LMC7221BIMX Equivalent & Substitute Parts

Part Overview

The LMC7221BIMX is a general-purpose comparator IC manufactured by Texas Instruments, housed in an 8-SOIC surface-mount package. This device features open-drain output configuration and operates across a wide supply voltage range of 2.7V to 15V (single supply) or ±1.35V to 7.5V (dual supply). The LMC7221BIMX is currently in Last Time Buy status, making identification of equivalent and substitute parts essential for design continuity and procurement planning.

Substiute Parts

LMC7221BIMX

Texas InstrumentsIn Stock: 2888LMC7221BIMX Datasheet

Current PartRFQ

LMC7221BIMX/NOPB

Texas InstrumentsIn Stock: 105561LMC7221BIMX/NOPB Datasheet

Parametric EquivalentRFQ

ADCMP391ARZ

Analog Devices Inc.In Stock: 9422ADCMP391ARZ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LMC7221BIMX are identified based on the following critical parameters that determine functional compatibility:

Primary Compatibility Criteria:

• Package type: 8-SOIC surface-mount configuration
• Functional category: General-purpose comparator
• Supply voltage range overlap with original specification
• Operating temperature range compatibility
• RoHS and regulatory compliance alignment

Substitute Classification:

Parametric Equivalent (Same Base Product, Different Packaging): LMC7221BIMX/NOPB maintains identical electrical specifications and is sourced from the same manufacturer (Texas Instruments). The primary distinction is packaging format: Cut Tape (CT) & Digi-Reel® versus Tape & Reel (TR). This substitute is functionally interchangeable at the component level.

Manufacturer-Recommended Substitute (Cross-Manufacturer Alternative): ADCMP391ARZ from Analog Devices Inc. is a general-purpose comparator in 8-SOIC package. While this device shares the same package footprint and functional category, it operates within a narrower supply voltage range (2.3V ~ 5.5V) and features rail-to-rail output rather than open-drain configuration. Substitution requires circuit-level evaluation to confirm compatibility with the application's voltage requirements and output stage design.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Recommended First Option): LMC7221BIMX/NOPB is the optimal substitute when component availability becomes constrained. This part maintains identical electrical performance and is sourced from the same manufacturer. The only distinction is packaging format (Cut Tape & Digi-Reel® versus Tape & Reel). Both variants comply with ROHS3 and carry identical regulatory certifications. This substitute requires no circuit modification and presents no compatibility risk.

For Cross-Manufacturer Substitution (Conditional): ADCMP391ARZ from Analog Devices Inc. is suitable only when the application's circuit design can accommodate the following differences: narrower supply voltage range (2.3V ~ 5.5V maximum), rail-to-rail output configuration instead of open-drain, and higher quiescent current (24.7µA versus 14µA). This device offers superior propagation delay performance (4.2µs versus 10µs) and extended operating temperature range (-40°C ~ 125°C). Both devices are ROHS3 compliant and carry Active product status, ensuring long-term availability. Substitution requires verification that the application operates within the ADCMP391ARZ supply voltage limits and that the rail-to-rail output is compatible with the existing output stage design.

Frequently Asked Questions (FAQ)

Q: Can LMC7221BIMX/NOPB be used as a direct replacement for LMC7221BIMX? A: Yes. Both parts are manufactured by Texas Instruments and share identical electrical specifications. The difference is packaging format: LMC7221BIMX/NOPB is supplied in Cut Tape & Digi-Reel® format, while LMC7221BIMX is supplied in Tape & Reel format. Electrical performance and pin configuration are identical.

Q: What are the key differences between LMC7221BIMX and ADCMP391ARZ? A: The primary differences are: (1) supply voltage range—LMC7221BIMX operates from 2.7V to 15V single supply, while ADCMP391ARZ is limited to 2.3V to 5.5V; (2) output type—LMC7221BIMX features open-drain output, ADCMP391ARZ features rail-to-rail output; (3) quiescent current—LMC7221BIMX draws 14µA maximum, ADCMP391ARZ draws 24.7µA maximum. Both are 8-SOIC surface-mount packages.

Q: Is ADCMP391ARZ suitable for applications requiring open-drain output? A: No. ADCMP391ARZ provides rail-to-rail output, not open-drain. If the application circuit specifically requires open-drain output characteristics, ADCMP391ARZ is not compatible. Use LMC7221BIMX/NOPB instead.

Q: Can ADCMP391ARZ be used in circuits operating above 5.5V supply voltage? A: No. ADCMP391ARZ maximum supply voltage is 5.5V. If the application requires operation at higher voltages (up to 15V as supported by LMC7221BIMX), ADCMP391ARZ cannot be substituted.

Q: Are all three parts RoHS compliant? A: Yes. LMC7221BIMX, LMC7221BIMX/NOPB, and ADCMP391ARZ are all ROHS3 compliant.

Q: What is the difference between Tape & Reel and Cut Tape & Digi-Reel® packaging? A: Both are surface-mount packaging formats suitable for automated assembly. Tape & Reel (TR) is continuous reel format for high-volume production. Cut Tape & Digi-Reel® (CT) is pre-cut tape format for smaller quantities or mixed-component orders. The component itself and pin configuration are identical.