Analog Devices Inc./Maxim Integrated MAX6360LSUT

Overview

MAX6360LSUT from Maxim Integrated is a dual-voltage microprocessor supervisory IC with active-low push-pull reset output referenced to VCC2, precision factory-set thresholds of 4.63V (VCC1) and 2.93V (VCC2), watchdog timer (46.4s startup / 2.9s normal timeout), and guaranteed RESET validity down to VCC2 = 1.0V. It monitors independent power rails in multivoltage embedded systems to prevent erratic µP operation during brownout or power-up.

For engineers reviewing the MAX6360LSUT datasheet, MAX6360LSUT pinout, MAX6360LSUT application, or MAX6360LSUT equivalent, this device supports critical timing-critical reset coordination, watchdog-enabled firmware recovery, and dual-supply integrity verification in space-constrained industrial controllers and portable instrumentation.

Technical Context

The MAX6360LSUT implements dual independent voltage comparators with ±1.5% threshold accuracy over –40°C to +85°C, hysteresis of VTH/500, and temperature coefficient of 20ppm/°C. Its reset generator asserts RST2 low when either VCC1 drops below 4.63V or VCC2 drops below 2.93V, with 100ms minimum reset pulse width and <20µs delay from supply overdrive.

It integrates a dual-mode watchdog timer: after power-on or manual reset, it enforces a 46.4s startup timeout before entering 2.9s normal mode; WDI transitions must occur within that window to prevent reset assertion. The MR input is debounced TTL/CMOS-compatible and guarantees reset hold for ≥1µs pulse width.

Key Specifications

Pinout & Package

MAX6360LSUT is housed in a 6-pin SOT23-6 package (2.9mm × 1.6mm × 1.1mm), RoHS-compliant and available in lead-free version (suffix +T).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-voltage supervisory applications.

Compared with MAX6354LSUT, MAX6360LSUT adds essential watchdog capability for firmware health monitoring; versus TPS3808G33DBVR, it delivers true dual-rail supervision in one chip - reducing PCB area, interconnect complexity, and system-level validation effort.

Availability

MAX6360LSUT is available at Aetrix Electronics and suitable for industrial control systems, portable medical devices, automotive infotainment units, and network infrastructure equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX6360LSUT 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 semiconductor solutions for industrial, communications, and consumer markets.

The MAX6351–MAX6360 family delivers precision dual/triple-voltage supervision with integrated watchdog timers, targeting reliability-critical embedded systems where power integrity and firmware robustness are non-negotiable.

FAQ

What is the exact reset threshold voltage for VCC1 and VCC2 on the MAX6360LSUT?

The MAX6360LSUT has factory-set thresholds of 4.63V for VCC1 and 2.93V for VCC2, with ±1.5% accuracy over –40°C to +85°C. These values are laser-trimmed during production and do not require external calibration. The 'LS' suffix explicitly denotes this threshold pair per Maxim's Voltage Threshold Levels table, and the MAX6360LSUT datasheet confirms these values in the Electrical Characteristics section under VTH1 and VTH2.

Does the MAX6360LSUT provide a push-pull or open-drain reset output?

The MAX6360LSUT provides an active-low push-pull reset output (RST) referenced to VCC2 - confirmed in the Pin Description table and Detailed Description section. This eliminates the need for an external pull-up resistor and ensures fast, rail-consistent reset assertion. Unlike MAX6352/MAX6355/MAX6358 variants, the MAX6360LSUT does not use open-drain topology.

How does the watchdog timer operate on the MAX6360LSUT?

The MAX6360LSUT watchdog features dual-mode timing: a 46.4s startup timeout after power-on or reset, followed by a 2.9s normal timeout. Each rising or falling edge on WDI resets the timer. If no transition occurs within the active timeout window, RST is asserted for 100–280ms. This behavior is explicitly defined in the Electrical Characteristics table under "Watchdog Timeout Period" and verified in Figure 3 of the datasheet.

Can the MAX6360LSUT operate with VCC2 below 1.2V?

No - the MAX6360LSUT requires VCC2 ≥ 1.2V for functional operation, though its RST output remains valid (guaranteed low or high) down to VCC2 = 1.0V. The Absolute Maximum Ratings specify VCC2 to GND as –0.3V to +6V, but the Operating Temperature Range section and Electrical Characteristics table define the functional supply range as 1.2V to 5.5V. Operation below 1.2V is outside specification and not characterized.

Is the MAX6360LSUT pin-compatible with other devices in the MAX6351–MAX6360 family?

The MAX6360LSUT uses the 6-pin SOT23-6 package and shares identical pinout with MAX6355/MAX6356/MAX6357/MAX6358/MAX6359 - confirmed in the Pin Configurations diagram and Selector Guide. Pin 1 = RST, Pin 2 = GND, Pin 3 = MR, Pin 4 = VCC2, Pin 5 = WDI, Pin 6 = VCC1. However, functional differences exist: MAX6355 offers open-drain RST, MAX6356 uses VCC1-referenced RST, and MAX6357 mirrors MAX6360LSUT's VCC2-referenced RST but lacks watchdog.