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, and <200ns turn-off time, enabling low-distortion switching in test equipment and communication systems.

For engineers reviewing the MAX4623ESE+ datasheet, MAX4623ESE+ pinout, MAX4623ESE+ application, or MAX4623ESE+ equivalent, key selection criteria include guaranteed break-before-make timing (in related MAX4622), leakage performance at +85°C (<5nA), single/dual-supply flexibility, and compatibility with DG405-based layouts.

Technical Context

The MAX4623ESE+ implements two independent SPST switches with CMOS/TTL-compatible digital control inputs (IN1, IN2) and separate logic supply (VL) for level-shifting. Its internal architecture ensures matched R_ON across channels and flat on-resistance (±0.5Ω) over full analog signal range (V− to V+).

It supports rail-to-rail analog signal handling without degradation, maintains sub-500pA off-leakage at +25°C, and achieves fast switching via optimized charge-injection control (475pC typical). No internal NC terminals are connected - all NC pins are not internally connected per pin description.

Key Specifications

Pinout & Package

MAX4623ESE+ is housed in a 16-pin narrow SOIC (SO/DIP) package with 1.27mm pitch, rated for −40°C to +85°C operation. Pin 14 is GND; Pins 1, 3, 6, 8 connect to V−; Pins 2 and 7 are COM1 and COM2; Pins 4, 5, 9, 16 are NO1–NO4; Pins 10 and 15 are IN1 and IN2; Pin 12 is V+; Pin 13 is VL; Pins 11 and others marked N.C. are not internally connected.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX4623CSE+, the MAX4623ESE+ provides extended temperature capability essential for field-deployed equipment; compared with ADG408BRUZ, it offers lower R_ON, true dual SPST topology, and bipolar supply support - making it superior for precision relay-replacement in military radios and test gear.

Availability

MAX4623ESE+ is available at Aetrix Electronics and suitable for test equipment, avionics, and telecom infrastructure 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) designs high-performance analog and mixed-signal ICs for precision, reliability, and integration in demanding environments.

The MAX462x family targets high-fidelity analog signal routing where mechanical relay replacement, low distortion, and supply flexibility are critical - especially in automatic test equipment and ruggedized communications hardware.

FAQ

What is the maximum allowable voltage difference between V+ and V− for MAX4623ESE+?

The absolute maximum rating specifies that the voltage difference between V+ and V− must not exceed +44V. This limit ensures safe operation of internal protection diodes and prevents permanent damage. Exceeding this value risks latch-up or junction breakdown, even if individual supply rails remain within their respective ±4.5V to ±18V ranges. Always verify net voltage differential during power-up sequencing and transient conditions in the MAX4623ESE+ design.

Does MAX4623ESE+ require external pull-up resistors on its IN1 and IN2 control inputs?

No, MAX4623ESE+ does not require external pull-up resistors on IN1 or IN2. Its TTL/CMOS-compatible inputs have guaranteed logic thresholds (V_INL ≤ 0.8V, V_INH ≥ 2.4V) and low input current (±0.5µA max), allowing direct connection to microcontroller GPIO or FPGA outputs. Internal input structure eliminates need for external biasing - simplifying layout and reducing BOM count in MAX4623ESE+ implementations.

Can MAX4623ESE+ operate with V+ = +12V and V− = GND (single-supply mode)?

Yes, MAX4623ESE+ supports true single-supply operation with V+ = +12V and V− = GND. In this configuration, the analog signal range extends from 0V to +12V, and the device maintains 5Ω max on-resistance and <5nA off-leakage at +85°C. The VL pin must still be supplied (typically +5V) for logic compatibility. This mode is validated in the MAX4623ESE+ electrical characteristics table under "Single Supply" conditions.

What is the purpose of the VL pin on MAX4623ESE+, and can it be tied to V+?

The VL pin sets the logic input threshold voltage and may be driven independently from V+ to enable level translation. While VL can be tied to V+ (if V+ ≤ 5.5V), doing so restricts logic compatibility to CMOS-only sources. For robust interfacing with 3.3V or 5V TTL/CMOS drivers - especially when V+ exceeds 5.5V - VL should be supplied separately at +5V. This ensures correct recognition of logic levels without overstressing the MAX4623ESE+ input stage.

Are the NC pins on MAX4623ESE+ safe to leave floating, or must they be grounded?

The NC pins (pins 11 and others marked "N.C." in the MAX4623ESE+ pin description) are not internally connected and pose no electrical risk when left floating. Grounding them is unnecessary and may introduce unintended parasitic capacitance or noise coupling. Per Maxim's official pin description, these terminals require no routing, soldering, or thermal treatment - leaving them unconnected is the correct implementation for MAX4623ESE+.