Analog Devices Inc./Maxim Integrated MAX6717UKYHD3

Overview

MAX6717UKYHD3 from Maxim Integrated is a dual-voltage microprocessor supervisory circuit in 5-pin SOT23 package, monitoring VCC1 (1.8V–5.0V) and VCC2 (0.9V–3.3V) with factory-trimmed reset thresholds, 210ms minimum reset timeout, and open-drain active-low RST output. It guarantees valid reset assertion down to VCC1 or VCC2 = 0.8V and draws only 14µA typical supply current at 3.6V - used in multivoltage embedded systems requiring reliable power-up sequencing and brownout protection.

For engineers reviewing the MAX6717UKYHD3 datasheet, MAX6717UKYHD3 pinout, MAX6717UKYHD3 application, or MAX6717UKYHD3 equivalent, key selection criteria include dual-supply monitoring capability, guaranteed reset validity below 1V, low quiescent current for battery operation, and compatibility with manual reset and watchdog-free designs.

Technical Context

The MAX6717UKYHD3 implements two independent voltage comparators with internal reference trimming, asserting reset when either VCC1 falls below its factory-set threshold (e.g., 3.075V typ) or VCC2 drops below its matched threshold (e.g., 2.925V typ), with 0.5% hysteresis and 20ppm/°C tempco. Reset remains asserted for a fixed 210ms (min) timeout after both supplies recover.

No watchdog timer, power-fail input/output, or RSTIN auxiliary monitor is integrated - confirmed by Selector Guide and Pin Configuration tables. The device uses open-drain RST output referenced to VCC1, requiring external pullup, and includes internal 50kΩ MR pullup to VCC1 with 1µs minimum pulse width support.

Key Specifications

Pinout & Package

MAX6717UKYHD3 is housed in a 5-pin SOT23-5 package (2.9mm × 1.6mm × 1.1mm), surface-mount, RoHS-compliant, with thermal pad option not included. Pin 1 is marked via dot; pin numbering follows standard SOT23 convention (counterclockwise from mark).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6715UTLTD3-T and TPS3808G33DBVR, MAX6717UKYHD3 uniquely delivers matched 3.075V/2.925V thresholds in a compact 5-pin open-drain package with integrated MR pullup - optimizing for 3.3V-based dual-rail systems where precision threshold alignment and minimal external components are critical.

Availability

MAX6717UKYHD3 is available at Aetrix Electronics and suitable for telecom line cards, industrial PLC modules, medical point-of-care monitors, automotive infotainment units, and portable instrumentation requiring stable component supply across extended temperature and low-power operation.

Supply support for MAX6717UKYHD3 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and computing markets.

The MAX6715–MAX6729 family was designed specifically for ultra-low-voltage dual/triple-supply microprocessor supervision in space-constrained, multirail embedded systems - emphasizing precision threshold matching, sub-1V reset validity, and minimal quiescent current.

FAQ

What is the exact reset threshold voltage for VCC1 and VCC2 on MAX6717UKYHD3?

The MAX6717UKYHD3 features factory-trimmed reset thresholds: VCC1 = 3.075V (typical, falling), VCC2 = 2.925V (typical, falling), with ±1.5% tolerance over temperature. These values are defined by the "YH" suffix per Maxim's Reset Voltage Threshold Suffix Guide and are verified in the Electrical Characteristics table on page 3 of the datasheet.

Does MAX6717UKYHD3 include a watchdog timer or power-fail functionality?

No, MAX6717UKYHD3 does not include watchdog timer, power-fail input/output (PFI/PFO), or adjustable RSTIN monitoring - confirmed by the Selector Guide (lists "-" for WDI, PFI/PFO, RSTIN) and Pin Configuration table (no WDI, PFI, or RSTIN pins assigned). It is a dedicated dual-supply supervisor with manual reset only.

What is the reset timeout period for MAX6717UKYHD3, and is it adjustable?

The MAX6717UKYHD3 has a fixed minimum reset timeout period of 210ms, denoted by the "D3" suffix in its part number. This value is factory-programmed and not user-adjustable; it is guaranteed over -40°C to +85°C and appears in the Electrical Characteristics table under "Reset Timeout Period tRP".

What package type and pin count does MAX6717UKYHD3 use?

MAX6717UKYHD3 is packaged in a 5-pin SOT23-5 (also labeled SOT-23-5) surface-mount package, with pin 1 marked by a dot. This is explicitly stated in the Ordering Information table and confirmed by the Pin Description section, which assigns functions to exactly five pins: RST, GND, MR, VCC2, and VCC1.

Is the reset output of MAX6717UKYHD3 push-pull or open-drain?

The MAX6717UKYHD3 features an open-drain active-low RST output, as confirmed by the Selector Guide (lists "1" under "OPEN-DRAIN RESET") and Pin Description (states "RST changes from high to low… Open-drain outputs require an external pullup resistor"). No push-pull option is available for this variant.