Analog Devices Inc./Maxim Integrated MAX4580CWE+

Overview

The MAX4580CWE+ from Maxim Integrated is a dual SPST CMOS analog switch with two normally closed (NC) channels, designed for rail-to-rail signal routing in precision analog systems. It delivers 1.25Ω max on-resistance, 0.25Ω max R_ON match between channels, and 0.3Ω max R_ON flatness over ±10V signal range, operating from +4.5V to +36V single supply or ±4.5V to ±20V dual supplies. It is used in automatic test equipment for reed relay replacement where low distortion and high reliability are critical.

For engineers reviewing the MAX4580CWE+ datasheet, MAX4580CWE+ pinout, MAX4580CWE+ application, or MAX4580CWE+ equivalent, key selection criteria include guaranteed R_ON matching, TTL/CMOS-compatible logic thresholds at +12V supply, ESD protection >2kV, and NC-switch topology for fail-safe signal path integrity in power-sensitive instrumentation.

Technical Context

The MAX4580CWE+ implements a dual-channel, normally closed (NC) SPST analog switch architecture using CMOS process technology. Each channel features matched on-resistance (≤0.25Ω difference), flat on-resistance (≤0.3Ω variation across ±10V input range), and rail-to-rail analog signal handling capability up to ±20V differential supply.

It supports both single-supply (+4.5V to +36V) and dual-supply (±4.5V to ±20V) operation with independent logic supply (VL) pin for level-shifting control inputs. Digital inputs meet TTL/CMOS thresholds (0.8V low, 2.4V high) when operated with +12V or ±15V supplies, enabling direct interface with standard logic families without level translation.

Key Specifications

Pinout & Package

MAX4580CWE+ uses a 16-pin Wide SOIC (SOIC-W) package with 0.300" body width and standard lead pitch. Pin functions are validated per Maxim's official pin description table and top-view schematic.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX4590CWE+ and ADG1419BRUZ, the MAX4580CWE+ uniquely provides NC topology with best-in-class R_ON matching (0.25Ω) and flatness (0.3Ω), making it the preferred choice for safety-critical, high-precision analog routing where default-closed behavior and minimal gain error are mandatory.

Availability

MAX4580CWE+ is available at Aetrix Electronics and suitable for automatic test equipment, communication system signal routing, and PBX line interface designs requiring stable component supply, long-term manufacturability, and guaranteed parametric performance across temperature.

Supply support for MAX4580CWE+ 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 computing markets.

The MAX4580 series belongs to Maxim's precision analog switch product line, engineered specifically for reed relay replacement and high-fidelity signal routing in test, measurement, and telecom infrastructure where low R_ON, tight matching, and rail-to-rail operation are essential.

FAQ

What is the maximum supply voltage rating for MAX4580CWE+?

The MAX4580CWE+ supports absolute maximum ratings of +44V on V+ relative to GND and −44V on V− relative to GND, with V+ to V− differential limited to 44V. For reliable operation, use within the recommended ranges: +4.5V to +36V single supply or ±4.5V to ±20V dual supplies. Exceeding these may cause permanent damage.

Does MAX4580CWE+ require external level-shifting for TTL/CMOS logic control?

No. The MAX4580CWE+ features built-in TTL/CMOS-compatible logic thresholds (0.8V low, 2.4V high) when operated with +12V single supply or ±15V dual supplies. Its VL pin allows independent logic supply setting, eliminating the need for external level shifters when interfacing with standard microcontrollers or FPGAs.

How does the NC (normally closed) configuration of MAX4580CWE+ affect system safety?

The NC configuration ensures that both analog paths remain closed when control inputs are inactive or during power loss. This fail-safe behavior maintains signal continuity in critical applications like ATE interlocks or PBX line supervision, preventing open-circuit faults that could disrupt monitoring or violate safety standards such as IEC 61000-4-5.

What is the guaranteed R_ON flatness specification for MAX4580CWE+ and why does it matter?

The MAX4580CWE+ guarantees R_ON flatness of ≤0.3Ω over the specified ±10V analog signal range. This ensures minimal variation in on-resistance as the signal swings - critical for maintaining THD <−90dB in audio paths and gain accuracy <0.01% in precision instrumentation, where nonlinearity would otherwise introduce harmonic distortion or measurement error.

Can MAX4580CWE+ operate with asymmetric dual supplies, such as +12V and −5V?

Yes. The MAX4580CWE+ supports asymmetric dual supplies as long as V+ and V− remain within their absolute maximum ratings (V+ to GND ≤ +44V, V− to GND ≥ −44V, and V+ to V− ≤ +44V). Performance parameters like R_ON and leakage are characterized across the full ±4.5V to ±20V symmetric range, but functionality is maintained under asymmetric conditions typical in mixed-signal systems.