Analog Devices Inc./Maxim Integrated MAX4623ESE

Overview

MAX4623ESE from Maxim Integrated is a precision dual SPST analog switch with normally open (NO) configuration, designed for rail-to-rail signal routing in ±4.5V to ±18V or +4.5V to +36V supply systems. It delivers 5Ω max on-resistance, 0.5Ω max channel-to-channel R_ON match, <5nA off-leakage at +85°C, and sub-250ns turn-on time - enabling high-fidelity signal switching in test equipment and communication systems.

For engineers reviewing the MAX4623ESE datasheet, MAX4623ESE pinout, MAX4623ESE application, or MAX4623ESE equivalent, this device is selected for low-distortion analog path control where tight R_ON matching, minimal charge injection (45pC), and guaranteed break-before-make timing (in related MAX4622) are critical to system accuracy and channel crosstalk performance.

Technical Context

The MAX4623ESE implements two independent SPST switches with CMOS/TTL-compatible digital inputs (IN1, IN2) controlling NO1/COM1 and NO2/COM2 paths. Each switch features internal protection diodes and operates across full supply rails (V+ to V−), supporting analog signals from −18V to +18V (bipolar) or 0V to +36V (single-supply).

Its architecture guarantees monotonic on-resistance flatness (∆R_ON ≤ 5Ω over full signal range) and matched conduction characteristics - critical for multiplexer-based data acquisition and audio routing where gain error and THD must remain stable across input voltage swing.

Key Specifications

Pinout & Package

MAX4623ESE is housed in a 16-pin narrow SOIC (SO/DIP) package with 1.27mm pitch, footprint compatible with industry-standard 16-pin SOIC layouts. Thermal resistance θ_JA = 115°C/W (SOIC).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX4623CSE, the MAX4623ESE adds extended temperature capability without trade-offs in R_ON, leakage, or speed; versus ADG465BRMZ, it provides true dual-channel independence and superior noise immunity via dedicated VL, justifying its use in high-reliability multiplexed systems.

Availability

MAX4623ESE is available at Aetrix Electronics and suitable for test equipment signal routing, avionics sensor multiplexing, and communications PBX line interface requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX4623ESE 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 U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.

The MAX462x family was engineered for precision analog signal routing in mission-critical systems where R_ON matching, leakage stability, and rail-to-rail operation directly impact measurement fidelity and system reliability.

FAQ

What is the maximum allowable supply voltage difference for MAX4623ESE?

The absolute maximum rating specifies that the voltage difference between V+ and V− must not exceed +44V. This limit ensures safe operation under transient conditions and prevents junction breakdown in the internal MOSFET structures. Exceeding this value risks permanent damage to the MAX4623ESE, regardless of individual rail voltages. Always verify V+ − V− ≤ 44V in both steady-state and fault scenarios.

Does MAX4623ESE require a separate logic supply (VL) in single-supply operation?

Yes, the MAX4623ESE requires VL = +5V even in single-supply configurations (e.g., V+ = +12V, V− = GND). The VL pin powers the internal logic interface and must be decoupled with a 0.1µF capacitor. Omitting VL will result in undefined switching behavior and potential latch-up, as confirmed in the Pin Description section of the datasheet.

Can MAX4623ESE switch signals beyond the V+ and V− rails?

No. The MAX4623ESE does not support overvoltage operation: analog signals applied to COM or NO pins must remain strictly within the V− to V+ range. Internal ESD diodes clamp excursions beyond these rails, and sustained overvoltage causes irreversible current flow and device failure. External protection circuitry is mandatory if signal transients may exceed rails.

Is MAX4623ESE pin-compatible with the DG405 analog switch?

Yes - the MAX4623ESE is explicitly specified as a pin-compatible replacement for the DG405 in DPST configuration. Both share identical 16-pin SOIC pinout, terminal functions, and logic polarity. However, the MAX4623ESE improves on DG405 with lower R_ON (5Ω vs. 35Ω), tighter matching (0.5Ω vs. 5Ω), and reduced leakage (<5nA vs. 100nA at +85°C).

What is the guaranteed on-resistance flatness specification for MAX4623ESE?

The MAX4623ESE guarantees on-resistance flatness of ∆R_ON ≤ 5Ω maximum over the full analog signal range (V− to V+), defined as the difference between peak and minimum R_ON values measured across the rated voltage span. This flatness ensures consistent gain and minimal THD in audio and instrumentation applications where signal amplitude varies widely.