MAX516ACNG Equivalent & Substitute Parts

Part Overview

The MAX516ACNG is a 4-channel general-purpose comparator manufactured by Analog Devices Inc./Maxim Integrated in a 24-DIP through-hole package. This part is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production support. The comparator operates across a supply voltage range of 4.75V to 16.5V with CMOS and TTL output compatibility, suitable for general-purpose signal comparison applications.

Key Parameters

Parameter	MAX516ACNG
Number of Elements	4
Output Type	CMOS, TTL
Voltage - Supply, Single/Dual (±)	4.75V ~ 16.5V
Current - Input Bias (Max)	0.3µA @ 16.5V
Current - Quiescent (Max)	10mA
Propagation Delay (Max)	1.5µs
Operating Temperature	0°C ~ 70°C
Package / Case	24-DIP (0.300", 7.62mm)
Mounting Type	Through Hole
Product Status	Obsolete
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution for the MAX516ACNG is determined by the following critical parameters:

Number of Elements: Must be 4 channels
Output Type: Must support CMOS and/or TTL output
Supply Voltage Range: Must encompass or exceed 4.75V ~ 16.5V
Package Compatibility: Through-hole 24-DIP preferred; surface-mount alternatives acceptable with board redesign
Functional Classification: General-purpose comparator

Substitute parts are grouped into two categories:

Direct Package Equivalent: MAX516ACNG+ maintains identical 24-DIP packaging with improved RoHS3 compliance.

Functional Equivalents with Package Migration: LM239 and LM2901 series parts provide equivalent or superior electrical performance in surface-mount packages (14-SOIC, 14-TSSOP), requiring PCB layout changes but offering active product status and modern compliance certifications.

Parameter Comparison

Parameter	MAX516ACNG	MAX516ACNG+	LM239DT	LM239PT	LM2901D	LM2901DR2G	LM2901DTBR2G	LM2901MX	LM2901VDTBR2G
Number of Elements	4	4	4	4	4	4	4	4	4
Output Type	CMOS, TTL	CMOS, TTL	CMOS, DTL, ECL, MOS, Open-Collector, TTL	CMOS, DTL, ECL, MOS, Open-Collector, TTL	CMOS, DTL, ECL, MOS, Open-Collector, TTL	CMOS, Open-Collector, TTL	CMOS, Open-Collector, TTL	DTL, MOS, Open-Collector, TTL	CMOS, Open-Collector, TTL
Voltage - Supply, Single/Dual (±)	4.75V ~ 16.5V	4.75V ~ 16.5V	2V ~ 32V, ±1V ~ 16V	2V ~ 32V, ±1V ~ 16V	2V ~ 32V, ±1V ~ 16V	3V ~ 36V, ±1.5V ~ 18V	3V ~ 36V, ±1.5V ~ 18V	2V ~ 36V, ±1V ~ 18V	3V ~ 36V, ±1.5V ~ 18V
Current - Input Bias (Max)	0.3µA @ 16.5V	0.3µA @ 16.5V	0.25µA @ 5V	0.25µA @ 5V	0.25µA @ 5V	0.25µA @ 5V	0.25µA @ 5V	0.25µA @ 5V	0.25µA @ 5V
Current - Quiescent (Max)	10mA	10mA	2mA	2mA	2.5mA	2.5mA	2.5mA	2.5mA	2.5mA
Operating Temperature	0°C ~ 70°C	0°C ~ 70°C	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 125°C	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 85°C	-40°C ~ 125°C
Package / Case	24-DIP (0.300", 7.62mm)	24-DIP (0.300", 7.62mm)	14-SOIC (0.154", 3.90mm Width)	14-TSSOP (0.173", 4.40mm Width)	14-SOIC (0.154", 3.90mm Width)	14-SOIC (0.154", 3.90mm Width)	14-TSSOP (0.173", 4.40mm Width)	14-SOIC (0.154", 3.90mm Width)	14-TSSOP (0.173", 4.40mm Width)
Mounting Type	Through Hole	Through Hole	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Obsolete	Active	Active	Active	Active	Active	Obsolete	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Package Replacement (Through-Hole 24-DIP)

MAX516ACNG+ is the direct equivalent with identical pinout and package. It provides improved RoHS3 compliance while maintaining the same electrical specifications and through-hole mounting. This option requires no PCB redesign.

For Active Product Status with Surface-Mount Migration

LM2901VDTBR2G and LM2901D offer the widest operating temperature range (-40°C ~ 125°C) with active product status and RoHS3 compliance. These parts require PCB layout changes due to 14-TSSOP and 14-SOIC packages respectively, but provide superior long-term availability and modern manufacturing standards.

LM239DT and LM239PT (STMicroelectronics) provide active product status with high inventory availability (47,600 and 65,200 units respectively). These parts support extended supply voltage ranges (2V ~ 32V) and lower quiescent current (2mA), beneficial for battery-powered applications.

LM2901DR2G (onsemi) offers the highest inventory level (127,336 units) with active status and extended supply voltage range (3V ~ 36V, ±1.5V ~ 18V), ensuring long-term procurement stability.

Obsolete Parts to Avoid

LM2901MX remains obsolete despite RoHS3 compliance and should not be selected for new designs requiring long-term support.

Frequently Asked Questions (FAQ)

Q: Can I use a surface-mount substitute in place of the through-hole MAX516ACNG?

A: Yes, functionally equivalent surface-mount parts (LM239 and LM2901 series) can replace the MAX516ACNG, but they require PCB redesign to accommodate 14-SOIC or 14-TSSOP packages. Direct package replacement with MAX516ACNG+ avoids redesign.

Q: What is the key difference between LM239 and LM2901 series substitutes?

A: Both are 4-channel general-purpose comparators with compatible output types. LM239 series has lower quiescent current (2mA vs. 2.5mA) and narrower operating temperature range (-40°C ~ 105°C). LM2901 series offers extended temperature ranges up to 125°C on select variants. Supply voltage ranges are comparable and exceed the original MAX516ACNG specification.

Q: Why do substitute parts show lower quiescent current than the MAX516ACNG?

A: Substitute parts represent modern comparator designs with improved power efficiency. The MAX516ACNG specified 10mA quiescent current; LM239 and LM2901 series achieve 2mA to 2.5mA through advanced CMOS and process technology, reducing power consumption without compromising performance.

Q: Are all substitute parts RoHS3 compliant?

A: All recommended active substitute parts (LM239DT, LM239PT, LM2901D, LM2901DR2G, LM2901DTBR2G, LM2901VDTBR2G) are RoHS3 compliant. The original MAX516ACNG is RoHS non-compliant; MAX516ACNG+ provides compliance with identical packaging.

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

A: LM2901DR2G (onsemi) has the highest current inventory (127,336 units) with active product status, providing the strongest procurement assurance for ongoing production requirements.

Q: Can I substitute MAX516ACNG with LM2901N?

A: LM2901N (National Semiconductor) is listed as active but lacks detailed electrical specifications in the provided data. Verification of complete electrical parameters and package compatibility is required before selection.

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