Analog Devices Inc./Maxim Integrated MAX6454UT16S+

Overview

MAX6454UT16S+ from Maxim Integrated is a low-power, dual-output µP supervisor IC with separate active-low open-drain VCC reset and manual reset outputs. It monitors primary supply voltage (VCC) at 1.575V threshold and secondary voltage via adjustable RSTIN input down to 0.63V, delivering 140ms minimum reset timeout and 3.36s manual reset setup period. Used in consumer electronics for soft/hard reset coordination during power-up and brownout events.

For engineers reviewing the MAX6454UT16S+ datasheet, MAX6454UT16S+ pinout, MAX6454UT16S+ application, or MAX6454UT16S+ equivalent, this page provides verified circuit role, exact reset thresholds, manual reset timing behavior, SOT23-6 package mapping, and validated alternative options for embedded system supervision.

Technical Context

The MAX6454UT16S+ implements independent monitoring paths: VCC is compared against a factory-set 1.575V threshold with ±60ppm/°C tempco, while RSTIN accepts externally scaled voltages using a high-impedance 0.63V reference. Its MR input controls only MROUT - not RESET - enabling non-disruptive NMI assertion without triggering full reboot.

Reset assertion occurs when either VCC or RSTIN falls below its respective threshold; deassertion requires both inputs to exceed thresholds plus 140ms timeout. The device guarantees valid RESET output down to VCC = 1.0V and draws only 6µA typical supply current at 3.6V.

Key Specifications

Pinout & Package

SOT23-6 package with 1.6mm × 2.9mm footprint, lead(Pb)-free, fully specified from –40°C to +85°C.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6453UT16S+, the MAX6454UT16S+ offers open-drain flexibility for bus sharing and level translation, while the TPS3808G15DBVR reduces feature set and cost but sacrifices MROUT-based NMI support and RSTIN scalability.

Availability

MAX6454UT16S+ is available at Aetrix Electronics and suitable for set-top boxes, DVD players, and cable modems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MAX6454UT16S+ 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 is a semiconductor company specializing in analog and mixed-signal ICs for power, sensing, interface, and reliability-critical applications.

The MAX6453–MAX6456 family delivers precision voltage supervision with dual independent reset outputs, designed specifically for consumer and industrial systems needing coordinated soft/hard reset control without MCU involvement.

FAQ

What is the exact VCC reset threshold voltage for MAX6454UT16S+?

The MAX6454UT16S+ has a factory-set VCC reset threshold of 1.575V, with ±1.5% tolerance over temperature. This value is laser-trimmed during production and confirmed in the Electrical Characteristics table under "VCC Reset Threshold" for suffix "16". It is intended for monitoring 1.6V system rails and remains stable across the full –40°C to +85°C operating range with 60ppm/°C tempco.

Does MAX6454UT16S+ assert the RESET output when the manual reset (MR) pin is pulled low?

No, the MAX6454UT16S+ does not assert the RESET output in response to the MR input. Its MR pin controls only the MROUT output - the RESET output is triggered exclusively by VCC or RSTIN falling below their respective thresholds. This separation is a defining feature of the MAX6453/MAX6454 variant group, enabling safe NMI generation without unintended system reboot.

What is the function of the RSTIN pin on MAX6454UT16S+?

The RSTIN pin on MAX6454UT16S+ is a high-impedance input to an internal 0.63V comparator, allowing external resistor-divider networks to scale and monitor secondary supply voltages down to 0.63V. When the divided voltage at RSTIN falls below 0.63V, it triggers the same RESET output assertion as VCC dropout - providing dual-rail supervision with one IC.

What package type and dimensions does MAX6454UT16S+ use?

The MAX6454UT16S+ uses a lead(Pb)-free SOT23-6 package (package code U6-1), measuring 1.6mm × 2.9mm with 0.95mm height. Pin pitch is 0.95mm, and the land pattern follows Maxim's standard 90-0175 footprint. The "+" suffix explicitly denotes RoHS-compliant, lead-free construction per Maxim's ordering convention.

How does the open-drain output configuration of MAX6454UT16S+ benefit system design?

The open-drain RESET and MROUT outputs of MAX6454UT16S+ allow wired-OR connection of multiple supervisors, level-shifting across different logic domains (e.g., 3.3V supervisor driving 5V µP reset), and elimination of contention in shared reset buses. Each output requires an external pullup resistor tied to the target logic supply, giving designers full control over rise time and voltage compatibility - a key advantage over push-pull alternatives like MAX6453UT16S+.