Analog Devices Inc./Maxim Integrated MAX6717UKTGD3

Overview

MAX6717UKTGD3 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 asserts system reset if either supply falls below its threshold and maintains reset for the full timeout after recovery - used in multivoltage embedded systems requiring reliable power-up sequencing and brownout protection.

For engineers reviewing the MAX6717UKTGD3 datasheet, MAX6717UKTGD3 pinout, MAX6717UKTGD3 application, or MAX6717UKTGD3 equivalent, key selection criteria include dual-supply monitoring capability, guaranteed reset validity down to VCC1/VCC2 = 0.8V, low 14µA typical supply current at 3.6V, and compatibility with manual reset and watchdog-free designs.

Technical Context

The MAX6717UKTGD3 implements two independent voltage comparators with internal reference trimming, each feeding a shared reset timeout timer. Its reset logic asserts RST low when VCC1 drops below VTH1 or VCC2 drops below VTH2, and holds RST low for ≥210ms after both supplies exceed their thresholds - no adjustable RSTIN, PFI, WDI, or RST2 functionality is included per Selector Guide and Pin Description.

This variant uses open-drain RST output referenced to VCC1, requires external pullup, and features internal 50kΩ MR pullup to VCC1. It operates across –40°C to +85°C and guarantees correct reset state with VCC1 or VCC2 ≥ 0.8V - immune to short VCC transients per Typical Operating Characteristics.

Key Specifications

Pinout & Package

MAX6717UKTGD3 is housed in a 5-pin SOT23-5 package (2.9mm × 1.6mm × 1.1mm), surface-mount, RoHS-compliant, with thermal pad option not present. 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, the MAX6717UKTGD3 uniquely delivers dual-rail supervision in the smallest footprint (5-pin SOT23) with integrated MR pullup and lowest typical supply current - making it optimal for space-constrained, multivoltage embedded systems where only one reset signal is needed.

Availability

MAX6717UKTGD3 is available at Aetrix Electronics and suitable for industrial PLC power sequencing, portable medical monitor boot integrity, and network edge router voltage margining requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for MAX6717UKTGD3 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, mixed-signal, and power management ICs for demanding industrial, computing, and communications applications.

The MAX6715–MAX6729 family delivers ultra-low-voltage dual/triple supervisory circuits optimized for multivoltage systems where space, power, and reliability are critical - targeting embedded controllers, telecom infrastructure, and portable electronics.

FAQ

What is the reset timeout period of the MAX6717UKTGD3?

The MAX6717UKTGD3 has a minimum reset timeout period of 210ms, as indicated by the "D3" suffix in its part number. This timeout begins after both VCC1 and VCC2 rise above their respective factory-trimmed thresholds and ensures the reset signal remains asserted long enough for microprocessor initialization. The value is guaranteed over the full –40°C to +85°C operating temperature range and is not affected by supply voltage variations within specification.

Does the MAX6717UKTGD3 support monitoring a third voltage rail?

No, the MAX6717UKTGD3 does not support third-rail monitoring. Per the Selector Guide and Pin Description, it is a dual-voltage supervisor with dedicated VCC1 and VCC2 inputs only. Models like MAX6719/MAX6720 include RSTIN for adjustable third-rail monitoring, but MAX6717UKTGD3 lacks that pin and internal circuitry - its pinout is strictly five-terminal: RST, GND, MR, VCC2, VCC1.

What type of reset output does the MAX6717UKTGD3 provide?

The MAX6717UKTGD3 provides an active-low open-drain RST output, as confirmed by the Selector Guide and Pin Description. It requires an external pullup resistor to VCC1 (or another appropriate rail) to generate a valid high level. This configuration allows direct interfacing with bidirectional µP reset pins and supports wired-OR reset bus architectures - unlike push-pull variants such as MAX6718.

Is a manual reset input available on the MAX6717UKTGD3?

Yes, the MAX6717UKTGD3 includes an active-low manual reset input (MR) on pin 3. It features an internal 50kΩ pullup resistor to VCC1, enabling simple implementation with a momentary switch to ground. The reset remains asserted for the full 210ms timeout period after MR transitions from low to high - no external components are required unless noise immunity is needed (e.g., 0.1µF capacitor to GND).

What is the minimum supply voltage at which the MAX6717UKTGD3 guarantees correct reset operation?

The MAX6717UKTGD3 guarantees correct reset output logic state with either VCC1 or VCC2 ≥ 0.8V, as specified in the Absolute Maximum Ratings and Detailed Description sections. This ensures reliable reset assertion during deep brownout conditions - a key differentiator versus supervisors that require ≥1.0V or higher to maintain valid output states.