Analog Devices Inc./Maxim Integrated MAX6712TEXS

Overview

MAX6712TEXS from Maxim Integrated is a precision microprocessor supervisory circuit with active-high push-pull RESET output, designed to monitor +3.3V power supplies in embedded systems. It asserts reset when VCC falls below 2.93V (±1.5% over temperature), guarantees ≥140ms reset timeout after power-up or manual reset deassertion, and operates down to VCC = +1V while consuming only 12µA typical supply current. It is used in portable instrumentation and automotive control modules requiring reliable brownout detection.

For engineers reviewing the MAX6712TEXS datasheet, MAX6712TEXS pinout, MAX6712TEXS application, or MAX6712TEXS equivalent, key selection considerations include its active-high reset logic, 2.93V threshold optimized for +3.3V rails, SC70-4 package footprint, manual reset input with internal 20kΩ pull-up, and guaranteed operation across –40°C to +125°C.

Technical Context

The MAX6712TEXS implements a precision bandgap-based voltage comparator with hysteresis to detect VCC drops below its factory-trimmed 2.93V threshold. Its reset assertion timing is governed by an internal RC timer ensuring ≥140ms minimum pulse width after VCC recovery or MR release.

It features a debounced manual reset input (MR) with 100ns glitch immunity and 200ns MR-to-reset delay, and its push-pull output drives high to VCC with VOH ≥ 0.8·VCC at 800µA source current, enabling direct interface to CMOS µP reset inputs without external pull-ups.

Key Specifications

Pinout & Package

MAX6712TEXS is housed in a 4-pin SC70-4 package (2.0mm × 2.1mm × 0.9mm), compatible with standard reflow profiles and suitable for space-constrained PCB layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microprocessor supervisory applications.

Compared with MAX6712TEXS, MAX6712TES offers identical performance in smaller reel quantities, while TLV803EB33DBZR trades manual reset and push-pull drive for lower quiescent current and smaller footprint - making it viable only in simplified reset-only applications without user intervention needs.

Availability

MAX6712TEXS is available at Aetrix Electronics and suitable for industrial control, automotive electronics, and portable medical devices requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX6712TEXS 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 computing applications, with emphasis on reliability and integration.

The MAX671x family delivers highly accurate, low-power supervisory circuits for microprocessor power monitoring - engineered specifically for robust operation in harsh environments with wide temperature and supply voltage variation.

FAQ

What is the exact reset threshold voltage of the MAX6712TEXS and how stable is it over temperature?

The MAX6712TEXS has a factory-trimmed reset threshold of 2.93V with ±1.5% tolerance over the full –40°C to +125°C operating range. Its temperature coefficient is ≤50ppm/°C, meaning threshold drift is less than 15mV across the entire temperature span - sufficient for precise alignment with +3.3V supply brownout margins defined in industrial standards.

Does the MAX6712TEXS require external components for basic operation?

No, the MAX6712TEXS requires no external components for core supervision functionality. Its internal 20kΩ pull-up on the MR pin allows direct switch-to-ground connection, and its active-high push-pull RESET output eliminates the need for an external pull-up resistor - reducing BOM count and PCB area versus open-drain alternatives like the MAX6713 series.

How does the MAX6712TEXS behave when VCC drops below 1V?

The MAX6712TEXS guarantees correct RESET logic state down to VCC = +1V. Below that, the output enters high-impedance state and is no longer actively driven. However, due to its push-pull architecture, RESET remains latched in its last valid state (high) until VCC recovers - unlike open-drain variants that float. This avoids undefined logic levels during deep brownout.

Can the MAX6712TEXS be used with a +2.5V supply rail?

Yes, the MAX6712TEXS operates with VCC from +1.0V to +5.5V, so it functions with +2.5V supplies. However, its 2.93V reset threshold exceeds +2.5V nominal - meaning it will assert reset continuously. For +2.5V systems, use MAX6712ZEXS (2.32V threshold) instead; the "T" suffix in MAX6712TEXS explicitly denotes the 2.93V variant for +3.3V rails.

What is the minimum pulse width required on the MR pin to trigger a valid reset?

The MR input requires a minimum low pulse width of 100ns to register as a valid reset request. This specification ensures immunity to digital noise and contact bounce. The device also provides 200ns propagation delay from MR deassertion to RESET deassertion, guaranteeing clean synchronization between manual reset release and µP startup sequence.