Analog Devices Inc./Maxim Integrated MAX6755UKRD0

Overview

MAX6755UKRD0 from Maxim Integrated is a low-power, single-voltage window detector IC that monitors system supply voltage (VCC) for undervoltage and overvoltage conditions and asserts a single active-high push-pull RESET output. It features factory-trimmed 3.3V nominal threshold (±15% window via SET pin), 100ms minimum reset timeout, and operates from 1.0V to 6.0V supply with 10µA quiescent current. It is used in microprocessor power supervision for servers and telecom equipment.

For engineers reviewing the MAX6755UKRD0 datasheet, MAX6755UKRD0 pinout, MAX6755UKRD0 application, or MAX6755UKRD0 equivalent, key selection criteria include its fixed 3.3V monitoring range, ±15% adjustable window, 100ms reset timeout, manual reset input (MR), and operation across –40°C to +125°C in SOT23-5 packaging.

Technical Context

The MAX6755UKRD0 implements dual comparators with internal reference and hysteresis (0.7%) to detect VCC crossing UVTH (falling) or OVTH (rising). Its SET pin configures the window as ±15% by biasing to VCC/2, enabling precise tolerance selection without external components.

It integrates a 100ms minimum timeout circuit triggered on UV/OV assertion, ensuring stable reset hold time during supply recovery. The active-high push-pull RESET output drives directly into µP reset inputs without pull-up, and MR provides synchronous manual reset with 26kΩ internal pull-up.

Key Specifications

Pinout & Package

MAX6755UKRD0 is housed in a 5-pin SOT23-5 package with exposed pad (EP) internally connected to GND. Pin 1 is VCC (power input and monitored voltage), Pin 2 is GND, Pin 3 is MR (active-low manual reset), Pin 4 is RESET (active-high push-pull output), and Pin 5 is SET (threshold window select).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6754UKRD0, the MAX6755UKRD0 simplifies µP interface by eliminating external pull-up needs; versus TLV809K33DBZR, it delivers complete window supervision in one device, reducing component count and failure modes.

Availability

MAX6755UKRD0 is available at Aetrix Electronics and suitable for microprocessor supervision, industrial DC-DC converter monitoring, and telecom line card voltage monitoring requiring stable component supply across extended temperature ranges.

Supply support for MAX6755UKRD0 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 power, sensing, and connectivity applications.

The MAX6754–MAX6764 family was engineered for high-reliability power supply supervision in space-constrained, thermally demanding systems-emphasizing low quiescent current, wide temperature operation, and flexible window configuration.

FAQ

What is the exact undervoltage and overvoltage threshold for MAX6755UKRD0?

The MAX6755UKRD0 has a factory-trimmed nominal VCC threshold of 3.3V. With SET biased to VCC/2 for ±15% window, UVTH = 2.805V (min) and OVTH = 3.795V (max) over –40°C to +125°C. These values are specified in the Electrical Characteristics table under "T, 3.3V" row with SET = VCC/2 condition.

Does MAX6755UKRD0 support dual-voltage monitoring?

No, MAX6755UKRD0 is a single-voltage window detector monitoring only VCC. Dual-voltage variants (e.g., MAX6760–MAX6762) include VCC2 pin and separate UV/OV outputs; MAX6755UKRD0 lacks VCC2, OVLATCH, and independent UV/OV pins.

What is the function of the SET pin on MAX6755UKRD0?

The SET pin on MAX6755UKRD0 selects the window tolerance: connect to GND for ±5%, to VCC for ±10%, or bias to VCC/2 (e.g., via resistor divider) for ±15%. For MAX6755UKRD0, the "R" suffix indicates ±15% configuration, so SET must be biased to VCC/2 for correct operation.

Can MAX6755UKRD0 operate with VCC below 1.4V?

Yes - MAX6755UKRD0 functions with VCC down to 1.0V. While voltage monitoring accuracy requires VCC ≥ 1.4V (per Note 2), RESET output remains asserted in correct logic state (high during UV/OV) even at 1.0V, enabling fail-safe behavior during deep brownout.

Is the RESET output of MAX6755UKRD0 compatible with 1.8V logic systems?

Yes - the active-high push-pull RESET output of MAX6755UKRD0 reaches VOH ≥ 0.8 × VCC across its 1.0V–6.0V supply range. At VCC = 1.8V, VOH ≥ 1.44V, which exceeds the VIH minimum (typically 1.17V) for standard 1.8V CMOS inputs, ensuring robust interfacing.