MAX4612CSD Equivalent & Substitute Parts

Part Overview

The MAX4612CSD is a 4-circuit IC switch with SPST (Single Pole Single Throw) NO/NC configuration, manufactured by Analog Devices Inc./Maxim Integrated. This component operates as a 1:1 multiplexer/demultiplexer with 100Ohm on-state resistance and is housed in a 14-SOIC surface mount package. The part is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity.

Substiute Parts

MAX4612CSD

Analog Devices Inc./Maxim IntegratedIn Stock: 4139MAX4612CSD Datasheet

Current PartRFQ

MAX4612CSD+

Analog Devices Inc./Maxim IntegratedIn Stock: 1211MAX4612CSD+ Datasheet

DirectRFQ

MC74HC4066ADG

onsemiIn Stock: 2388MC74HC4066ADG Datasheet

MFR RecommendedRFQ

MC74HC4066ADR2G

onsemiIn Stock: 25340MC74HC4066ADR2G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MAX4612CSD is determined by the following critical parameters:

• Package Compatibility: All substitutes must use 14-SOIC surface mount packaging to ensure PCB layout compatibility
• Circuit Configuration: SPST switch topology with 4 circuits in 1:1 multiplexer/demultiplexer arrangement
• Supply Voltage Range: Operating range of 2V ~ 12V single supply
• On-State Resistance: Maximum 100Ohm specification for signal path integrity
• Crosstalk Performance: -80dB @ 1MHz minimum to maintain signal isolation

Substitutes are grouped into two categories:

Direct Manufacturer Equivalent: MAX4612CSD+ maintains identical electrical specifications and is sourced from the same manufacturer (Analog Devices Inc./Maxim Integrated), differing only in product status (Active vs. Obsolete) and packaging format (Tube vs. standard).

Cross-Manufacturer Alternative: MC74HC4066ADG and MC74HC4066ADR2G (onsemi) provide functional equivalence with modified electrical characteristics. These parts maintain the same package, circuit count, and supply voltage range but feature reduced on-state resistance (70Ohm vs. 100Ohm) and lower bandwidth (160MHz vs. 300MHz). The onsemi variants support an extended operating temperature range (-55°C ~ 125°C vs. 0°C ~ 70°C).

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement: MAX4612CSD+ is the primary substitute. It maintains identical electrical specifications and is sourced from the original manufacturer. The part is Active status, ensuring long-term availability. RoHS3 compliance provides regulatory advantage over the obsolete MAX4612CSD.

For Extended Temperature Applications: MC74HC4066ADG or MC74HC4066ADR2G are suitable when operating temperature range must extend beyond 0°C ~ 70°C. These onsemi alternatives support -55°C ~ 125°C operation. The reduced on-state resistance (70Ohm) and lower bandwidth (160MHz) are acceptable in applications where the original 100Ohm and 300MHz specifications are not critical design constraints.

For High-Volume Production: MC74HC4066ADR2G in Tape & Reel format offers the largest available inventory (25,290 pcs) and is optimized for automated assembly processes.

Compliance Considerations: All active substitutes (MAX4612CSD+, MC74HC4066ADG, MC74HC4066ADR2G) are ROHS3 compliant and REACH unaffected, meeting modern regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can MAX4612CSD+ be used as a direct drop-in replacement for MAX4612CSD?

A: Yes. MAX4612CSD+ is electrically and mechanically identical to MAX4612CSD. Both feature 100Ohm on-state resistance, 300MHz bandwidth, and 14-SOIC packaging. The primary differences are product status (Active vs. Obsolete) and packaging format (Tube vs. standard). PCB layout and circuit design require no modification.

Q: What are the key differences between MAX4612CSD and the onsemi MC74HC4066 variants?

A: The onsemi parts feature lower on-state resistance (70Ohm vs. 100Ohm), reduced bandwidth (160MHz vs. 300MHz), and extended operating temperature range (-55°C ~ 125°C vs. 0°C ~ 70°C). The MAX4612CSD offers superior channel-to-channel matching (1Ohm vs. 15Ohm). All three maintain identical package geometry, circuit count, and supply voltage range.

Q: Are the onsemi MC74HC4066ADG and MC74HC4066ADR2G electrically equivalent?

A: Yes. Both onsemi parts are electrically identical. The difference is packaging format: MC74HC4066ADG is supplied in Tube format, while MC74HC4066ADR2G is supplied in Tape & Reel (TR) format. Selection depends on assembly process requirements and volume.

Q: Does the reduced on-state resistance of onsemi parts (70Ohm vs. 100Ohm) affect compatibility?

A: Lower on-state resistance is generally beneficial, reducing signal attenuation and power dissipation. It does not create compatibility issues. However, if the original design relies on the 100Ohm specification for impedance matching or signal conditioning, circuit analysis is required before substitution.

Q: What is the impact of the 160MHz bandwidth limit in onsemi parts versus 300MHz in MAX4612CSD?

A: The bandwidth difference affects high-frequency signal handling. For applications operating below 160MHz, the onsemi parts are fully compatible. For applications requiring frequencies above 160MHz, the MAX4612CSD or MAX4612CSD+ must be used to maintain specified performance.

Q: Are all substitutes RoHS compliant?

A: MAX4612CSD is RoHS non-compliant. MAX4612CSD+, MC74HC4066ADG, and MC74HC4066ADR2G are all ROHS3 compliant, meeting current environmental and regulatory standards.

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

A: MC74HC4066ADR2G (onsemi) has the highest current inventory (25,290 pcs) and is in Active status. MAX4612CSD+ is also Active status with 1,145 pcs available. Both ensure production continuity.