Analog Devices Inc./Maxim Integrated MAX4608CPE

Overview

MAX4608CPE from Maxim Integrated is a dual, normally open (NO), single-pole single-throw (SPST) CMOS analog switch with 2.5Ω max on-resistance, rail-to-rail signal handling (±15V dual or +12V single supply), and 2.5nA max off-leakage at +85°C. It operates across 0°C to +70°C and is used in audio-signal routing, test equipment, and PBX systems where low distortion and mechanical relay replacement are critical.

For engineers reviewing the MAX4608CPE datasheet, MAX4608CPE pinout, MAX4608CPE application, or MAX4608CPE equivalent, key selection criteria include guaranteed R_ON match (≤0.5Ω), TTL/CMOS-compatible logic thresholds (+0.8V/+2.4V), and dual-supply operation (±4.5V to ±20V) supporting industrial signal-switching integrity.

Technical Context

The MAX4608CPE implements two independent SPST switches with NO configuration, each controlled by separate digital inputs (IN1, IN2) referenced to VL. Its BiCMOS process enables low charge injection (45pC) and flat on-resistance (≤0.5Ω variation over ±10V signal range), ensuring minimal harmonic distortion in precision analog paths.

It supports both single-supply (+4.5V to +36V) and dual-supply (±4.5V to ±20V) operation with guaranteed logic compatibility-inputs tolerate +0.8V low and +2.4V high thresholds regardless of supply mode. ESD protection exceeds 2kV per Method 3015.7, and all analog pins handle rail-to-rail voltages without clamping under normal operation.

Key Specifications

Pinout & Package

MAX4608CPE uses a 16-pin plastic DIP (dual in-line package) with 0.3-inch body width and through-hole mounting. Pin spacing is 0.1 inch, compatible with standard PCB layouts and socket-based prototyping.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADG1414BRUZ and TS5A23157DGSR, the MAX4608CPE uniquely balances low R_ON, wide supply flexibility, and through-hole DIP packaging - making it optimal for retrofitting relay-based test fixtures and maintaining compatibility with existing +12V/±15V infrastructure.

Availability

MAX4608CPE is available at Aetrix Electronics and suitable for automatic test equipment, PBX telephony systems, and avionics signal conditioning requiring stable component supply and long-term industrial availability.

Supply support for MAX4608CPE 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 and mixed-signal ICs for industrial, communications, and computing applications, emphasizing reliability and specification rigor.

The MAX4607/MAX4608/MAX4609 family was engineered specifically for high-fidelity analog signal routing in environments demanding low distortion, rail-to-rail operation, and mechanical relay replacement - targeting test, telecom, and aerospace markets.

FAQ

What is the maximum allowable voltage difference between V+ and V− for MAX4608CPE?

The absolute maximum rating specifies V+ to V− must not exceed +44V. This limit ensures safe operation of internal ESD protection diodes and prevents junction breakdown. For reliable long-term use, maintain ≤±20V dual-supply operation as specified in the Electrical Characteristics table. Exceeding this differential risks permanent damage even if individual rail voltages remain within range. The MAX4608CPE datasheet explicitly defines this constraint in the Absolute Maximum Ratings section.

Does MAX4608CPE support single-supply operation with V− tied to GND?

Yes, MAX4608CPE supports single-supply operation with V− connected to GND and V+ set between +4.5V and +36V. In this configuration, analog signals can swing from 0V to V+, and logic inputs remain TTL/CMOS-compatible via VL referenced to GND. The device's rail-to-rail capability ensures full signal utilization without clipping. All electrical specifications-including 2.5Ω R_ON and 2.5nA off-leakage-are validated under single-supply conditions per the datasheet's "Electrical Characteristics-Single Supply" table.

How does the NO configuration of MAX4608CPE differ from MAX4607CPE and MAX4609CPE?

MAX4608CPE contains two normally open (NO) switches: COM1 connects to NO1 only when IN1 is high, and COM2 connects to NO2 only when IN2 is high. In contrast, MAX4607CPE has two normally closed (NC) switches (conduct when IN is low), and MAX4609CPE combines one NC and one NO switch. This functional distinction is hardwired in silicon and cannot be reconfigured. The MAX4608CPE pinout reflects this via dedicated NO1/NO2 pins (9, 16) and absence of NC pins - confirmed in the Pin Description table on page 7 of the datasheet.

Can MAX4608CPE be used in high-frequency RF applications above 10MHz?

MAX4608CPE is not characterized for RF operation above 5MHz. Off-isolation degrades significantly beyond this point (e.g., −60dB at 1MHz drops to <−20dB at 100MHz), and crosstalk increases due to parasitic capacitance. The datasheet explicitly recommends MAX440/MAX441/MAX442 for applications requiring full characterization up to 160MHz. For MAX4608CPE, use below 1MHz in precision analog routing; above that, layout-dependent performance makes predictable design impractical without empirical validation.

What is the purpose of the VL pin on MAX4608CPE, and what voltage range does it accept?

The VL pin supplies power to the internal logic circuitry and sets the reference for digital input thresholds. It accepts +2.7V to +5.5V, independent of V+/V− analog supplies. This allows interfacing with 3.3V or 5V microcontrollers while operating analog sections at ±15V. A 0.1µF ceramic capacitor between VL and GND is mandatory for noise suppression. The MAX4608CPE datasheet specifies VL tolerance and decoupling requirements in the "Power Supply" section of Electrical Characteristics and Figure 2's test circuit.