LMC6772AIM Equivalent & Substitute Parts

Part Overview

The LMC6772AIM is a dual-channel general-purpose comparator manufactured by Texas Instruments, housed in an 8-SOIC surface-mount package. This device features open-drain outputs and operates across a wide supply voltage range of 2.7V to 15V (single supply) or ±1.35V to ±7.5V (dual supply). The LMC6772AIM is currently classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. Identifying compatible alternatives ensures system functionality while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value
Manufacturer Part Number	LMC6772AIM
Manufacturer	Texas Instruments
Category	Linear
Type	General Purpose Comparator
Number of Elements	2
Output Type	Open-Drain
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)	20µA
CMRR, PSRR (Typ)	75dB CMRR, 80dB PSRR
Propagation Delay (Max)	10µs
Operating Temperature	-40°C ~ 85°C
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the LMC6772AIM are categorized based on the following substitution criteria:

Direct Equivalents (Identical Electrical and Mechanical Specifications):

Same number of comparator elements (2)
Identical output type (Open-Drain)
Matching supply voltage range (2.7V ~ 15V, ±1.35V ~ 7.5V)
Equivalent input offset voltage (5mV @ 5V)
Same input bias current (0.04pA @ 5V)
Matching output current capability (30mA typical)
Identical quiescent current (20µA maximum)
Same CMRR and PSRR specifications (75dB CMRR, 80dB PSRR)
Matching propagation delay (10µs maximum)
Compatible package footprint (8-SOIC, 0.154" width)
Operating temperature range (-40°C ~ 85°C)

Parametric Equivalents (Functional Compatibility with Minor Variations):

Single-element comparator (LMC7221AIM/NOPB) with identical electrical characteristics except element count
CMOS-type comparators (BU7233F-E2, BU7233SF-E2, BU7253F-E2) with narrower supply voltage range but compatible open-drain output and operating temperature

Parameter Comparison

Parameter	LMC6772AIM	LMC6772AIM/NOPB	LMC6772AIMX/NOPB	LMC7221AIM/NOPB	BU7233F-E2	BU7233SF-E2	BU7253F-E2
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Rohm Semiconductor	Rohm Semiconductor	Rohm Semiconductor
Number of Elements	2	2	2	1	2	2	2
Output Type	Open-Drain	Open-Drain	Open-Drain	Open-Drain	Open-Drain	CMOS, Open-Drain	Open-Drain
Voltage - Supply, Single/Dual (±)	2.7V ~ 15V, ±1.35V ~ 7.5V	2.7V ~ 15V, ±1.35V ~ 7.5V	2.7V ~ 15V, ±1.35V ~ 7.5V	2.7V ~ 15V, ±1.35V ~ 7.5V	1.8V ~ 5.5V, ±0.9V ~ 2.75V	1.8V ~ 5.5V, ±0.9V ~ 2.75V	1.8V ~ 5.5V, ±0.9V ~ 2.75V
Voltage - Input Offset (Max)	5mV @ 5V	5mV @ 5V	5mV @ 5V	5mV @ 5V	11mV @ 3V	11mV @ 3V	11.5mV
Current - Input Bias (Max)	0.04pA @ 5V	0.04pA @ 5V	0.04pA @ 5V	0.04pA @ 5V	1pA (Typ)	1pA @ 3V	1pA (Typ)
Current - Output (Typ)	30mA	30mA	30mA	30mA	6mA @ 3V	6mA @ 3V	6mA @ 3V
Current - Quiescent (Max)	20µA	20µA	20µA	14µA	25µA	25µA	65µA
CMRR, PSRR (Typ)	75dB CMRR, 80dB PSRR	75dB CMRR, 80dB PSRR	75dB CMRR, 80dB PSRR	75dB CMRR, 80dB PSRR	80dB CMRR, 80dB PSRR	80dB CMRR, 80dB PSRR	80dB CMRR, 80dB PSRR
Propagation Delay (Max)	10µs	10µs	10µs	10µs	1.8µs (Typ)	1.8µs	750ns (Typ)
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 105°C	-40°C ~ 85°C
Package / Case	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.173", 4.40mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.173", 4.40mm Width)
Product Status	Obsolete	Last Time Buy	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Texas Instruments LMC6772AIMX/NOPB (Recommended Primary Substitute)

The LMC6772AIMX/NOPB is the manufacturer-recommended direct replacement for the obsolete LMC6772AIM. This part maintains identical electrical specifications, package footprint, and operating characteristics while offering active product status. The Tape & Reel packaging format supports high-volume production requirements. This substitute requires no circuit modifications and provides full pin-for-pin compatibility.

Texas Instruments LMC6772AIM/NOPB (Secondary Substitute)

The LMC6772AIM/NOPB provides direct electrical equivalence with identical specifications. This part is classified as Last Time Buy, indicating limited availability. The Tube packaging format suits lower-volume applications. Pin-for-pin compatibility is maintained with the original LMC6772AIM.

Texas Instruments LMC7221AIM/NOPB (Single-Element Alternative)

The LMC7221AIM/NOPB is a parametric equivalent featuring a single comparator element instead of two. All electrical parameters remain identical except for quiescent current (14µA maximum versus 20µA). This substitute is suitable for applications requiring only one comparator channel, offering improved power efficiency. Active product status ensures long-term availability.

Rohm Semiconductor BU7233F-E2, BU7233SF-E2, BU7253F-E2 (CMOS Alternatives)

The Rohm CMOS comparators (BU7233F-E2, BU7233SF-E2, BU7253F-E2) provide functional substitution with the following considerations:

Supply voltage range is restricted to 1.8V ~ 5.5V (narrower than LMC6772AIM)
Input offset voltage is higher (11mV to 11.5mV versus 5mV)
Output current capability is reduced (6mA versus 30mA)
Propagation delay is significantly faster (750ns to 1.8µs typical versus 10µs maximum)
Package footprint variations exist (0.173" width for BU7233F-E2 and BU7253F-E2 versus 0.154" for original)

These substitutes are suitable only for applications operating within the 1.8V to 5.5V supply range where reduced output current and higher input offset voltage are acceptable. BU7233SF-E2 supports extended operating temperature to 105°C.

Frequently Asked Questions (FAQ)

Q: Can I use LMC6772AIMX/NOPB as a direct replacement for LMC6772AIM?

A: Yes. The LMC6772AIMX/NOPB is the manufacturer-recommended direct substitute. It maintains identical electrical specifications, package footprint (8-SOIC, 0.154" width), pin configuration, and operating characteristics. No circuit modifications are required.

Q: What is the difference between LMC6772AIM/NOPB and LMC6772AIMX/NOPB?

A: Both parts are electrically identical. The primary difference is packaging format: LMC6772AIM/NOPB uses Tube packaging, while LMC6772AIMX/NOPB uses Tape & Reel format. Product status differs—LMC6772AIM/NOPB is Last Time Buy, while LMC6772AIMX/NOPB is Active. For new designs, LMC6772AIMX/NOPB is preferred due to active status and production continuity.

Q: Can I substitute LMC7221AIM/NOPB for LMC6772AIM?

A: LMC7221AIM/NOPB is a parametric equivalent with one comparator element instead of two. All electrical parameters are identical. This substitute is suitable only if your application requires a single comparator channel. If your circuit uses both comparators in the LMC6772AIM, you would need two LMC7221AIM/NOPB devices or select a different substitute.

Q: Are Rohm CMOS comparators (BU7233F-E2, BU7233SF-E2, BU7253F-E2) compatible with LMC6772AIM?

A: These Rohm parts provide functional substitution with important limitations. The supply voltage range is restricted to 1.8V ~ 5.5V, making them incompatible with applications requiring the full 2.7V ~ 15V range of the LMC6772AIM. Input offset voltage is higher (11mV to 11.5mV versus 5mV), and output current is reduced (6mA versus 30mA). These substitutes are suitable only for low-voltage applications where these parameter differences are acceptable.

Q: What are the package footprint differences between substitute parts?

A: The LMC6772AIM uses an 8-SOIC package with 0.154" width. LMC6772AIM/NOPB and LMC6772AIMX/NOPB maintain this footprint. LMC7221AIM/NOPB also uses 8-SOIC with 0.154" width. Rohm parts BU7233F-E2 and BU7253F-E2 use 8-SOIC with 0.173" width, requiring PCB layout verification. BU7233SF-E2 uses the standard 0.154" width, matching the original footprint.

Q: Which substitute offers the best long-term availability?

A: LMC6772AIMX/NOPB is the recommended choice for long-term availability. It carries Active product status from Texas Instruments, ensuring continued production and supply. LMC7221AIM/NOPB also has Active status. The Rohm CMOS alternatives (BU7233F-E2, BU7233SF-E2, BU7253F-E2) are all Active, providing alternative sourcing options.

Q: Do all substitute parts meet RoHS3 compliance?

A: Yes. All listed substitute parts—LMC6772AIM/NOPB, LMC6772AIMX/NOPB, LMC7221AIM/NOPB, BU7233F-E2, BU7233SF-E2, and BU7253F-E2—are ROHS3 Compliant with Moisture Sensitivity Level 1 (Unlimited).

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