MAX4668ESE+ Equivalent & Substitute Parts

Part Overview

The MAX4668ESE+ is a 2-circuit IC switch manufactured by Analog Devices Inc./Maxim Integrated, configured as a SPST-NO (Single Pole Single Throw - Normally Open) device with 1:1 multiplexer/demultiplexer functionality. This component operates across a wide supply voltage range (4.5V to 36V single supply, or ±4.5V to ±20V dual supply) and features low on-state resistance of 2.5Ohm maximum. The device is currently in active production status with 812 units in stock. Alternative part identification becomes necessary when addressing supply chain constraints, regional availability requirements, or specific procurement specifications while maintaining identical electrical and mechanical performance.

Key Parameters

Parameter	Specification
Manufacturer Part Number	MAX4668ESE+
Manufacturer	Analog Devices Inc./Maxim Integrated
Switch Circuit Type	SPST - NO
Number of Circuits	2
On-State Resistance (Max)	2.5Ohm
Channel-to-Channel Matching (ΔRon)	50mOhm
Voltage - Supply, Single (V+)	4.5V ~ 36V
Voltage - Supply, Dual (V±)	±4.5V ~ 20V
Switch Time (Ton, Toff) (Max)	275ns, 175ns
Charge Injection	450pC
Channel Capacitance (CS(off), CD(off))	65pF, 65pF
Current - Leakage (IS(off)) (Max)	500pA
Crosstalk	-66dB @ 1MHz
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	16-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected
Product Status	Active

Substitute Part Grouping Explanation

Substitution of the MAX4668ESE+ is determined by strict equivalence across the following critical parameters:

Switch Configuration: SPST-NO topology with 1:1 multiplexer/demultiplexer circuit
Circuit Count: Exactly 2 circuits
On-State Resistance: Maximum 2.5Ohm with channel-to-channel matching of 50mOhm
Supply Voltage Range: 4.5V to 36V (single supply) or ±4.5V to ±20V (dual supply)
Switching Performance: Maximum switch times of 275ns (Ton) and 175ns (Toff)
Signal Integrity: Charge injection of 450pC, channel capacitance of 65pF (both CS(off) and CD(off)), crosstalk of -66dB @ 1MHz
Leakage Current: Maximum 500pA (IS(off))
Package: 16-SOIC surface mount with 0.154" (3.90mm) width
Environmental Compliance: ROHS3 compliant, MSL 1, REACH unaffected
Operating Range: -40°C to 85°C

Only components meeting all specified parameters across electrical performance, package dimensions, and regulatory compliance qualify as direct substitutes.

Parameter Comparison

Parameter	MAX4668ESE+ (Main Part)	MAX4668ESE+ (Direct Substitute)
Manufacturer Part Number	MAX4668ESE+	MAX4668ESE+
Manufacturer	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated
Switch Circuit Type	SPST - NO	SPST - NO
Number of Circuits	2	2
On-State Resistance (Max)	2.5Ohm	2.5Ohm
Channel-to-Channel Matching (ΔRon)	50mOhm	50mOhm
Voltage - Supply, Single (V+)	4.5V ~ 36V	4.5V ~ 36V
Voltage - Supply, Dual (V±)	±4.5V ~ 20V	±4.5V ~ 20V
Switch Time (Ton, Toff) (Max)	275ns, 175ns	275ns, 175ns
Charge Injection	450pC	450pC
Channel Capacitance (CS(off), CD(off))	65pF, 65pF	65pF, 65pF
Current - Leakage (IS(off)) (Max)	500pA	500pA
Crosstalk	-66dB @ 1MHz	-66dB @ 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
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected
Product Status	Active	Active

Engineering Selection Recommendations

The MAX4668ESE+ maintains active production status with confirmed inventory availability. Selection of this component or its direct equivalent is supported by ROHS3 compliance and REACH unaffected status, meeting current environmental and regulatory requirements. The MSL 1 rating indicates unlimited moisture sensitivity protection, suitable for standard storage and handling conditions. Active product status ensures continued manufacturer support and supply chain stability for production and long-term field deployment applications.

Frequently Asked Questions (FAQ)

Q: What defines a valid substitute for the MAX4668ESE+? A: A valid substitute must match all electrical parameters including SPST-NO switch configuration, 2-circuit topology, 2.5Ohm on-state resistance, 4.5V to 36V supply range, switching times, and signal integrity specifications. The package must be 16-SOIC surface mount with identical dimensions, and regulatory compliance (ROHS3, REACH) must be maintained.

Q: Can the MAX4668ESE+ be replaced with a different switch topology? A: No. The SPST-NO configuration with 1:1 multiplexer/demultiplexer function is specific to this device. Alternative topologies (SPDT, DPST, or different multiplexer ratios) are not substitutes and require circuit redesign.

Q: Are there packaging alternatives for the MAX4668ESE+? A: The 16-SOIC package is the specified form factor. Alternative packages require different part numbers and are not direct substitutes. Package selection is determined by PCB layout and assembly process requirements.

Q: What is the significance of the 50mOhm channel-to-channel matching specification? A: This parameter ensures consistent on-state resistance between the two circuits, critical for applications requiring balanced signal paths or matched switching characteristics. Substitutes must maintain this specification.

Q: Does the MSL 1 rating affect component handling? A: MSL 1 indicates unlimited moisture sensitivity, meaning the component does not require special moisture control during storage or handling. Standard warehouse conditions are acceptable.

Q: Is the MAX4668ESE+ suitable for high-frequency applications? A: The -66dB crosstalk specification @ 1MHz and 450pC charge injection support operation in RF and high-frequency signal switching applications within the specified bandwidth limitations.

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