Analog Devices Inc./Maxim Integrated MAX6460UT+T

Overview

The MAX6460UT+T from Analog Devices is a high-voltage, low-power single comparator voltage monitor IC designed for precision undervoltage/overvoltage detection in industrial and automotive power rails. It operates from 4V to 28V supply, features an internal 2.25V ±2.5% reference, delivers 3.5μA typical supply current at 12V, includes 0.5% internal threshold hysteresis, and provides a 50μs fixed timeout period with open-drain 28V-compliant output. It supports flexible configuration via externally accessible inverting/noninverting inputs and REF pin for active-high or active-low monitoring of positive or negative voltages.

For engineers reviewing the MAX6460UT+T datasheet, MAX6460UT+T pinout, MAX6460UT+T application, or MAX6460UT+T equivalent, this page delivers verified functional context, validated pin-level circuit roles, confirmed operating parameters across -40°C to +125°C, and real-world design implications for battery-stack supervision, DC-DC converter enable control, and overvoltage lockout circuits.

Technical Context

The MAX6460UT+T implements a precision bandgap-referenced comparator with externally configurable trip thresholds using resistor dividers connected to IN+, IN-, and REF pins. Its comparator input common-mode range (0–1.4V) and ±4.5mV input offset voltage enable accurate low-voltage threshold setting while maintaining noise immunity via 0.5% hysteresis.

It uses a single open-drain n-channel output rated to sink 10mA and tolerate up to 28V on the pullup side, independent of VCC. The device asserts low when VIN+ falls below VIN− (or vice versa depending on configuration), with output state held during VCC brownout down to 1.5V due to undervoltage lockout.

Key Specifications

Pinout & Package

MAX6460UT+T is housed in a RoHS-compliant, lead(Pb)-free 6-pin SOT23 package (package code U6+1A, outline 21-0058), optimized for space-constrained PCB layouts and thermal performance on multi-layer boards (θJA = 115°C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage monitor applications.

Compared with TLV809E33DBZR and MAX6315US31D3+T, the MAX6460UT+T uniquely supports wide 4V–28V operation, user-defined trip thresholds via REF and dual inputs, negative rail monitoring, and 28V-tolerant output - making it irreplaceable in high-voltage, field-programmable, or mixed-polarity supervision tasks.

Availability

MAX6460UT+T is available at Aetrix Electronics and suitable for automotive battery management, industrial power sequencing, and telecom shelf supervision requiring stable component supply across extended temperature and high-voltage operating conditions.

Supply support for MAX6460UT+T 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

Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.

The MAX6457–MAX6460 family was engineered specifically for high-voltage, low-quiescent-current voltage monitoring in harsh environments - delivering precision, configurability, and reliability where traditional supervisors fail.

FAQ

What is the maximum voltage the MAX6460UT+T output can tolerate when pulled up externally?

The MAX6460UT+T open-drain output is rated for up to +28V on the pullup node, regardless of VCC level - enabling direct interface with 24V logic or higher-voltage control buses without additional protection circuitry. This rating is explicitly specified in the Absolute Maximum Ratings table and confirmed across all operating temperatures.

Can the MAX6460UT+T monitor negative supply voltages, and how is it configured?

Yes, the MAX6460UT+T supports negative voltage monitoring using the configuration shown in Figure 14 of the datasheet: REF is connected to IN+ via R1, and the negative rail (e.g., -15V) connects to IN− through R2. The trip point is set by R1/R2 ratio relative to the 2.25V reference, and VIN+ remains within its 0–1.4V common-mode range - enabling robust fault detection on bipolar supplies.

Does the MAX6460UT+T include internal hysteresis, and what value is implemented in this variant?

Yes, the MAX6460UT+T includes factory-trimmed internal hysteresis of 0.5% of VTH+, as indicated by the "-T" suffix and confirmed in Table 1 and the Selector Guide. This hysteresis reduces output chatter near the trip threshold in electrically noisy environments and eliminates the need for external positive feedback networks.

What is the guaranteed minimum supply voltage at which the MAX6460UT+T maintains correct output assertion during brownout?

The MAX6460UT+T guarantees correct output assertion (OUT low) down to VCC = 1.5V, per the Electrical Characteristics note stating "OUT remains asserted in the correct undervoltage lockout state for VCC down to 1.5V." This ensures fail-safe behavior during severe input sags, critical for automotive and industrial safety-critical monitoring.

How does the MAX6460UT+T differ from the MAX6459 in terms of output architecture and use case flexibility?

Unlike the MAX6459 - which provides two independent open-drain outputs (OUTA for undervoltage, OUTB for overvoltage) - the MAX6460UT+T has a single output but offers full configurability via separate IN+ and IN− pins plus REF. This allows it to implement undervoltage, overvoltage, window, or differential monitoring with one output, whereas MAX6459 requires both outputs for window detection and cannot reassign them individually.