Analog Devices Inc./Maxim Integrated MAX6460UT

Overview

MAX6460UT from Maxim Integrated is a high-voltage, low-current voltage monitor IC with a single precision comparator, internal 2.25V ±2.5% reference, and externally accessible inverting/noninverting inputs for flexible positive/negative voltage monitoring. It operates from 4V to 28V supply, consumes 3.5µA typical supply current at 12V, features 0.5% internal threshold hysteresis, and delivers a 50µs timeout period - used in undervoltage lockout circuits for multicell Li+ battery stacks and telecom power supplies.

For engineers reviewing the MAX6460UT datasheet, MAX6460UT pinout, MAX6460UT application, or MAX6460UT equivalent, this page provides verified functional identity, confirmed SOT23-6 package mapping, validated terminal roles (including REF, IN+, IN-, OUT), exact hysteresis and timeout specs, and two rigorously cross-checked alternative parts for window detection or latch-enabled monitoring scenarios.

Technical Context

The MAX6460UT implements a single high-impedance comparator with independently accessible IN+ and IN− terminals, enabling both active-high and active-low output configurations. Its internal 2.25V reference (±2.5% over temperature) is stable with capacitive loads up to 50pF or >1µF and can source up to 100µA or sink 300nA.

Unlike the MAX6457/MAX6458, it lacks CLEAR input and extended timeout options, offering only fixed 50µs response. Input common-mode range is 0–1.4V, and the open-drain n-channel output is 28V-compliant with 0.4V max VOL at 1mA sink current across −40°C to +125°C.

Key Specifications

Pinout & Package

MAX6460UT is housed in a 6-pin SOT23 package (outline 21-0058), with pin 1 marked by a dot or beveled edge. All pins are surface-mount compatible and RoHS-compliant when ordered with "+T" suffix.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6457UKD0A-T and MAX6459UTA-T, the MAX6460UT uniquely combines REF output accessibility, dual-input configurability, and absence of latch logic - making it optimal for applications demanding flexible threshold programming without state retention or dual outputs.

Availability

MAX6460UT is available at Aetrix Electronics and suitable for automotive battery management, industrial DC-DC supervision, and telecom power shelf applications requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX6460UT 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, mixed-signal, and power-management ICs for high-reliability industrial, automotive, and communications systems.

The MAX6457–MAX6460 family was engineered specifically for high-voltage, ultra-low-power voltage monitoring in space-constrained SOT23 packages - targeting battery stack supervision, telecom power rails, and harsh-environment power sequencing.

FAQ

What is the function of the REF pin on the MAX6460UT?

The REF pin on the MAX6460UT provides a stable 2.25V ±2.5% internal reference output, usable to set trip thresholds via resistor dividers connected to IN+ or IN−. It sources up to 100µA and sinks up to 300nA, remains stable with capacitive loads from 0–50pF or >1µF, and enables precise, low-component-count voltage monitoring without external references - a core capability distinguishing the MAX6460UT within the MAX6457–MAX6460 family.

Can the MAX6460UT monitor negative voltages?

Yes, the MAX6460UT can monitor negative voltages using its REF pin and dual-input architecture. By connecting the negative rail through a resistor divider to IN+ and referencing IN− to REF, the device compares the scaled negative voltage against the 2.25V reference. The input common-mode range (0–1.4V) is satisfied because the divider shifts the negative potential into that range - a technique explicitly documented in Figure 14 of the MAX6460UT datasheet and validated for use in test equipment and bipolar supply systems.

Does the MAX6460UT support adjustable timeout periods?

No, the MAX6460UT supports only a fixed 50µs timeout period. Unlike the MAX6457 and MAX6458, which offer selectable 50µs or 150ms options via part-number suffixes, the MAX6460UT is factory-trimmed exclusively for 50µs response. This fixed timing is optimized for fast fault detection in transient-sensitive applications and eliminates ambiguity in timing selection - confirmed in Table 1 (Selector Guide) and the "Ordering Information" section of the MAX6460UT datasheet.

What is the maximum sink current capability of the MAX6460UT's OUT pin?

The MAX6460UT's OUT pin is an open-drain n-channel output rated for a minimum sink current of 10mA at VCC ≥ 4.0V and TA = −40°C to +125°C, with VOL ≤ 0.4V. Typical short-circuit sink current reaches 12–15mA depending on temperature and supply voltage, as shown in Figure toc06 of the datasheet. This capability allows direct driving of optocouplers, MOSFET gates, or logic inputs without external buffers - a key design advantage for compact power-supply supervision circuits.

Is the MAX6460UT pin-compatible with other devices in the MAX6457–MAX6460 family?

No, the MAX6460UT is not pin-compatible with MAX6457 or MAX6458 (both 5-pin SOT23), nor with MAX6459 (6-pin SOT23 but different pinout). The MAX6460UT uses a unique 6-pin assignment: Pin 1 = OUT, Pin 2 = GND, Pin 3 = IN−, Pin 4 = IN+, Pin 5 = REF, Pin 6 = VCC. In contrast, MAX6459 places OUTA/OUTB on Pins 5/6 and omits REF - making PCB layout incompatible without redesign. This distinction is clearly shown in the "Pin Configurations" section (page 13) of the MAX6460UT datasheet.