Analog Devices Inc./Maxim Integrated MAX6759UTWD0+T

Overview

MAX6759UTWD0+T from Analog Devices is a low-power, single-voltage window detector that monitors 1.8V system supplies with ±15% factory-trimmed undervoltage/overvoltage thresholds (UVTH = 1.530V, OVTH = 2.070V), features independent open-drain UV and OV outputs, 20μs propagation delay, manual reset input, and operates from -40°C to +125°C in a 6-pin SOT23 package. It is used in telecom power supervision and DC-DC converter module fault detection.

For engineers reviewing the MAX6759UTWD0+T datasheet, MAX6759UTWD0+T pinout, MAX6759UTWD0+T application, or MAX6759UTWD0+T equivalent, key selection criteria include its 1.8V nominal monitoring capability with ±15% window, independent UV/OV open-drain outputs, 20μs fast response, MR input for system-initiated reset, and AEC-Q100-qualified operation up to +125°C.

Technical Context

The MAX6759UTWD0+T implements dual independent comparators with internal precision reference and hysteresis (0.7%) to detect voltage excursions outside its fixed 1.8V window. Its SET pin is biased to VCC/2 to configure the ±15% threshold spread, and it asserts UV when VCC falls below 1.530V and OV when VCC rises above 2.070V.

It uses a manual reset (MR) input with 4μs minimum pulse width and 300ns propagation delay to force UV/OV assertion independently of supply conditions. Outputs are open-drain, requiring external pull-ups, and remain valid down to VCC = 1.0V despite requiring ≥1.4V for accurate monitoring.

Key Specifications

Pinout & Package

MAX6759UTWD0+T is housed in a 6-pin SOT23 package (package code U6+1, outline 21-0058), with exposed pad not present. Pin 1 is VCC, Pin 2 is GND, Pin 3 is MR, Pin 4 is UV, Pin 5 is OV, and Pin 6 is SET. All pins support absolute maximum ratings up to VCC + 0.3V (except VCC itself, rated to +6.5V).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6758UTWD0+T and TLV809E18DBZR, the MAX6759UTWD0+T uniquely delivers independent open-drain UV/OV outputs with manual reset and ±15% window tuning-enabling full window fault isolation in space-constrained, high-reliability 1.8V systems.

Availability

MAX6759UTWD0+T is available at Aetrix Electronics and suitable for telecom power supervision, DC-DC converter module monitoring, automotive body control modules, and industrial PLC I/O expansion requiring stable component supply across extended temperature ranges.

Supply support for MAX6759UTWD0+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 industrial, automotive, communications, and healthcare markets.

The MAX6759UTWD0+T belongs to the MAX6754–MAX6764 family of low-power window detectors, designed specifically for reliable voltage supervision in harsh-environment embedded systems with tight power and space constraints.

FAQ

What is the exact undervoltage and overvoltage threshold for MAX6759UTWD0+T at room temperature?

The MAX6759UTWD0+T has a nominal 1.8V monitoring target with ±15% window. At TA = +25°C, its undervoltage threshold (UVTH) is 1.530V and overvoltage threshold (OVTH) is 2.070V. These values are factory-trimmed and guaranteed across -40°C to +125°C, with typical hysteresis of 0.7% to prevent chatter near trip points. The MAX6759UTWD0+T uses internal precision references to maintain accuracy without external components.

Does MAX6759UTWD0+T support both undervoltage and overvoltage detection simultaneously?

Yes, the MAX6759UTWD0+T provides simultaneous and independent undervoltage and overvoltage detection using two dedicated comparators. It asserts the open-drain UV pin when VCC falls below 1.530V and the open-drain OV pin when VCC rises above 2.070V-both with 20μs propagation delay and no timeout delay. This dual-flag architecture allows differentiated system responses, such as initiating graceful shutdown on UV while triggering hardware protection on OV. The MAX6759UTWD0+T does not combine these into a single output.

What is the function of the SET pin on MAX6759UTWD0+T, and how should it be connected?

The SET pin on MAX6759UTWD0+T selects the window tolerance: connect to GND for ±5%, to VCC for ±10%, or bias to VCC/2 for ±15%. For the MAX6759UTWD0+T (suffix 'W' = 1.8V, 'D0' = 20μs delay), SET must be biased to VCC/2-typically using a resistor divider-to achieve the specified ±15% window (1.530V/2.070V). Incorrect SET biasing will shift thresholds outside datasheet guarantees. The MAX6759UTWD0+T's SET input draws less than ±1μA, minimizing divider current.

Can MAX6759UTWD0+T operate with supply voltages below 1.8V?

Yes, the MAX6759UTWD0+T functions with VCC as low as 1.0V, though accurate voltage monitoring requires VCC ≥ 1.4V per datasheet Note 2. Below 1.4V, the internal reference and comparators may not track the 1.8V nominal window precisely-but UV and OV outputs remain asserted in their correct logic state (low when faulted) down to 1.0V. This ensures fail-safe behavior during deep brownout. The MAX6759UTWD0+T's 13–30μA supply current remains stable across this range.

Is MAX6759UTWD0+T qualified for automotive applications?

The MAX6759UTWD0+T is not explicitly AEC-Q100 qualified; only /V suffix variants (e.g., MAX6759UTWD0/V+) carry AEC-Q100 qualification. However, the MAX6759UTWD0+T is specified for -40°C to +125°C operation, uses automotive-grade process technology, and shares the same reliability testing foundation. For production automotive use, designers must verify qualification status via Analog Devices' official documentation and select /V parts where mandated. The MAX6759UTWD0+T remains suitable for industrial and telecom applications requiring extended temperature performance.