Analog Devices Inc./Maxim Integrated MAX4504CUK

Overview

MAX4504CUK from Maxim Integrated is a low-voltage, dual-supply, single-pole/single-throw (SPST) CMOS analog switch with normally closed (NC) configuration. It operates from ±1V to ±6V supplies, delivers rail-to-rail analog signal switching, guarantees 250Ω on-resistance at ±5V, and exhibits only 1nA off-leakage current at +25°C - ideal for precision signal routing in battery-powered audio and data-acquisition systems.

For engineers reviewing the MAX4504CUK datasheet, MAX4504CUK pinout, MAX4504CUK application, or MAX4504CUK equivalent, key selection criteria include its NC default state, SOT23-5 package footprint, ±1V to ±6V dual-supply flexibility, guaranteed charge injection ≤10pC, and compatibility with CMOS logic inputs without ground reference.

Technical Context

The MAX4504CUK implements a fully differential CMOS transmission gate architecture with independent ESD diodes on COM, NO/NC, and IN pins tied to V+ and V−. Its logic-level translator references VIN thresholds internally to V+, enabling CMOS-compatible control across supply voltages without a ground pin.

Signal paths are bidirectional and isolated from supply rails; all analog leakage flows through reverse-biased ESD diodes to V+ or V−, not between terminals. Off-isolation degrades predictably above 10MHz (−65dB at 10MHz in 50Ω), while on-resistance remains stable across −55°C to +125°C when biased at ±5V.

Key Specifications

Pinout & Package

SOT23-5 package: compact 5-pin surface-mount outline with exposed pad option (not electrically connected), 1.3mm × 2.9mm footprint, 1.1mm height, JEDEC MO-178 compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX4504CUK, MAX4504EUK extends thermal reliability without layout or schematic changes, while ADG1419BRMZ trades dual-supply versatility for higher voltage tolerance and lower on-resistance - making it unsuitable for battery-powered ±3V systems where MAX4504CUK excels.

Availability

MAX4504CUK is available at Aetrix Electronics and suitable for battery-operated equipment, audio signal routing, and low-voltage data-acquisition systems requiring stable component supply across commercial temperature ranges.

Supply support for MAX4504CUK 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 power-management ICs for demanding industrial, communications, and consumer applications.

The MAX4503/MAX4504 family targets low-voltage, dual-supply analog signal routing where groundless operation, rail-to-rail swing, and nanoscale leakage are essential - especially in portable and space-constrained systems.

FAQ

What is the default switch state of the MAX4504CUK?

The MAX4504CUK is a normally closed (NC) analog switch: COM and NC terminals conduct when the IN pin is logic LOW (≤ V− + 1.5V). When IN is driven HIGH (≥ V+ − 1.5V), the path opens. This default-closed behavior ensures signal continuity during power-up or control failure - a key safety feature in audio and sensor paths where silent or open-circuit defaults are unacceptable. The MAX4504CUK's NC function is intrinsic to its silicon design and cannot be reconfigured.

Can the MAX4504CUK operate from a single supply?

No - the MAX4504CUK requires dual supplies (V+ and V−) to function correctly. Its architecture relies on symmetric or asymmetric bipolar rails (e.g., +3V and −3V, or +5V and −1V) to bias internal transmission gates and ESD diodes. Single-supply operation is unsupported and would violate absolute maximum ratings: applying 0V to V− while V+ = +5V risks forward-biasing internal diodes and causing latch-up or permanent damage. For single-supply designs, use the pin-compatible MAX4502 instead.

What is the maximum analog signal voltage the MAX4504CUK can handle?

The MAX4504CUK supports rail-to-rail analog signals from V− to V+. With ±5V supplies, it passes signals from −5V to +5V without clipping or distortion. The absolute maximum analog voltage at any terminal is clamped to V− − 0.3V and V+ + 0.3V by internal ESD diodes - exceeding these bounds risks forward conduction and damage. Therefore, the usable analog range is strictly bounded by the applied V+ and V−, and must never exceed those rails by more than 0.3V in either direction.

Does the MAX4504CUK require an external ground connection?

No - the MAX4504CUK has no ground pin and operates without an external ground reference. Its digital input thresholds (VINH and VINL) are internally referenced to V+ and V−, and all internal logic is powered from the dual supplies. This enables true floating operation in isolated systems, such as battery-powered medical sensors or differential signal chains where ground loops must be avoided. However, system-level grounding decisions remain critical for noise immunity and ESD robustness - the absence of a GND pin does not eliminate the need for proper PCB grounding practices.

How does charge injection affect performance in precision sampling circuits using the MAX4504CUK?

Charge injection in the MAX4504CUK is specified at ≤10pC maximum - a critical parameter when driving high-impedance nodes like ADC sample capacitors or op-amp integrators. At 10pC and a 10nF hold capacitor, the resulting voltage glitch is 1mV (ΔV = Q/C), directly impacting DC accuracy and settling time. To mitigate this, designers should minimize downstream capacitance, use guard rings, or implement correlated double sampling. The MAX4504CUK's guaranteed 10pC value allows predictable error budgeting in 12-bit to 14-bit data acquisition systems operating at ±5V.