Analog Devices Inc./Maxim Integrated MAX6754UKZD3

Overview

The MAX6754UKZD3 from Maxim Integrated is a low-power, single-voltage window detector that monitors undervoltage and overvoltage conditions on 1.8V system supplies with ±5% threshold window, 100ms minimum reset timeout, and active-low push-pull RESET output in a 5-pin SOT23 package. It asserts RESET when VCC falls below 1.62V or rises above 1.98V, supporting microprocessor supervision in automotive and industrial power management.

For engineers reviewing the MAX6754UKZD3 datasheet, MAX6754UKZD3 pinout, MAX6754UKZD3 application, or MAX6754UKZD3 equivalent, key selection criteria include its factory-trimmed 1.8V monitoring, manual reset input (MR), -40°C to +125°C operation, 10µA supply current, and compatibility with noisy DC-DC converter outputs requiring transient-immune voltage supervision.

Technical Context

The MAX6754UKZD3 implements a fixed-threshold window detection architecture with internal precision voltage dividers setting nominal UVTH = 1.8V × 0.9 = 1.62V and OVTH = 1.8V × 1.1 = 1.98V at TA = +25°C. Its SET pin is tied to GND to configure the ±5% window hysteresis (VHYST = 0.7%).

It features a 100ms minimum reset timeout period (D3 suffix), active-low push-pull RESET output with VOL ≤ 0.3V at ISINK = 4.0mA (VCC ≥ 4.75V), and MR input with 26kΩ internal pullup. Outputs remain valid down to VCC = 1.0V, enabling brownout detection during deep power-down sequences.

Key Specifications

Pinout & Package

Package: 5-pin SOT23-5, surface-mount, lead-free compatible, exposed pad not present.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6315US29D3+ and TLV809E29DBZR, the MAX6754UKZD3 uniquely provides combined UV/OV window detection at 1.8V with ±5% hysteresis, manual reset, and guaranteed operation down to 1.0V - making it irreplaceable for full-window supervision in 1.8V systems.

Availability

MAX6754UKZD3 is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O modules, and energy metering systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX6754UKZD3 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 management, sensing, and interface applications in demanding environments.

The MAX6754UKZD3 belongs to the MAX6754–MAX6764 family of low-power window detectors engineered specifically for robust, factory-trimmed voltage supervision in automotive, industrial, and computing systems with stringent reliability requirements.

FAQ

What is the exact undervoltage and overvoltage threshold range for MAX6754UKZD3 over temperature?

The MAX6754UKZD3 has a factory-trimmed 1.8V nominal supply with ±5% window. Its undervoltage threshold (UVTH) ranges from 1.62V to 1.71V, and overvoltage threshold (OVTH) from 1.89V to 1.98V, across the full -40°C to +125°C operating range. These values are specified in the Electrical Characteristics table under "VCC Undervoltage Threshold" and "VCC Overvoltage Threshold" with suffix W (1.8V) and SET = GND.

Does MAX6754UKZD3 require external components to set its voltage thresholds?

No, the MAX6754UKZD3 does not require external components to set its voltage thresholds. As a factory-trimmed device with suffix W (1.8V) and D3 (100ms timeout), its UVTH and OVTH are laser-adjusted during production. The SET pin is internally configured to GND for ±5% hysteresis, eliminating any external resistors or capacitors for basic operation.

What is the function of the MR pin on MAX6754UKZD3, and how is it biased?

The MR (Manual Reset) pin on MAX6754UKZD3 is an active-low input that forces the RESET output low regardless of VCC level. It is internally pulled up to VCC through a 26kΩ resistor. Driving MR low for ≥4µs asserts RESET; the output remains asserted for the full 100ms timeout period after MR returns high, ensuring deterministic reset behavior during firmware-controlled diagnostics.

Can MAX6754UKZD3 operate correctly if VCC drops below 1.8V during brownout?

Yes, the MAX6754UKZD3 maintains correct RESET output logic state down to VCC = 1.0V, per the datasheet specification. Even when VCC falls below 1.8V (e.g., to 1.2V during brownout), the device continues asserting RESET as long as VCC remains outside the 1.62V–1.98V window, and the output remains valid - enabling reliable low-voltage supervision critical for fail-safe system behavior.

Is MAX6754UKZD3 pin-compatible with other devices in the MAX6754–MAX6764 family?

No, MAX6754UKZD3 is not universally pin-compatible across the MAX6754–MAX6764 family. It uses a 5-pin SOT23-5 package (pins: VCC, GND, MR, RESET, SET). In contrast, MAX6757–MAX6759 use 6-pin SOT23-6 (adding UV), and MAX6760–MAX6762 use 8-pin TDFN (adding VCC2, OVLATCH, etc.). Pin compatibility exists only within the MAX6754/MAX6755/MAX6756 subgroup sharing the same 5-pin footprint.