MAX4611CSD+ Equivalent & Substitute Parts

Part Overview

The MAX4611CSD+ is a 4-circuit SPST-NC (Normally Closed) analog switch IC manufactured by Analog Devices Inc./Maxim Integrated. This component operates as a 1:1 multiplexer/demultiplexer with a maximum on-state resistance of 100Ohm and is housed in a 14-SOIC surface mount package. The device is Active in product status and widely used in signal routing, audio switching, and precision analog applications requiring low on-resistance and fast switching characteristics. Alternative parts may be required due to inventory constraints, packaging preferences, or application-specific performance requirements.

Key Parameters

Parameter	Value
Manufacturer Part Number	MAX4611CSD+
Manufacturer	Analog Devices Inc./Maxim Integrated
Category	Interface
Switch Circuit Type	SPST - NC
Number of Circuits	4
On-State Resistance (Max)	100Ohm
Voltage Supply Single (V+)	2V ~ 12V
Switch Time (Ton/Toff Max)	65ns / 28ns
-3dB Bandwidth	300MHz
Package / Case	14-SOIC (0.154", 3.90mm Width)
Operating Temperature	0°C ~ 70°C (TA)
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitution eligibility for the MAX4611CSD+ is determined by the following critical parameters:

Primary Matching Criteria:

Switch circuit topology (SPST - NC vs. SPST - NO)
Number of circuits (4 circuits required)
Package type (14-SOIC surface mount)
On-state resistance compatibility (100Ohm maximum)
Supply voltage range (2V ~ 12V minimum)
Bandwidth performance (300MHz or higher preferred)

Substitution Logic: The MAX4611CSD+ is a Normally Closed (NC) switch configuration. The onsemi MC74HC4066ADG and MC74HC4066ADR2G are Normally Open (NO) switch variants with identical circuit count, package, and supply voltage specifications. These parts are functionally equivalent for applications where the switch polarity can be accommodated in circuit design. Both substitute parts maintain the 14-SOIC package format and operate within the 2V ~ 12V supply range. The MC74HC4066 series offers lower on-state resistance (70Ohm vs. 100Ohm) and extended operating temperature range (-55°C ~ 125°C), making them suitable for broader environmental conditions.

Parameter Comparison

Parameter	MAX4611CSD+ (Main)	MC74HC4066ADG	MC74HC4066ADR2G
Manufacturer	Analog Devices Inc./Maxim Integrated	onsemi	onsemi
Switch Circuit Type	SPST - NC	SPST - NO	SPST - NO
Number of Circuits	4	4	4
On-State Resistance (Max)	100Ohm	70Ohm	70Ohm
Channel-to-Channel Matching (ΔRon)	1Ohm	15Ohm	15Ohm
Voltage Supply Single (V+)	2V ~ 12V	2V ~ 12V	2V ~ 12V
-3dB Bandwidth	300MHz	160MHz	160MHz
Current - Leakage (IS(off) Max)	100pA	100nA	100nA
Crosstalk	-80dB @ 1MHz	-80dB @ 1MHz	-80dB @ 1MHz
Operating Temperature	0°C ~ 70°C (TA)	-55°C ~ 125°C (TA)	-55°C ~ 125°C (TA)
Package / Case	14-SOIC (0.154", 3.90mm Width)	14-SOIC (0.154", 3.90mm Width)	14-SOIC (0.154", 3.90mm Width)
Packaging Format	Tube	Tube	Tape & Reel (TR)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active

Engineering Selection Recommendations

MAX4611CSD+ (Primary Part): Recommended for applications requiring Normally Closed switch operation, superior channel-to-channel matching (1Ohm), and extended bandwidth performance (300MHz). The lower leakage current (100pA) makes this part suitable for precision analog applications. Product status is Active with full ROHS3 compliance and unlimited moisture sensitivity level (MSL 1).

MC74HC4066ADG (Substitute - Tube Packaging): Suitable for applications where Normally Open switch operation is acceptable and lower on-state resistance (70Ohm) is beneficial. Extended operating temperature range (-55°C ~ 125°C) accommodates industrial and automotive environments. Available in tube packaging format. ROHS3 compliant with Active product status.

MC74HC4066ADR2G (Substitute - Tape & Reel Packaging): Functionally identical to MC74HC4066ADG with identical electrical specifications. Supplied in Tape & Reel format for high-volume manufacturing and automated assembly processes. Significantly higher inventory availability (25,290 pcs) compared to tube-packaged variant. ROHS3 compliant with Active product status.

All substitute parts maintain identical package geometry (14-SOIC), supply voltage compatibility (2V ~ 12V), and crosstalk performance (-80dB @ 1MHz). Selection between substitutes should be based on packaging requirements (Tube vs. Tape & Reel) and switch polarity compatibility with the target application circuit.

Frequently Asked Questions (FAQ)

Q: Can MC74HC4066ADG replace MAX4611CSD+ directly in my circuit?

A: Direct replacement is possible only if your circuit design accommodates Normally Open (NO) switch operation instead of Normally Closed (NC). The electrical specifications are compatible within the 14-SOIC package, but the switch polarity is inverted. Verify your application logic before substitution.

Q: What is the difference between MC74HC4066ADG and MC74HC4066ADR2G?

A: Both parts are electrically identical with matching specifications. The primary difference is packaging format: MC74HC4066ADG is supplied in Tube packaging, while MC74HC4066ADR2G is supplied in Tape & Reel (TR) format. MC74HC4066ADR2G offers significantly higher inventory availability and is preferred for high-volume production runs.

Q: Why does MC74HC4066 have lower on-state resistance (70Ohm) than MAX4611CSD+ (100Ohm)?

A: The MC74HC4066 series uses different semiconductor process technology optimized for lower on-resistance characteristics. This is a performance advantage for applications where minimal voltage drop across the switch is critical.

Q: Is the extended temperature range of MC74HC4066 (-55°C ~ 125°C) important for my application?

A: The extended temperature range is beneficial for industrial, automotive, and outdoor applications. If your application operates within 0°C ~ 70°C, the MAX4611CSD+ temperature specification is sufficient. For broader environmental conditions, MC74HC4066 variants provide additional margin.

Q: What does the channel-to-channel matching (ΔRon) parameter mean?

A: Channel-to-Channel Matching (ΔRon) specifies the maximum variation in on-state resistance between the four switch circuits on the same IC. MAX4611CSD+ offers superior matching (1Ohm) compared to MC74HC4066 variants (15Ohm), making it preferable for precision audio and instrumentation applications where channel uniformity is critical.

Q: Can I use these parts interchangeably in high-frequency applications?

A: The MAX4611CSD+ supports higher bandwidth (300MHz) compared to MC74HC4066 variants (160MHz). For applications operating above 160MHz, MAX4611CSD+ is the appropriate choice. Below 160MHz, both parts are suitable.

Q: What is the significance of the 100pA vs. 100nA leakage current difference?

A: The MAX4611CSD+ exhibits significantly lower leakage current (100pA), making it superior for precision analog applications, battery-powered devices, and low-power signal conditioning circuits. MC74HC4066 variants with 100nA leakage are acceptable for general-purpose switching applications where leakage is not a limiting factor.

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