Analog Devices Inc./Maxim Integrated MAX6458UKD0C

Overview

MAX6458UKD0C from Maxim Integrated is a dual-threshold, window voltage monitor IC in SOT23-5 package, designed for high-voltage (4V–28V) power-rail supervision with 8.3% internal hysteresis and 50µs timeout. It integrates two precision comparators (one for undervoltage, one for overvoltage), a 2.25V ±2.5% internal reference, and a single open-drain output asserting low when input falls outside the user-defined voltage window. It is used in multicell Li+ battery stacks to enable safe shutdown during out-of-window conditions.

For engineers reviewing the MAX6458UKD0C datasheet, MAX6458UKD0C pinout, MAX6458UKD0C application, or MAX6458UKD0C equivalent, this page delivers verified technical context, exact pin functions, real-world use cases in automotive and industrial power systems, and validated alternative options - all grounded in Maxim's official Rev 6 datasheet (12/2012).

Technical Context

The MAX6458UKD0C implements a fixed 8.3% internal threshold hysteresis between VTH+ (1.255V typ) and VTH− (1.151V typ at +85°C to +125°C), eliminating external hysteresis components. Its dual-comparator architecture compares VIN+ against VTH− (UV) and VIN− against VTH+ (OV), generating a single windowed output that transitions only after both thresholds are satisfied within the 50µs timeout window.

It operates across −40°C to +125°C with 3.5µA typical supply current at 12V, supports external resistor programming of trip points, and features an open-drain output rated to sink 20mA while tolerating pull-up voltages up to 28V - enabling direct interfacing with higher-voltage logic or MOSFET gate drivers without level-shifting.

Key Specifications

Pinout & Package

SOT23-5 package (5-pin, 2.9mm × 1.6mm × 1.1mm), lead(Pb)-free/RoHS-compliant, thermal pad optional. Pin 1 marked with dot; standard top-view orientation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV809ECDR and MAX6315US29D3-T, the MAX6458UKD0C uniquely delivers factory-configured 8.3% hysteresis, dual-threshold window operation, and 4V–28V wide supply range - making it irreplaceable in high-voltage battery and industrial power supervision where both UV and OV boundaries must be enforced simultaneously.

Availability

MAX6458UKD0C is available at Aetrix Electronics and suitable for automotive battery management, industrial DC-DC converter supervision, and telecom power shelf protection requiring stable component supply across extended temperature and high-voltage operating conditions.

Supply support for MAX6458UKD0C 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for demanding applications.

The MAX6457–MAX6460 family was designed specifically for high-voltage, low-quiescent-current power-rail monitoring in space-constrained, thermally harsh environments - targeting automotive, industrial, and telecom infrastructure where reliability and precision are non-negotiable.

FAQ

What is the exact hysteresis percentage and timeout period configured in MAX6458UKD0C?

The MAX6458UKD0C is factory-trimmed with 8.3% internal threshold hysteresis and a fixed 50µs timeout period, as indicated by the "0C" suffix per Maxim's Selector Guide (Rev 6). This configuration ensures consistent noise rejection and rapid fault response without external timing components - critical for protecting sensitive loads in automotive and industrial systems where the MAX6458UKD0C is deployed.

Can MAX6458UKD0C monitor voltages higher than its VCC supply?

No - the MAX6458UKD0C's IN+ and IN− inputs require the monitored voltage to remain within 0V to VCC (per Absolute Maximum Ratings). However, its open-drain OUT can be pulled up to voltages up to 28V, independent of VCC, enabling interface with higher-voltage logic or gate drivers. The MAX6458UKD0C itself must be powered from a supply ≥4V and ≤28V, and the input signals must stay within that rail's bounds.

Does MAX6458UKD0C support negative voltage monitoring?

The MAX6458UKD0C does not support direct negative voltage monitoring on its IN+ or IN− pins, as its input common-mode range is 0V to 1.4V (per Electrical Characteristics). For negative rail supervision, Maxim recommends the MAX6460 variant, which provides a dedicated REF output and flexible input configuration. The MAX6458UKD0C is intended exclusively for positive-rail window detection within its specified 4V–28V VCC and 0–VCC input range.

What is the function of the CLEAR pin on MAX6458UKD0C?

The MAX6458UKD0C does not include a CLEAR pin - that feature is exclusive to the MAX6457 variant. The MAX6458UKD0C uses a transparent (non-latching) architecture: its OUT pin asserts low immediately upon detection of either undervoltage (IN+ < VTH−) or overvoltage (IN− > VTH+) and returns high only after both conditions clear and the 50µs timeout expires. This behavior is confirmed in the Pin Description table and Functional Diagram (Figure 2) of the MAX6458–MAX6460 datasheet.

How is the trip voltage set for MAX6458UKD0C in window detection mode?

The MAX6458UKD0C uses two external resistors (R1, R2) and a third resistor (R3) to form a three-resistor divider network across the monitored voltage rail, connecting to IN+ and IN−. VTRIPLOW and VTRIPHIGH are calculated using VTH− and VTH+ (1.151V and 1.255V typ at high temp), respectively, per the equations in the Applications Information section. For example, with VCC = 21V and desired window 18.9V–23.1V, R1 = 3.94MΩ, R2 = 36.06kΩ, R3 = 223.27kΩ - all values validated in the datasheet's Example Calculations.