Analog Devices Inc./Maxim Integrated MAX4515EUK

Overview

MAX4515EUK from Maxim Integrated is a normally closed (NC), single-pole/single-throw (SPST), CMOS analog switch optimized for low-voltage, rail-to-rail signal routing. It operates from a single +2V to +12V supply, delivers 10Ω on-resistance at +12V, supports ≤1nA off-leakage at +25°C, and switches in 100ns turn-off time - enabling precision signal path control in battery-powered audio and data-acquisition systems.

For engineers reviewing the MAX4515EUK datasheet, MAX4515EUK pinout, MAX4515EUK application, or MAX4515EUK equivalent, key selection criteria include guaranteed NC state at power-up, SOT23-5 package compatibility with space-constrained PCBs, temperature-stable on-resistance flatness (≤3Ω over signal range), and TTL/CMOS logic compatibility at +5V supply.

Technical Context

The MAX4515EUK implements a complementary CMOS transmission gate architecture with internal level-shifting logic, enabling rail-to-rail analog signal handling across its full +2V to +12V supply range. Its digital input accepts 0.8V–2.4V logic thresholds at +5V, scaling to ~3.0V high-threshold at +12V supply.

ESD protection diodes are integrated between each analog terminal (COM, NC) and both V+ and GND, defining absolute maximum analog voltage limits as -0.3V to (V+ + 0.3V). Leakage current originates exclusively from these reverse-biased diodes - not inter-terminal conduction - and varies predictably with signal voltage and temperature.

Key Specifications

Pinout & Package

SOT23-5 surface-mount package (3.099mm × 1.499mm × 1.17mm), RoHS-compliant, tape-and-reel packaged for automated assembly.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar SPST analog switch applications.

Compared with MAX4515CUK, the MAX4515EUK extends operational reliability to harsh environments; compared with TS5A23157DCUR, it guarantees fail-safe NC operation and superior leakage performance at elevated temperatures - critical for battery-backed instrumentation and automotive infotainment.

Availability

MAX4515EUK is available at Aetrix Electronics and suitable for battery-operated equipment, low-voltage data-acquisition systems, and cellular phone baseband designs requiring stable component supply across industrial temperature ranges.

Supply support for MAX4515EUK includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Maxim Integrated (now part of Analog Devices) is a U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, communications, and consumer applications.

The MAX4514/MAX4515 family was designed specifically for low-voltage, low-on-resistance analog switching in portable and space-constrained systems - prioritizing rail-to-rail signal integrity, ultra-low leakage, and robust logic-level compatibility.

FAQ

What is the default switch state of the MAX4515EUK at power-up?

The MAX4515EUK is a normally closed (NC) analog switch: when the IN pin is low (≤0.8V) or unconnected (floating), the NC and COM terminals remain conductive. At power-up with no control signal applied, internal bias ensures NC–COM continuity - providing fail-safe signal path retention critical for safety-critical or battery-backup systems. This behavior is inherent to the MAX4515EUK silicon design and does not require external components.

Does the MAX4515EUK support rail-to-rail analog signals with a +3.3V supply?

Yes, the MAX4515EUK supports rail-to-rail analog signals from GND to V+ across its full +2V to +12V supply range, including +3.3V. At +3.3V, on-resistance is typically 35Ω (max 50Ω per datasheet), and off-leakage remains ≤20nA at +85°C. The device maintains guaranteed logic thresholds (0.8V low / 2.4V high) at +3.3V, ensuring reliable control from standard 3.3V microcontrollers without level translation.

Can the MAX4515EUK be used in bidirectional signal paths?

Yes, the MAX4515EUK supports fully bidirectional analog signal flow between NC and COM terminals. The datasheet explicitly states "NO, NC, and COM pins are identical and interchangeable. Any may be considered as an input or an output; signals pass equally well in both directions." This symmetry enables flexible PCB layout and eliminates directionality constraints in audio routing, sensor multiplexing, and bus isolation applications using the MAX4515EUK.

What is the maximum analog signal frequency supported by the MAX4515EUK?

The MAX4515EUK maintains usable signal integrity up to 250MHz in 50Ω systems, with -3dB bandwidth exceeding this range. Off-isolation degrades at ~20dB/decade above 10MHz (e.g., -45dB at 10MHz, -65dB at 100MHz), making it suitable for audio (20Hz–20kHz), baseband IF (up to ~10MHz), and low-speed digital signal routing. For RF applications >100MHz, layout parasitics dominate performance - the MAX4515EUK's 14pF off-capacitance must be accounted for in impedance-matched designs.

How does charge injection of the MAX4515EUK affect precision ADC sampling?

The MAX4515EUK's guaranteed 10pC max charge injection introduces a voltage glitch ΔV = Q/C_L on sampling capacitors. For a 1000pF hold capacitor, this yields ≤10mV step - manageable in 12-bit systems (LSB = 2.44mV at 10V full scale) but requiring settling time analysis. In high-resolution ADC front-ends, pairing the MAX4515EUK with a buffer amplifier minimizes effective C_L and reduces glitch impact - a key design consideration confirmed in MAX4515EUK application notes.