MAX4521EPE+ Equivalent & Substitute Parts

Part Overview

The MAX4521EPE+ is a 4-circuit IC switch manufactured by Analog Devices Inc./Maxim Integrated, classified as an Interface component. This part operates as a SPST-NC (Single Pole Single Throw - Normally Closed) switch with 1:1 multiplexer/demultiplexer configuration. The MAX4521EPE+ is currently obsolete, making identification of compatible substitute parts essential for system redesign, maintenance, and procurement planning.

Key Parameters

Parameter	MAX4521EPE+
Manufacturer	Analog Devices Inc./Maxim Integrated
Category	Interface
Circuit Type	IC Switch (SPST-NC)
Number of Circuits	4
Multiplexer Configuration	1:1
Package Type	16-DIP (0.300", 7.62mm)
Mounting Type	Through Hole
Operating Temperature	-40°C ~ 85°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute parts for the MAX4521EPE+ are qualified based on the following criteria:

Mandatory Compatibility Parameters:

Switch Circuit Type: SPST - NC
Number of Circuits: 4
Multiplexer/Demultiplexer Configuration: 1:1
Package/Case: 16-DIP (0.300", 7.62mm)
Mounting Type: Through Hole
Operating Temperature Range: -40°C ~ 85°C
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level: 1 (Unlimited)

Electrical Performance Parameters (Variable): Substitute parts differ in on-state resistance, switch timing characteristics, charge injection, and leakage current. These variations allow selection based on specific application requirements while maintaining functional compatibility.

The following parts meet all mandatory compatibility criteria:

ADG411BNZ - 35Ohm on-state resistance, 175ns/145ns switch time
ADG431BNZ - 24Ohm on-state resistance, 90ns/60ns switch time
ADG441BNZ - 70Ohm on-state resistance, 110ns/60ns switch time
DG271BCJ-E3 - 50Ohm on-state resistance, 65ns/65ns switch time

Parameter Comparison

Parameter	MAX4521EPE+	ADG411BNZ	ADG431BNZ	ADG441BNZ	DG271BCJ-E3
Manufacturer	Analog Devices Inc./Maxim	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Vishay Siliconix
Product Status	Obsolete	Active	Active	Active	Active
Switch Circuit	SPST - NC	SPST - NC	SPST - NC	SPST - NC	SPST - NC
Number of Circuits	4	4	4	4	4
Multiplexer Configuration	1:1	1:1	1:1	1:1	1:1
On-State Resistance (Max)	Not specified	35Ohm	24Ohm	70Ohm	50Ohm
Voltage - Supply, Dual (V±)	Not specified	±15V	±15V	±15V	±15V
Switch Time Ton (Max)	Not specified	175ns	90ns	110ns	65ns
Switch Time Toff (Max)	Not specified	145ns	60ns	60ns	65ns
Charge Injection	Not specified	5pC	5pC	1pC	-5pC
Current - Leakage (IS(off)) (Max)	Not specified	250pA	250pA	500pA	1nA
Crosstalk	Not specified	-85dB @ 1MHz	-85dB @ 1MHz	-100dB @ 1MHz	-100dB @ 100kHz
Package / Case	16-DIP (0.300", 7.62mm)	16-DIP (0.300", 7.62mm)	16-DIP (0.300", 7.62mm)	16-DIP (0.300", 7.62mm)	16-DIP (0.300", 7.62mm)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

All four substitute parts are active products with ROHS3 compliance and MSL 1 rating, providing long-term availability and regulatory compliance advantages over the obsolete MAX4521EPE+.

ADG431BNZ offers the lowest on-state resistance (24Ohm) and fastest switch times (90ns/60ns), making it suitable for applications requiring minimal signal attenuation and rapid switching response.

ADG441BNZ provides the highest crosstalk isolation (-100dB @ 1MHz) and lowest charge injection (1pC), beneficial for precision analog switching applications where signal integrity is critical.

DG271BCJ-E3 (Vishay Siliconix) delivers symmetric switch timing (65ns/65ns) and the lowest leakage current (1nA), offering an alternative from a different manufacturer with comparable performance characteristics.

ADG411BNZ represents a mid-range option with balanced electrical characteristics across on-state resistance, switch timing, and crosstalk performance.

Frequently Asked Questions (FAQ)

Q: Can I directly replace MAX4521EPE+ with any of these substitute parts?

A: Yes. All listed substitute parts share identical package type (16-DIP), mounting configuration (Through Hole), circuit topology (SPST-NC, 4-circuit, 1:1), and operating temperature range (-40°C ~ 85°C). Pin-for-pin compatibility is maintained across all substitutes.

Q: What is the primary difference between the substitute options?

A: The substitute parts differ in on-state resistance values (24Ohm to 70Ohm), switch timing characteristics (60ns to 175ns), and leakage current specifications (250pA to 1nA). Selection depends on application-specific requirements for signal loss, switching speed, and precision.

Q: Are all substitutes RoHS compliant?

A: Yes. All substitute parts carry ROHS3 compliance certification and MSL 1 rating, meeting current regulatory requirements and providing unlimited shelf life.

Q: Which substitute offers the best performance for high-speed switching applications?

A: ADG431BNZ provides the fastest switching times (90ns Ton, 60ns Toff) among the substitutes, making it optimal for applications requiring rapid signal switching.

Q: Which substitute is recommended for precision analog signal switching?

A: ADG441BNZ offers superior crosstalk isolation (-100dB @ 1MHz) and minimal charge injection (1pC), making it suitable for precision analog applications where signal fidelity is paramount.

Q: Is the DG271BCJ-E3 from a different manufacturer compatible?

A: Yes. The DG271BCJ-E3 from Vishay Siliconix meets all mandatory compatibility parameters and maintains functional equivalence. It provides an alternative sourcing option with symmetric timing characteristics (65ns/65ns).

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