Analog Devices Inc./Maxim Integrated MAX4611CUD

Overview

MAX4611CUD from Maxim Integrated is a quad, low-voltage, single-pole/single-throw (SPST) CMOS analog switch with normally closed (NC) configuration, 100Ω max on-resistance at +5V supply, 4Ω max channel-to-channel on-resistance match, and rail-to-rail analog signal handling (GND to V+). It operates from a single +2V to +12V supply and supports TTL/CMOS logic compatibility in battery-powered audio routing applications.

For engineers reviewing the MAX4611CUD datasheet, MAX4611CUD pinout, MAX4611CUD application, or MAX4611CUD equivalent, key selection criteria include guaranteed on-resistance flatness (18Ω max), sub-2nA off-leakage at +85°C, 300MHz on-channel bandwidth, ESD robustness (>2kV per Method 3015.7), and TSSOP-14 package compatibility with space-constrained portable designs.

Technical Context

The MAX4611CUD implements four independent NC analog switches controlled by active-low digital inputs (IN1–IN4), where logic LOW enables conduction between COMx and NCx terminals. Its CMOS transmission-gate architecture ensures symmetrical bidirectional signal flow and rail-to-rail voltage handling without polarity constraints.

On-resistance is tightly matched (≤4Ω max difference between channels) and exhibits minimal variation (≤18Ω max flatness) across the full analog signal range (GND to V+), enabling precision multiplexing in low-distortion data-acquisition paths. Leakage currents are specified at ≤2nA (off-state) and ≤0.2nA (on-state) over temperature, supporting high-impedance sample-and-hold hold modes.

Key Specifications

Pinout & Package

MAX4611CUD is housed in a 14-pin TSSOP (Thin Shrink Small Outline Package) with 0.65mm lead pitch, RoHS-compliant, lead-free finish, and thermal pad not exposed (non-EP variant).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX4612CUD+, MAX4611CUD offers dedicated NC-only topology simplifying control logic in mute/isolation use cases; versus ADG1412BRUZ, it trades lower on-resistance for smaller footprint, lower cost, and guaranteed 2nA leakage at +85°C - making it optimal for battery life–critical portable systems.

Availability

MAX4611CUD is available at Aetrix Electronics and suitable for battery-operated equipment, low-voltage data-acquisition systems, and audio/video signal routing requiring stable component supply and long-term manufacturability.

Supply support for MAX4611CUD 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 consumer applications.

The MAX461x family was designed specifically for low-voltage, low-leakage, rail-to-rail analog switching in portable and precision measurement systems - emphasizing parametric consistency, thermal stability, and ease of integration in single-supply architectures.

FAQ

What is the maximum supply voltage rating for MAX4611CUD?

The absolute maximum supply voltage (V+) for MAX4611CUD is +13V referenced to GND. Operation above +12V is possible but requires strict adherence to layout guidelines: a 0.1µF ceramic bypass capacitor must be placed within 2mm of the V+ pin, and transient spikes must be limited to ≤13.0V differential to avoid substrate damage. The recommended operating range remains +2V to +12V.

Does MAX4611CUD support bidirectional analog signal flow?

Yes, MAX4611CUD supports fully bidirectional analog signal flow between COMx and NCx terminals. Its CMOS transmission-gate structure imposes no polarity restrictions, allowing signals to pass equally well from COM to NC or NC to COM. This enables flexible routing in audio line-level interfaces and sensor excitation circuits where signal direction may vary dynamically.

How does the on-resistance of MAX4611CUD vary with supply voltage?

MAX4611CUD on-resistance decreases as supply voltage increases: 100Ω max at +5V, 46Ω max at +12V, and 360Ω max at +3V. This inverse relationship is inherent to CMOS switch design and is documented in the datasheet's electrical characteristics tables. Designers must account for this variation when calculating worst-case voltage drop in low-voltage battery applications.

Can MAX4611CUD be used with a 3.3V logic controller?

Yes, MAX4611CUD can be driven directly by a 3.3V logic controller when operated from a +5V or higher supply. Its input thresholds are fixed at V_{IN_H} = 2.4V and V_{IN_L} = 0.8V, so a 3.3V GPIO HIGH meets the 2.4V minimum requirement. However, at +3.3V supply, input thresholds shift to V_{IN_H} = 1.0V and V_{IN_L} = 0.5V - verify controller output levels match these reduced thresholds.

What is the thermal performance of MAX4611CUD in TSSOP-14 package?

The MAX4611CUD in 14-pin TSSOP has a thermal resistance θ_JA of 125°C/W. At maximum rated power dissipation (500mW at +70°C ambient), junction temperature rise is 62.5°C - resulting in a worst-case junction temperature of +132.5°C. For continuous operation, keep ambient temperature below +70°C and ensure adequate PCB copper area under the package to maintain reliability.