Analog Devices Inc./Maxim Integrated MAX6717UKYHD3-T

Overview

MAX6717UKYHD3-T 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 thresholds, asserting active-low open-drain reset for ≥210ms after supply recovery, and supporting manual reset input - used in multivoltage embedded systems requiring reliable power-on reset and brownout detection.

For engineers reviewing the MAX6717UKYHD3-T datasheet, MAX6717UKYHD3-T pinout, MAX6717UKYHD3-T application, or MAX6717UKYHD3-T equivalent, key selection criteria include dual-supply threshold accuracy (±1.5% typical), guaranteed reset validity down to VCC1/VCC2 = 0.8V, 14µA typical supply current at 3.6V, and compatibility with battery-operated and industrial equipment where low quiescent current and small footprint are critical.

Technical Context

The MAX6717UKYHD3-T integrates two independent voltage comparators with internal reference trimming, a reset timeout timer with 210ms (min) delay, and logic-controlled reset assertion that persists until both monitored supplies exceed their thresholds and the timeout elapses. It uses BiCMOS process (1072 transistors) for low leakage and stable operation across -40°C to +85°C.

Its open-drain RST output requires external pullup and remains asserted during VCC1 or VCC2 undervoltage, MR low pulse, or supply recovery timeout; the internal 50kΩ MR pullup enables direct pushbutton interface without external components, and immunity to sub-20µs VCC transients ensures robustness in noisy environments.

Key Specifications

Pinout & Package

MAX6717UKYHD3-T is housed in a 5-pin SOT23-5 package (1.6mm × 2.9mm × 1.1mm), surface-mount, lead-free compatible, with gull-wing leads and thermal pad not present.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6717UKYHD3-T, MAX6316US29D3-T omits VCC2 supervision and MR functionality, limiting use to simpler systems, while TPS3808G18DBVR offers wider timeout flexibility and lower current but cannot replace dual-voltage monitoring - making MAX6717UKYHD3-T uniquely suited for multirail integrity assurance.

Availability

MAX6717UKYHD3-T is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical monitors, telecom line cards, and set-top box power management requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX6717UKYHD3-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) 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 compact, multivoltage embedded systems needing reliable, low-power reset supervision with minimal external components - targeting space- and power-sensitive applications from networking gear to portable instrumentation.

FAQ

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

The MAX6717UKYHD3-T has a VCC1 reset threshold of 2.125V (typical, falling), with ±1.5% tolerance over temperature, and a VCC2 threshold of 2.188V (typical, falling), also ±1.5%. These values are factory-trimmed and specified in the Reset Voltage Threshold Suffix Guide under suffix "YH". Both thresholds are guaranteed valid down to VCC1 or VCC2 = 0.8V, ensuring robust operation during brownout conditions. The MAX6717UKYHD3-T does not support adjustable RSTIN or PFI inputs.

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

No, the MAX6717UKYHD3-T does not include watchdog timer (WDI) or power-fail input/output (PFI/PFO) functionality. Per the Selector Guide, only MAX6721–MAX6729 variants support WDI, and only MAX6728/MAX6729 support PFI/PFO. The MAX6717UKYHD3-T is a dual-supply supervisor with manual reset (MR) and open-drain RST output only - confirmed by its 5-pin SOT23-5 pinout and absence of WDI or PFI pins in the Pin Description table.

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

The MAX6717UKYHD3-T has a fixed reset timeout period of 210ms (minimum), 280ms (maximum), as indicated by the "D3" suffix in its part number per the Reset Timeout Period Suffix Guide. This timeout is internally generated and not adjustable via external components. It begins timing after all monitored supplies (VCC1 and VCC2) rise above their respective thresholds and continues regardless of subsequent supply fluctuations - ensuring µP boot completion before reset release.

Can the MAX6717UKYHD3-T operate with VCC1 = 1.8V and VCC2 = 1.2V simultaneously?

Yes, the MAX6717UKYHD3-T supports VCC1 as low as 1.8V and VCC2 as low as 0.9V, so operation at VCC1 = 1.8V and VCC2 = 1.2V is fully within specification. Electrical Characteristics confirm valid operation down to VCC = 0.8V, and Typical Operating Characteristics include plots for VCC1 = 1.8V/VCC2 = 1.2V. Supply current remains at 14µA (typ) under these conditions, and reset thresholds retain ±1.5% accuracy across the full -40°C to +85°C range.

Is the MAX6717UKYHD3-T pin-compatible with other devices in the MAX6715–MAX6729 family?

No, the MAX6717UKYHD3-T is not pin-compatible with most other MAX6715–MAX6729 variants due to differing pin counts and functions. It uses a 5-pin SOT23-5 package (pins: RST, GND, MR, VCC2, VCC1), whereas 6-pin variants (e.g., MAX6716) add WDI or RST2, and 8-pin variants (e.g., MAX6729) include PFI/PFO. Only MAX6717 and MAX6718 share the identical 5-pin SOT23-5 footprint and pinout - but differ in reset output type (open-drain vs. push-pull).