MAX333ACAP Equivalent & Substitute Parts

Part Overview

The MAX333ACAP is a 4-circuit SPDT analog switch IC manufactured by Analog Devices Inc./Maxim Integrated, housed in a 20-SSOP surface mount package. This component functions as a 2:1 multiplexer/demultiplexer with 45Ohm on-state resistance, designed for signal routing and switching applications in analog systems.

The MAX333ACAP carries an Obsolete product status. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support long-term product availability for applications currently utilizing this component.

Key Parameters

Parameter	Value
Switch Circuit Configuration	SPDT (Single Pole Double Throw)
Multiplexer/Demultiplexer Circuit	2:1
Number of Circuits	4
On-State Resistance (Max)	45Ohm
Channel-to-Channel Matching (ΔRon)	2Ohm (Max)
Voltage - Supply, Single (V+)	10V ~ 30V
Voltage - Supply, Dual (V±)	±4.5V ~ 20V
Switch Time (Ton, Toff) (Max)	175ns, 145ns
Charge Injection	2pC
Channel Capacitance (CS(off), CD(off))	5pF
Current - Leakage (IS(off)) (Max)	250pA
Crosstalk	-78dB @ 1MHz
Operating Temperature	0°C ~ 70°C (TA)
Package / Case	20-SSOP (0.209", 5.30mm Width)
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the MAX333ACAP is determined by the following critical parameters:

Switch Circuit Configuration: Must be SPDT
Multiplexer/Demultiplexer Circuit: Must be 2:1
Number of Circuits: Must be 4
Package / Case: Must be 20-SSOP (0.209", 5.30mm Width)
Mounting Type: Must be Surface Mount

Secondary parameters that define functional equivalence include on-state resistance, supply voltage ranges, switch timing, and leakage characteristics. Substitute parts must maintain compatibility within the electrical and mechanical constraints of the original design.

The identified substitute parts are grouped into two categories:

Direct Manufacturer Variants (MAX333ACAP+): Identical electrical specifications with improved product status and RoHS compliance.

Manufacturer-Recommended Alternatives (ADG333ABRSZ, ADG333ABRSZ-REEL, ISL43240IAZ, ISL43240IAZ-T): Parts meeting core functional requirements with variations in secondary electrical parameters and operating temperature ranges.

Parameter Comparison

Parameter	MAX333ACAP	MAX333ACAP+	ADG333ABRSZ	ADG333ABRSZ-REEL	ISL43240IAZ	ISL43240IAZ-T
Switch Circuit	SPDT	SPDT	SPDT	SPDT	SPDT	SPDT
Multiplexer/Demultiplexer	2:1	2:1	2:1	2:1	2:1	2:1
Number of Circuits	4	4	4	4	4	4
On-State Resistance (Max)	45Ohm	45Ohm	45Ohm	45Ohm	25Ohm	25Ohm
Channel-to-Channel Matching (ΔRon)	2Ohm (Max)	2Ohm (Max)	5Ohm	5Ohm	500mOhm	500mOhm
Voltage - Supply, Single (V+)	10V ~ 30V	10V ~ 30V	3V ~ 30V	3V ~ 30V	2.7V ~ 12V	2.7V ~ 12V
Voltage - Supply, Dual (V±)	±4.5V ~ 20V	±4.5V ~ 20V	±3V ~ 20V	±3V ~ 20V	±2V ~ 6V	±2V ~ 6V
Switch Time (Ton, Toff) (Max)	175ns, 145ns	175ns, 145ns	90ns, 80ns (Typ)	90ns, 80ns (Typ)	65ns, 50ns	65ns, 50ns
Charge Injection	2pC	2pC	2pC	2pC	5pC (Max)	5pC (Max)
Channel Capacitance (CS(off), CD(off))	5pF	5pF	7pF	7pF	10pF, 10pF	10pF, 10pF
Current - Leakage (IS(off)) (Max)	250pA	250pA	250pA	250pA	200pA	200pA
Crosstalk	-78dB @ 1MHz	-78dB @ 1MHz	-85dB @ 1MHz	-85dB @ 1MHz	-92dB @ 1MHz	-92dB @ 1MHz
Operating Temperature	0°C ~ 70°C (TA)	0°C ~ 70°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)
Package / Case	20-SSOP	20-SSOP	20-SSOP	20-SSOP	20-SSOP	20-SSOP
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active	Active	Obsolete	Active

Engineering Selection Recommendations

MAX333ACAP+ (Direct Upgrade)

The MAX333ACAP+ is the primary recommended substitute. It maintains identical electrical specifications and 20-SSOP packaging while transitioning to Active product status and ROHS3 compliance. This part provides direct functional equivalence with improved long-term availability and regulatory alignment.

ADG333ABRSZ and ADG333ABRSZ-REEL (Analog Devices Alternative)

Both ADG333ABRSZ variants are Active products with ROHS3 compliance. They maintain the 45Ohm on-state resistance and 20-SSOP package. The ADG333ABRSZ-REEL variant offers Cut Tape and Digi-Reel packaging options. These parts feature expanded supply voltage ranges (3V minimum vs. 10V) and extended operating temperature (-40°C to 85°C vs. 0°C to 70°C), providing enhanced flexibility for diverse application environments.

ISL43240IAZ-T (Renesas Active Alternative)

The ISL43240IAZ-T is an Active product with ROHS3 compliance and Tape & Reel packaging. It provides superior electrical performance with 25Ohm on-state resistance, faster switching times (65ns/50ns), and improved crosstalk performance (-92dB). However, it operates within a narrower supply voltage range (2.7V to 12V single supply) and requires design verification for voltage compatibility.

ISL43240IAZ (Renesas Obsolete Alternative)

The ISL43240IAZ shares identical specifications with ISL43240IAZ-T but carries Obsolete product status. This part is not recommended for new designs due to supply chain risk.

Frequently Asked Questions (FAQ)

Q: Can MAX333ACAP+ be used as a direct replacement for MAX333ACAP?

A: Yes. MAX333ACAP+ maintains identical electrical specifications, on-state resistance, switching characteristics, and 20-SSOP packaging. The primary differences are Active product status and ROHS3 compliance, making it a direct functional equivalent.

Q: What are the key differences between ADG333ABRSZ and ISL43240IAZ?

A: Both maintain the 4-circuit SPDT 2:1 configuration and 20-SSOP package. ADG333ABRSZ retains 45Ohm on-state resistance matching the original MAX333ACAP, while ISL43240IAZ reduces this to 25Ohm. ISL43240IAZ offers faster switching (65ns vs. 90ns) and superior crosstalk performance (-92dB vs. -85dB). However, ISL43240IAZ operates within a narrower supply voltage range (2.7V to 12V vs. 3V to 30V), requiring verification against application requirements.

Q: Are all substitute parts compatible with the original MAX333ACAP PCB layout?

A: Yes. All identified substitutes use the 20-SSOP (0.209", 5.30mm Width) package with identical pinout and surface mount configuration, ensuring direct PCB compatibility without layout modifications.

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

A: MAX333ACAP+ and ADG333ABRSZ-REEL are recommended for long-term availability. Both carry Active product status and ROHS3 compliance. ADG333ABRSZ-REEL offers additional supply flexibility through Cut Tape and Digi-Reel packaging options.

Q: Can ISL43240IAZ be used in applications requiring the full 10V to 30V supply range?

A: No. ISL43240IAZ operates within a 2.7V to 12V single supply range, which does not cover the original MAX333ACAP specification of 10V to 30V. Design verification is required to confirm voltage compatibility before substitution.

Q: What is the impact of different on-state resistance values on circuit performance?

A: On-state resistance affects signal attenuation and impedance matching. MAX333ACAP and ADG333ABRSZ maintain 45Ohm, while ISL43240IAZ reduces this to 25Ohm. Lower resistance reduces signal loss but may require impedance matching adjustments in high-frequency applications. Verify against application signal levels and frequency requirements.

Q: Are there packaging differences between the substitute parts?

A: MAX333ACAP+ is supplied in Tube packaging. ADG333ABRSZ is supplied in Tube packaging, while ADG333ABRSZ-REEL is supplied in Cut Tape and Digi-Reel formats. ISL43240IAZ is supplied in Tube packaging, and ISL43240IAZ-T is supplied in Tape & Reel format. Select packaging based on assembly process requirements and volume needs.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message