LMC7225IM Equivalent & Substitute Parts

Part Overview

The LMC7225IM is a general-purpose comparator IC manufactured by Texas Instruments, featuring open-drain output configuration in an 8-SOIC package. This device is classified as obsolete, which necessitates identification of active equivalent and substitute parts for new designs and production continuity. The LMC7225IM operates across a supply voltage range of 2V to 8V (single supply) or ±1V to ±4V (dual supply), with typical output current of 30mA and maximum quiescent current of 1µA.

Substiute Parts

LMC7225IM

Texas InstrumentsIn Stock: 1225LMC7225IM Datasheet

Current PartRFQ

LMC7215IMX/NOPB

Texas InstrumentsIn Stock: 3308LMC7215IMX/NOPB Datasheet

MFR RecommendedRFQ

LMC7225IM5/NOPB

Texas InstrumentsIn Stock: 2201LMC7225IM5/NOPB Datasheet

MFR RecommendedRFQ

BU7230SG-TR

Rohm SemiconductorIn Stock: 922BU7230SG-TR Datasheet

MFR RecommendedRFQ

LMV331ILT

STMicroelectronicsIn Stock: 6585LMV331ILT Datasheet

MFR RecommendedRFQ

LMV331SN3T1G

onsemiIn Stock: 40196LMV331SN3T1G Datasheet

MFR RecommendedRFQ

MAX40002ANS02+T

Analog Devices Inc./Maxim IntegratedIn Stock: 878MAX40002ANS02+T Datasheet

MFR RecommendedRFQ

MAX40002ANS12+T

Analog Devices Inc./Maxim IntegratedIn Stock: 3484MAX40002ANS12+T Datasheet

MFR RecommendedRFQ

MAX40003ANS02+T

Analog Devices Inc./Maxim IntegratedIn Stock: 8648MAX40003ANS02+T Datasheet

MFR RecommendedRFQ

NCV331SN3T1G

onsemiIn Stock: 65369NCV331SN3T1G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LMC7225IM is determined by the following critical parameters:

Primary Compatibility Criteria:

• Output type: Open-Drain (required for direct functional replacement)
• Supply voltage range: Must encompass or overlap with 2V ~ 8V single supply or ±1V ~ 4V dual supply
• Package compatibility: Physical footprint and pin count
• Number of elements: Single comparator
• Operating temperature range: Minimum -40°C to 85°C

Substitution Groups:

Group 1: Direct Package Equivalents (8-SOIC)

• LMC7225IM5/NOPB: Same base part, different package (SOT-23-5), active status, RoHS3 compliant

Group 2: Functional Equivalents with Different Packages (SOT-23-5 / 5-SSOP / 5-TSOP)

• BU7230SG-TR (Rohm): CMOS comparator, open-drain, 5-SSOP package, active status
• LMV331ILT (STMicroelectronics): General-purpose comparator, open-drain, SOT-23-5 package, active status
• LMV331SN3T1G (onsemi): General-purpose comparator, open-drain, 5-TSOP package, active status
• NCV331SN3T1G (onsemi): General-purpose comparator, open-drain, 5-TSOP package, automotive grade, active status

Group 3: Functional Equivalents with Integrated Voltage Reference (4-WLP)

• MAX40002ANS02+T (Analog Devices/Maxim): Comparator with voltage reference, open-drain, 4-WLP package, active status
• MAX40002ANS12+T (Analog Devices/Maxim): Comparator with voltage reference, open-drain, 4-WLP package, active status
• MAX40003ANS02+T (Analog Devices/Maxim): Comparator with voltage reference, open-drain, 4-WLP package, active status

Group 4: Push-Pull Output Alternative

• LMC7215IMX/NOPB (Texas Instruments): General-purpose comparator, push-pull output, 8-SOIC package, active status

Parameter Comparison

Engineering Selection Recommendations

For Direct 8-SOIC Package Replacement: LMC7215IMX/NOPB is the primary recommendation. It maintains the same 8-SOIC footprint and Texas Instruments manufacturing lineage. The key difference is push-pull output versus open-drain; this requires circuit-level evaluation. The part is active and RoHS3 compliant, addressing obsolescence and regulatory compliance concerns.

For Compact Package Designs (SOT-23-5): LMC7225IM5/NOPB is the direct equivalent from Texas Instruments in a smaller footprint. It retains identical electrical specifications and open-drain output. This part is active and RoHS3 compliant, making it suitable for new designs requiring the same functional performance in reduced board space.

For Automotive-Grade Applications: NCV331SN3T1G (onsemi) provides AEC-Q100 qualification and automotive-grade certification. It offers open-drain output in 5-TSOP package with faster propagation delay (800ns) and lower quiescent current (120µA). This part is active and RoHS3 compliant.

For General-Purpose Industrial Applications: LMV331ILT (STMicroelectronics) or LMV331SN3T1G (onsemi) are suitable alternatives. Both provide open-drain output in compact packages with active product status and RoHS3 compliance. LMV331ILT offers higher output current capability (93mA @ 5V), while LMV331SN3T1G provides faster response (1.5µs propagation delay).

For Space-Constrained Applications with Integrated Reference: MAX40002ANS02+T, MAX40002ANS12+T, or MAX40003ANS02+T (Analog Devices/Maxim) integrate voltage reference functionality in 4-WLP ultra-compact packages. These parts are active and RoHS3 compliant but require evaluation of integrated reference specifications against circuit requirements.

For CMOS Technology Preference: BU7230SG-TR (Rohm Semiconductor) provides CMOS comparator architecture in 5-SSOP package with significantly faster propagation delay (1.8µs typical). Supply voltage range is narrower (1.8V ~ 5.5V), requiring verification against application requirements. The part is active and RoHS3 compliant.

Frequently Asked Questions (FAQ)

Q: Can LMC7225IM be directly replaced with LMC7215IMX/NOPB? A: Both parts share the same 8-SOIC package and electrical specifications. The primary difference is output type: LMC7225IM uses open-drain output, while LMC7215IMX/NOPB uses push-pull output. Direct substitution requires circuit-level analysis to confirm output stage compatibility. LMC7215IMX/NOPB is active and RoHS3 compliant.

Q: What is the difference between open-drain and push-pull output? A: Open-drain output requires an external pull-up resistor to establish high logic level. Push-pull output actively drives both high and low logic levels without external components. Circuit design must accommodate the selected output type.

Q: Are all substitute parts RoHS3 compliant? A: All recommended substitute parts listed are RoHS3 compliant. The original LMC7225IM is RoHS non-compliant. Compliance verification is essential for regulated applications.

Q: Which substitute part offers the fastest response time? A: LMV331ILT provides the fastest propagation delay at 550ns. BU7230SG-TR offers 1.8µs typical propagation delay. NCV331SN3T1G provides 800ns propagation delay. Selection depends on application timing requirements.

Q: Can I use MAX40002 or MAX40003 series as direct replacements? A: MAX40002 and MAX40003 series integrate voltage reference functionality and use 4-WLP ultra-compact packages. These are functional equivalents with open-drain output but require PCB redesign due to package incompatibility. Integrated reference specifications must be evaluated against circuit requirements.

Q: What is the supply voltage compatibility range for substitutes? A: The original LMC7225IM operates at 2V ~ 8V (single supply) or ±1V ~ 4V (dual supply). Substitute parts have varying ranges: LMV331 series operates at 2.7V ~ 5V, BU7230SG-TR at 1.8V ~ 5.5V, and MAX40002/MAX40003 at 1.7V ~ 5.5V. Application supply voltage must fall within the selected substitute's operating range.

Q: Is NCV331SN3T1G suitable for automotive applications? A: Yes. NCV331SN3T1G carries AEC-Q100 automotive qualification and is designated as automotive-grade. It is suitable for automotive and harsh-environment applications requiring reliability certification.

Q: What package options are available for LMC7225 base part? A: The LMC7225 base part is available in 8-SOIC (LMC7225IM) and SOT-23-5 (LMC7225IM5/NOPB) packages. Both are active and RoHS3 compliant.

Q: How do quiescent current specifications compare? A: The original LMC7225IM specifies 1µA maximum quiescent current. Substitutes vary: LMV331 series at 150µA, NCV331SN3T1G at 120µA, BU7230SG-TR at 15µA, and MAX40002/MAX40003 at 1.1µA. Lower quiescent current is beneficial for battery-powered applications.