MAX333CAP+ Equivalent & Substitute Parts

Part Overview

The MAX333CAP+ is a 4-circuit SPDT (Single Pole Double Throw) analog switch IC manufactured by Analog Devices Inc./Maxim Integrated. This component functions as a 2:1 multiplexer/demultiplexer with an on-state resistance of 250Ohm, designed for signal routing and switching applications in analog circuits. The device operates with single supply voltage (10V ~ 30V) or dual supply voltage (±5V ~ 18V) configurations.

The MAX333CAP+ is classified as obsolete. Finding equivalent or substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and access improved performance characteristics available in active product alternatives.

Key Parameters

Parameter	Value
Switch Circuit Type	SPDT
Multiplexer/Demultiplexer Configuration	2:1
Number of Circuits	4
On-State Resistance (Max)	250Ohm
Voltage Supply - Single (V+)	10V ~ 30V
Voltage Supply - Dual (V±)	±5V ~ 18V
Switch Time (Ton, Toff)	1µs, 500ns
Channel Capacitance (CS(off), CD(off))	5pF
Current - Leakage (IS(off)) (Max)	5nA
Crosstalk	-78dB @ 1MHz
Operating Temperature	0°C ~ 70°C (TA)
Mounting Type	Surface Mount
Package / Case	20-SSOP (0.209", 5.30mm Width)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the MAX333CAP+ is determined by the following critical parameters:

Functional Equivalence: Switch circuit type (SPDT), multiplexer configuration (2:1), and number of circuits (4) must remain identical
Electrical Compatibility: Supply voltage ranges must support the application requirements; on-state resistance must be acceptable for the signal path
Package Compatibility: Physical package type (20-SSOP) and pin configuration must match to ensure PCB-level compatibility
Compliance Requirements: RoHS3 compliance and MSL rating must be maintained for manufacturing and environmental standards

The MAX333ACAP+ qualifies as a direct substitute based on these criteria. Both parts share identical functional architecture (4-circuit SPDT 2:1 switch), compatible supply voltage ranges, identical package specifications, and equivalent compliance certifications.

Parameter Comparison

Parameter	MAX333CAP+ (Main Part)	MAX333ACAP+ (Substitute)
Product Status	Obsolete	Active
Switch Circuit Type	SPDT	SPDT
Multiplexer/Demultiplexer Configuration	2:1	2:1
Number of Circuits	4	4
On-State Resistance (Max)	250Ohm	45Ohm
Channel-to-Channel Matching (ΔRon)	Not specified	2Ohm (Max)
Voltage Supply - Single (V+)	10V ~ 30V	10V ~ 30V
Voltage Supply - Dual (V±)	±5V ~ 18V	±4.5V ~ 20V
Switch Time (Ton, Toff)	1µs, 500ns	175ns, 145ns
Charge Injection	Not specified	2pC
Channel Capacitance (CS(off), CD(off))	5pF	5pF
Current - Leakage (IS(off)) (Max)	5nA	250pA
Crosstalk	-78dB @ 1MHz	-78dB @ 1MHz
Operating Temperature	0°C ~ 70°C (TA)	0°C ~ 70°C (TA)
Mounting Type	Surface Mount	Surface Mount
Package / Case	20-SSOP (0.209", 5.30mm Width)	20-SSOP (0.209", 5.30mm Width)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

The MAX333ACAP+ is a direct functional replacement for the MAX333CAP+. Both devices maintain identical circuit topology, package form factor, and compliance certifications (ROHS3, MSL Level 1).

The MAX333ACAP+ is the preferred selection because it is an active product with current manufacturing support and improved electrical performance characteristics. The substitute part offers significantly lower on-state resistance (45Ohm versus 250Ohm), faster switching times (175ns/145ns versus 1µs/500ns), and reduced leakage current (250pA versus 5nA). These improvements provide enhanced signal integrity and reduced power dissipation in switching applications.

The dual supply voltage range of the MAX333ACAP+ (±4.5V ~ 20V) is slightly wider than the original part (±5V ~ 18V), providing additional design flexibility. Single supply voltage compatibility remains identical (10V ~ 30V).

Both parts are pin-compatible and require no circuit modifications for substitution. The identical 20-SSOP package ensures direct PCB-level compatibility without layout changes.

Frequently Asked Questions (FAQ)

Q: Can the MAX333ACAP+ be used as a direct replacement for MAX333CAP+ without circuit modifications?

A: Yes. Both parts share identical pin configurations, package specifications (20-SSOP), and functional architecture (4-circuit SPDT 2:1 switch). No circuit modifications are required for substitution.

Q: What are the key performance differences between MAX333CAP+ and MAX333ACAP+?

A: The MAX333ACAP+ provides superior electrical performance: on-state resistance is reduced from 250Ohm to 45Ohm, switch times are faster (175ns/145ns versus 1µs/500ns), and leakage current is lower (250pA versus 5nA). These improvements result in better signal fidelity and reduced power consumption.

Q: Are both parts RoHS compliant?

A: Yes. Both MAX333CAP+ and MAX333ACAP+ are ROHS3 compliant with MSL Level 1 (Unlimited) moisture sensitivity rating, meeting current environmental and manufacturing standards.

Q: What is the significance of the MAX333CAP+ being classified as obsolete?

A: Obsolete status indicates the part is no longer in active production. The MAX333ACAP+ is the active equivalent, ensuring continued availability, manufacturing support, and access to current supply chain inventory.

Q: Are the supply voltage ranges compatible between the two parts?

A: Yes. Single supply voltage ranges are identical (10V ~ 30V). Dual supply voltage ranges are compatible, with MAX333ACAP+ offering a slightly extended range (±4.5V ~ 20V versus ±5V ~ 18V), providing additional design flexibility.

Q: What is the package form factor for both parts?

A: Both parts use the 20-SSOP (Small Shrink Outline Package) with 0.209" width and 5.30mm body width, ensuring identical PCB footprint and mounting compatibility.

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