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, factory-set VCC1 threshold of 4.63V and VCC2 threshold of 2.93V, 20µA supply current, 100ms min reset pulse width, and integrated watchdog timer featuring 46.4s startup timeout and 2.9s normal timeout - used in multivoltage embedded systems requiring reliable power-on and fault detection.

For engineers reviewing the MAX6360LSUT+ datasheet, MAX6360LSUT+ pinout, MAX6360LSUT+ application, or MAX6360LSUT+ equivalent, key selection criteria include dual-supply monitoring with independent thresholds, guaranteed RESET validity down to VCC1 = 1V or VCC2 = 1V, debounced manual reset input, watchdog timer timing parameters, and SOT23-6 package compatibility for space-constrained designs.

Technical Context

The MAX6360LSUT+ implements a dual-threshold voltage monitor with precision factory-trimmed comparators for VCC1 and VCC2, asserting reset when either supply drops below its respective trip point (4.63V/2.93V). Its watchdog timer operates in two modes: a 46.4s startup timeout after power-up or reset, followed by a 2.9s normal timeout requiring periodic WDI edge transitions.

Reset outputs are push-pull and referenced to VCC2, ensuring rail-to-rail logic levels without external pull-ups. The device guarantees functional operation over –40°C to +85°C and maintains valid reset state as long as either VCC1 ≥ 1.0V or VCC2 ≥ 1.0V - critical for brownout resilience in battery-backed or dynamically powered systems.

Key Specifications

Pinout & Package

MAX6360LSUT+ is housed in a 6-pin SOT23-6 package with 1.6mm × 2.9mm footprint and 0.95mm height, suitable for high-density PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6360LTUT+, the MAX6360LSUT+ offers higher VCC1 trip point (4.63V vs. 4.38V) for improved noise margin on 5V rails, while retaining identical watchdog timing and package. Compared with TPS3808G33DBVR, it provides full dual-rail supervision and integrated watchdog - eliminating need for additional ICs in multivoltage systems.

Availability

MAX6360LSUT+ is available at Aetrix Electronics and suitable for industrial control systems, portable medical devices, automotive gateways, and smart energy meters 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 precision analog and mixed-signal ICs for industrial, communications, computing, and consumer applications.

The MAX6351–MAX6360 family delivers dual- and triple-voltage µP supervision with factory-trimmed thresholds, low quiescent current, and integrated watchdog timers - targeting space- and power-constrained embedded systems needing high reliability without external components.

FAQ

What is the reset output configuration of the MAX6360LSUT+?

The MAX6360LSUT+ features a single active-low push-pull reset output (RST) referenced to VCC2. This eliminates the need for an external pull-up resistor and ensures full rail-to-rail logic swing compatible with VCC2-referenced microcontrollers. The output remains valid as long as VCC2 ≥ 1.0V or VCC1 ≥ 1.0V, supporting brownout resilience. This behavior is confirmed in the Pin Description and Detailed Description sections of the MAX6360LSUT+ datasheet.

Does the MAX6360LSUT+ support monitoring a third voltage?

No, the MAX6360LSUT+ does not support a third voltage monitor. That capability is exclusive to the MAX6355/MAX6356/MAX6357 variants, which include the RSTIN input pin. The MAX6360LSUT+ is a dual-voltage supervisor only, with dedicated VCC1 and VCC2 inputs and corresponding 4.63V and 2.93V thresholds. Its pinout omits RSTIN and instead includes WDI for watchdog functionality - a mutually exclusive feature set within the MAX6351–MAX6360 family.

What are the exact watchdog timeout values for the MAX6360LSUT+?

The MAX6360LSUT+ watchdog timer has a 46.4s startup timeout period following any reset event (power-up, MR assertion, or watchdog timeout), and a 2.9s normal timeout period during steady-state operation. These values are specified in the Electrical Characteristics table under "Watchdog Timeout Period (tWD)" with typical values of 46.4s and 2.9s respectively. The startup mode allows time for system initialization before watchdog enforcement begins, and the normal mode requires periodic WDI edge transitions to prevent reset assertion.

Can the MAX6360LSUT+ operate with VCC1 and VCC2 supplied from the same voltage rail?

Yes, the MAX6360LSUT+ can operate with VCC1 and VCC2 connected to the same voltage rail, provided that rail falls within the 1.2V to 5.5V operating range and meets both threshold requirements. However, doing so negates the dual-supply monitoring benefit - the device will assert reset only if that shared rail drops below the lower of the two thresholds (2.93V for VCC2). For single-rail applications, a simpler supervisor like the MAX6326 may be more appropriate, but the MAX6360LSUT+ remains functionally valid in this configuration.

What is the manual reset (MR) input behavior on the MAX6360LSUT+?

The MR input on the MAX6360LSUT+ is an active-low, debounced TTL/CMOS-compatible signal with an internal ~63.5kΩ pull-up resistor. Driving MR low forces an immediate reset pulse for the full timeout period (≥100ms), regardless of VCC1/VCC2 status. When released, the device exits reset after the timeout completes. MR must not exceed VCC1 voltage, and should be left unconnected or tied to VCC1 if unused. This behavior is guaranteed over the full –40°C to +85°C temperature range.