Analog Devices Inc./Maxim Integrated MAX4515CSA+

Overview

MAX4515CSA+ 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, guarantees ≤20nA off-leakage at +85°C, and supports TTL/CMOS logic compatibility with +5V supply - ideal for battery-powered audio/video switching and low-voltage data acquisition.

For engineers reviewing the MAX4515CSA+ datasheet, MAX4515CSA+ pinout, MAX4515CSA+ application, or MAX4515CSA+ equivalent, key selection criteria include verified NC configuration, SOT23-5 package footprint, guaranteed on-resistance flatness (≤3Ω), charge injection (10pC), and break-before-make timing behavior confirmed across temperature and supply voltage ranges.

Technical Context

The MAX4515CSA+ implements a CMOS transmission-gate architecture with internal level translators enabling full rail-to-rail analog signal handling up to V+. Its digital control input accepts 0.8V–2.4V logic thresholds at +5V supply, ensuring direct interface with standard TTL/CMOS outputs without external level shifting.

Internal ESD diodes clamp analog pins to V+ and GND, defining absolute maximum analog signal range as –0.3V to (V+ + 0.3V). Leakage current originates exclusively from reverse-biased ESD diodes - not inter-terminal conduction - and varies predictably with analog voltage position relative to supply rails.

Key Specifications

Pinout & Package

SOT23-5 surface-mount package (3.0mm × 1.7mm × 1.3mm body, 0.95mm pitch), RoHS-compliant, tape-and-reel packaged per EIA-481-1 standard.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX4515ESA+, the MAX4515CSA+ trades temperature range for lower cost and shorter lead time in commercial applications; versus ADG1219BRMZ-REEL7, it offers tighter leakage control and proven break-before-make timing - critical for glitch-free multiplexing in precision measurement systems.

Availability

MAX4515CSA+ is available at Aetrix Electronics and suitable for battery-operated equipment, audio/video signal routing, and low-voltage data-acquisition systems requiring stable component supply across commercial temperature grades.

Supply support for MAX4515CSA+ 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) designs precision analog, mixed-signal, and power-management ICs for industrial, communications, computing, and consumer applications.

The MAX4514/MAX4515 family targets low-voltage, low-distortion analog signal routing in space-constrained, battery-sensitive systems - emphasizing rail-to-rail operation, minimal charge injection, and guaranteed leakage performance over temperature.

FAQ

What is the correct logic polarity for controlling the MAX4515CSA+ switch state?

The MAX4515CSA+ is a normally closed (NC) switch: applying a logic LOW (≤0.8V) to the IN pin closes the switch (COM ↔ NC path conductive), while a logic HIGH (≥2.4V) opens it. This active-low behavior is intrinsic to the MAX4515CSA+ design and matches its truth table - no external inversion is required for basic NC functionality.

Can the MAX4515CSA+ operate from a +3.3V supply, and what on-resistance should be expected?

Yes, the MAX4515CSA+ supports +3.3V single-supply operation within its +2V to +12V range. At +3.3V, typical on-resistance is ~35Ω (max 50Ω per +3V supply specs), significantly higher than the 10Ω achieved at +12V. System designers must verify signal integrity and voltage drop under worst-case load conditions when using sub-5V supplies.

Is the SOT23-5 package of the MAX4515CSA+ pin-compatible with other Maxim analog switches like the MAX4514CSA+?

Yes - the MAX4515CSA+ and MAX4514CSA+ share identical SOT23-5 pinouts and footprints. Both use pin 1 (NC), pin 2 (IN), pin 3 (GND), pin 4 (V+), and pin 5 (COM). The only functional difference is switch state: MAX4515CSA+ is NC, MAX4514CSA+ is NO. This allows board-level reuse with only firmware/control logic changes.

How does charge injection of the MAX4515CSA+ affect ADC sampling accuracy, and what load capacitance triggers concern?

With 10pC charge injection, the MAX4515CSA+ induces a voltage glitch ΔV = Q/C_L on the load. For a 10nF sample capacitor, ΔV = 1mV - potentially degrading 12-bit+ ADC accuracy. Designers should limit C_L to ≤1nF for sub-10-bit systems or add a small series resistor to dampen transient currents when driving high-capacitance ADC inputs directly.

Does the MAX4515CSA+ require external ESD protection when used in handheld devices?

No - the MAX4515CSA+ integrates >2000V HBM ESD protection on all pins via internal diodes to V+ and GND. This meets IEC 61000-4-2 Level 2 requirements for contact discharge. However, system-level protection (e.g., TVS on connectors) remains recommended for harsh environments, as internal clamps handle only transient energy, not sustained overvoltage.