Analog Devices Inc./Maxim Integrated MAX6759UTWD3+T

Overview

The MAX6759UTWD3+T from Analog Devices is a low-power, single-voltage window detector monitoring 1.8V system supplies with ±15% factory-trimmed thresholds (UVTH = 1.530V, OVTH = 2.070V), 100ms minimum reset timeout, active-low open-drain UV and OV outputs, and manual reset input - used in telecom power sequencing and server voltage supervision.

For engineers reviewing the MAX6759UTWD3+T datasheet, MAX6759UTWD3+T pinout, MAX6759UTWD3+T application, or MAX6759UTWD3+T equivalent, key selection criteria include its 1.8V nominal monitoring capability, ±15% window select via SET pin biasing, -40°C to +125°C operation, 10μA supply current, and SOT23-6 package compatibility with space-constrained embedded power rails.

Technical Context

This device implements dual independent comparators with internal reference and hysteresis (0.7%) to detect undervoltage and overvoltage conditions on a single monitored rail (VCC). Its SET pin accepts VCC/2 bias to configure ±15% window width, and MR input provides active-low manual reset with 300ns propagation delay and 100ms timeout recovery.

The UV and OV outputs are open-drain, enabling wired-OR configurations and level-shifting flexibility. Output assertion is immediate upon threshold violation (20μs typical delay), with no timeout applied to OV - only UV/RESET deassertion follows the D3 timeout period after VCC recovers above UVTH.

Key Specifications

Pinout & Package

MAX6759UTWD3+T is housed in a 6-pin SOT23 package (package code U6+1, outline 21-0058), with thermal resistance θJA = 115°C/W on multi-layer board - suitable for high-density PCB layouts with minimal heatsinking.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6759UTWD0+T and TLV809KDBZR, the MAX6759UTWD3+T uniquely delivers guaranteed 100ms reset hold time, independent UV/OV open-drain outputs, and ±15% window configurability - making it optimal for robust, standards-compliant power supervision where both under- and overvoltage faults must be independently signaled with deterministic timing.

Availability

MAX6759UTWD3+T is available at Aetrix Electronics and suitable for telecom power sequencing, server voltage supervision, and industrial PLC I/O modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX6759UTWD3+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

Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, industrial automation, and communications markets.

The MAX6759UTWD3+T belongs to the MAX6754–MAX6764 family of low-power window detectors designed specifically for reliable, single-rail voltage supervision in space- and power-constrained embedded systems.

FAQ

What is the exact undervoltage and overvoltage threshold range for MAX6759UTWD3+T at +25°C?

The MAX6759UTWD3+T has a nominal 1.8V monitoring rail with ±15% window selected via SET = VCC/2. At +25°C, its UV threshold is 1.530V (typ), ranging from 1.620V (min) to 1.710V (max); OV threshold is 2.070V (typ), ranging from 1.980V (min) to 2.160V (max). These values are factory-trimmed and specified over -40°C to +125°C.

Does MAX6759UTWD3+T support operation below 1.8V supply voltage?

Yes, MAX6759UTWD3+T operates with VCC as low as 1.0V, and its UV/OV outputs remain asserted in the correct logic state down to that level. However, accurate threshold detection requires VCC ≥ 1.4V per datasheet Note 2 - below that, outputs hold last valid state but do not track real-time violations.

How is the ±15% window configured on MAX6759UTWD3+T?

The ±15% window on MAX6759UTWD3+T is configured by biasing the SET pin to VCC/2 using a resistive divider. The device's internal circuitry interprets this midpoint voltage to activate the widest factory-trimmed hysteresis band - unlike connecting SET to GND (±5%) or VCC (±10%). No external components are needed beyond the divider.

What is the function of the MR pin on MAX6759UTWD3+T, and what timing applies?

The MR pin on MAX6759UTWD3+T is an active-low manual reset input that forces UV output assertion regardless of VCC level. After MR rises, UV remains asserted for the full D3 timeout period (100ms min). Propagation delay from MR fall to UV assertion is 300ns max, ensuring rapid fault initiation.

Can MAX6759UTWD3+T monitor dual voltage rails like VCC and VCC2?

No, MAX6759UTWD3+T monitors only a single voltage rail (VCC). It belongs to the MAX6757–MAX6759 subgroup, which is explicitly single-supply. Dual-rail monitoring (VCC + VCC2) is supported only by MAX6760–MAX6762 variants - confirmed by Pin Description table and Functional Diagrams in the datasheet.