Analog Devices Inc./Maxim Integrated MAX4601CAE+

Overview

MAX4601CAE+ from Maxim Integrated is a quad SPST normally closed (NC) analog switch IC designed for precision signal routing in rail-to-rail analog paths. It delivers 2.5Ω max on-resistance, 0.5Ω max R_ON match between channels, and 2.5nA max off-leakage at +85°C, operating from single +4.5V to +36V or dual ±4.5V to ±20V supplies. It is used in automatic test equipment for reed relay replacement where low distortion and high reliability are critical.

For engineers reviewing the MAX4601CAE+ datasheet, MAX4601CAE+ pinout, MAX4601CAE+ application, or MAX4601CAE+ equivalent, key selection criteria include guaranteed R_ON flatness (0.5Ω max), TTL/CMOS-compatible logic thresholds (+0.8V/+2.4V), ESD protection >2000V, and NC-switch topology confirmed for this specific variant.

Technical Context

The MAX4601CAE+ implements four independent CMOS-based SPST switches with normally closed configuration-each COM terminal connects to its NC terminal when the control input is logic low. Its architecture supports rail-to-rail analog signal handling across the full supply range, with matched channel performance validated over temperature (–40°C to +85°C).

It features separate analog (V+, V–) and logic (VL) supply rails, enabling mixed-voltage system interfacing. Input logic thresholds are fixed at +0.8V (low) and +2.4V (high), ensuring compatibility with TTL and CMOS drivers without level-shifting when operated from ±15V or +12V supplies.

Key Specifications

Pinout & Package

MAX4601CAE+ is housed in a 16-pin SSOP (Shrink Small Outline Package) with 0.65mm lead pitch, optimized for high-density PCB layouts while maintaining thermal and mechanical reliability in industrial environments.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX4602CAE+, the MAX4601CAE+ provides fail-safe continuity in power-loss scenarios, while ADG1412BRUZ offers superior R_ON and speed but requires design-level adaptation to replicate NC behavior - making MAX4601CAE+ the only direct functional match for NC-critical applications.

Availability

MAX4601CAE+ is available at Aetrix Electronics and suitable for automatic test equipment, avionics signal conditioning, and high-reliability audio routing requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX4601CAE+ 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 semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, communications, and computing applications.

The MAX4601 series belongs to Maxim's precision analog switch product line, engineered specifically for reed relay replacement and low-distortion signal routing in test, measurement, and safety-critical systems.

FAQ

What is the default switch state of MAX4601CAE+?

The MAX4601CAE+ features four normally closed (NC) SPST switches: each COM pin is internally connected to its corresponding NC pin when the control input (INx) is logic low (≤0.8V). This fail-safe default ensures signal continuity during power-down or controller reset - a key distinction from NO variants like MAX4602CAE+. The NC behavior is intrinsic to the MAX4601CAE+ silicon design and cannot be altered by external circuitry.

Can MAX4601CAE+ operate from a single +5V supply?

No - the absolute minimum single-supply voltage for MAX4601CAE+ is +4.5V, and operation at +5V is outside its specified range. Electrical characteristics including R_ON, leakage, and logic thresholds are only guaranteed from +4.5V to +36V. At +5V, parameters such as on-resistance may exceed 2.5Ω max and input thresholds may shift, risking unreliable switching. For +5V systems, consider the MAX4617 or ADG1419 as alternatives explicitly rated down to +3V.

Does MAX4601CAE+ require external protection diodes for overvoltage?

MAX4601CAE+ includes internal ESD protection diodes on all pins, rated >2000V per Method 3015.7. External diodes are not required for ESD robustness. However, if analog signals may exceed V+ or fall below V−, external series diodes (as shown in Figure 1 of the datasheet) are recommended to prevent latch-up - though this reduces usable signal range by one diode drop and is not needed for standard rail-to-rail operation within supply limits.

How does temperature affect R_ON in MAX4601CAE+?

R_ON in MAX4601CAE+ increases with temperature: typical R_ON rises from ~3Ω at –40°C to ~4Ω at +85°C under +12V single-supply conditions (per Figure TOC02). The datasheet guarantees ≤2.5Ω max only at +25°C; at full operating range (–40°C to +85°C), R_ON remains ≤4.5Ω. This monotonic increase is process-characterized and repeatable - critical for gain-calibrated systems where channel-to-channel R_ON match (≤0.5Ω) holds across temperature.

Is MAX4601CAE+ pin-compatible with MAX4601EAE+?

Yes - MAX4601CAE+ and MAX4601EAE+ share identical 16-pin SSOP package dimensions, pinout, and electrical functionality. The only difference is temperature grade: CAE+ is rated for 0°C to +70°C, while EAE+ extends to –40°C to +85°C. Both meet the same R_ON, leakage, and timing specifications within their respective temperature ranges, allowing direct substitution in commercial applications where extended temperature is not required.