Analog Devices Inc./Maxim Integrated MAX4661CPE

Overview

MAX4661CPE from Maxim Integrated is a quad, single-pole single-throw (SPST), normally closed (NC) analog switch IC operating from +4.5V to +36V single supply or ±4.5V to ±20V dual supplies. It delivers 2.5Ω max on-resistance, 0.5Ω max on-resistance match between channels, and rail-to-rail analog signal handling up to ±10V. It is used in reed relay replacement, test equipment, and data acquisition systems where low distortion and high reliability are required.

For engineers reviewing the MAX4661CPE datasheet, MAX4661CPE pinout, MAX4661CPE application, or MAX4661CPE equivalent, key selection criteria include guaranteed NC configuration, 0.5Ω R_ON matching, break-before-make absence (distinguishing it from MAX4663), -40°C to +85°C industrial-grade variants, and 16-pin plastic DIP package compatibility with through-hole prototyping and legacy ATE designs.

Technical Context

The MAX4661CPE implements four independent CMOS SPST switches with normally closed topology - each COM terminal connects to its NC terminal when the corresponding IN logic input is low (≤0.8V). Its architecture uses matched P- and N-channel MOSFETs to achieve flat on-resistance (<0.5Ω variation) across the full ±10V analog signal range and low charge injection (20pC typical).

It features a dedicated VL pin enabling TTL/CMOS-compatible control inputs across the entire analog supply range (+4.5V to +36V or ±4.5V to ±20V), while internal ESD protection exceeds 2kV per Method 3015.7. Unlike the MAX4663, it provides no break-before-make timing guarantee - all switches operate independently with no inter-channel synchronization.

Key Specifications

Pinout & Package

MAX4661CPE is housed in a 16-pin plastic DIP (dual in-line package) with 0.3-inch body width and standard through-hole footprint compatible with MIL-STD-883 and JEDEC MS-001AC. Pin spacing is 0.1 inch, and the package is RoHS-compliant and lead-free per Maxim's 2004 transition.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX4661CPE, MAX4661EPE offers identical performance with extended thermal qualification, while ADG441BNZ trades on-resistance and matching precision for lower supply voltage support and different package geometry - making MAX4661CPE optimal for high-accuracy, wide-supply industrial signal routing.

Availability

MAX4661CPE is available at Aetrix Electronics and suitable for reed relay replacement, automated test equipment, and data acquisition systems requiring stable component supply across long production lifecycles and legacy through-hole manufacturing flows.

Supply support for MAX4661CPE 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 fabless semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and computing markets.

The MAX4661 series belongs to Maxim's precision analog switch product line, designed specifically for high-reliability signal routing in automatic test equipment, avionics, and instrumentation where low on-resistance, tight matching, and rail-to-rail operation are mandatory.

FAQ

What is the maximum analog signal voltage range supported by the MAX4661CPE?

The MAX4661CPE supports rail-to-rail analog signals from V− to V+, with absolute maximum ratings of −44V to +44V across supply pins. In standard operation, it handles ±10V signals with guaranteed 0.5Ω R_ON flatness. For single-supply use, V− is tied to GND and signals swing from 0V to V+ (up to +36V), while dual-supply mode supports symmetric ±20V operation. The MAX4661CPE datasheet specifies these ranges under both DC and dynamic conditions.

Does the MAX4661CPE support break-before-make switching?

No, the MAX4661CPE does not feature guaranteed break-before-make (BBM) switching. It is a quad SPST normally closed device with fully independent channels - each switch transitions based solely on its own INx input, with no timing coordination between channels. BBM is exclusive to the MAX4663 variant; using MAX4661CPE in applications requiring BBM (e.g., power domain isolation) risks momentary short-circuits and requires external timing control.

Can the MAX4661CPE operate with a 3.3V logic supply while using a +24V analog supply?

Yes, the MAX4661CPE supports this configuration via its dedicated VL pin. Connect VL to +3.3V while powering V+ at +24V and V− at GND (single supply) or −12V (dual supply). The logic inputs (IN1–IN4) will correctly interpret 0.8V/2.4V TTL thresholds referenced to VL, independent of analog rail voltage - enabling seamless interfacing with modern 3.3V microcontrollers in high-voltage industrial systems.

What is the thermal performance of the MAX4661CPE in plastic DIP package?

The MAX4661CPE in 16-pin plastic DIP has a thermal resistance θ_JA of 10.53°C/W, allowing 842mW maximum continuous power dissipation at +70°C ambient. Derating is linear above that temperature (−10.53mW/°C). At full 200mA per channel and 2.5Ω R_ON, worst-case power per switch is 100mW - well within safe limits. The package is rated for storage from −65°C to +150°C and soldering at +300°C for 10 seconds.

How does the MAX4661CPE compare to mechanical relays in terms of reliability and lifetime?

The MAX4661CPE eliminates moving parts, offering >1 billion operational cycles versus ~1 million for typical reed relays. It exhibits no contact wear, bounce, or oxidation-related resistance drift. With 5nA max off-leakage at +85°C and 2kV HBM ESD rating, it sustains performance in harsh environments where relays degrade. Unlike relays, MAX4661CPE supports sub-100ns switching and consumes negligible hold current - reducing system power and heat generation significantly.