Analog Devices Inc./Maxim Integrated MAX6757UTWD3+T

Overview

MAX6757UTWD3+T from Analog Devices is a low-power, single-supply window voltage detector with independent undervoltage (UV) and overvoltage (OV) open-drain outputs, factory-trimmed 3.3V nominal monitoring threshold, ±15% selectable window (SET = VCC/2), 100ms minimum reset timeout (D3 suffix), and manual reset input (MR). It operates from 1.0V to 6.0V supply and supports automotive-grade temperature range (–40°C to +125°C), used in DC-DC converter modules for rail integrity supervision.

For engineers reviewing the MAX6757UTWD3+T datasheet, MAX6757UTWD3+T pinout, MAX6757UTWD3+T application, or MAX6757UTWD3+T equivalent, key selection criteria include independent UV/OV assertion timing, SET-configurable window width, MR-triggered system reset capability, and compatibility with noisy power rails requiring transient immunity.

Technical Context

The MAX6757UTWD3+T implements dual comparators with internal reference and hysteresis (0.7%) to detect VCC falling below UVTH or rising above OVTH. Its SET pin selects ±5%/±10%/±15% window via resistor divider biasing, and the D3 timeout option provides 100–320ms deassertion delay after fault clearance.

It features active-low open-drain UV and OV outputs with 0.3V VOL at ≥1.98V VCC and ISINK ≥1.4mA, MR input with 26kΩ internal pullup and 4µs minimum pulse width, and guaranteed output validity down to VCC = 1.0V - enabling brownout detection even during deep supply sag.

Key Specifications

Pinout & Package

MAX6757UTWD3+T is housed in a 6-pin SOT23 package (package code U6+1, outline 21-0058), with thermal resistance θJA = 115°C/W on multilayer board.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6757UTTD3+T and TLV809E33DBZR, the MAX6757UTWD3+T uniquely delivers ±15% window flexibility and independent UV/OV outputs - critical for systems requiring differentiated fault response and wide tolerance margins in harsh environments.

Availability

MAX6757UTWD3+T is available at Aetrix Electronics and suitable for telecom power supervision, server PSU monitoring, automotive ADAS domain controllers, and industrial PLC I/O modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX6757UTWD3+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, communications, and automotive markets.

The MAX6757UTWD3+T belongs to the MAX6754–MAX6764 family of low-power window detectors, designed specifically for reliable power-rail supervision in space-constrained, thermally demanding applications where independent fault signaling and configurable thresholds are essential.

FAQ

What is the exact undervoltage and overvoltage threshold range for MAX6757UTWD3+T at 25°C?

At TA = +25°C, the MAX6757UTWD3+T has UVTH = 2.888V (typ) and OVTH = 3.878V (typ) for its 3.3V nominal rail with ±15% window (SET = VCC/2). Over –40°C to +125°C, UVTH spans 2.805V to 3.135V and OVTH spans 3.795V to 3.96V, per datasheet Table 1 and Electrical Characteristics.

Does MAX6757UTWD3+T support operation below 1.4V VCC?

Yes, the MAX6757UTWD3+T guarantees correct output logic state down to VCC = 1.0V, though voltage monitoring functionality requires VCC ≥ 1.4V per datasheet Note 2. This enables brownout detection during deep supply sag while maintaining asserted fault signals.

How is the ±15% window configured on MAX6757UTWD3+T?

The ±15% window on MAX6757UTWD3+T is configured by biasing the SET pin to VCC/2 using a resistor divider (e.g., two matched resistors from VCC to GND). Connecting SET directly to GND gives ±5%; to VCC gives ±10%. The device's internal comparator references this bias to scale UVTH and OVTH proportionally.

What is the function of the MR pin on MAX6757UTWD3+T?

The MR pin on MAX6757UTWD3+T is an active-low manual reset input. Pulling MR low forces immediate assertion of both UV and OV outputs regardless of VCC level. After MR returns high, outputs remain asserted for the propagation delay (300ns) plus the D3 timeout period (100–320ms), enabling firmware-controlled system reset.

Can MAX6757UTWD3+T be used in automotive applications?

Yes, the MAX6757UTWD3+T is specified for –40°C to +125°C operation and belongs to the MAX6754–MAX6764 family where /V suffix parts are AEC-Q100 qualified. While MAX6757UTWD3+T itself carries no /V suffix, its electrical and thermal specs meet automotive environmental requirements for non-safety-critical power supervision tasks.