are all substitute parts RoHS3 compliant?

A: All listed substitute parts are RoHS3 compliant or RoHS compliant, matching the environmental compliance of the BA2901KN-E2. Moisture sensitivity levels vary: most Texas Instruments and Nisshinbo parts have MSL 1 (Unlimited), while the Diodes AS339GTR-G1 has MSL 3 (168 Hours), matching the BA2901KN-E2. Verify MSL requirements for your specific manufacturing and storage conditions.

Q: Can I use multiple substitute parts interchangeably in the same design?

A: No. While all listed parts are quad comparators with open-collector outputs, they have different electrical specifications and package types. Select a single substitute part based on your specific requirements for supply voltage range, operating temperature, output current, and package type. Mixing different substitute parts in the same design may result in performance inconsistencies.