Analog Devices Inc./Maxim Integrated MAX312LESE+

Overview

MAX312LESE+ from Maxim Integrated is a quad, normally closed (NC), single-pole/single-throw (SPST) analog switch IC designed for precision signal routing in high-reliability industrial and test systems. It delivers ≤15Ω on-resistance (max), ≤3Ω on-resistance match between channels, ±100mA continuous current handling, and operates from dual ±4.5V to ±20V or single +4.5V to +36V supplies - enabling rail-to-rail analog signal switching in audio and data-acquisition front-ends.

For engineers reviewing the MAX312LESE+ datasheet, MAX312LESE+ pinout, MAX312LESE+ application, or MAX312LESE+ equivalent, this page provides verified electrical specifications, package-confirmed pin functions, real-world use cases in avionics and xDSL modems, and two validated alternative parts with documented functional and application-level differences.

Technical Context

The MAX312LESE+ implements four independent NC SPST switches using CMOS process technology, with logic inputs compatible with +3V TTL/CMOS levels (VIH = 2.0V, VIL = 0.8V) across its full operating temperature range of –40°C to +85°C. Its architecture ensures symmetrical conduction, low charge injection (±30pC), and guaranteed R_ON flatness ≤4Ω over signal ranges up to ±10V (dual supply) or 0–+10V (single supply).

It supports power-supply sequencing-free operation - eliminating latch-up risk without requiring VL bias or strict V+/V− ramp order - and features integrated ESD protection with off-isolation >75dB at 1MHz and crosstalk <–85dB, making it suitable for mixed-signal environments where signal integrity and supply robustness are critical.

Key Specifications

Pinout & Package

MAX312LESE+ is housed in a 16-pin narrow SO (Small Outline) package per JEDEC MS-012, with 1.27mm pitch and gull-wing leads. Pin 1 is marked by a beveled corner or dot; thermal performance supports 696mW at +70°C (derating 8.70mW/°C above).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX312LCSE, the MAX312LESE+ adds extended temperature support and higher reliability margin; versus ADG1412BRUZ, it offers true NC default behavior and drop-in replacement for legacy MAX312 designs - making it optimal for safety-critical or upgrade-constrained systems.

Availability

MAX312LESE+ is available at Aetrix Electronics and suitable for test equipment, avionics signal routing, and xDSL modem designs requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX312LESE+ 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 MAX312L/MAX313L/MAX314L family was engineered to replace electromechanical relays and older CMOS switches in mission-critical analog routing, emphasizing NC/NO flexibility, supply robustness, and guaranteed parameter matching across temperature.

FAQ

What is the maximum continuous current rating for MAX312LESE+?

The MAX312LESE+ supports ±100mA continuous current through each COM/NC channel. This rating applies across the full operating temperature range (–40°C to +85°C) and ensures reliable conduction without thermal derating in typical PCB layouts with adequate copper area. Exceeding this limit risks permanent damage due to localized heating at the bond wires or die interconnects.

Does MAX312LESE+ require a specific power-supply sequencing order?

No - MAX312LESE+ is explicitly designed for power-supply sequencing-free operation. Unlike earlier MAX312 variants, it eliminates the VL pin and tolerates arbitrary ramp sequences for V+ and V−. However, absolute maximum ratings (e.g., V+ to V− ≤ +44V) must never be exceeded during power-up or transient events to prevent latch-up or permanent damage to the MAX312LESE+.

Can MAX312LESE+ operate from a single +12V supply?

Yes - MAX312LESE+ supports single-supply operation from +4.5V to +36V. When using +12V, connect V− to GND and ensure logic inputs meet VIH ≥ 2.0V and VIL ≤ 0.8V. The analog signal range becomes 0V to +12V, and R_ON remains ≤35Ω (max) at +10V signal level, making it suitable for industrial PLC I/O modules and DC-coupled sensor interfaces.

What is the meaning of "normally closed" in MAX312LESE+?

"Normally closed" means that each of the four SPST switches in the MAX312LESE+ conducts (COM–NC path closed) when its corresponding IN pin is logic low (≤0.8V). At power-up or logic fault, the switch defaults to closed - a critical safety feature in avionics and medical monitoring where signal continuity must be assured without active control. The MAX312LESE+ maintains this behavior across –40°C to +85°C.

How does MAX312LESE+ compare to the original MAX312 in terms of pin compatibility?

MAX312LESE+ is pin-compatible with the legacy MAX312 series (including MAX312, MAX313, MAX314) and also with DG411/DG412/DG413 devices. All share identical 16-pin SO/TSSOP/DIP footprints and pin functions - allowing direct replacement in existing designs without layout changes. However, the MAX312LESE+ improves on leakage (2.5nA vs. 5nA), adds extended temperature range, and removes the VL pin requirement.