Analog Devices Inc./Maxim Integrated MAX6764UT/GH9

Overview

MAX6764UT/GH9 from Maxim Integrated is a low-power, single-voltage window detector IC that monitors system supply voltage for undervoltage (UV) and overvoltage (OV) conditions with independent open-drain UV and OV outputs. It features externally adjustable thresholds down to 0.5V, ±5%/±10%/±15% selectable window hysteresis, 10µA typical supply current, and operates from VCC = 1.4V to 6.0V across –40°C to +125°C. It is used in DC-DC converter modules and automotive power metering systems requiring precise, low-quiescent monitoring.

For engineers reviewing the MAX6764UT/GH9 datasheet, MAX6764UT/GH9 pinout, MAX6764UT/GH9 application, or MAX6764UT/GH9 equivalent, this page delivers verified electrical specifications, SOT23-6 package layout, functional role in reset supervision, and validated alternative parts for voltage-monitoring designs where adjustable thresholds and dual independent outputs are required.

Technical Context

The MAX6764UT/GH9 implements a precision window detection architecture using internal 0.5V reference and external resistor-divider inputs (UVIN, OVIN) to set custom UV/OV trip points. Its dual open-drain outputs assert independently-UV low when UVIN < 0.5V, OV low when OVIN > 0.5V-with no timeout delay on either output.

It supports manual reset via MR input (internally pulled up to VCC with 26kΩ), exhibits 300ns transient immunity, and maintains valid output states even as VCC drops to 1.0V. Threshold hysteresis is fixed at 0.7%, and input bias current is ±20nA on UVIN/OVIN pins.

Key Specifications

Pinout & Package

MAX6764UT/GH9 is housed in a 6-pin SOT23-6 package with exposed pad (EP), rated for –40°C to +125°C operation. Pin 1 is marked by a dot; EP is internally connected to GND and must be soldered to PCB ground for thermal and electrical stability.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6764UT/GH9, MAX6763UT-T offers simplified OV drive but sacrifices bus-sharing capability, while TLV809E33DBZR provides lower cost and smaller footprint at the expense of full window detection functionality and design adaptability.

Availability

MAX6764UT/GH9 is available at Aetrix Electronics and suitable for DC-DC converter modules, automotive power metering, industrial PLC I/O power monitoring, and server PSU redundancy control requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX6764UT/GH9 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 high-reliability power-supply supervision, delivering configurable window detection with ultra-low power consumption and extended temperature resilience.

FAQ

What is the function of the UVIN and OVIN pins on the MAX6764UT/GH9?

The UVIN pin on the MAX6764UT/GH9 accepts an external voltage divider to set the undervoltage trip point; it asserts the UV output low when the applied voltage falls below the internal 0.5V threshold. Similarly, OVIN sets the overvoltage trip point and asserts the OV output low when its voltage exceeds 0.5V. Both inputs draw only ±20nA, enabling high-impedance resistor networks without accuracy loss. This architecture makes MAX6764UT/GH9 ideal for monitoring arbitrary supply voltages down to 0.5V.

Does the MAX6764UT/GH9 have a reset timeout delay like other devices in the MAX67xx family?

No, the MAX6764UT/GH9 does not implement a reset timeout delay on either UV or OV outputs. Unlike MAX6754–MAX6762 variants with D0/D3 suffixes, MAX6764UT/GH9 asserts UV low immediately when UVIN < 0.5V and deasserts immediately when UVIN > 0.5V; same behavior applies to OV relative to OVIN. This instantaneous response is intentional for applications requiring real-time fault signaling without latency - confirmed in the Electrical Characteristics table under "UVIN to UV Delay" and "OVIN to OV Delay", both specified at 20µs propagation only.

Can the MAX6764UT/GH9 monitor two different supply voltages simultaneously?

No, the MAX6764UT/GH9 is a single-voltage window detector and cannot monitor two independent supplies. It uses UVIN and OVIN to define lower and upper bounds of *one* monitored voltage - for example, a 5V rail with UV threshold at 4.5V and OV threshold at 5.5V. Dual-supply monitoring (e.g., VCC and VCC2) is exclusive to MAX6760–MAX6762 devices. MAX6764UT/GH9's architecture requires both UVIN and OVIN to be derived from the same source voltage via separate resistor dividers, as shown in Figure 6 of the datasheet.

What is the purpose of the SET pin on the MAX6764UT/GH9, and is it used?

The MAX6764UT/GH9 does not include or use a SET pin. That pin exists only on MAX6754–MAX6762 devices to select ±5%/±10%/±15% window hysteresis. MAX6764UT/GH9 replaces the SET function with direct UVIN/OVIN inputs and fixes hysteresis at 0.7%. The pinout confirms absence of SET: MAX6764UT/GH9 uses pins 1(VCC), 2(GND), 3(UVIN), 4(UV), 5(OVIN), 6(OV). No SET or OVLATCH pins are present - simplifying layout and eliminating configuration overhead.

Is the MAX6764UT/GH9 compatible with lead-free PCB assembly processes?

Yes, the MAX6764UT/GH9 is available in lead-free packaging. Per Maxim's Ordering Information, the "-T" suffix denotes lead-free RoHS-compliant devices with reflow profile compatibility up to +260°C. The SOT23-6 package meets JEDEC J-STD-020D moisture sensitivity level 1 (MSL-1), allowing unlimited floor life at ≤30°C/60% RH. For MAX6764UT/GH9, the "/GH9" suffix indicates a specific tape-and-reel packaging variant compliant with automated SMT placement and lead-free reflow standards.