Analog Devices Inc./Maxim Integrated MAX4517CSA

Overview

MAX4517CSA from Maxim Integrated is a normally closed (NC), single-pole/single-throw (SPST), CMOS analog switch optimized for low-voltage dual-supply operation. It delivers 20Ω on-resistance at ±5V, 1nA off-leakage at +25°C, and rail-to-rail analog signal handling - enabling precise signal routing in battery-powered audio and data-acquisition systems.

For engineers reviewing the MAX4517CSA datasheet, MAX4517CSA pinout, MAX4517CSA application, or MAX4517CSA equivalent, key selection criteria include guaranteed NC topology, SOT23-5 package compatibility, ±1V to ±6V dual-supply flexibility, low charge injection (20pC max), and fast switching (t_ON = 100ns, t_OFF = 75ns).

Technical Context

The MAX4517CSA uses a fully differential CMOS switch architecture with independent V+ and V− supply pins that define both analog signal range and internal logic thresholds. Its NC configuration means the COM–NC path remains conductive when IN = LOW, with no internal ground reference.

Logic inputs are referenced to V+, supporting CMOS-compatible levels across ±5V supplies; ESD protection diodes clamp analog pins to V+ and V−, making leakage current highly dependent on signal voltage relative to supply rails - a critical factor in precision low-current measurement paths.

Key Specifications

Pinout & Package

MAX4517CSA is housed in a 5-pin SOT23-5 package (JEDEC MO-178AA), footprint-compatible with industry-standard SOT-23 layouts and suitable for space-constrained portable designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX4517CSA, MAX4517EUK offers identical electrical performance with extended temperature coverage, while ADG1419BRMZ trades higher leakage and charge injection for significantly lower on-resistance - making it viable only in applications where signal fidelity is prioritized over precision leakage control.

Availability

MAX4517CSA 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 ranges.

Supply support for MAX4517CSA 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 MAX4516/MAX4517 family was designed specifically for low-voltage, dual-supply analog switching in portable and precision instrumentation systems - emphasizing low R_ON, ultra-low leakage, and rail-to-rail signal integrity.

FAQ

What is the default switch state of the MAX4517CSA when the IN pin is unconnected or held LOW?

The MAX4517CSA is a normally closed (NC) switch, meaning the COM–NC path is conductive when the IN pin is at logic LOW (≤1.5V with ±5V supplies). If IN is left floating, internal leakage may pull it toward V−, potentially causing unpredictable behavior; a pull-down resistor to V− is recommended to ensure defined NC operation. The MAX4517CSA datasheet explicitly defines this NC behavior as intrinsic to the device topology.

Can the MAX4517CSA operate from a single +5V supply instead of dual ±5V?

The MAX4517CSA is specified for dual-supply operation (±1V to ±6V) and is not rated for single-supply use. While it may function with V− grounded and V+ = +5V, its logic threshold (referenced to V+) and analog range become undefined, and leakage, R_ON, and ESD protection degrade. For single-supply applications, Maxim recommends the pin-compatible MAX4514/MAX4515 - the MAX4517CSA is not validated for this configuration.

How does the MAX4517CSA's charge injection of 20pC affect precision sampling circuits?

The MAX4517CSA's 20pC maximum charge injection introduces a voltage step ΔV = Q/C_L on the sampled node when the switch turns OFF. In a 10-bit 1V full-scale system with 100pF hold capacitance, this yields ~200mV error - unacceptable unless mitigated. Designers must use larger hold capacitors (e.g., ≥1nF) or correlated double sampling; the MAX4517CSA's spec enables such compensation only when C_L ≥ 200pF for <½-LSB error.

Is the SOT23-5 package of the MAX4517CSA compatible with standard reflow profiles?

Yes, the MAX4517CSA in SOT23-5 (JEDEC MO-178AA) is qualified for standard lead-free reflow per IPC/JEDEC J-STD-020. Peak temperature must not exceed +260°C for ≤60 seconds, with ramp-up rate ≤3°C/s and ramp-down rate ≤6°C/s. The package's 1.45mm max height and 0.95mm nominal body width align with automated placement equipment tolerances - confirmed in Maxim's package drawing 21-0057B for the MAX4517CSA.

Why does the MAX4517CSA specify different off-leakage values at +25°C versus +85°C?

The MAX4517CSA's off-leakage increases with temperature due to exponential growth in reverse-biased ESD diode current - the primary leakage path. At +25°C, off-leakage is guaranteed ≤1nA; at +85°C, it rises to ≤20nA. This 20× increase reflects silicon physics, not degradation. Designers using the MAX4517CSA in thermally demanding environments must size bias resistors and integrator capacitors accordingly to maintain accuracy.