Manufacturer Part Number

MAX4603EWE

Description

Quad single-pole, single-throw (SPST) analog switch IC. Handles both normally open (NO) and normally closed (NC) signals. 2.5 Ohm low on-resistance. 16-pin SOIC package. Designed for analog and digital signal switching. Obsolete part, new original inventory is limited.

Specifications

Number of switches: 4 (independent circuits)

Switch type: SPST (NO/NC)

On-state resistance (Ron): Max 2.5 Ohm

Channel-to-channel matching: Max 100 mOhm

Supply voltage (single): 4.5V to 36V

Supply voltage (dual): ±4.5V to ±20V

Switch time (Ton/Toff): 250 ns / 350 ns (max)

Charge injection: 120 pC

Channel capacitance: 55 pF (off)

Leakage current (off): Max 500 pA

Crosstalk: -59 dB at 1 MHz

Operating temperature: -40°C to +85°C (industrial)

Mounting: Surface mount, 16-SOIC package

RoHS Status: Not RoHS compliant

Moisture Sensitivity Level: 1 (unlimited)

REACH Status: unaffected

Product status: obsolete

Device Structure

Includes four independent single-pole, single-throw analog switches. Each switch can connect or disconnect seamlessly. Input and output pins are symmetric to support bidirectional signal flow. Designed for voltage operation range that supports single or dual supplies. Packaged in standard 16-lead SOIC for surface mounting.

Performance Characteristics

Low on-resistance for minimal signal loss and distortion

Fast switch times for applications needing quick response

Low channel capacitance to reduce signal coupling

High crosstalk isolation for clean signal separation

Extremely low leakage current, making it suitable for precision signal paths

2.5 Ohm on-resistance ensures good transparency for analog signals

Application Environments

Signal switching and routing in measurement and control equipment

Data acquisition systems, test instruments, and medical equipment

Communication equipment that needs analog signal selection

Logic signal routing and multiplexing

General-purpose analog/digital switch or multiplexer needs

Selection Guidelines

Choose for designs operating within 4.5V-36V (single) or ±4.5V-20V (dual)

Prefer for applications requiring low on-resistance and limited channel count (four circuits)

Consider if design requires both normally-open and normally-closed switch configurations

Ideal for applications needing wide supply voltage tolerance and precise analog switching

Not suitable if RoHS compliance is mandatory

Usage Considerations

Ensure device is mounted with correct orientation (16-SOIC)

Maintain supply voltages within specified ranges

Anti-static handling is advisable to avoid ESD damage

Avoid usage in designs needing extended temperature or harsh environment operation

Not recommended for new designs due to obsolete status and lack of RoHS compliance

Check for substitute components if designing for future production

Potential Equivalent/Replacement Models

There are possible substitute models such as MAX4603EWE+ (lead-free/RoHS version), and potentially alternative IC switches with similar numbers from Maxim Integrated or Analog Devices:

MAX4603EWE+ (RoHS compliant version)

Other possible alternates: MAX4600EWE, MAX4601EWE, MAX4602EWE, or similar quad SPST switches (check pinout and electrical match)

For a comprehensive alternatives list and second sources, contact the Ariat-Tech sales team for expert support.

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