Analog Devices Inc./Maxim Integrated MAX4663EWE+T

Overview

MAX4663EWE+T from Maxim Integrated is a quad SPST analog switch IC with two normally open (NO) and two normally closed (NC) channels, guaranteed break-before-make switching, 2.5Ω max on-resistance, ±4.5V to ±20V dual-supply or +4.5V to +36V single-supply operation, and rail-to-rail signal handling - used in precision ADC multiplexing and reed relay replacement in automated test equipment.

For engineers reviewing the MAX4663EWE+T datasheet, MAX4663EWE+T pinout, MAX4663EWE+T application, or MAX4663EWE+T equivalent, key selection criteria include guaranteed break-before-make timing (5–125 ns), channel-to-channel R_ON match ≤0.5Ω, off-leakage ≤0.5nA at +85°C, and TTL/CMOS-compatible logic inputs with separate VL supply.

Technical Context

The MAX4663EWE+T implements four independent CMOS transmission gates in a single 16-pin Wide SO package, with dedicated IN/COM/NO/NC terminals per switch pair and isolated V+, V−, GND, and VL supplies to decouple analog and digital domains. Its internal architecture ensures monotonic R_ON flatness (≤0.7Ω over ±10V signal range) and matched conduction paths for low crosstalk (−60dB at 1MHz).

Break-before-make timing is hardware-guaranteed via internal delay circuitry between complementary control signals driving NO and NC switches - critical for preventing momentary short-circuits in signal routing applications such as PBX line switching and sample-and-hold multiplexers.

Key Specifications

Pinout & Package

MAX4663EWE+T is housed in a 16-pin Wide SO (SOIC-W) package with 0.3-inch body width and standard 1.27mm pitch. Pin 1 is marked by a beveled corner; thermal pad is not present.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADG465BRUZ and TS5A3157DCUR, the MAX4663EWE+T uniquely supports dual ±20V supplies, guarantees break-before-make, and provides mixed NO/NC topology - making it the only option among the three qualified for reed-relay-replacement in ATE and telecom line interface designs requiring robust fault-free switching.

Availability

MAX4663EWE+T is available at Aetrix Electronics and suitable for automated test equipment, avionics signal routing, and industrial data acquisition systems requiring stable component supply across extended temperature ranges (−40°C to +85°C) and long production lifecycles.

Supply support for MAX4663EWE+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) is a U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and computing markets.

The MAX466x family was designed specifically for high-reliability, low-distortion analog signal routing in environments where mechanical relays fail - emphasizing rail-to-rail operation, guaranteed switching sequence, and robust leakage performance over temperature.

FAQ

What is the maximum allowable voltage difference between V+ and V− for MAX4663EWE+T?

The absolute maximum rating specifies that the voltage difference between V+ and V− must not exceed +44V. This limit applies regardless of whether the device operates in single-supply mode (V− = GND) or dual-supply mode. Exceeding this rating risks permanent damage to internal ESD structures and oxide layers. The MAX4663EWE+T is rated for ±20V dual supplies (40V total), leaving a 4V margin for transient overshoot - a key design consideration in motor-control feedback or industrial bus interfaces where supply rails may experience coupling spikes.

Does MAX4663EWE+T support true rail-to-rail analog signal switching with a +5V single supply?

Yes, the MAX4663EWE+T supports rail-to-rail analog signal switching down to a +5V single supply (V+ = +5V, V− = GND). In this configuration, analog signals from 0V to +5V are passed with minimal distortion and R_ON flatness maintained within 0.7Ω. However, on-resistance increases to ~4Ω max at +85°C under these conditions - verified in the Single-Supply Electrical Characteristics table. This makes the MAX4663EWE+T viable for low-voltage medical sensors and portable instrumentation where headroom is constrained but leakage and matching remain critical.

Can the VL pin of MAX4663EWE+T be tied directly to V+ when using a +12V analog supply?

Yes, the VL pin can be tied directly to V+ (e.g., +12V) when the controlling logic also operates at +12V. The datasheet explicitly permits VL to range from (GND − 0.3V) to (V+ + 0.3V), and logic thresholds scale accordingly: VIN_H ≈ 0.7 × VL and VIN_L ≈ 0.3 × VL. Doing so simplifies power design but requires compatible 12V-tolerant GPIOs. For mixed-voltage systems (e.g., 3.3V MCU controlling ±15V analog paths), VL should be independently supplied at 3.3V or 5V to maintain safe logic margins - a configuration validated in the Truth Tables and Pin Description sections.

Is break-before-make timing specified over temperature for MAX4663EWE+T?

Yes, break-before-make time (t_OPEN) is specified from −40°C to +85°C as 5ns minimum to 125ns maximum under dual-supply conditions (V+ = +15V, V− = −15V, VL = +5V). This specification appears in the "ELECTRICAL CHARACTERISTICS-Dual Supplies" table and is guaranteed by design (Note 3). It ensures reliable channel isolation across the full industrial temperature range - essential for applications like PBX line switching where momentary shorts could trigger fault detection or damage line interface transformers.

What is the typical off-isolation performance of MAX4663EWE+T at 10MHz?

Off-isolation for the MAX4663EWE+T is −56dB typical at 1MHz (dual supply), degrading to approximately −35dB at 10MHz based on the −20dB/decade roll-off trend shown in Figure 8 of the datasheet. This frequency-dependent degradation occurs because the off-state behaves capacitively (COFF ≈ 85pF), forming a low-pass path between NO/NC and COM. For RF-sensitive applications above 5MHz, layout isolation and guard traces are mandatory - and the datasheet recommends the MAX440 series for fully characterized >100MHz operation.