Analog Devices Inc./Maxim Integrated MAX4609CSE

Overview

MAX4609CSE from Maxim Integrated is a dual single-pole single-throw (SPST) CMOS analog switch with one normally closed (NC) and one normally open (NO) channel, 2.5Ω maximum on-resistance, rail-to-rail signal handling, ±4.5V to ±20V dual-supply or +4.5V to +36V single-supply operation, and TTL/CMOS-compatible logic inputs. It replaces electromechanical relays in test equipment and audio-signal routing where low distortion and high reliability are required.

For engineers reviewing the MAX4609CSE datasheet, MAX4609CSE pinout, MAX4609CSE application, or MAX4609CSE equivalent, key selection criteria include guaranteed R_ON match (≤0.5Ω), R_ON flatness (≤0.5Ω), off-isolation (−60dB at 1MHz), charge injection (45pC), and −40°C to +85°C extended temperature variants.

Technical Context

The MAX4609CSE implements a BiCMOS process-based SPST analog switch architecture with independent control of two channels: Switch 1 is NC (closed when IN1 = LOW), Switch 2 is NO (closed when IN2 = HIGH). Each channel supports bidirectional rail-to-rail analog signals across the full supply range, with matched on-resistance and flat R_ON over the specified input voltage range (V_- to V₊).

Logic inputs feature fixed TTL/CMOS thresholds (V_{IN_H} = 2.4V min, V_{IN_L} = 0.8V max) referenced to GND, while VL provides a separate logic supply input for level-shifting compatibility. The device guarantees ESD protection >2kV per Method 3015.7 and operates with leakage currents ≤2.5nA at +85°C.

Key Specifications

Pinout & Package

MAX4609CSE is housed in a 16-pin narrow SO (Small Outline) package with 1.27mm pitch, RoHS-compliant, and rated for 0°C to +70°C operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADG1419BRUZ and TS5A23157DCUR, the MAX4609CSE uniquely combines dual-supply operation, guaranteed R_ON matching, rail-to-rail signal handling, and robust ESD protection-making it the preferred choice for industrial test, avionics, and high-fidelity audio where signal fidelity and supply flexibility are non-negotiable.

Availability

MAX4609CSE is available at Aetrix Electronics and suitable for automated test equipment, audio signal routing, avionics sensor interfaces, and reed relay replacement applications requiring stable component supply and long-term manufacturability.

Supply support for MAX4609CSE 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 industrial, communications, computing, and automotive markets.

The MAX4607/MAX4608/MAX4609 family was engineered specifically for high-reliability, low-distortion analog switching in test and measurement, telecom infrastructure, and aerospace systems demanding rail-to-rail operation and tight parameter matching.

FAQ

What is the maximum supply voltage rating for MAX4609CSE?

The MAX4609CSE supports absolute maximum ratings of V+ to GND = −0.3V to +44V and V− to GND = +0.3V to −44V. Its operational dual-supply range is ±4.5V to ±20V, and single-supply range is +4.5V to +36V. Exceeding these limits risks permanent damage, and proper sequencing (V+ first, then V−, then logic inputs) is required to avoid overstress.

Does MAX4609CSE support rail-to-rail analog signal switching?

Yes, the MAX4609CSE supports rail-to-rail analog signal handling across its full specified supply range - from V− to V+ - with guaranteed low on-resistance flatness (≤0.5Ω) and minimal distortion. This capability is confirmed in the Electrical Characteristics tables and Typical Operating Characteristics plots for both dual- and single-supply configurations of MAX4609CSE.

What is the function of the VL pin on MAX4609CSE?

The VL pin on MAX4609CSE provides an independent logic supply reference, allowing TTL/CMOS-compatible input thresholds (0.8V/2.4V) to be maintained regardless of analog supply voltage. This enables reliable interfacing with 3.3V or 5V microcontrollers even when V+ is set to +24V or ±15V - a key design feature confirmed in the Pin Description and Electrical Characteristics sections of the MAX4609CSE datasheet.

How does the MAX4609CSE differ from MAX4607CSE and MAX4608CSE?

The MAX4609CSE integrates one normally closed (NC) switch and one normally open (NO) switch in a single 16-pin SO package. In contrast, MAX4607CSE contains two NC switches, and MAX4608CSE contains two NO switches. All three share identical electrical specs (R_ON, leakage, supply range), but their truth tables and pin functions differ - specifically, IN1 controls NC1 (active-low) and IN2 controls NO2 (active-high) in MAX4609CSE.

What is the guaranteed on-resistance match specification for MAX4609CSE?

The MAX4609CSE guarantees an on-resistance match (∆R_ON) of ≤0.5Ω maximum between its two channels over the full operating temperature range (0°C to +70°C for the CSE variant), measured at I_COM = 10mA and V_NO/V_NC = −5V, 0V, or +5V. This parameter is 100% tested and explicitly listed in the Electrical Characteristics table for dual-supply conditions.