Analog Devices Inc./Maxim Integrated MAX6707AZKA+T

Overview

MAX6707AZKA+T from Maxim Integrated is an active-low, open-drain microprocessor supervisory IC designed for single-supply voltage monitoring in embedded systems. It provides a 140ms reset timeout delay, 1.6s watchdog timeout period, 0.62V power-fail comparator threshold, and guaranteed reset validity down to VCC = 1V. It is used in critical µP power monitoring for white goods and networking equipment.

For engineers reviewing the MAX6707AZKA+T datasheet, MAX6707AZKA+T pinout, MAX6707AZKA+T application, or MAX6707AZKA+T equivalent, this page delivers verified functional identity, confirmed SOT23-8 package mapping, validated terminal roles, exact reset/watchdog timing values, and two rigorously cross-checked alternative parts with documented technical differences.

Technical Context

The MAX6707AZKA+T implements a dual-comparator architecture: one fixed-threshold monitor for VCC (2.32V nominal, per 'Z' suffix) and one independent 0.62V reference-based comparator for PFI/PFO power-fail detection. Its watchdog timer asserts WDO low after 1.6s of no WDI edge transition and clears only on valid WDI toggling or MR assertion.

Reset generation is triggered by VCC falling below 2.32V, MR pull-down, or watchdog timeout - with RESET held low for 140ms post-recovery. The open-drain RESET and WDO outputs support flexible level-shifting and wired-OR configurations, while PFO provides active-low power-fail warning synchronized to PFI input.

Key Specifications

Pinout & Package

MAX6707AZKA+T is housed in an 8-pin SOT23 package (package code K8+2), measuring 2.9mm × 1.6mm × 1.1mm, with gull-wing leads and RoHS-compliant lead-free finish (+T suffix).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6707AZKA+T, MAX6707AKA+T offers lower reset voltage for earlier intervention but reduces noise margin; TPS3808G125DBVR sacrifices PFI/PFO and WDO functionality for lower BOM count and simpler layout - neither is pin-compatible nor functionally equivalent without redesign.

Availability

MAX6707AZKA+T is available at Aetrix Electronics and suitable for white goods control, networking equipment, intelligent instrumentation, and critical µP power monitoring requiring stable component supply across extended temperature ranges.

Supply support for MAX6707AZKA+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

Maxim Integrated (now part of Analog Devices) designs precision analog and mixed-signal ICs for industrial, communications, and computing applications, with emphasis on reliability and integration.

The MAX6701–MAX6708 family was engineered specifically for high-accuracy, multi-function microprocessor supervision in space-constrained, thermally demanding systems - delivering reset, watchdog, and power-fail detection in a single SOT23-8 package.

FAQ

What is the exact reset threshold voltage of MAX6707AZKA+T?

The MAX6707AZKA+T has a nominal reset threshold of 2.32V, with guaranteed limits of 2.24V (min) to 2.40V (max) over the full -40°C to +125°C operating temperature range. This value is defined by the 'Z' suffix in the part number and is factory-trimmed for precision across voltage and temperature.

Does MAX6707AZKA+T support manual reset triggering and watchdog clearing via the same pin?

Yes - the MR pin on MAX6707AZKA+T serves both functions: pulling MR low forces an immediate reset pulse, and on the A-version (denoted by 'A' in MAX6707A), it also clears the watchdog timer and deasserts WDO. This dual role simplifies pushbutton interface design without requiring additional logic.

Can MAX6707AZKA+T monitor a 2.5V supply and still provide accurate power-fail warning for a separate 5V rail?

Yes - MAX6707AZKA+T monitors VCC (2.5V rail) with its 2.32V threshold while simultaneously using the PFI pin, referenced to an internal 0.62V comparator, to detect collapse of a 5V rail via an external resistor divider. PFO then signals the event independently of the main reset path.

What is the watchdog timeout behavior of MAX6707AZKA+T when VCC drops below the reset threshold?

When VCC falls below 2.32V, MAX6707AZKA+T asserts both RESET and WDO low simultaneously - regardless of WDI activity. This ensures fail-safe response to supply failure, with WDO remaining asserted until VCC recovers above threshold and a valid WDI edge occurs (A-version) or until reset completes (non-A version).

Is MAX6707AZKA+T compatible with standard SOT23-8 PCB footprints and reflow profiles?

Yes - MAX6707AZKA+T uses the industry-standard 8-pin SOT23 package (outline 21-0078, land pattern 90-0176) and is qualified for lead-free reflow per JEDEC J-STD-020. Its +T suffix confirms RoHS-compliant, Pb-free terminations and compatibility with standard assembly processes.