MAX976ESA Equivalent & Substitute Parts

Part Overview

The MAX976ESA is a dual-channel general-purpose comparator manufactured by Analog Devices Inc./Maxim Integrated, featuring push-pull, rail-to-rail output architecture in an 8-SOIC surface-mount package. The device operates across a 2.7V to 5.5V supply range with low input offset voltage and fast propagation delay characteristics. The MAX976ESA is classified as obsolete; however, equivalent and substitute parts remain available from multiple manufacturers. Identifying suitable alternatives is necessary to maintain design continuity and ensure component availability for new production runs and legacy system support.

Key Parameters

Parameter	Value	Specification
Manufacturer Part Number	MAX976ESA	Analog Devices Inc./Maxim Integrated
Product Category	Linear Comparator	General Purpose
Number of Elements	2	Dual-channel configuration
Output Type	Push-Pull, Rail-to-Rail	Full-swing output capability
Supply Voltage Range	2.7V ~ 5.5V	Single supply operation
Input Offset Voltage (Max)	2mV @ 5V	Precision threshold detection
Input Bias Current (Max)	0.075µA @ 5.5V	High input impedance
Quiescent Current (Max)	650µA	Power consumption
CMRR / PSRR (Typ)	95dB / 100dB	Common-mode and power-supply rejection
Propagation Delay (Max)	28ns	Response time
Hysteresis	4mV	Built-in hysteresis
Operating Temperature	-40°C ~ 85°C	Industrial temperature range
Package / Case	8-SOIC (0.154", 3.90mm Width)	Surface-mount package
Product Status	Obsolete	No longer in active production
RoHS Status	ROHS3 Compliant	Environmental compliance

Substitute Part Grouping Explanation

Substitute parts for the MAX976ESA are classified into three categories based on substitution criteria:

Direct Manufacturer Equivalent (Packaging Variant)

MAX976ESA+ represents the active production variant of the MAX976ESA with identical electrical specifications and package configuration. The primary difference is packaging format (Tube vs. standard packaging) and active product status. This part is a direct pin-for-pin and functional replacement.

Parametric Equivalent (Single-Channel Variant)

MAX998ESA+ is a single-channel comparator from the same manufacturer family with identical electrical performance parameters. Substitution is valid only in applications requiring single-channel operation. All critical parameters—supply voltage, input offset, bias current, CMRR, PSRR, propagation delay, hysteresis, and operating temperature—match the MAX976ESA specification.

Cross-Manufacturer Alternatives (Functional Equivalents)

ALD2302SAL, ALD2332BSAL, TLV3492AID, and TLV3502AIDR are functionally equivalent comparators from Advanced Linear Devices Inc. and Texas Instruments. These parts share the same package footprint (8-SOIC), dual-channel configuration, push-pull output architecture, and overlapping supply voltage ranges. Substitution validity depends on tolerance of parameter variations within the allowed electrical specifications for the application.

Substitution Logic: The following parameters determine substitution eligibility:

Number of Elements: 2 (dual-channel requirement)
Output Type: Push-Pull, Rail-to-Rail (or compatible output architecture)
Package / Case: 8-SOIC (0.154", 3.90mm Width) (pin-compatible footprint)
Supply Voltage Range: Minimum overlap of 2.7V ~ 5.5V
Operating Temperature: Minimum coverage of -40°C ~ 85°C (or extended range)
Input Offset Voltage: Maximum 2mV to 6.5mV @ 5V (acceptable tolerance)
Propagation Delay: Maximum 28ns or faster (performance requirement)

Parameter Comparison

Parameter	MAX976ESA	MAX976ESA+	MAX998ESA+	ALD2302SAL	ALD2332BSAL	TLV3492AID	TLV3502AIDR
Manufacturer	Analog Devices	Analog Devices	Analog Devices	Advanced Linear Devices	Advanced Linear Devices	Texas Instruments	Texas Instruments
Number of Elements	2	2	1	2	2	2	2
Output Type	Push-Pull, Rail-to-Rail	Push-Pull, Rail-to-Rail	Push-Pull, Rail-to-Rail	CMOS, NMOS, Push-Pull, TTL	CMOS, NMOS, Push-Pull, TTL	CMOS, Push-Pull, Rail-to-Rail	CMOS, Push-Pull, Rail-to-Rail, TTL
Supply Voltage Range	2.7V ~ 5.5V	2.7V ~ 5.5V	2.7V ~ 5.5V	4V ~ 10V, ±2V ~ 5V	4V ~ 10V, ±2V ~ 5V	1.8V ~ 5.5V	2.7V ~ 5.5V, ±1.35V ~ 2.75V
Input Offset Voltage (Max)	2mV @ 5V	2mV @ 5V	2mV @ 5V	4mV @ 5V	1mV @ 5V	15mV @ 5.5V	6.5mV @ 5.5V
Input Bias Current (Max)	0.075µA @ 5.5V	0.075µA @ 5.5V	0.075µA @ 5.5V	0.001µA @ 5V	20pA @ 5V	10pA @ 5.5V	10pA @ 5.5V
Quiescent Current (Max)	650µA	650µA	650µA	500µA	500µA	1.2µA	5mA
CMRR (Typ)	95dB	95dB	95dB	—	80dB	74dB	70dB
PSRR (Typ)	100dB	100dB	100dB	—	75dB	69.12dB	100dB
Propagation Delay (Max)	28ns	28ns	28ns	—	—	14.6µs	10ns
Hysteresis	4mV	4mV	4mV	—	—	—	6mV
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	0°C ~ 70°C	0°C ~ 70°C	-40°C ~ 125°C	-40°C ~ 125°C
Package / Case	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC
Product Status	Obsolete	Active	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Tier 1: Direct Replacement (Recommended) MAX976ESA+ is the preferred substitute. It maintains identical electrical specifications, package footprint, and pin configuration as the MAX976ESA. The part is in active production status with established supply chain availability. No circuit redesign or validation is required.

Tier 2: Single-Channel Alternative MAX998ESA+ is suitable only for applications requiring single-channel comparator functionality. While all electrical parameters match the MAX976ESA, the single-element configuration limits its use to designs where only one comparator channel is needed. This part is in active production status.

Tier 3: Cross-Manufacturer Alternatives ALD2302SAL, ALD2332BSAL, TLV3492AID, and TLV3502AIDR are functionally equivalent alternatives from different manufacturers. Selection among these parts depends on specific application requirements:

ALD2332BSAL offers the lowest input offset voltage (1mV) and lowest input bias current (20pA), making it suitable for precision measurement applications. Operating temperature range is limited to 0°C ~ 70°C.
TLV3502AIDR provides the fastest propagation delay (10ns) and extended operating temperature range (-40°C ~ 125°C). It supports dual supply operation (±1.35V ~ 2.75V) in addition to single supply. High quiescent current (5mA) may impact battery-powered applications.
TLV3492AID offers the lowest quiescent current (1.2µA) and extended operating temperature range (-40°C ~ 125°C), suitable for low-power applications. Propagation delay is significantly slower (14.6µs) than the MAX976ESA.
ALD2302SAL provides moderate performance across all parameters with active product status and ROHS3 compliance. Operating temperature range is limited to 0°C ~ 70°C.

All cross-manufacturer alternatives are ROHS3 compliant and carry REACH Unaffected status, meeting environmental and regulatory requirements equivalent to the MAX976ESA.

Frequently Asked Questions (FAQ)

Q: Can MAX976ESA+ be used as a direct replacement for MAX976ESA? A: Yes. MAX976ESA+ is the active production equivalent with identical electrical specifications, pin configuration, and 8-SOIC package footprint. No circuit modifications are required.

Q: Is MAX998ESA+ a suitable substitute for MAX976ESA? A: MAX998ESA+ is suitable only in applications requiring single-channel comparator operation. All electrical parameters are identical to MAX976ESA, but the single-element configuration limits its applicability to dual-channel designs.

Q: What are the key differences between MAX976ESA and TLV3502AIDR? A: TLV3502AIDR offers faster propagation delay (10ns vs. 28ns), lower input bias current (10pA vs. 0.075µA), and extended operating temperature range (-40°C ~ 125°C vs. -40°C ~ 85°C). However, quiescent current is higher (5mA vs. 650µA), and input offset voltage is higher (6.5mV vs. 2mV). TLV3502AIDR supports dual supply operation in addition to single supply.

Q: Are all substitute parts pin-compatible with MAX976ESA? A: Yes. All substitute parts listed use the 8-SOIC (0.154", 3.90mm Width) package with identical pin configuration, ensuring mechanical and electrical compatibility on the PCB.

Q: Which substitute part is best for low-power applications? A: TLV3492AID has the lowest quiescent current (1.2µA) among the cross-manufacturer alternatives, making it suitable for battery-powered or low-power designs. However, its propagation delay (14.6µs) is significantly slower than MAX976ESA (28ns).

Q: What is the operating temperature limitation for ALD2302SAL and ALD2332BSAL? A: Both ALD parts operate within 0°C ~ 70°C, which is narrower than MAX976ESA (-40°C ~ 85°C). These parts are not suitable for applications requiring extended temperature range below 0°C or above 70°C.

Q: Can TLV3502AIDR operate on dual supply voltage? A: Yes. TLV3502AIDR supports both single supply (2.7V ~ 5.5V) and dual supply (±1.35V ~ 2.75V) operation, providing additional flexibility compared to MAX976ESA, which operates on single supply only.

Q: Which substitute offers the best precision for threshold detection? A: ALD2332BSAL provides the lowest input offset voltage (1mV @ 5V) and lowest input bias current (20pA @ 5V), making it the most precise option for threshold detection applications. However, its operating temperature range is limited to 0°C ~ 70°C.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All substitute parts listed—MAX976ESA+, MAX998ESA+, ALD2302SAL, ALD2332BSAL, TLV3492AID, and TLV3502AIDR—are ROHS3 compliant and REACH Unaffected, meeting environmental and regulatory requirements.

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