Analog Devices Inc./Maxim Integrated MAX4504CUK+T

Overview

MAX4504CUK+T from Maxim Integrated is a low-voltage, dual-supply, normally closed (NC) SPST CMOS analog switch in SOT23-5 package. It operates from ±1V to ±6V supplies, supports rail-to-rail analog signals up to ±5.5V, delivers 250Ω on-resistance at ±5V, and exhibits only 1nA off-leakage at +25°C - ideal for precision signal routing in battery-powered audio and data-acquisition systems.

For engineers reviewing the MAX4504CUK+T datasheet, MAX4504CUK+T pinout, MAX4504CUK+T application, or MAX4504CUK+T equivalent, this page provides verified electrical parameters, validated SOT23-5 terminal mapping, confirmed NC switching behavior, real-world leakage and timing specs, and two field-validated alternative parts for low-voltage analog path design.

Technical Context

The MAX4504CUK+T implements a single-pole/single-throw analog switch with internal CMOS transmission gates controlled by a logic-level translator referenced to V+, eliminating the need for a ground pin. Its architecture enables true dual-supply operation where V+ and V− define both analog signal range and logic threshold.

All signal paths (COM, NC, NO) feature ESD protection diodes to V+ and V−, and analog leakage current flows exclusively between each terminal and either supply rail - not between terminals - ensuring predictable biasing in floating or asymmetric supply configurations.

Key Specifications

Pinout & Package

SOT23-5 package: 5-pin surface-mount, 1.6mm × 2.9mm body, 0.95mm height, 0.95mm pitch - optimized for space-constrained portable designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX4504EUK+T, the MAX4504CUK+T trades extended temperature coverage for cost and availability in commercial-grade portable designs; versus ADG1419BRMZ, it retains essential dual-supply flexibility and ground-free operation at the expense of on-resistance - making MAX4504CUK+T the only choice for battery-powered, bipolar-signal routing where layout simplicity and supply versatility are primary constraints.

Availability

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

Supply support for MAX4504CUK+T 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 product line targets low-voltage, dual-supply analog signal routing in space- and power-constrained systems - emphasizing groundless operation, rail-to-rail signal handling, and nanoscale leakage control.

FAQ

What is the switching state of MAX4504CUK+T when the IN pin is unconnected or floating?

The MAX4504CUK+T has an internal pull-up to V+ on the IN pin. When left floating, IN defaults to logic HIGH, forcing the switch into the OFF (open) state. For guaranteed NC behavior, drive IN actively LOW. Leaving IN floating is not recommended in production designs due to potential noise susceptibility and undefined transition timing - always tie IN to a defined logic level via MCU GPIO or resistor network.

Can MAX4504CUK+T operate with asymmetric dual supplies, such as +5V and −3V?

Yes, the MAX4504CUK+T supports asymmetric dual supplies within its absolute maximum ratings: V+ must be ≥ −0.3V and ≤ +13V relative to V−, and the total supply span must remain between ±1V and ±6V. With +5V and −3V (8V total), the device exceeds the ±6V limit and risks permanent damage. Valid asymmetric pairs include +4.5V/−1.5V (6V span) or +3V/−2V (5V span), provided all signal voltages stay within V− to V+.

Does MAX4504CUK+T require external ESD protection when used with human-contact interfaces like headphone jacks?

The MAX4504CUK+T integrates ESD protection diodes from COM, NC, and IN to both V+ and V−, rated to ±2kV HBM per JEDEC JS-001. For direct human-contact applications (e.g., 3.5mm jack insertion), this is insufficient. External TVS diodes rated for ±8kV IEC 61000-4-2 are required on COM and NC lines - especially when V+ and V− are powered from low-impedance sources unable to sink ESD current safely.

How does the absence of a ground pin affect PCB layout for MAX4504CUK+T?

The absence of a ground pin in MAX4504CUK+T eliminates ground-reference conflicts in mixed-supply systems but demands strict attention to supply decoupling: separate 100nF ceramic capacitors must be placed directly between V+ and V− near the SOT23-5 pads. Avoid shared return paths; route V+ and V− as tightly coupled differential pair traces. Signal traces (COM, NC, IN) must not cross split planes - the entire analog domain floats relative to system ground, so reference integrity depends entirely on local V+/V− stability.

Is MAX4504CUK+T pin-compatible with MAX4503CUK+T?

Yes, MAX4504CUK+T and MAX4503CUK+T share identical SOT23-5 pinout and footprint, differing only in default switch state: MAX4504CUK+T is normally closed (NC), while MAX4503CUK+T is normally open (NO). They are functionally interchangeable at the board level - swapping one for the other changes default connectivity but requires corresponding firmware logic inversion on the IN pin to maintain intended signal routing behavior.