Analog Devices Inc./Maxim Integrated MAX6361HUT23

Overview

MAX6361HUT23 from Maxim Integrated is a low-power microprocessor supervisory circuit with factory-preset 2.32V reset threshold, battery switchover capability, and debounced manual reset input (MR). It operates from +1.2V supply, delivers up to 150mA from VCC or backup battery, asserts active-high RESET output, and supports SRAM backup in brownout conditions. Used in portable instrumentation and industrial controllers requiring reliable power monitoring.

For engineers reviewing the MAX6361HUT23 datasheet, MAX6361HUT23 pinout, MAX6361HUT23 application, or MAX6361HUT23 equivalent, this page provides verified functional identity, SOT23-6 pin mapping, battery-switchover timing behavior, reset timeout accuracy, and direct alternatives for µP reset and backup-battery control designs.

Technical Context

The MAX6361HUT23 integrates a precision voltage comparator with 2.32V ±1.5% threshold, internal 20kΩ MR pull-up resistor, and dual-path power routing: VCC powers OUT above threshold; below threshold, OUT switches to VBATT when VBATT > VCC + 20mV (40mV hysteresis). Reset assertion is synchronized to VCC fall/rise and MR transitions, with guaranteed 150ms minimum timeout.

Its active-high push-pull RESET output drives µP reset inputs directly without external pull-ups. The device guarantees RESET/RESET validity down to 1.2V on either VCC or VBATT, and features 100ns glitch immunity on MR with 120ns propagation delay from MR to RESET assertion.

Key Specifications

Pinout & Package

Package: SOT23-6, -40°C to +85°C operating range, 6-pin surface-mount package with 1.3mm × 2.9mm footprint.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar µP supervisory applications.

Compared with MAX6361HUT23, MAX6361HUT26 offers higher reset threshold for improved noise margin on 2.7V rails, while TPS3808G12DBVR provides lower quiescent current (1.5µA) but omits integrated battery switchover-requiring additional components for SRAM retention.

Availability

MAX6361HUT23 is available at Aetrix Electronics and suitable for portable medical devices, industrial edge controllers, point-of-sale terminals, and battery-backed data loggers requiring stable component supply across multi-year production cycles.

Supply support for MAX6361HUT23 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 power management, sensing, and interface applications in industrial, automotive, and computing markets.

The MAX6361 family targets ultra-low-power µP supervision with integrated battery switchover, specifically engineered for systems needing deterministic reset behavior and SRAM retention during AC mains or primary supply failure.

FAQ

What is the exact reset threshold voltage of MAX6361HUT23?

The MAX6361HUT23 has a factory-trimmed reset threshold of 2.32V, with ±1.5% tolerance over the full -40°C to +85°C temperature range. This value is specified in Table 1 of the datasheet and confirmed in the Electrical Characteristics section under "Reset Threshold (VTH)" for suffix "23". The threshold is internally generated and does not require external components.

Does MAX6361HUT23 support battery backup for SRAM, and how does switchover work?

Yes, MAX6361HUT23 supports battery backup for SRAM via its BATT and OUT pins. When VCC falls below 2.32V and VBATT exceeds VCC by at least 20mV, the internal MOSFET connects BATT to OUT within 20µs. Switchover includes 40mV hysteresis to prevent oscillation during slow VCC decay. The device sources up to 150mA from VCC or battery, ensuring stable SRAM voltage during transition.

What type of reset output does MAX6361HUT23 provide, and what are its drive characteristics?

MAX6361HUT23 provides an active-high push-pull RESET output. When asserted, RESET is driven to VOH ≥0.8·VCC (min) with ISOURCE = 1mA at VCC ≥1.8V; when deasserted, it sinks to VOL ≤0.4V with ISINK = 3.2mA. This eliminates the need for an external pull-up resistor and ensures direct compatibility with standard µP reset inputs requiring active-high assertion.

Can MAX6361HUT23 operate from a single 1.5V alkaline cell?

Yes, MAX6361HUT23 operates from supply voltages as low as +1.2V on either VCC or VBATT, making it compatible with single 1.5V alkaline cells. Its quiescent current is just 10µA at +2.8V and remains functional down to 1.2V, with RESET/RESET guaranteed valid across the full 1.2V–5.5V range-critical for long-life battery applications.

Is the manual reset input (MR) on MAX6361HUT23 debounced internally, and what is its default state?

Yes, the MR input on MAX6361HUT23 includes internal debounce circuitry and a 20kΩ pull-up resistor to VCC. Its default state is logic high; pulling MR ≤0.3·VCC asserts RESET for ≥150ms after MR returns high. No external RC network is required, and the input accepts TTL/CMOS logic levels or open-drain signals-ideal for momentary switch interfaces.