MAX997ESA Equivalent & Substitute Parts

Part Overview

The MAX997ESA is a general-purpose CMOS/TTL comparator manufactured by Analog Devices Inc./Maxim Integrated, housed in an 8-SOIC package. This device is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The MAX997ESA operates across a 2.7V to 5.5V supply range with a single comparator element and TTL/CMOS output configuration. Substitute parts must maintain functional equivalence within the allowed electrical and mechanical parameters for this product category.

Key Parameters

Parameter	MAX997ESA Value	Unit
Number of Elements	1	-
Output Type	CMOS, TTL	-
Voltage - Supply, Single/Dual (±)	2.7V ~ 5.5V	V
Voltage - Input Offset (Max)	1.5mV @ 5V	mV
Current - Input Bias (Max)	15µA @ 5V	µA
Current - Quiescent (Max)	6.5mA	mA
CMRR, PSRR (Typ)	80dB CMRR, 86.02dB PSRR	dB
Propagation Delay (Max)	7ns	ns
Hysteresis	4.6mV	mV
Operating Temperature	-40°C ~ 85°C	°C
Package / Case	8-SOIC (0.154", 3.90mm Width)	-
Mounting Type	Surface Mount	-
RoHS Status	ROHS3 Compliant	-
Moisture Sensitivity Level (MSL)	1 (Unlimited)	-

Substitute Part Grouping Explanation

Substitution for the MAX997ESA is determined by the following critical parameters:

Number of Elements: Single comparator configuration
Output Type: CMOS/TTL output capability
Supply Voltage Range: Minimum 2.7V to 5.5V compatibility
Package Type: 8-SOIC surface mount form factor
Operating Temperature Range: -40°C to 85°C minimum
RoHS Compliance: ROHS3 Compliant status

Substitute parts are grouped into two categories:

Direct Packaging Equivalent: MAX997ESA+ maintains identical electrical specifications and 8-SOIC packaging with active product status and tube packaging.

Functional Equivalents with Parameter Variations: LMV762MA/NOPB, LMV762MM/NOPB, LMV762QMAX/NOPB, TC75S57F,LF, and TC75S57FU(TE85L,F) provide comparable comparator functionality within the allowed parameter ranges. These parts may differ in element count, output type, propagation delay, and package configuration while maintaining core supply voltage and temperature operating ranges.

Parameter Comparison

Parameter	MAX997ESA	MAX997ESA+	LMV762MA/NOPB	LMV762MM/NOPB	LMV762QMAX/NOPB	TC75S57F,LF	TC75S57FU(TE85L,F)
Manufacturer	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated	Texas Instruments	Texas Instruments	Texas Instruments	Toshiba Semiconductor and Storage	Toshiba Semiconductor and Storage
Product Status	Obsolete	Active	Active	Active	Active	Active	Active
Number of Elements	1	1	2	2	2	1	1
Output Type	CMOS, TTL	CMOS, TTL	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull
Voltage - Supply, Single/Dual (±)	2.7V ~ 5.5V	2.7V ~ 5.5V	2.7V ~ 5V	2.7V ~ 5V	2.7V ~ 5V	1.8V ~ 7V, ±0.9V ~ 4.6V	1.8V ~ 7V, ±0.9V ~ 4.6V
Voltage - Input Offset (Max)	1.5mV @ 5V	1.5mV @ 5V	0.2mV @ 5V	0.2mV @ 5V	0.2mV @ 5V	7mV @ 5V	7mV @ 5V
Current - Input Bias (Max)	15µA @ 5V	15µA @ 5V	50pA @ 5V	50pA @ 5V	50pA @ 5V	1pA	1pA
Current - Quiescent (Max)	6.5mA	6.5mA	700µA	700µA	700µA	220µA	220µA
CMRR, PSRR (Typ)	80dB CMRR, 86.02dB PSRR	80dB CMRR, 86.02dB PSRR	100dB CMRR, 110dB PSRR	100dB CMRR, 110dB PSRR	100dB CMRR, 110dB PSRR	-	-
Propagation Delay (Max)	7ns	7ns	225ns	225ns	225ns	140ns	140ns
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 85°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-TSSOP, 8-MSOP (0.118", 3.00mm Width)	8-SOIC (0.154", 3.90mm Width)	SC-74A, SOT-753	5-TSSOP, SC-70-5, SOT-353
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

MAX997ESA+ (Direct Equivalent)

The MAX997ESA+ is the primary substitute for the obsolete MAX997ESA. It maintains identical electrical specifications, supply voltage range, operating temperature limits, and 8-SOIC packaging. The MAX997ESA+ is active in production with tube packaging and ROHS3 compliance, making it the preferred choice for direct replacement in existing designs.

LMV762MA/NOPB, LMV762MM/NOPB, LMV762QMAX/NOPB (Texas Instruments)

These LMV762 variants are active comparators with extended operating temperature range (-40°C to 125°C) and superior input offset voltage (0.2mV vs. 1.5mV). The LMV762QMAX/NOPB includes automotive-grade qualification (AEC-Q100). These parts contain two comparator elements versus one in the MAX997ESA, and feature Push-Pull output instead of CMOS/TTL. Package options include 8-SOIC (LMV762MA/NOPB, LMV762QMAX/NOPB) and 8-VSSOP (LMV762MM/NOPB). Selection depends on package footprint requirements and whether dual-element functionality is acceptable.

TC75S57F,LF and TC75S57FU(TE85L,F) (Toshiba)

The Toshiba TC75S57 series provides single-element comparators with extended supply voltage range (1.8V to 7V or ±0.9V to ±4.6V) and ultra-low input bias current (1pA). TC75S57F,LF uses SC-74A/SOT-753 packaging, while TC75S57FU(TE85L,F) uses 5-TSSOP/SC-70-5/SOT-353 packaging. Both maintain -40°C to 85°C operating temperature matching the MAX997ESA. These parts feature higher propagation delay (140ns vs. 7ns) and higher input offset voltage (7mV vs. 1.5mV), requiring circuit-level evaluation for timing-critical applications.

Frequently Asked Questions (FAQ)

Q: Can MAX997ESA+ be used as a direct replacement for MAX997ESA?

A: Yes. The MAX997ESA+ is electrically and mechanically identical to the MAX997ESA, with the primary difference being active product status and tube packaging. It is the recommended direct substitute.

Q: What are the key differences between MAX997ESA and LMV762 variants?

A: The LMV762 series contains two comparator elements versus one in the MAX997ESA, features Push-Pull output instead of CMOS/TTL, and offers superior input offset voltage (0.2mV vs. 1.5mV). Operating temperature extends to 125°C. Package options differ: LMV762MA/NOPB and LMV762QMAX/NOPB use 8-SOIC; LMV762MM/NOPB uses 8-VSSOP. Circuit redesign may be required to utilize dual elements.

Q: Are the Toshiba TC75S57 parts suitable for high-speed applications?

A: The TC75S57 series has propagation delay of 140ns, significantly higher than the MAX997ESA (7ns). Applications requiring fast response times should evaluate timing requirements against this specification. The TC75S57 series is suitable for general-purpose comparator applications with relaxed timing constraints.

Q: What packaging considerations apply when substituting the MAX997ESA?

A: The MAX997ESA uses 8-SOIC (0.154", 3.90mm width). Direct substitutes maintaining this package are MAX997ESA+, LMV762MA/NOPB, and LMV762QMAX/NOPB. The LMV762MM/NOPB uses 8-VSSOP (0.118", 3.00mm width), requiring PCB layout modification. Toshiba TC75S57 parts use smaller packages (SC-74A or 5-TSSOP), also requiring layout changes.

Q: Do all substitute parts meet RoHS3 compliance?

A: Yes. All listed substitute parts are ROHS3 compliant with MSL rating of 1 (Unlimited), matching the MAX997ESA compliance status.

Q: Which substitute is recommended for automotive applications?

A: The LMV762QMAX/NOPB includes automotive-grade qualification (AEC-Q100) and is suitable for automotive environments. Other substitutes do not carry automotive qualification.

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