MAX4533EAP Equivalent & Substitute Parts

Part Overview

The MAX4533EAP is a 4-circuit SPDT (Single Pole Double Throw) analog switch IC manufactured by Analog Devices Inc./Maxim Integrated in a 20-SSOP surface mount package. This part is classified as obsolete, which necessitates identification of functionally equivalent alternatives for new designs and ongoing production requirements. The MAX4533EAP operates as a 2:1 multiplexer/demultiplexer with 175Ω on-state resistance and supports both single supply (9V–36V) and dual supply (±4.5V–±18V) configurations.

Key Parameters

Parameter	Value
Switch Circuit Type	SPDT
Multiplexer/Demultiplexer Configuration	2:1
Number of Circuits	4
On-State Resistance (Max)	175Ω
Channel-to-Channel Matching (ΔRon)	1Ω
Voltage Supply - Single (V+)	9V–36V
Voltage Supply - Dual (V±)	±4.5V–±18V
Switch Time (Ton/Toff Max)	250ns / 150ns
Charge Injection	1.5pC
Channel Capacitance (CS(off)/CD(off))	5pF
Leakage Current (IS(off) Max)	20nA
Crosstalk	−66dB @ 1MHz
Operating Temperature	−40°C to +85°C
Package / Case	20-SSOP (0.209", 5.30mm Width)
Mounting Type	Surface Mount
RoHS Status	RoHS Non-Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the MAX4533EAP is determined by strict adherence to the following electrical and mechanical parameters:

Critical Matching Parameters:

Switch circuit type: SPDT
Multiplexer/demultiplexer configuration: 2:1
Number of circuits: 4
Package type: 20-SSOP surface mount
Operating temperature range: −40°C to +85°C

Allowable Variation Parameters:

On-state resistance: Substitutes may have lower resistance values (improved performance)
Supply voltage ranges: Substitutes may support wider or narrower ranges provided the MAX4533EAP operating range is fully contained
Switch timing: Substitutes may have faster switching characteristics
Leakage current: Substitutes may have lower leakage (improved performance)
Crosstalk: Substitutes may have better crosstalk performance

Non-Substitutable Parameters:

Circuit topology and count
Package footprint and pinout
Operating temperature range

The following parts meet these criteria as direct substitutes:

MAX4533EAP+ – Direct packaging variant (Tube vs. unspecified original packaging)
ADG333ABRSZ and ADG333ABRSZ-REEL – Lower on-state resistance (45Ω vs. 175Ω), faster switching, improved leakage performance
ISL43240IAZ and ISL43240IAZ-T – Lowest on-state resistance (25Ω), fastest switching, superior crosstalk performance

Parameter Comparison

Parameter	MAX4533EAP	MAX4533EAP+	ADG333ABRSZ / ADG333ABRSZ-REEL	ISL43240IAZ / ISL43240IAZ-T
Switch Circuit	SPDT	SPDT	SPDT	SPDT
Multiplexer Configuration	2:1	2:1	2:1	2:1
Number of Circuits	4	4	4	4
On-State Resistance (Max)	175Ω	175Ω	45Ω	25Ω
Channel-to-Channel Matching (ΔRon)	1Ω	1Ω	5Ω	500mΩ
Voltage Supply - Single (V+)	9V–36V	9V–36V	3V–30V	2.7V–12V
Voltage Supply - Dual (V±)	±4.5V–±18V	±4.5V–±18V	±3V–±20V	±2V–±6V
Switch Time Ton (Max)	250ns	250ns	90ns	65ns
Switch Time Toff (Max)	150ns	150ns	80ns	50ns
Charge Injection	1.5pC	1.5pC	2pC	5pC (Max)
Channel Capacitance (CS(off)/CD(off))	5pF	5pF	7pF	10pF / 10pF
Leakage Current (IS(off) Max)	20nA	20nA	250pA	200pA
Crosstalk	−66dB @ 1MHz	−66dB @ 1MHz	−85dB @ 1MHz	−92dB @ 1MHz
Operating Temperature	−40°C to +85°C	−40°C to +85°C	−40°C to +85°C	−40°C to +85°C
Package / Case	20-SSOP	20-SSOP	20-SSOP	20-SSOP
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Active	Active	Obsolete / Active
RoHS Status	RoHS Non-Compliant	RoHS3 Compliant	RoHS3 Compliant	RoHS3 Compliant

Engineering Selection Recommendations

MAX4533EAP+ (Direct Replacement) Select this part for applications requiring identical electrical performance and pinout compatibility with the original MAX4533EAP. The primary advantage is active product status and RoHS3 compliance. Packaging is supplied in Tube format. This is the preferred choice for direct substitution in existing designs.

ADG333ABRSZ / ADG333ABRSZ-REEL (Performance Enhancement) These parts provide superior on-state resistance (45Ω vs. 175Ω), faster switching times, and improved leakage characteristics. Both are RoHS3 compliant and active products. ADG333ABRSZ is supplied in Tube packaging; ADG333ABRSZ-REEL is supplied in Cut Tape & Digi-Reel format. Select these for new designs where lower on-state resistance and faster switching are beneficial. Supply voltage range is 3V–30V (single) and ±3V–±20V (dual), which encompasses the MAX4533EAP operating range.

ISL43240IAZ / ISL43240IAZ-T (Maximum Performance) These Renesas parts deliver the lowest on-state resistance (25Ω), fastest switching performance (65ns/50ns), and superior crosstalk attenuation (−92dB @ 1MHz). ISL43240IAZ is supplied in Tube; ISL43240IAZ-T is supplied in Tape & Reel format. Both are RoHS3 compliant. ISL43240IAZ-T is active; ISL43240IAZ is obsolete. Note that the supply voltage range is narrower (2.7V–12V single, ±2V–±6V dual), which may limit applicability in designs requiring the full MAX4533EAP voltage range. Moisture sensitivity level is MSL 3 (168 hours) versus MSL 1 for the original part.

Frequently Asked Questions (FAQ)

Q: Can MAX4533EAP+ be used as a direct drop-in replacement? A: Yes. MAX4533EAP+ is electrically and mechanically identical to MAX4533EAP, with the primary differences being active product status and RoHS3 compliance. Pinout, package footprint, and electrical specifications are identical.

Q: What are the advantages of ADG333ABRSZ over MAX4533EAP? A: ADG333ABRSZ offers significantly lower on-state resistance (45Ω vs. 175Ω), faster switching times (90ns/80ns vs. 250ns/150ns), lower leakage current (250pA vs. 20nA), and superior crosstalk performance (−85dB vs. −66dB @ 1MHz). These improvements reduce signal distortion and power dissipation in analog switching applications. The supply voltage range (3V–30V single, ±3V–±20V dual) fully encompasses the MAX4533EAP operating range.

Q: What are the limitations of ISL43240IAZ compared to MAX4533EAP? A: The primary limitation is the narrower supply voltage range (2.7V–12V single, ±2V–±6V dual). Applications requiring the full 9V–36V single supply or ±4.5V–±18V dual supply range of the MAX4533EAP cannot use ISL43240IAZ. Additionally, moisture sensitivity is higher (MSL 3 vs. MSL 1), requiring stricter handling and storage protocols. ISL43240IAZ (non-T variant) is obsolete.

Q: Are all substitute parts available in the same package? A: Yes. All substitute parts use the 20-SSOP surface mount package with identical footprint and pinout. Packaging format differs: MAX4533EAP+ and ADG333ABRSZ are supplied in Tube; ADG333ABRSZ-REEL is supplied in Cut Tape & Digi-Reel; ISL43240IAZ is supplied in Tube; ISL43240IAZ-T is supplied in Tape & Reel.

Q: Which substitute part should be selected for new designs? A: For new designs, MAX4533EAP+ is recommended for direct compatibility. For designs where improved performance is acceptable, ADG333ABRSZ or ADG333ABRSZ-REEL provide superior electrical characteristics and are both active products with RoHS3 compliance. ISL43240IAZ-T offers maximum performance but requires verification that the narrower supply voltage range is compatible with the application.

Q: Are all substitute parts RoHS compliant? A: MAX4533EAP is RoHS non-compliant. All substitute parts (MAX4533EAP+, ADG333ABRSZ, ADG333ABRSZ-REEL, ISL43240IAZ, ISL43240IAZ-T) are RoHS3 compliant.

Q: What is the difference between ADG333ABRSZ and ADG333ABRSZ-REEL? A: Both parts are electrically identical. The difference is packaging format: ADG333ABRSZ is supplied in Tube; ADG333ABRSZ-REEL is supplied in Cut Tape & Digi-Reel format. Selection depends on assembly process requirements and volume.

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