Analog Devices Inc./Maxim Integrated MAX6460UT-T

Overview

MAX6460UT-T from Maxim Integrated is a high-voltage, low-power single comparator voltage monitor IC with internal 2.25V ±2.5% reference, open-drain n-channel output (28V compliant), 0.5% internal threshold hysteresis, and 50μs timeout period. It operates from 4V to 28V supply, draws only 3.5μA typical at 12V, and supports both positive and negative voltage monitoring via externally accessible inverting/noninverting inputs - used for undervoltage lockout in multicell Li+ battery stacks.

For engineers reviewing the MAX6460UT-T datasheet, MAX6460UT-T pinout, MAX6460UT-T application, or MAX6460UT-T equivalent, this device serves as a precision, high-supply-voltage supervisor requiring minimal external components, stable over –40°C to +125°C, and suitable for automotive-grade power-rail monitoring where noise immunity and wide input range are critical.

Technical Context

The MAX6460UT-T integrates a precision bandgap reference and a single low-offset comparator with externally accessible IN+ and IN– terminals, enabling flexible configuration for active-high or active-low output logic and support for both positive- and negative-voltage monitoring circuits. Its internal 2.25V reference is stable across temperature and can source up to 100µA or sink up to 300nA.

It features fixed 50μs timeout response, 0.5% internal hysteresis (no external hysteresis network required), and undervoltage lockout down to VCC = 1.5V while maintaining correct output assertion state. The open-drain output is rated for 28V pull-up and sinks ≥10mA when asserted.

Key Specifications

Pinout & Package

MAX6460UT-T is housed in a 6-pin SOT23 package (package code U6+1), footprint compatible with standard 6-pin SOT23 land patterns (Maxim land pattern no. 90-0175). The package supports lead(Pb)-free/RoHS compliance and is rated for 696mW continuous power dissipation at +70°C (derated 8.7mW/°C above).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV809E33DBZR and MAX6326UR29+T, the MAX6460UT-T uniquely supports 4V–28V operation, offers an internal 2.25V reference, and enables full trip-point programmability and polarity configuration - making it the only option among the three for high-voltage, adjustable, and bidirectional rail monitoring.

Availability

MAX6460UT-T is available at Aetrix Electronics and suitable for automotive battery management, industrial power sequencing, and multicell Li+ stack supervision requiring stable component supply across extended temperature ranges and long production lifecycles.

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

Maxim Integrated (now part of Analog Devices) designs precision analog and mixed-signal ICs for demanding industrial, automotive, and communications applications.

The MAX6457–MAX6460 family delivers high-voltage, low-quiescent-current voltage monitoring solutions optimized for battery-powered and harsh-environment systems where reliability, wide supply range, and minimal external components are essential.

FAQ

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

The REF pin on the MAX6460UT-T outputs a stable 2.25V ±2.5% internal reference voltage usable for trip-point programming. It can source up to 100µA or sink up to 300nA, remains stable with capacitive loads from 0–50pF or >1µF, and must not be directly connected to IN+ or IN– to avoid violating the 0–1.4V common-mode input range. In the MAX6460UT-T, REF is used with external resistors to set adjustable thresholds for either positive or negative voltage monitoring.

Can the MAX6460UT-T monitor negative voltages?

Yes, the MAX6460UT-T supports negative voltage monitoring using its REF and IN+ pins. A resistor divider connects REF to IN– and the negative rail (VNEG) to IN+ through another resistor (R1), with R2 calculated as R2 = R1 × |VNEG| / 2.25V. This configuration keeps IN+ within the 0–1.4V common-mode range while detecting rail collapse - confirmed in Maxim's Figure 14 and Applications Information section. The MAX6460UT-T is explicitly designed for this use case, unlike the MAX6457/MAX6458/MAX6459 variants.

What is the maximum allowable voltage on the OUT pin of the MAX6460UT-T?

The OUT pin of the MAX6460UT-T is an open-drain n-channel output rated for pull-up voltages up to +28V, as specified in the Absolute Maximum Ratings table. This allows direct interfacing with higher-voltage logic families or gate drives without level-shifting circuitry. However, the output sink current must remain within 20mA absolute maximum, and the voltage on OUT must not exceed VCC + 0.3V when sinking current - though the 28V rating applies specifically when OUT is in high-impedance (non-sinking) state and pulled up externally.

Does the MAX6460UT-T have a latch feature like the MAX6457?

No, the MAX6460UT-T does not include a CLEAR input or latched-output functionality. Unlike the MAX6457UKD_-T series, which uses a digital CLEAR pin to latch overvoltage events, the MAX6460UT-T operates in transparent mode only: OUT asserts low immediately when IN+ falls below IN– and returns high as soon as IN+ exceeds IN– (after the 50μs timeout). This behavior is confirmed in the Pin Description table (no CLEAR pin assigned) and Functional Diagram (Figure 4), and is consistent across all MAX6460 variants listed in Table 1.

What hysteresis and timeout options are available for the MAX6460UT-T?

The MAX6460UT-T is factory-trimmed for 0.5% internal threshold hysteresis and a fixed 50μs timeout period - the only configuration offered for this part number, as indicated in Table 1 and the Ordering Information table (MAX6460UT-T maps to "N/A" for timeout option and "0.5%" for hysteresis). Unlike the MAX6457/MAX6458, it does not offer selectable 150ms timeout or 5%/8.3% hysteresis variants; these options are exclusive to other members of the family.