Analog Devices Inc./Maxim Integrated MAX4612CUD

Overview

MAX4612CUD from Maxim Integrated is a quad, low-voltage, SPST CMOS analog switch with two normally open (NO) and two normally closed (NC) channels. It operates from a single +2V to +12V supply, delivers ≤100Ω on-resistance at +5V, matches channels within 4Ω max, and handles rail-to-rail analog signals (GND to V+). It is used in battery-powered audio routing and low-voltage data-acquisition front-ends.

For engineers reviewing the MAX4612CUD datasheet, MAX4612CUD pinout, MAX4612CUD application, or MAX4612CUD equivalent, key selection criteria include its dual NO/NC topology, guaranteed on-resistance flatness (≤18Ω), sub-2nA off-leakage at +85°C, TTL/CMOS logic compatibility, and TSSOP-14 packaging for space-constrained mixed-signal PCBs.

Technical Context

The MAX4612CUD implements four independent SPST switches in a single monolithic CMOS die, with dedicated NO and NC terminals per channel-unlike fully configurable analog multiplexers. Its control logic uses standard +0.8V/+2.4V thresholds, enabling direct interface with +5V TTL/CMOS microcontrollers without level-shifting.

Each switch supports bidirectional analog signal flow across the full supply range (GND to V+), with on-resistance variation tightly controlled (≤18Ω flatness over signal range) and channel-to-channel matching (≤4Ω ΔRON) verified across temperature. ESD protection exceeds 2kV per Method 3015.7, and leakage remains below 2nA at +85°C.

Key Specifications

Pinout & Package

MAX4612CUD is housed in a 14-pin TSSOP package (4.4mm body width, JEDEC MO-153 compliant) with exposed pad connected to V+. Pin 1 is located at the top-left corner adjacent to the index mark.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX4611CUD (NC-only) and ADG1412BRUZ (lower R_ON, different footprint), MAX4612CUD uniquely balances mixed NO/NC flexibility, TSSOP-14 compatibility, and optimized leakage/resistance trade-offs for +2V to +12V portable systems.

Availability

MAX4612CUD is available at Aetrix Electronics and suitable for battery-operated equipment, low-voltage data-acquisition systems, and audio signal routing requiring stable component supply across commercial temperature range (0°C to +70°C).

Supply support for MAX4612CUD 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 precision analog, mixed-signal, and high-reliability semiconductor solutions for industrial, medical, and communications markets.

The MAX461x family targets low-voltage, low-leakage analog switching in space- and power-constrained systems - emphasizing rail-to-rail performance, guaranteed matching, and robust ESD tolerance for portable and embedded applications.

FAQ

What is the maximum supply voltage for MAX4612CUD, and what happens if exceeded?

The absolute maximum V+ rating for MAX4612CUD is +13V. Exceeding this voltage risks permanent damage due to gate oxide breakdown or junction failure. At +12V operation, a minimum 0.1µF ceramic bypass capacitor must be placed directly at the V+ pin to suppress transients. The MAX4612CUD datasheet specifies that even ±5% tolerance supplies may generate overshoot spikes above 13.0V, so design margins and transient suppression are essential for reliability.

Does MAX4612CUD support bidirectional analog signal flow?

Yes, MAX4612CUD supports fully bidirectional analog signal flow on all COM–NO and COM–NC paths. Each switch conducts equally well in either direction because it uses symmetrical CMOS transmission-gate architecture. This allows use in AC-coupled audio paths, differential sensor interfaces, or any application where signal polarity or direction is not fixed - a key advantage over mechanical relays or unidirectional FET switches.

How does the dual NO/NC configuration of MAX4612CUD differ from MAX4610CUD and MAX4611CUD?

MAX4612CUD integrates two NO and two NC switches in one 14-pin TSSOP package. In contrast, MAX4610CUD contains four NO-only switches, while MAX4611CUD contains four NC-only switches. This makes MAX4612CUD uniquely suited for applications requiring both fail-open and fail-closed behavior - such as redundant signal paths, power-fail safe routing, or hybrid analog multiplexing - without needing multiple ICs or external logic.

What is the typical on-resistance flatness of MAX4612CUD, and why does it matter?

The guaranteed on-resistance flatness of MAX4612CUD is ≤18Ω over the full analog signal range (GND to V+). This means R_ON varies by no more than 18Ω as the signal voltage sweeps across the rail - critical for minimizing harmonic distortion and gain nonlinearity in audio, instrumentation, and precision measurement circuits. Flatness directly impacts THD+N performance; the MAX4612CUD achieves 0.009% THD+N at 2V_P-P with +5V supply.

Can MAX4612CUD operate from a +3V supply, and how does performance change?

Yes, MAX4612CUD operates down to +2V, including +3V nominal supplies. At +3V, on-resistance increases to 360Ω (max), on-resistance match degrades to 5Ω (max), and turn-on time extends to 140ns (max). However, logic thresholds remain compatible (+0.5V low / +2.4V high), and rail-to-rail signal handling is preserved. This makes MAX4612CUD viable for ultra-low-power systems where higher R_ON is acceptable - e.g., sensor wake-up gating or infrequent signal routing.