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MAX4521EEE Equivalent & Substitute Parts
Part Overview
The MAX4521EEE is a 4-circuit SPST-NC (Single-Pole Single-Throw Normally Closed) analog switch IC manufactured by Analog Devices Inc./Maxim Integrated. This component features a 100Ohm on-state resistance and operates across a supply voltage range of 2V to 12V (single supply) or ±2V to ±6V (dual supply). The device is classified as obsolete, which necessitates identification of functionally equivalent alternatives for new designs and ongoing production requirements.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Switch Circuit Type | SPST - NC (Normally Closed) |
| Number of Circuits | 4 |
| On-State Resistance (Max) | 100Ohm |
| Channel-to-Channel Matching (ΔRon) | 1Ohm |
| Voltage - Supply, Single (V+) | 2V ~ 12V |
| Voltage - Supply, Dual (V±) | ±2V ~ 6V |
| Switch Time (Ton, Toff) (Max) | 80ns, 30ns |
| Charge Injection | 1pC |
| Channel Capacitance (CS(off), CD(off)) | 2pF, 2pF |
| Current - Leakage (IS(off)) (Max) | 1nA |
| Crosstalk | -90dB @ 100kHz |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Package / Case | 16-SSOP (0.154", 3.90mm Width) |
| RoHS Status | RoHS non-compliant |
| Product Status | Obsolete |
Substitute Part Grouping Explanation
Substitution of the MAX4521EEE is determined by the following critical parameters:
- Switch Circuit Configuration: SPST-NC topology (4 circuits)
- On-State Resistance: Maximum 100Ohm specification
- Supply Voltage Compatibility: Single supply 2V–12V or dual supply ±2V–±6V
- Switching Performance: Ton/Toff specifications of 80ns/30ns
- Package Compatibility: 16-SSOP form factor with 3.90mm width
- Electrical Characteristics: Charge injection, capacitance, leakage current, and crosstalk performance
Substitute parts are grouped into two categories:
Category 1: Direct Packaging Equivalents – Parts maintaining identical electrical specifications and 16-SSOP packaging with alternative packaging formats (Tube vs. Tape & Reel).
Category 2: Functional Alternatives – Parts with SPST-NC topology and 4-circuit configuration but with modified on-state resistance, supply voltage ranges, or package form factors (16-TSSOP). These alternatives require design verification for compatibility with the original application's electrical requirements.
Parameter Comparison
| Part Number | Manufacturer | Switch Circuit | Circuits | Ron (Max) | V+ Supply | V± Supply | Ton/Toff (Max) | Package | Product Status | RoHS Status |
|---|---|---|---|---|---|---|---|---|---|---|
| MAX4521EEE | Analog Devices Inc./Maxim | SPST - NC | 4 | 100Ohm | 2V ~ 12V | ±2V ~ 6V | 80ns, 30ns | 16-SSOP | Obsolete | Non-compliant |
| MAX4521EEE+ | Analog Devices Inc./Maxim | SPST - NC | 4 | 100Ohm | 2V ~ 12V | ±2V ~ 6V | 80ns, 30ns | 16-SSOP | Active | ROHS3 Compliant |
| ADG1211YRUZ | Analog Devices Inc. | SPST - NC | 4 | 190Ohm | 5V ~ 16.5V | ±4.5V ~ 16.5V | 130ns, 115ns | 16-TSSOP | Active | ROHS3 Compliant |
| ADG1211YRUZ-REEL | Analog Devices Inc. | SPST - NC | 4 | 190Ohm | 5V ~ 16.5V | ±4.5V ~ 16.5V | 130ns, 115ns | 16-TSSOP | Active | ROHS3 Compliant |
| ADG1211YRUZ-REEL7 | Analog Devices Inc. | SPST - NC | 4 | 190Ohm | 5V ~ 16.5V | ±4.5V ~ 16.5V | 130ns, 115ns | 16-TSSOP | Active | ROHS3 Compliant |
| ADG1311YRUZ | Analog Devices Inc. | SPST - NC | 4 | 200Ohm | 12V | ±15V | 125ns, 50ns | 16-TSSOP | Active | ROHS3 Compliant |
| ADG1311YRUZ-REEL7 | Analog Devices Inc. | SPST - NC | 4 | 200Ohm | 12V | ±15V | 125ns, 50ns | 16-TSSOP | Active | ROHS3 Compliant |
| ADG1412YRUZ | Analog Devices Inc. | SPST - NO | 4 | 1.8Ohm | 5V ~ 16.5V | ±4.5V ~ 16.5V | 150ns, 120ns | 16-TSSOP | Active | ROHS3 Compliant |
| ADG1412YRUZ-REEL7 | Analog Devices Inc. | SPST - NO | 4 | 1.8Ohm | 5V ~ 16.5V | ±4.5V ~ 16.5V | 150ns, 120ns | 16-TSSOP | Active | ROHS3 Compliant |
| ADG1611BRUZ | Analog Devices Inc. | SPST - NC | 4 | 1.1Ohm | 3.3V ~ 16V | ±3.3V ~ 8V | 156ns, 87ns | 16-TSSOP | Active | ROHS3 Compliant |
| ADG1611BRUZ-REEL | Analog Devices Inc. | SPST - NC | 4 | 1.1Ohm | 3.3V ~ 16V | ±3.3V ~ 8V | 156ns, 87ns | 16-TSSOP | Active | ROHS3 Compliant |
Engineering Selection Recommendations
Primary Recommendation: MAX4521EEE+
The MAX4521EEE+ is the direct active equivalent of the obsolete MAX4521EEE. It maintains identical electrical specifications including 100Ohm on-state resistance, 2V–12V single supply voltage range, and 16-SSOP packaging. The primary distinction is product status (Active vs. Obsolete) and RoHS3 compliance. This part is suitable for direct replacement in existing designs without circuit modification.
Secondary Recommendations for Modified Applications:
The ADG1211YRUZ, ADG1211YRUZ-REEL, and ADG1211YRUZ-REEL7 variants provide SPST-NC 4-circuit functionality with 190Ohm on-state resistance and extended supply voltage range (5V–16.5V single, ±4.5V–±16.5V dual). These are applicable when the application can accommodate higher on-state resistance and operates within the specified voltage range.
The ADG1311YRUZ and ADG1311YRUZ-REEL7 offer 200Ohm on-state resistance with fixed 12V single supply and ±15V dual supply operation. Selection requires verification that the application's supply voltage and resistance specifications align with these parameters.
The ADG1611BRUZ and ADG1611BRUZ-REEL provide significantly lower on-state resistance (1.1Ohm) with SPST-NC topology, suitable for applications requiring minimal resistance characteristics and operating within 3.3V–16V single supply or ±3.3V–±8V dual supply ranges.
All recommended alternatives carry Active product status and ROHS3 compliance certification, ensuring long-term availability and regulatory alignment.
Frequently Asked Questions (FAQ)
Q: Can MAX4521EEE+ be used as a direct replacement for MAX4521EEE?
A: Yes. The MAX4521EEE+ maintains identical electrical specifications and 16-SSOP packaging. The primary differences are product status (Active vs. Obsolete) and RoHS3 compliance. No circuit modifications are required.
Q: What is the key difference between MAX4521EEE and ADG1211YRUZ?
A: The ADG1211YRUZ has a higher on-state resistance (190Ohm vs. 100Ohm) and requires a higher minimum supply voltage (5V vs. 2V for single supply). The package form factor changes from 16-SSOP to 16-TSSOP. Application compatibility depends on whether the circuit can tolerate increased resistance and operates within the ADG1211YRUZ supply voltage range.
Q: Are ADG1412YRUZ and ADG1412YRUZ-REEL7 compatible with MAX4521EEE?
A: No. The ADG1412 series uses SPST-NO (Normally Open) topology, whereas the MAX4521EEE uses SPST-NC (Normally Closed). These are functionally different switch configurations and are not interchangeable.
Q: What packaging options are available for substitute parts?
A: Substitute parts are available in Tube, Tape & Reel (TR), and Cut Tape (CT) & Digi-Reel® packaging formats. The 16-SSOP package is available only for MAX4521EEE+. Alternative parts use 16-TSSOP packaging with 4.40mm width, which differs from the original 3.90mm width.
Q: Do all substitute parts meet RoHS compliance?
A: MAX4521EEE is RoHS non-compliant. MAX4521EEE+ and all ADG series alternatives (ADG1211, ADG1311, ADG1412, ADG1611) are ROHS3 compliant, meeting current regulatory requirements for new designs.
Q: Which substitute part has the lowest on-state resistance?
A: ADG1611BRUZ and ADG1611BRUZ-REEL offer the lowest on-state resistance at 1.1Ohm maximum. These parts operate within 3.3V–16V single supply or ±3.3V–±8V dual supply ranges and require verification of application compatibility.
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