Analog Devices Inc./Maxim Integrated MAX6717UKTGD3+T

Overview

The MAX6717UKTGD3+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 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-on reset and brownout detection.

For engineers reviewing the MAX6717UKTGD3+T datasheet, MAX6717UKTGD3+T pinout, MAX6717UKTGD3+T application, or MAX6717UKTGD3+T equivalent, key selection criteria include dual-supply threshold accuracy (±1.5% over temp), immunity to sub-20µs VCC transients, guaranteed reset validity at ultra-low supply (0.8V), and compatibility with manual reset, watchdog-free designs in space-constrained telecom and portable equipment.

Technical Context

This device implements two independent voltage comparators with internal 20ppm/°C tempco references, driving a single-shot timeout timer that holds RST low for ≥210ms after all monitored supplies recover. Its open-drain RST output is referenced to VCC1 and requires an external pullup; no internal pullup is provided on RST.

The MAX6717UKTGD3+T lacks RSTIN, WDI, PFI/PFO, and RST2 pins - confirming it is a dual-monitor-only variant with manual reset (MR) input and no watchdog or power-fail functionality. Pin 3 is MR (active-low, 50kΩ internal pullup to VCC1), and reset assertion occurs if either VCC1 or VCC2 falls below its factory-set threshold.

Key Specifications

Pinout & Package

MAX6717UKTGD3+T uses a 5-pin SOT23-5 package (2.9mm × 1.6mm × 1.1mm), surface-mount, lead-free (+T suffix), rated for -40°C to +85°C operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6717UKTGD3+T, MAX6316LUK31D3+T reduces functionality to single-rail monitoring but retains identical package and timeout, while TPS3808G33DBVR offers lower IQ and push-pull output but cannot supervise two independent supplies - making MAX6717UKTGD3+T uniquely suited for true dual-voltage integrity assurance.

Availability

MAX6717UKTGD3+T is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, portable medical devices, and POS terminals requiring stable component supply with guaranteed long-term availability and full traceability.

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

The MAX6715–MAX6729 family delivers ultra-low-voltage, multi-rail supervisory functions in miniature SOT23 packages - engineered specifically for space- and power-constrained embedded systems needing robust, deterministic reset behavior across wide temperature ranges.

FAQ

What is the reset timeout period of the MAX6717UKTGD3+T?

The MAX6717UKTGD3+T has a minimum reset timeout period of 210ms, as indicated by the "D3" suffix in its part number. This value is guaranteed over the full -40°C to +85°C operating temperature range and ensures sufficient hold time for microprocessor initialization sequences before releasing the reset signal. The timeout begins when all monitored supplies rise above their respective thresholds and ends 210ms later, regardless of subsequent supply stability.

Does the MAX6717UKTGD3+T support monitoring a third voltage rail?

No, the MAX6717UKTGD3+T does not support a third voltage rail. It is a dual-supply supervisor only, with dedicated VCC1 and VCC2 inputs. Unlike variants such as MAX6719 or MAX6723, it lacks the RSTIN pin required for externally adjustable third-rail monitoring. Its pinout (5-pin SOT23) and Selector Guide entry confirm it provides only two voltage monitoring channels and no RSTIN, WDI, or PFI functionality.

What is the function of the MR pin on the MAX6717UKTGD3+T?

The MR (Manual Reset) pin on the MAX6717UKTGD3+T is an active-low input with an internal 50kΩ pullup resistor to VCC1. Pulling MR low forces an immediate reset assertion on the RST output, which remains active for the full 210ms timeout period even after MR returns high. This allows hardware-initiated resets via pushbuttons or system-level control signals without requiring external pullup components or debouncing circuitry.

Is the RST output of the MAX6717UKTGD3+T push-pull or open-drain?

The RST output of the MAX6717UKTGD3+T is open-drain, as confirmed by the Selector Guide and Pin Description table. It requires an external pullup resistor to VCC1 (or another appropriate rail) to generate a valid high-level signal. This configuration allows wired-OR connectivity with other reset sources and compatibility with bidirectional µP reset pins, unlike push-pull variants such as MAX6718.

What is the minimum operating voltage for valid reset assertion on the MAX6717UKTGD3+T?

The MAX6717UKTGD3+T guarantees valid reset output logic state down to VCC1 or VCC2 = 0.8V, per Absolute Maximum Ratings and Detailed Description sections. Below this level, reset behavior is not specified. This ultra-low valid-voltage threshold enables reliable brownout detection in deeply discharged battery scenarios or low-dropout regulator outputs where traditional supervisors may fail to assert reset.