Analog Devices Inc./Maxim Integrated MAX6717UKYDD3

Overview

MAX6717UKYDD3 from Maxim Integrated is a dual-voltage microprocessor supervisory circuit in 5-pin SOT23 package, monitoring VCC1 (primary) and VCC2 (secondary) supplies with factory-trimmed reset thresholds - specifically 2.125V (VTH1, suffix Y) and 2.125V (VTH2, suffix Y) - and providing 210ms minimum reset timeout (suffix D3). It features open-drain active-low RST output, manual reset input (MR), and guaranteed reset validity down to VCC1 or VCC2 = 0.8V. It is used in portable battery-operated equipment requiring reliable power-on reset and brownout detection.

For engineers reviewing the MAX6717UKYDD3 datasheet, MAX6717UKYDD3 pinout, MAX6717UKYDD3 application, or MAX6717UKYDD3 equivalent, key selection criteria include dual-supply threshold matching (2.125V/2.125V), 210ms reset timeout, open-drain RST output logic, MR input compatibility with TTL/CMOS, and operation across –40°C to +85°C industrial temperature range.

Technical Context

The MAX6717UKYDD3 implements two independent voltage comparators with internal 20ppm/°C tempco references, each comparing VCC1 and VCC2 against fixed 2.125V thresholds. Its reset assertion logic combines ORed fault conditions: VCC1 < 2.125V, VCC2 < 2.125V, or MR low - all triggering a monolithic timeout timer that holds RST low for ≥210ms after recovery.

This device uses BiCMOS process (1072 transistors), draws only 14µA typical supply current at 3.6V, and maintains valid reset state even when VCC1 or VCC2 drops to 0.8V - enabling robust operation during deep brownouts. Its 5-pin SOT23-5 package excludes watchdog, power-fail, or RSTIN inputs, distinguishing it from higher-pin-count variants like MAX6719 or MAX6728.

Key Specifications

Pinout & Package

MAX6717UKYDD3 is housed in a 5-pin SOT23-5 package (1.6mm × 2.9mm × 1.1mm), optimized for space-constrained portable designs. The pinout supports dual-supply monitoring with dedicated VCC1, VCC2, GND, MR, and RST terminals - no shared or multiplexed functions.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6715UTYDD3-T and TPS3808G125DBVR, the MAX6717UKYDD3 delivers optimal integration for matched dual-rail supervision in minimal area - avoiding unnecessary pins or external components while guaranteeing coordinated reset timing across both voltage domains.

Availability

MAX6717UKYDD3 is available at Aetrix Electronics and suitable for portable/battery-operated equipment, industrial control modules, and network edge routers requiring stable component supply with guaranteed long-term manufacturability.

Supply support for MAX6717UKYDD3 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, computing, and communications markets.

The MAX6715–MAX6729 family was designed to replace discrete reset circuits in multivoltage systems - delivering factory-trimmed accuracy, ultra-low quiescent current, and compact SOT23 packaging for space- and power-sensitive applications.

FAQ

What are the exact reset threshold voltages for MAX6717UKYDD3?

The MAX6717UKYDD3 has factory-trimmed reset thresholds of 2.125V (typ) for both VCC1 and VCC2, as indicated by the 'Y' suffix in its part number per Maxim's Reset Voltage Threshold Suffix Guide. These values are guaranteed over –40°C to +85°C with ±1.5% tolerance and 20ppm/°C tempco - ensuring precise, temperature-stable supervision without external calibration.

Does MAX6717UKYDD3 support watchdog functionality?

No, the MAX6717UKYDD3 does not include watchdog functionality. Per Maxim's Selector Guide, only MAX6721 through MAX6729 variants integrate WDI input; the MAX6717UKYDD3 is a dual-supply-only supervisor with MR, RST, VCC1, VCC2, and GND pins - confirmed by its 5-pin SOT23-5 package and absence of WDI pin in the Pin Description table.

Can MAX6717UKYDD3 monitor three voltage rails?

No, MAX6717UKYDD3 monitors exactly two voltage rails: VCC1 (primary) and VCC2 (secondary). It lacks RSTIN, PFI, or WDI pins required for triple-voltage supervision. Devices like MAX6719UKYDD3 or MAX6728KA-YD3-T add RSTIN or PFI inputs for third-rail monitoring - but MAX6717UKYDD3 is strictly dual-rail per its ordering information and functional diagram.

What is the reset output configuration of MAX6717UKYDD3?

The MAX6717UKYDD3 features a single open-drain active-low RST output (Pin 1), as confirmed by its placement in the "OPEN-DRAIN RESET" column of Maxim's Selector Guide and absence from "PUSH-PULL RESET" rows. This requires an external pullup resistor to the target logic rail (e.g., 3.3V or 1.8V) and supports wired-OR reset bus architectures.

Is MAX6717UKYDD3 compatible with 1.8V systems?

Yes, MAX6717UKYDD3 is fully compatible with 1.8V systems: its VCC2 input accepts voltages from 0.9V to 3.3V, and its 2.125V threshold falls within the valid operating range for 1.8V rails when used as a secondary supply monitor. The device guarantees reset validity down to VCC1 or VCC2 = 0.8V, and its 14µA supply current minimizes impact on low-voltage battery life.