Analog Devices Inc./Maxim Integrated MAX4668CSE

Overview

MAX4668CSE from Maxim Integrated is a dual SPST normally open (NO) CMOS analog switch with 2.5Ω max 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), and 5nA max off-leakage at +85°C - ideal for precision test equipment signal routing where mechanical relay replacement is required.

For engineers reviewing the MAX4668CSE datasheet, MAX4668CSE pinout, MAX4668CSE application, or MAX4668CSE equivalent, key selection criteria include guaranteed NO configuration, dual- or single-supply flexibility, TTL/CMOS-compatible logic thresholds (+0.8V/+2.4V), low charge injection (450pC), and SOIC-16 packaging for high-density PCB layouts.

Technical Context

The MAX4668CSE implements two independent, non-latching SPST switches with active-high control logic (IN1/IN2 drive NO1/NO2 closed when high). Its CMOS architecture uses complementary P/N-channel transistor pairs per switch path to enable rail-to-rail analog conduction across the full supply range without signal clipping.

It features guaranteed break-before-make timing only in the MAX4669 variant - the MAX4668CSE has no inter-channel timing coordination. All digital inputs are referenced to VL and tolerate TTL/CMOS levels regardless of analog supply voltage, enabling mixed-voltage system interfacing.

Key Specifications

Pinout & Package

MAX4668CSE is housed in a 16-pin narrow SOIC (SOICN) package with 1.27mm pitch, JEDEC MS-012AC compliant, and rated for 0°C to +70°C operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADG1419BRUZ and TS5A23157DGSR, the MAX4668CSE uniquely supports true dual-supply operation with rail-to-rail analog swing, making it irreplaceable in ±15V test instrumentation and avionics signal chains where supply flexibility and signal integrity are non-negotiable.

Availability

MAX4668CSE is available at Aetrix Electronics and suitable for automated test equipment, PBX systems, and avionics signal conditioning requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for MAX4668CSE 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) designs high-performance analog, mixed-signal, and RF ICs for industrial, communications, and automotive markets.

The MAX4667/MAX4668/MAX4669 family targets high-fidelity analog switching in test, telecom, and aerospace systems where mechanical relay limitations - wear, speed, size, and power - demand robust solid-state alternatives.

FAQ

What is the maximum analog signal voltage range supported by the MAX4668CSE?

The MAX4668CSE supports rail-to-rail analog signals from V− to V+, enabling continuous conduction across the full supply range. With ±15V dual supplies, it handles ±15V signals; with +12V single supply and V− tied to GND, it supports 0V to +12V. Absolute maximum ratings allow V+ to V− differentials up to 44V, but signal swing is bounded by the actual supply voltages applied to V+ and V− pins.

Does the MAX4668CSE provide break-before-make switching between its two channels?

No, the MAX4668CSE does not guarantee break-before-make operation. That feature is exclusive to the MAX4669 variant, which integrates timing control to ensure one switch opens before the other closes. The MAX4668CSE contains two independent SPST NO switches with no inter-channel timing coordination - simultaneous switching is possible and must be managed externally if sequencing is required.

Can the MAX4668CSE operate from a single +5V supply?

Yes, the MAX4668CSE can operate from a single +5V supply: connect V+ to +5V, V− to GND, and VL to +5V. However, on-resistance increases to 4Ω max (vs. 2.5Ω at ±15V), and signal range is limited to 0V–+5V. Logic thresholds remain compatible, but ensure input signals stay within 0V to +5V to avoid clamping diode conduction.

What is the purpose of the VL pin on the MAX4668CSE?

The VL pin provides a dedicated logic supply reference for the digital input comparators, ensuring stable +0.8V/+2.4V thresholds regardless of analog supply voltage fluctuations. It must be decoupled with a 0.1µF capacitor to GND and typically tied to +5V. Using VL instead of deriving logic thresholds from V+ or V− improves noise immunity and guarantees TTL/CMOS compatibility across all supply configurations.

How is the MAX4668CSE protected against electrostatic discharge?

The MAX4668CSE incorporates on-chip ESD protection structures rated to >2kV per Human Body Model (HBM) Method 3015.7. This protection covers all pins including COM, NO, IN, V+, V−, VL, and GND. No external protection components are required for standard handling, though proper ESD-safe practices during PCB assembly and field service remain essential for long-term reliability.