Analog Devices Inc./Maxim Integrated MAX4668EPE+

Overview

MAX4668EPE+ from Maxim Integrated is a dual, normally open (NO), single-pole single-throw (SPST) CMOS analog switch with 2.5Ω maximum on-resistance, ±4.5V to ±20V dual-supply or +4.5V to +36V single-supply operation, and rail-to-rail signal handling up to ±20V. It delivers matched on-resistance (≤0.4Ω), flat on-resistance (≤0.5Ω) over full signal range, and 5nA max off-leakage at +85°C - ideal for precision reed-relay replacement in automated test equipment.

For engineers reviewing the MAX4668EPE+ datasheet, MAX4668EPE+ pinout, MAX4668EPE+ application, or MAX4668EPE+ equivalent, key selection criteria include guaranteed break-before-make timing (not applicable to MAX4668), TTL/CMOS-compatible logic thresholds (+0.8V/+2.4V), and dual-supply flexibility enabling use in industrial signal routing, avionics power sequencing, and audio-switching systems requiring low distortion and high reliability.

Technical Context

The MAX4668EPE+ implements two independent NO SPST switches using high-voltage CMOS process technology, supporting true rail-to-rail analog signal switching across its full ±20V dual-supply or 0V–+36V single-supply range. Its control architecture uses non-inverting logic inputs referenced to VL, with guaranteed TTL/CMOS compatibility at ±15V or +12V supplies.

Each channel features matched R_ON (≤0.4Ω), flat R_ON (≤0.5Ω), and low charge injection (450pC typical), ensuring minimal signal disturbance during switching. Off-isolation exceeds –60dB and crosstalk remains below –66dB at 1MHz, making it suitable for high-fidelity multiplexing where channel separation is critical.

Key Specifications

Pinout & Package

MAX4668EPE+ is housed in a 16-pin plastic DIP (dual in-line package) with 0.3-inch body width and through-hole mounting. Pin 1 is located at the left end of the top row when viewed from the top with notch or dot oriented upward.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADG1419BRUZ and TS5A23157DRCR, MAX4668EPE+ uniquely supports both wide-range dual-supply (±20V) and high-voltage single-supply (up to +36V) operation while maintaining guaranteed R_ON matching and flatness - making it the only option qualified for ATE and avionics signal routing where supply flexibility and channel consistency are jointly required.

Availability

MAX4668EPE+ is available at Aetrix Electronics and suitable for automated test equipment, avionics subsystems, and professional audio routing systems requiring stable component supply across extended temperature and voltage ranges.

Supply support for MAX4668EPE+ 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 automotive markets.

The MAX4667/MAX4668/MAX4669 family was designed specifically for high-reliability analog signal routing in environments where mechanical relay limitations-such as wear, bounce, and slow switching-must be eliminated without sacrificing voltage range or precision.

FAQ

What is the maximum allowable supply voltage for MAX4668EPE+?

The MAX4668EPE+ supports absolute maximum ratings of V+ to GND = –0.3V to +44V and V– to GND = +0.3V to –44V. For reliable operation, use within the specified supply ranges: +4.5V to +36V single supply or ±4.5V to ±20V dual supply. Exceeding ±20V on V+/V– may cause permanent damage even if within absolute max limits.

Does MAX4668EPE+ support break-before-make switching?

No, MAX4668EPE+ does not support break-before-make operation. It is a dual normally open (NO) switch with independent control inputs. Break-before-make is only guaranteed for the MAX4669 variant, which integrates one NO and one NC switch with internal timing control. Using MAX4668EPE+ in break-before-make configurations requires external logic sequencing.

Can MAX4668EPE+ operate with a single +5V supply?

No, MAX4668EPE+ requires minimum +4.5V for single-supply operation, but its performance degrades significantly below +12V. At +5V, R_ON increases beyond 4Ω (per datasheet Table "ELECTRICAL CHARACTERISTICS-Single Supply"), and rail-to-rail capability is lost. For +5V systems, consider lower-voltage alternatives like TS5A23157 or ADG1219.

What is the thermal performance of MAX4668EPE+ in plastic DIP package?

In its 16-pin plastic DIP package, MAX4668EPE+ has a thermal resistance θ_JA of 95°C/W and a maximum continuous power dissipation of 842mW at +70°C ambient. Derating is 10.53mW/°C above +70°C. At full ±15V dual supply and 100mA per channel, junction temperature rise remains within safe limits up to +85°C ambient under typical PCB layout conditions.

How is logic compatibility achieved across different supply configurations in MAX4668EPE+?

MAX4668EPE+ achieves TTL/CMOS compatibility via dedicated VL pin and fixed +0.8V/+2.4V logic thresholds referenced to GND - independent of V+ or V– levels. This allows direct interface with +5V microcontrollers even when operating from ±15V analog supplies, eliminating level-shifters and simplifying mixed-voltage system design.