MAX4528CSA Equivalent & Substitute Parts

Part Overview

The MAX4528CSA is a dual SPDT (Single Pole Double Throw) analog switch IC manufactured by Analog Devices Inc./Maxim Integrated. This 8-SOIC surface mount device provides two independent 2:1 multiplexer/demultiplexer circuits with 110Ω on-state resistance, designed for signal routing and switching applications in analog systems. The MAX4528CSA is classified as obsolete, making identification of active equivalent parts essential for new designs and production continuity.

Key Parameters

Parameter	Value
Switch Circuit Configuration	SPDT
Number of Circuits	2
Multiplexer/Demultiplexer Circuit	2:1
On-State Resistance (Max)	110Ω
Channel-to-Channel Matching (ΔRon)	3Ω
Voltage - Supply, Single (V+)	2.7V ~ 12V
Voltage - Supply, Dual (V±)	±2.7V ~ 6V
Charge Injection	1pC
Channel Capacitance (CS(off), CD(off))	13pF
Current - Leakage (IS(off)) (Max)	500pA
Operating Temperature	0°C ~ 70°C (TA)
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the MAX4528CSA is determined by strict equivalence across all electrical and mechanical parameters. The primary substitute identified is the MAX4528CSA+, which maintains identical functional specifications:

Key Parameters for Substitution Equivalence:

Switch circuit configuration (SPDT)
Number of circuits (2)
Multiplexer/demultiplexer circuit topology (2:1)
On-state resistance (110Ω maximum)
Channel-to-channel matching (3Ω)
Supply voltage ranges (2.7V ~ 12V single; ±2.7V ~ 6V dual)
Charge injection (1pC)
Channel capacitance (13pF)
Leakage current (500pA maximum)
Operating temperature range (0°C ~ 70°C)
Package and pinout (8-SOIC)
Mounting type (Surface Mount)

The MAX4528CSA+ differs only in product status (Active vs. Obsolete) and RoHS compliance classification, with no electrical or mechanical parameter deviations.

Parameter Comparison

Parameter	MAX4528CSA	MAX4528CSA+	Match
Switch Circuit	SPDT	SPDT	✓
Number of Circuits	2	2	✓
Multiplexer/Demultiplexer Circuit	2:1	2:1	✓
On-State Resistance (Max)	110Ω	110Ω	✓
Channel-to-Channel Matching (ΔRon)	3Ω	3Ω	✓
Voltage - Supply, Single (V+)	2.7V ~ 12V	2.7V ~ 12V	✓
Voltage - Supply, Dual (V±)	±2.7V ~ 6V	±2.7V ~ 6V	✓
Charge Injection	1pC	1pC	✓
Channel Capacitance (CS(off), CD(off))	13pF	13pF	✓
Current - Leakage (IS(off)) (Max)	500pA	500pA	✓
Operating Temperature	0°C ~ 70°C (TA)	0°C ~ 70°C (TA)	✓
Package / Case	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	✓
Mounting Type	Surface Mount	Surface Mount	✓
Product Status	Obsolete	Active	—
RoHS Status	RoHS non-compliant	ROHS3 Compliant	—

Engineering Selection Recommendations

The MAX4528CSA+ is the direct functional equivalent of the MAX4528CSA. Selection between these parts should be based on the following criteria:

For New Designs: The MAX4528CSA+ is the appropriate choice due to its Active product status and ROHS3 compliance. This ensures long-term availability and alignment with current environmental and regulatory standards.

For Legacy System Maintenance: The MAX4528CSA may be selected if existing inventory is available and regulatory compliance is not a design constraint. However, availability is limited due to obsolete status.

Compliance Considerations: Applications subject to RoHS3 requirements must use the MAX4528CSA+. Applications without RoHS compliance mandates may use either part, provided supply chain continuity is confirmed.

Frequently Asked Questions (FAQ)

Q: Are the MAX4528CSA and MAX4528CSA+ pin-compatible? A: Yes. Both devices use the 8-SOIC package with identical pinout and electrical characteristics. Direct PCB substitution is possible without design modification.

Q: What is the difference between MAX4528CSA and MAX4528CSA+? A: The parts are electrically and mechanically identical. The primary differences are product status (Obsolete vs. Active) and RoHS compliance classification (non-compliant vs. ROHS3 compliant). The "+" suffix indicates the active production variant.

Q: Can I use MAX4528CSA+ in place of MAX4528CSA in existing designs? A: Yes. The MAX4528CSA+ maintains all electrical and mechanical specifications of the MAX4528CSA, making it a direct substitute for both new and existing applications.

Q: What packaging options are available? A: The MAX4528CSA is supplied in Tape & Reel packaging, while the MAX4528CSA+ is available in Tube packaging. Both use the 8-SOIC form factor. Packaging selection depends on production volume and handling requirements.

Q: Are there any temperature or supply voltage limitations I should consider? A: Both parts operate identically across the specified ranges: 0°C to 70°C ambient temperature and 2.7V to 12V single supply (or ±2.7V to ±6V dual supply). No derating is required between the two variants.

Q: What is the on-state resistance specification? A: Both parts specify a maximum on-state resistance of 110Ω with channel-to-channel matching of 3Ω. This ensures predictable signal attenuation and balanced performance across both switch circuits.

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