MAX4526EPA Equivalent & Substitute Parts

Part Overview

The MAX4526EPA is a 2-circuit SPDT (Single Pole Double Throw) analog switch IC manufactured by Analog Devices Inc./Maxim Integrated. This component functions as a 2:1 multiplexer/demultiplexer with 175Ohm on-state resistance per channel, designed for signal routing and switching applications in analog systems. The MAX4526EPA is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity.

Key Parameters

Parameter	Value
Switch Circuit Configuration	SPDT (Single Pole Double Throw)
Number of Circuits	2
Multiplexer/Demultiplexer Circuit	2:1
On-State Resistance (Max)	175Ohm
Channel-to-Channel Matching (ΔRon)	500mOhm
Voltage Supply - Single (V+)	4.5V ~ 36V
Voltage Supply - Dual (V±)	±4.5V ~ 18V
Charge Injection	1pC
Channel Capacitance (CS(off), CD(off))	13pF
Current - Leakage (IS(off)) (Max)	500pA
Operating Temperature Range	-40°C ~ 85°C (TA)
Mounting Type	Through Hole
Package / Case	8-DIP (0.300", 7.62mm)

Substitute Part Grouping Explanation

Substitution of the MAX4526EPA is determined by strict equivalence across the following critical parameters:

Switch topology: SPDT configuration with 2 independent circuits
Multiplexer ratio: 2:1 switching capability
On-state resistance: 175Ohm maximum per channel
Channel matching: 500mOhm maximum ΔRon
Supply voltage ranges: 4.5V ~ 36V (single supply) and ±4.5V ~ 18V (dual supply)
Charge injection: 1pC
Channel capacitance: 13pF
Leakage current: 500pA maximum
Operating temperature: -40°C ~ 85°C

The MAX4526ESA+ qualifies as a direct functional equivalent, maintaining identical electrical specifications across all critical parameters. The primary difference is packaging: the MAX4526ESA+ uses surface-mount 8-SOIC technology versus the through-hole 8-DIP package of the MAX4526EPA. Both parts share the same base product number (MAX4526) and are manufactured by the same supplier.

Parameter Comparison

Parameter	MAX4526EPA (Main Part)	MAX4526ESA+ (Substitute)
Manufacturer	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated
Switch Circuit	SPDT	SPDT
Number of Circuits	2	2
Multiplexer/Demultiplexer Circuit	2:1	2:1
On-State Resistance (Max)	175Ohm	175Ohm
Channel-to-Channel Matching (ΔRon)	500mOhm	500mOhm
Voltage - Supply, Single (V+)	4.5V ~ 36V	4.5V ~ 36V
Voltage - Supply, Dual (V±)	±4.5V ~ 18V	±4.5V ~ 18V
Charge Injection	1pC	1pC
Channel Capacitance (CS(off), CD(off))	13pF	13pF
Current - Leakage (IS(off)) (Max)	500pA	500pA
Operating Temperature Range	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)
Mounting Type	Through Hole	Surface Mount
Package / Case	8-DIP (0.300", 7.62mm)	8-SOIC (0.154", 3.90mm Width)
Product Status	Obsolete	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant

Engineering Selection Recommendations

The MAX4526ESA+ is the direct substitute for the MAX4526EPA based on identical electrical performance across all specified parameters. Selection between these parts depends on design and manufacturing constraints:

Use MAX4526ESA+ when:

New designs or redesigns are being implemented
Surface-mount assembly processes are available
RoHS3 compliance is required
Active product status and ongoing manufacturer support are necessary
Smaller PCB footprint is advantageous

Use MAX4526EPA when:

Existing through-hole PCB layouts cannot be modified
Through-hole assembly equipment is the only available manufacturing method
Legacy system maintenance requires exact package compatibility
Existing inventory must be consumed

The MAX4526ESA+ is the recommended path forward due to its active product status, RoHS3 compliance, and continued manufacturer support. The MAX4526EPA, being obsolete and RoHS non-compliant, should be phased out in favor of the surface-mount equivalent.

Frequently Asked Questions (FAQ)

Q: Can the MAX4526ESA+ directly replace the MAX4526EPA in existing designs?

A: Electrically, yes. The MAX4526ESA+ maintains identical specifications for on-state resistance, supply voltage ranges, charge injection, channel capacitance, and leakage current. However, the package differs: MAX4526ESA+ is 8-SOIC (surface mount) while MAX4526EPA is 8-DIP (through hole). PCB layout and assembly process modifications are required.

Q: What is the significance of the product status difference?

A: The MAX4526EPA is classified as obsolete, meaning Analog Devices has discontinued active production and support. The MAX4526ESA+ is active, ensuring continued availability, manufacturer technical support, and compliance with current industry standards. For new designs or long-term production, the active part is the appropriate choice.

Q: Are there RoHS compliance implications?

A: Yes. The MAX4526EPA is RoHS non-compliant, while the MAX4526ESA+ is ROHS3 compliant. If your application or market requires RoHS compliance, the MAX4526ESA+ is mandatory. Both parts are REACH unaffected and classified as EAR99 for export control purposes.

Q: What are the package-related considerations for substitution?

A: The MAX4526EPA uses through-hole 8-DIP packaging (0.300" width, 7.62mm), suitable for manual assembly and breadboarding. The MAX4526ESA+ uses surface-mount 8-SOIC packaging (0.154" width, 3.90mm), requiring automated pick-and-place assembly. Pin-to-pin electrical compatibility exists, but physical board layout and assembly processes must be adapted.

Q: Are the electrical specifications truly identical?

A: Yes, across all provided parameters. Both parts feature 2 SPDT circuits with 2:1 multiplexing, 175Ohm on-state resistance, 500mOhm channel matching, identical supply voltage ranges (4.5V ~ 36V single, ±4.5V ~ 18V dual), 1pC charge injection, 13pF channel capacitance, 500pA maximum leakage, and -40°C ~ 85°C operating temperature. The base product number MAX4526 is shared by both variants.

Q: What inventory considerations exist?

A: The MAX4526EPA has 952 pieces in stock (new original), while the MAX4526ESA+ has 1139 pieces available. For immediate requirements, both options have adequate inventory. For long-term production planning, the MAX4526ESA+ is preferable due to active product status and continued manufacturing support.

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