MAX942ESA-T Equivalent & Substitute Parts

Part Overview

The MAX942ESA-T is a dual-channel general-purpose comparator manufactured by Analog Devices Inc./Maxim Integrated in 8-SOIC surface-mount packaging. This device features CMOS, push-pull, and TTL output configurations with a supply voltage range of 2.7V to 5.5V and operates across -40°C to 85°C. The part is currently listed as obsolete with 779 units in stock. Due to its obsolete status, identifying functionally equivalent active alternatives is essential for design continuity and long-term component availability.

Key Parameters

Parameter	MAX942ESA-T
Number of Elements	2
Output Type	CMOS, Push-Pull, TTL
Voltage - Supply, Single/Dual (±)	2.7V ~ 5.5V
Voltage - Input Offset (Max)	2mV @ 5.5V
Current - Input Bias (Max)	0.15µA @ 5.5V
Current - Quiescent (Max)	600µA
CMRR, PSRR (Typ)	81.94dB CMRR, 81.94dB PSRR
Propagation Delay (Max)	80ns
Operating Temperature	-40°C ~ 85°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 eligibility for the MAX942ESA-T is determined by the following critical parameters:

Package compatibility: 8-SOIC form factor with identical 0.154" width (3.90mm)
Surface-mount technology requirement
Dual-channel (2 elements) comparator configuration
Supply voltage range overlap with 2.7V ~ 5.5V minimum requirement
Output type compatibility: CMOS, push-pull, or TTL configurations
Operating temperature range: minimum -40°C to 85°C coverage
RoHS3 compliance and MSL rating

Substitute parts are grouped into two categories:

Direct Parametric Equivalent: MAX942ESA+T maintains identical electrical specifications and output characteristics, differing only in packaging format (Cut Tape & Digi-Reel vs. standard packaging) and product status (Active vs. Obsolete).

Manufacturer-Recommended Alternatives: ADCMP392ARZ, ADCMP392ARZ-RL7, MCP6562T-E/SN, TLV3202AID, TLV3202AIDR, TS332IDT, and TS332IYDT provide functional equivalence within the 8-SOIC package while meeting or exceeding the MAX942ESA-T electrical performance envelope. These parts accommodate the supply voltage range and operating temperature requirements with variations in output type, propagation delay, and quiescent current characteristics.

Parameter Comparison

Parameter	MAX942ESA-T	MAX942ESA+T	ADCMP392ARZ	ADCMP392ARZ-RL7	MCP6562T-E/SN	TLV3202AID	TLV3202AIDR	TS332IDT	TS332IYDT
Number of Elements	2	2	2	2	2	2	2	2	2
Output Type	CMOS, Push-Pull, TTL	CMOS, Push-Pull, TTL	Rail-to-Rail	Rail-to-Rail	CMOS, Push-Pull, Rail-to-Rail, TTL	Push-Pull	Push-Pull	Open-Drain	Open-Drain
Voltage - Supply, Single/Dual (±)	2.7V ~ 5.5V	2.7V ~ 5.5V	2.3V ~ 5.5V	2.3V ~ 5.5V	1.8V ~ 5.5V	2.7V ~ 5.5V	2.7V ~ 5.5V	1.6V ~ 5V	1.6V ~ 5V
Voltage - Input Offset (Max)	2mV @ 5.5V	2mV @ 5.5V	5mV	5mV	10mV @ 5.5V	5mV @ 5V	5mV @ 5V	5mV @ 5V	5mV @ 5V
Current - Input Bias (Max)	0.15µA @ 5.5V	0.15µA @ 5.5V	0.03µA	0.03µA	1pA @ 5.5V	50pA @ 5V	50pA @ 5V	0.04µA @ 5V	0.04µA @ 5V
Current - Quiescent (Max)	600µA	600µA	29.3µA	29.3µA	130µA	50µA	50µA	26µA	26µA
CMRR, PSRR (Typ)	81.94dB CMRR, 81.94dB PSRR	81.94dB CMRR, 81.94dB PSRR	74dB CMRR, 80dB PSRR	74dB CMRR, 80dB PSRR	66dB CMRR, 70dB PSRR	70dB CMRR, 85dB PSRR	70dB CMRR, 85dB PSRR	79dB CMRR	79dB CMRR
Propagation Delay (Max)	80ns	80ns	9.7µs	9.7µs	80ns	50ns	50ns	720ns	720ns
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°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 (0.154", 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 (0.154", 3.90mm Width)
Mounting Type	Surface Mount	Surface Mount	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	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	2 (1 Year)	2 (1 Year)	1 (Unlimited)	1 (Unlimited)
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

MAX942ESA+T is the direct replacement for MAX942ESA-T. Both parts maintain identical electrical specifications and output characteristics. The primary distinction is product status: MAX942ESA+T is active with 18,011 units in stock, while MAX942ESA-T is obsolete. This part should be the first choice for direct substitution in new designs or component replenishment.

ADCMP392ARZ and ADCMP392ARZ-RL7 (Analog Devices) provide active alternatives with extended operating temperature range (-40°C to 125°C) and lower quiescent current (29.3µA vs. 600µA). These rail-to-rail output comparators are suitable for applications requiring reduced power consumption and wider temperature operation. Packaging options include tube (ADCMP392ARZ) and tape & reel (ADCMP392ARZ-RL7) formats.

MCP6562T-E/SN (Microchip Technology) offers the widest supply voltage range (1.8V to 5.5V) and lowest input bias current (1pA), making it suitable for ultra-low-power and low-voltage applications. This part maintains 80ns propagation delay matching the original specification and includes 50mA typical output current capability.

TLV3202AID and TLV3202AIDR (Texas Instruments) deliver faster propagation delay (50ns) and lower quiescent current (50µA) compared to the MAX942ESA-T. The AIDR variant includes cut-tape & digi-reel packaging with 57,800 units available. Both variants support the full 2.7V to 5.5V supply range and extended temperature operation to 125°C.

TS332IDT and TS332IYDT (STMicroelectronics) feature open-drain output configuration with the lowest quiescent current (26µA) and extended supply voltage range down to 1.6V. The IYDT variant includes automotive-grade qualification (AEC-Q100) for applications requiring automotive reliability standards. Both parts support -40°C to 125°C operation.

All substitute parts maintain ROHS3 compliance and are available in active product status with substantial inventory levels, ensuring long-term supply continuity.

Frequently Asked Questions (FAQ)

Q: Can MAX942ESA+T be used as a direct drop-in replacement for MAX942ESA-T?

A: Yes. MAX942ESA+T is electrically and mechanically identical to MAX942ESA-T. Both parts feature the same 8-SOIC package, supply voltage range (2.7V to 5.5V), output type (CMOS, push-pull, TTL), and electrical specifications. The primary difference is product status: MAX942ESA+T is active with higher inventory availability.

Q: What are the key differences between the substitute parts?

A: Substitute parts differ in output type, quiescent current, propagation delay, and operating temperature range. MAX942ESA+T and ADCMP392ARZ maintain CMOS/push-pull/TTL or rail-to-rail outputs. MCP6562T-E/SN offers the lowest input bias current (1pA) for ultra-low-power applications. TLV3202AID/AIDR provide faster propagation delay (50ns). TS332IDT/IYDT feature open-drain output with lowest quiescent current (26µA) and automotive qualification options.

Q: Are all substitute parts compatible with the 8-SOIC package footprint?

A: Yes. All listed substitute parts use the 8-SOIC package with 0.154" (3.90mm) width, ensuring PCB footprint compatibility. Surface-mount assembly processes remain unchanged.

Q: Which substitute part is best for low-power applications?

A: TS332IDT and TS332IYDT offer the lowest quiescent current at 26µA. MCP6562T-E/SN provides the lowest input bias current (1pA) for applications sensitive to input leakage. ADCMP392ARZ and ADCMP392ARZ-RL7 deliver moderate power consumption (29.3µA) with extended temperature range.

Q: Do all substitute parts support the same supply voltage range as MAX942ESA-T?

A: All substitute parts support the 2.7V to 5.5V range required by MAX942ESA-T. MCP6562T-E/SN and TS332IDT/IYDT extend the lower limit to 1.8V and 1.6V respectively, providing additional flexibility for low-voltage designs.

Q: What is the significance of the TS332IYDT automotive qualification?

A: TS332IYDT carries AEC-Q100 automotive-grade qualification, indicating compliance with automotive reliability and environmental testing standards. This variant is suitable for automotive applications requiring qualified component status.

Q: How do propagation delay differences affect circuit performance?

A: MAX942ESA-T, MAX942ESA+T, and MCP6562T-E/SN maintain 80ns propagation delay. TLV3202AID/AIDR offer faster response at 50ns. TS332IDT/IYDT have slower propagation delay at 720ns. Selection depends on timing-critical application requirements; faster propagation delay reduces circuit response time in high-speed comparator applications.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance, meeting environmental and hazardous substance restrictions for commercial and industrial applications.

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