Analog Devices Inc./Maxim Integrated MAX6717UKSDD3+

Overview

The MAX6717UKSDD3+ from Maxim Integrated is a dual-voltage microprocessor supervisory circuit in 5-pin SOT23 package, monitoring VCC1 (primary supply) and VCC2 (secondary supply) with factory-trimmed reset thresholds of 4.625V (VTH1) and 3.075V (VTH2), 210ms minimum reset timeout, open-drain active-low RST output, and manual reset input. It ensures reliable system boot and brownout protection in low-power embedded systems where supply integrity is critical.

For engineers reviewing the MAX6717UKSDD3+ datasheet, MAX6717UKSDD3+ pinout, MAX6717UKSDD3+ application, or MAX6717UKSDD3+ equivalent, this page delivers verified specifications, exact pin functions, real-world use cases in multivoltage systems, and two confirmed alternative parts with documented technical and application differences.

Technical Context

This device implements dual independent voltage comparators with internal reference trimming, guaranteeing valid reset assertion down to VCC1 or VCC2 = 0.8V. Its reset logic combines asynchronous threshold detection with a monotonic timeout counter that restarts on any threshold violation before timeout completion.

The MAX6717UKSDD3+ features an internal 50kΩ pullup on MR, supports TTL/CMOS-compatible manual reset triggering, and provides immunity to sub-20µs VCC transients - confirmed by typical operating characteristics graphs showing no reset assertion for 100mV overdrive pulses under 1µs duration.

Key Specifications

Pinout & Package

MAX6717UKSDD3+ uses a 5-pin SOT23 package (JEDEC MO-178AA). Pin 1 is RST (active-low open-drain reset output), Pin 2 is GND, Pin 3 is MR (active-low manual reset input with internal 50kΩ pullup to VCC1), Pin 4 is VCC2 (secondary supply input), and Pin 5 is VCC1 (primary supply input).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6717UKSDD3+, MAX6718UKSDD3+ offers push-pull drive for simpler interface but sacrifices bus-sharing flexibility, while TPS3808G33DBVR trades dual monitoring for 90% lower quiescent current - making each suitable only for distinct power architecture constraints.

Availability

MAX6717UKSDD3+ is available at Aetrix Electronics and suitable for industrial PLC controllers, network router power management, medical diagnostic handhelds, and POS terminal power sequencing requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX6717UKSDD3+ 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 and mixed-signal ICs for power, sensing, and connectivity applications, with emphasis on reliability and integration for industrial and communications systems.

The MAX6715–MAX6729 family delivers compact, low-power supervisory solutions for multivoltage embedded systems - specifically engineered to replace discrete reset circuits while guaranteeing operation down to 0.8V supply.

FAQ

What is the exact reset threshold voltage for VCC1 on the MAX6717UKSDD3+?

The MAX6717UKSDD3+ has a factory-trimmed VCC1 reset threshold of 4.625V (typical), with tolerance of ±125mV (min/max 4.500V/4.750V) across temperature. This value is encoded in the "S" suffix per Maxim's Reset Voltage Threshold Suffix Guide and applies specifically to the MAX6717UKSDD3+ variant - not the broader MAX6717 family.

Does the MAX6717UKSDD3+ support monitoring a third voltage rail?

No, the MAX6717UKSDD3+ is a dual-voltage supervisor and does not include RSTIN or PFI inputs. Only MAX6719/MAX6720 and higher variants (e.g., MAX6723–MAX6729) provide the adjustable RSTIN input for triple-voltage monitoring. The MAX6717UKSDD3+ monitors only VCC1 and VCC2 as specified in its Selector Guide entry.

What is the function of Pin 3 (MR) on the MAX6717UKSDD3+?

Pin 3 is the active-low Manual Reset input (MR) with an internal 50kΩ pullup resistor to VCC1. Pulling MR low forces an immediate reset assertion, which remains active for the full 210ms timeout period after MR returns high. If unused, MR may be left floating or tied to VCC1 - no external components are required.

Is the MAX6717UKSDD3+ pin-compatible with other MAX67xx SOT23-5 variants?

Yes, all MAX6717/MAX6718 variants in SOT23-5 share identical pinout: Pin 1=RST, Pin 2=GND, Pin 3=MR, Pin 4=VCC2, Pin 5=VCC1. However, MAX6717UKSDD3+ (open-drain RST) is not functionally interchangeable with MAX6718UKSDD3+ (push-pull RST) without verifying load compatibility and bus topology requirements.

What is the guaranteed minimum reset timeout period for the MAX6717UKSDD3+?

The MAX6717UKSDD3+ guarantees a minimum reset timeout period of 210ms, as indicated by the "D3" suffix in its part number per Maxim's Reset Timeout Period Suffix Guide. This is the duration RST remains asserted after all monitored supplies exceed their thresholds or after MR release - critical for ensuring µP and peripheral initialization completeness.