Analog Devices Inc./Maxim Integrated MAX4537CSE

Overview

MAX4537CSE from Maxim Integrated is a quad, low-voltage, normally closed (NC) SPST analog switch with common enable, operating from ±2V to ±6V dual or +2V to +12V single supply. It delivers 200Ω max on-resistance, 4Ω max channel matching, 10Ω max on-resistance flatness, rail-to-rail signal handling, and 1nA max off-leakage at +25°C - used in battery-operated audio-signal routing and portable test equipment.

For engineers reviewing the MAX4537CSE datasheet, MAX4537CSE pinout, MAX4537CSE application, or MAX4537CSE equivalent, this page provides verified electrical specs, package mapping to 16-pin narrow SO, truth-table-validated switching behavior, and direct alternatives for NC-configured quad analog switch replacement in low-power, rail-to-rail signal path designs.

Technical Context

The MAX4537CSE implements four independent NC SPST switches sharing a single active-low enable (EN) input; all switches open when EN = high. Its CMOS architecture uses complementary N- and P-channel MOSFETs per switch, driven by level-translated logic to V+ and V−, enabling true bidirectional rail-to-rail analog conduction without ground reference.

Supply-independent TTL/CMOS-compatible logic thresholds (0.8V–2.4V) ensure interoperability with +5V or ±5V digital controllers. ESD protection exceeds 2kV per Method 3015.7, and analog leakage is dominated by reverse-biased ESD diodes tied to V+ and V− - not GND - explaining polarity-flexible leakage paths.

Key Specifications

Pinout & Package

MAX4537CSE is housed in a 16-pin narrow SO package (SOIC-N), 3.9mm × 9.9mm body, 1.27mm lead pitch, JEDEC MS-012 compliant. Pin 1 is top-left corner (notch/dot side), with pins numbered counterclockwise.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX4536CSE and ADG1414BRUZ, the MAX4537CSE uniquely combines quad NC topology, common enable, SO-16 footprint, and sub-200Ω RON - making it optimal for safety-critical or default-connected signal routing where board space and control simplicity are constrained.

Availability

MAX4537CSE is available at Aetrix Electronics and suitable for battery-operated equipment, portable test equipment, and avionics signal conditioning requiring stable component supply across industrial temperature grades and long-lifecycle production.

Supply support for MAX4537CSE 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 demanding industrial, automotive, and communications applications.

The MAX4536/MAX4537/MAX4538 family was engineered specifically for low-voltage, rail-to-rail analog signal routing in portable and battery-sensitive systems - emphasizing leakage control, supply flexibility, and logic compatibility.

FAQ

What is the function of the EN pin on the MAX4537CSE?

The EN (enable) pin on the MAX4537CSE is an active-low global control that overrides individual IN1–IN4 inputs. When EN is high, all four NC switches open regardless of INx states - providing synchronized channel disable. This behavior is confirmed in the truth table and functional diagrams of the MAX4537CSE datasheet, and is essential for system-level mute or safety isolation. The MAX4537CSE relies on this pin for deterministic shutdown without requiring per-channel logic coordination.

Does the MAX4537CSE support single-supply operation?

Yes, the MAX4537CSE supports single-supply operation from +2V to +12V by connecting V− to GND. In this mode, analog signals swing from 0V to V+, maintaining rail-to-rail capability. Electrical characteristics including 200Ω max RON, 1nA off-leakage, and 100ns tON are fully specified for +4.5V and +5V single supplies. The MAX4537CSE's logic thresholds (0.8V/2.4V) remain TTL/CMOS-compatible at +5V, eliminating need for level shifters in microcontroller interfacing.

How does the MAX4537CSE differ from the MAX4536CSE?

The MAX4537CSE and MAX4536CSE share identical pinout, package, supply ranges, timing, and leakage specs - but differ fundamentally in switch logic: MAX4537CSE implements four normally closed (NC) switches, while MAX4536CSE implements four normally open (NO) switches. This means the MAX4537CSE conducts by default (INx = low, EN = low), whereas the MAX4536CSE requires active drive to close. The MAX4537CSE is selected where fail-safe closed-path behavior is required, such as sensor biasing or default audio routing.

What is the maximum allowable supply voltage differential for the MAX4537CSE?

The absolute maximum V+ to V− differential for the MAX4537CSE is 13.0V, as stated in the Absolute Maximum Ratings table. Exceeding this - even momentarily due to overshoot or tolerance stack-up (e.g., ±6V supplies with ±10% tolerance yield 13.2V) - risks permanent damage. Designers must verify worst-case supply rails; for ±5V systems, derating to ±5.5V ensures margin. This 13.0V limit applies strictly to the MAX4537CSE and is not relaxed in any temperature or operating condition.

Is the MAX4537CSE pin-compatible with the 74HC4316?

Yes, the MAX4537CSE is explicitly pin-compatible with the 74HC4316, as confirmed in the General Description and Features sections of its datasheet. Both use 16-pin SO, DIP, or QSOP packages with identical pin assignments for V+, V−, GND, EN, IN1–IN4, COM1–COM4, and NC1–NC4. However, the 74HC4316 is a quad NO device, so direct substitution requires verifying whether NC behavior (default closed) or NO behavior (default open) matches the target application's safety and power-up state requirements. The MAX4537CSE retains full electrical compatibility where NC functionality is intended.