LMC7221AIM5X Equivalent & Substitute Parts

Part Overview

The LMC7221AIM5X is a general-purpose comparator IC manufactured by Texas Instruments, housed in a SOT-23-5 surface mount package. This single-element open-drain comparator operates across a supply voltage range of 2.7V to 15V (single supply) or ±1.35V to ±7.5V (dual supply), with a maximum input offset voltage of 5mV at 5V and typical output current of 30mA.

The LMC7221AIM5X is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure component availability, and support long-term production requirements. Substitute parts must maintain electrical compatibility across key parameters including supply voltage range, input offset voltage, output type, and operating temperature range.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Part Number	LMC7221AIM5X
Category	Linear - Comparator
Type	General Purpose
Number of Elements	1
Output Type	Open-Drain
Package / Case	SC-74A, SOT-753 (SOT-23-5)
Mounting Type	Surface Mount
Voltage - Supply, Single/Dual (±)	2.7V ~ 15V, ±1.35V ~ 7.5V
Voltage - Input Offset (Max)	5mV @ 5V
Current - Input Bias (Max)	0.04pA @ 5V
Current - Output (Typ)	30mA
Current - Quiescent (Max)	14µA
CMRR, PSRR (Typ)	75dB CMRR, 80dB PSRR
Propagation Delay (Max)	10µs
Operating Temperature	-40°C ~ 85°C
Product Status	Obsolete
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the LMC7221AIM5X are classified based on electrical and mechanical compatibility. The primary substitution criteria are:

Electrical Compatibility Parameters:

Output type: Open-Drain (required match)
Supply voltage range: Must encompass or match 2.7V ~ 15V single supply
Input offset voltage: Maximum 5mV @ 5V or lower
Operating temperature range: -40°C ~ 85°C (required match)
Number of elements: Single comparator (required match)

Mechanical Compatibility Parameters:

Package type: SOT-23-5 (SC-74A, SOT-753) for pin-compatible substitutes
Mounting type: Surface Mount (required match)

Substitution Categories:

Direct Manufacturer Equivalents (Texas Instruments): Parts with identical electrical specifications but different packaging or product status.
Parametric Equivalents (Texas Instruments): Parts with matching electrical performance and SOT-23-5 packaging, differing only in product status or packaging format.
Manufacturer-Recommended Alternatives: Parts from other manufacturers (Microchip Technology, STMicroelectronics) with comparable electrical characteristics and SOT-23-5 packaging, though with minor parameter variations within acceptable engineering tolerances.

Parameter Comparison

Parameter	LMC7221AIM5X	LMC7221AIMX/NOPB	LMC7221AIM5	LMC7221AIM5/NOPB	LMC7221AIM5X/NOPB	MIC7221YM5-TR	TS7221AILT	TS7221BILT
Manufacturer	TI	TI	TI	TI	TI	Microchip	STMicro	STMicro
Package	SOT-23-5	8-SOIC	SOT-23-5	SOT-23-5	SOT-23-5	SOT-23-5	SOT-23-5	SOT-23-5
Output Type	Open-Drain	Open-Drain	Open-Drain	Open-Drain	Open-Drain	Open-Drain	Open-Drain	Open-Drain
Supply Voltage (Single)	2.7V ~ 15V	2.7V ~ 15V	2.7V ~ 15V	2.7V ~ 15V	2.7V ~ 15V	2.2V ~ 10V	2.7V ~ 10V	2.7V ~ 10V
Input Offset (Max) @ 5V	5mV	5mV	5mV	5mV	5mV	10mV	7mV	15mV
Input Bias (Max) @ 5V	0.04pA	0.04pA	0.04pA	0.04pA	0.04pA	0.5pA	300pA	300pA
Output Current (Typ)	30mA	30mA	30mA	30mA	30mA	—	30mA	30mA
Quiescent Current (Max)	14µA	14µA	14µA	14µA	14µA	25µA	16µA	16µA
CMRR (Typ)	75dB	75dB	75dB	75dB	75dB	70dB	70dB	70dB
PSRR (Typ)	80dB	80dB	80dB	80dB	80dB	90dB	80dB	80dB
Propagation Delay (Max)	10µs	10µs	10µs	10µs	10µs	5µs	—	—
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Product Status	Obsolete	Active	Obsolete	Last Time Buy	Active	Active	Active	Active
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For Pin-Compatible, Electrically Identical Substitution (SOT-23-5 Package):

LMC7221AIM5X/NOPB is the primary active substitute. This part maintains identical electrical specifications and SOT-23-5 packaging while offering Active product status and ROHS3 compliance. It is suitable for direct replacement in new designs and production continuity.

LMC7221AIM5 and LMC7221AIM5/NOPB are parametric equivalents with matching electrical performance and SOT-23-5 packaging. LMC7221AIM5/NOPB carries Last Time Buy status, indicating limited future availability. Both are ROHS3 compliant.

For Different Package Format (8-SOIC):

LMC7221AIMX/NOPB provides identical electrical specifications in an 8-SOIC package. This option requires PCB layout modification and is suitable only when SOT-23-5 packaging is not feasible. Active product status and ROHS3 compliance are confirmed.

For Cross-Manufacturer Substitution (SOT-23-5 Package):

MIC7221YM5-TR (Microchip Technology) operates within a narrower supply voltage range (2.2V ~ 10V) and exhibits higher input offset voltage (10mV maximum) and input bias current (0.5pA). Faster propagation delay (5µs) is available. ROHS3 compliant and Active status. Suitable for applications within the 2.2V ~ 10V supply range where the specified input offset and bias parameters are acceptable.

TS7221AILT (STMicroelectronics) operates within 2.7V ~ 10V supply range with 7mV maximum input offset voltage and 300pA input bias current. ROHS3 compliant and Active status. Suitable for applications within the 2.7V ~ 10V supply range where higher input bias current is acceptable.

TS7221BILT (STMicroelectronics) operates within 2.7V ~ 10V supply range with 15mV maximum input offset voltage and 300pA input bias current. Highest inventory availability (596,100 pcs). ROHS3 compliant and Active status. Suitable for cost-sensitive applications and high-volume production where the relaxed input offset specification is acceptable.

Frequently Asked Questions (FAQ)

Q: Can LMC7221AIM5X be directly replaced with LMC7221AIM5X/NOPB?

A: Yes. LMC7221AIM5X/NOPB is electrically and mechanically identical, with identical SOT-23-5 packaging. The primary difference is product status (Active vs. Obsolete) and RoHS compliance (ROHS3 vs. non-compliant). Direct PCB substitution is possible without design modification.

Q: What is the difference between LMC7221AIM5X and LMC7221AIMX/NOPB?

A: Both are Texas Instruments parts with identical electrical specifications. The primary difference is packaging: LMC7221AIM5X uses SOT-23-5, while LMC7221AIMX/NOPB uses 8-SOIC. PCB layout modification is required for the 8-SOIC variant. LMC7221AIMX/NOPB is Active and ROHS3 compliant.

Q: Can I use TS7221BILT as a substitute for LMC7221AIM5X?

A: TS7221BILT is mechanically compatible (SOT-23-5 package) and electrically compatible within the 2.7V ~ 10V supply range. However, the maximum input offset voltage is 15mV compared to 5mV for the LMC7221AIM5X, and input bias current is 300pA versus 0.04pA. Substitution is acceptable only if the application tolerates these relaxed specifications. TS7221BILT is Active and ROHS3 compliant with high inventory availability.

Q: What are the supply voltage limitations for cross-manufacturer substitutes?

A: MIC7221YM5-TR operates from 2.2V ~ 10V (narrower than LMC7221AIM5X at 2.7V ~ 15V). TS7221AILT and TS7221BILT operate from 2.7V ~ 10V. Applications requiring supply voltages above 10V must use Texas Instruments parts (LMC7221 series) to maintain full specification compliance.

Q: Are all substitute parts RoHS compliant?

A: LMC7221AIM5X is RoHS non-compliant. All substitute parts listed (LMC7221AIM5X/NOPB, LMC7221AIM5, LMC7221AIM5/NOPB, MIC7221YM5-TR, TS7221AILT, TS7221BILT) are ROHS3 compliant, meeting current environmental regulations.

Q: Which substitute offers the best availability?

A: TS7221BILT (STMicroelectronics) has the highest inventory at 596,100 pcs. This part is suitable for high-volume production and cost-sensitive applications where the relaxed input offset voltage specification (15mV maximum) is acceptable.

Q: Can I use MIC7221YM5-TR in a 15V supply application?

A: No. MIC7221YM5-TR is rated for maximum 10V supply voltage. Applications requiring 15V supply must use Texas Instruments LMC7221 series parts. Using MIC7221YM5-TR outside its specified supply range violates component ratings and may cause device failure.

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