Analog Devices Inc./Maxim Integrated MAX361CSE+

Overview

MAX361CSE+ from Maxim Integrated is a precision quad SPST analog switch with normally closed (NC) configuration, designed for high-fidelity signal routing in rail-to-rail analog paths. It delivers <85Ω on-resistance (max), <3Ω channel-to-channel match, <9Ω on-resistance flatness over signal range, <500pA leakage at +25°C, and sub-250ns turn-on time - enabling accurate sample-and-hold and low-distortion multiplexing in test equipment and guidance systems.

For engineers reviewing the MAX361CSE+ datasheet, MAX361CSE+ pinout, MAX361CSE+ application, or MAX361CSE+ equivalent, key selection criteria include guaranteed bipolar supply operation (±4.5V to ±20V), 2000V ESD rating, 10pC charge injection, and narrow SO-16 package compatibility with space-constrained industrial control and communications PCBs.

Technical Context

The MAX361CSE+ implements four independent NC switches fabricated in Maxim's 44V silicon-gate process, supporting both unipolar (+10V to +30V) and bipolar (±4.5V to ±20V) supplies while maintaining CMOS/TTL logic compatibility. Its architecture guarantees matched on-resistance and flat R_ON only under bipolar operation - critical for precision gain-setting and chopper-stabilized amplifier front-ends.

Charge injection (<10pC) and off-leakage (<4nA at +85°C) are tightly specified across temperature, enabling stable DC-coupled switching in battery-operated systems and high-impedance sensor interfaces. Rail-to-rail analog handling up to ±15.5V with 44V breakdown ensures robustness in ±15V industrial signal chains.

Key Specifications

Pinout & Package

MAX361CSE+ uses a 16-pin narrow SOIC (SO-16N) package with exposed pad connected to V+. Pin 1 is IN1; pins 2–4, 7–9, 12–14 are COM/NO/NC terminals; pins 5 (GND), 4 (V−), 11 (V+), and 10 (N.C.) define power and logic interface.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADG441BRZ and TS5A3154DCKR, MAX361CSE+ uniquely provides NC default state, bipolar supply support, and guaranteed R_ON matching - making it irreplaceable in safety-critical analog monitoring and industrial ±15V signal conditioning where continuity on power loss is mandatory.

Availability

MAX361CSE+ is available at Aetrix Electronics and suitable for sample-and-hold circuits, guidance and control systems, and test equipment requiring stable component supply across extended temperature and voltage ranges.

Supply support for MAX361CSE+ 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, mixed-signal, and power management ICs for industrial, communications, and computing applications.

The MAX361 series targets precision analog signal routing in environments demanding low leakage, matched on-resistance, and rail-to-rail operation - especially in military-grade test gear and aerospace guidance subsystems.

FAQ

What is the maximum analog signal voltage range supported by MAX361CSE+?

MAX361CSE+ supports rail-to-rail analog signals from V− − 2V to V+ + 2V, with absolute maximum ratings allowing ±15.5V swing under ±15V supplies. The 44V breakdown voltage between V+ and V− enables safe operation with up to ±20V bipolar supplies, making MAX361CSE+ suitable for legacy ±15V instrumentation and 24V industrial systems where signal integrity at voltage extremes is critical.

Does MAX361CSE+ require external protection against ESD or overvoltage?

MAX361CSE+ features >2000V HBM ESD rating and 44V V+/V− breakdown, eliminating need for external ESD diodes in most board-level implementations. However, if supply sequencing cannot guarantee V+ powers first, two small-signal diodes in series with V+ and V− (as shown in Figure 6 of the datasheet) provide overvoltage clamping - reducing analog range by 1V but preserving MAX361CSE+'s core low-leakage and low-R_ON performance.

Can MAX361CSE+ operate from a single +12V supply?

Yes, MAX361CSE+ operates from +10V to +30V unipolar supplies. At +12V, its analog signal range is 0V to +12V, on-resistance rises to 160Ω (max), and turn-on time increases to 400ns (max). For applications requiring tight R_ON matching or low charge injection, bipolar operation (e.g., ±12V) is preferred - but MAX361CSE+ remains fully functional and specified in unipolar mode for cost-sensitive 12V systems.

How does the normally closed (NC) configuration of MAX361CSE+ impact system reliability?

The NC configuration ensures signal continuity between COM and NC terminals when logic inputs are inactive (low) or during power loss - a critical safety feature in guidance systems and medical monitors. Unlike NO switches, MAX361CSE+ defaults to closed path, preventing open-circuit faults that could disrupt feedback loops or sensor biasing. This inherent fail-safe behavior makes MAX361CSE+ preferred over alternatives like MAX362CSE+ in applications where uninterrupted analog path integrity is mandated.

What is the thermal performance of MAX361CSE+ in narrow SOIC package?

MAX361CSE+ in narrow SOIC (SO-16N) has a thermal resistance θ_JA of 115°C/W and derates 8.70mW/°C above +70°C, supporting 696mW continuous dissipation at ambient. With typical power consumption of 35µW, self-heating is negligible - enabling stable R_ON and leakage performance even in sealed enclosures. The exposed pad (connected to V+) enhances thermal conduction, making MAX361CSE+ suitable for high-density layouts in compact test equipment modules.