MAX4537ESE Equivalent & Substitute Parts

Part Overview

The MAX4537ESE is a 4-circuit IC switch with SPST-NC (Single Pole Single Throw - Normally Closed) configuration manufactured by Analog Devices Inc./Maxim Integrated. This component functions as a precision analog switch with 1:1 multiplexer/demultiplexer capability and 100Ohm on-state resistance, designed for interface applications requiring low-noise signal routing.

The MAX4537ESE carries an Obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support long-term production requirements for systems utilizing this component.

Key Parameters

Parameter	Value
Switch Circuit Configuration	SPST - NC
Number of Circuits	4
On-State Resistance (Max)	100Ohm
Channel-to-Channel Matching (ΔRon)	1Ohm
Voltage Supply - Single (V+)	2V ~ 12V
Voltage Supply - Dual (V±)	±2V ~ 6V
Switch Time (Ton, Toff) Max	100ns, 50ns
Charge Injection	1pC
Channel Capacitance (CS(off), CD(off))	2pF, 2pF
Current - Leakage (IS(off)) Max	2nA
Crosstalk	-75dB @ 1MHz
Operating Temperature Range	-40°C ~ 85°C (TA)
Package / Case	16-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitution eligibility for the MAX4537ESE is determined by strict equivalence across the following critical parameters:

Switch circuit configuration (SPST - NC)
Number of circuits (4)
On-state resistance maximum (100Ohm)
Channel-to-channel matching tolerance (1Ohm)
Supply voltage ranges (2V ~ 12V single; ±2V ~ 6V dual)
Switch timing specifications (100ns, 50ns)
Charge injection (1pC)
Channel capacitance values (2pF, 2pF)
Leakage current specification (≤2nA)
Crosstalk performance (-75dB @ 1MHz)
Operating temperature range (-40°C ~ 85°C)
Package form factor (16-SOIC)

The MAX4537ESE+ meets all substitution criteria and maintains full electrical and mechanical compatibility with the original part number.

Parameter Comparison

Parameter	MAX4537ESE	MAX4537ESE+
Manufacturer	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated
Switch Circuit	SPST - NC	SPST - NC
Number of Circuits	4	4
On-State Resistance (Max)	100Ohm	100Ohm
Channel-to-Channel Matching (ΔRon)	1Ohm	1Ohm
Voltage - Supply, Single (V+)	2V ~ 12V	2V ~ 12V
Voltage - Supply, Dual (V±)	±2V ~ 6V	±2V ~ 6V
Switch Time (Ton, Toff) Max	100ns, 50ns	100ns, 50ns
Charge Injection	1pC	1pC
Channel Capacitance (CS(off), CD(off))	2pF, 2pF	2pF, 2pF
Current - Leakage (IS(off)) Max	2nA	1nA
Crosstalk	-75dB @ 1MHz	-75dB @ 1MHz
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)
Package / Case	16-SOIC (0.154", 3.90mm Width)	16-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount	Surface Mount
Product Status	Obsolete	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant
Packaging	Not specified	Tube

Engineering Selection Recommendations

The MAX4537ESE+ is the direct substitute for the MAX4537ESE. Both parts share identical electrical specifications and package form factors, ensuring pin-for-pin and functional compatibility.

The MAX4537ESE+ offers two significant advantages over the original part:

Active product status ensures ongoing availability and manufacturing support from Analog Devices Inc./Maxim Integrated.
ROHS3 compliance satisfies regulatory requirements for new designs and production environments subject to RoHS directives.

The MAX4537ESE+ exhibits superior leakage current performance (1nA maximum versus 2nA maximum), providing enhanced signal integrity in low-noise applications.

For applications where RoHS compliance is not required and existing inventory of MAX4537ESE is available, the original part remains functionally equivalent. However, for new designs and long-term production continuity, the MAX4537ESE+ is the recommended selection.

Frequently Asked Questions (FAQ)

Q: Can MAX4537ESE+ be used as a direct replacement for MAX4537ESE in existing designs?

A: Yes. The MAX4537ESE+ is electrically and mechanically identical to the MAX4537ESE. Both parts feature the same 16-SOIC package, identical pin configuration, and equivalent electrical performance across all specified parameters. No circuit modifications are required.

Q: What is the difference between MAX4537ESE and MAX4537ESE+?

A: The primary differences are product status and regulatory compliance. The MAX4537ESE is obsolete, while MAX4537ESE+ is active. The MAX4537ESE+ is ROHS3 compliant, whereas the MAX4537ESE is RoHS non-compliant. Additionally, MAX4537ESE+ demonstrates lower maximum leakage current (1nA versus 2nA).

Q: Are there any package or mounting differences between these parts?

A: No. Both parts use identical 16-SOIC surface-mount packaging with 0.154" (3.90mm) width. PCB footprints and assembly processes are identical.

Q: Which part should be selected for new designs?

A: The MAX4537ESE+ should be selected for new designs. It offers active product status, ensuring long-term availability and manufacturing support, combined with ROHS3 compliance for regulatory alignment.

Q: Is the MAX4537ESE+ suitable for applications requiring low leakage current?

A: Yes. The MAX4537ESE+ maximum leakage current specification of 1nA is superior to the MAX4537ESE specification of 2nA, making it suitable for precision analog applications where leakage current minimization is critical.

Q: What supply voltage ranges are supported by both parts?

A: Both MAX4537ESE and MAX4537ESE+ support single supply operation from 2V to 12V (V+) and dual supply operation from ±2V to ±6V (V±).

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