Analog Devices Inc./Maxim Integrated MAX6756UKZD3+

Overview

MAX6756UKZD3+ from Maxim Integrated is a single-supply, low-power window voltage detector that monitors 2.5V system supplies with ±15% adjustable threshold window (UVTH = 2.125V, OVTH = 2.875V), features active-low open-drain RESET output, manual reset input (MR), and 100ms minimum timeout period. It operates from -40°C to +125°C and consumes only 13µA typical supply current, making it suitable for power-constrained industrial microcontroller supervision.

For engineers reviewing the MAX6756UKZD3+ datasheet, MAX6756UKZD3+ pinout, MAX6756UKZD3+ application, or MAX6756UKZD3+ equivalent, key selection criteria include its SOT23-5 package, factory-trimmed 2.5V nominal monitoring, ±5%/±10%/±15% window select via SET pin, guaranteed output validity down to VCC = 1.0V, and immunity to short voltage transients.

Technical Context

The MAX6756UKZD3+ implements a precision internal bandgap reference and dual comparators to detect when VCC falls below UVTH or rises above OVTH. Its SET pin configures hysteresis as ±5%, ±10%, or ±15% of nominal VCC - for suffix Z (2.5V), this yields UVTH = 2.375V/2.250V/2.125V and OVTH = 2.625V/2.750V/2.875V depending on SET bias.

It uses a 100ms minimum timeout period (D3 suffix) to prevent false resets during brief supply dips, with propagation delay under 20µs. The open-drain RESET output requires an external pull-up and remains asserted until VCC stabilizes above UVTH for ≥100ms, while MR provides asynchronous reset override with 4µs minimum pulse width and 26kΩ internal pull-up.

Key Specifications

Pinout & Package

MAX6756UKZD3+ is housed in a 5-pin SOT23-5 package (2.9mm × 1.6mm × 1.1mm), with exposed pad internally connected to GND for thermal and EMI performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV809KDBZR and MAX6315US25D3+, the MAX6756UKZD3+ uniquely delivers true window supervision (UV + OV), ±5–15% hysteresis tuning, and open-drain flexibility - critical for systems requiring both overvoltage surge and undervoltage brownout coverage with minimal footprint.

Availability

MAX6756UKZD3+ is available at Aetrix Electronics and suitable for microprocessor supervision, DC-DC converter monitoring, and automotive body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX6756UKZD3+ 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 MAX6754–MAX6764 family was engineered specifically for reliable, low-power voltage supervision in harsh environments - delivering factory-trimmed accuracy, wide temperature operation, and flexible window configurations for modern embedded power systems.

FAQ

What is the exact undervoltage and overvoltage threshold for MAX6756UKZD3+?

The MAX6756UKZD3+ has a nominal 2.5V monitoring point (suffix Z). With SET biased to VCC/2 for ±15% window, UVTH = 2.125V and OVTH = 2.875V at +25°C, with guaranteed operation from -40°C to +125°C. These values are factory-trimmed and do not require external calibration.

Does MAX6756UKZD3+ support overvoltage detection?

Yes, the MAX6756UKZD3+ is a true window detector and supports both undervoltage and overvoltage detection. It asserts the open-drain RESET output when VCC falls below UVTH (e.g., 2.125V) or rises above OVTH (e.g., 2.875V), providing comprehensive rail fault coverage.

What package type and pin count does MAX6756UKZD3+ use?

The MAX6756UKZD3+ uses a 5-pin SOT23-5 package (2.9mm × 1.6mm × 1.1mm) with exposed pad connected to GND. Pinout is VCC, GND, MR, RESET, and SET - fully compatible with standard SOT23 pick-and-place equipment and reflow profiles.

Can MAX6756UKZD3+ operate with supply voltages below 2.5V?

Yes, the MAX6756UKZD3+ guarantees correct RESET output logic state for VCC down to 1.0V, though voltage monitoring functionality requires VCC ≥ 1.4V. This enables safe shutdown sequencing and data retention during deep brownout conditions.

How is the reset timeout period configured on MAX6756UKZD3+?

Timeout is fixed by part number suffix: D3 indicates 100ms minimum reset timeout period. This value is internally set and cannot be adjusted externally. The timeout begins after VCC rises above UVTH and ensures RESET remains asserted long enough for system stabilization.