Analog Devices Inc./Maxim Integrated MAX6717UKSHD3+T

Overview

The MAX6717UKSHD3+T from Maxim Integrated is a dual-voltage microprocessor supervisory circuit in a 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), respectively, and a 210ms minimum reset timeout period. It features an open-drain active-low RST output, manual reset input (MR), and guaranteed reset validity down to VCC1 or VCC2 = 0.8V - designed for reliable power sequencing and brownout protection in multivoltage embedded systems.

For engineers reviewing the MAX6717UKSHD3+T datasheet, MAX6717UKSHD3+T pinout, MAX6717UKSHD3+T application, or MAX6717UKSHD3+T equivalent, key selection criteria include dual-supply threshold accuracy (±1.5% over temperature), ultra-low quiescent current (14µA typical at 3.6V), immunity to sub-100ns VCC transients, and compatibility with 1.8V–5.0V primary and 0.9V–3.3V secondary rails in space-constrained industrial and telecom designs.

Technical Context

This device implements two independent voltage comparators with internal 20ppm/°C tempco references, each feeding a shared reset timeout timer with fixed 210ms (min) delay. The RST output asserts low when either VCC1 falls below 4.625V or VCC2 drops below 3.075V, and remains asserted for the full timeout after both supplies recover - ensuring deterministic reset hold time without external timing components.

Its MR input includes a 50kΩ internal pullup to VCC1, supports TTL/CMOS logic levels, and triggers reset on falling edge with 200ns propagation delay; the open-drain RST output requires an external pullup and sinks up to 3.2mA at VCC1 ≥ 4.5V while maintaining VOL ≤ 0.4V - enabling direct interfacing with bidirectional µP reset pins via series resistor.

Key Specifications

Pinout & Package

Package: 5-pin SOT23 (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 MAX6717UKSHD3+T, the MAX6716UTLTD3-T offers push-pull drive but sacrifices reset bus flexibility, while the TPS3808G33DBVR reduces power consumption by 82% yet requires additional supervision hardware for dual-rail reliability - making MAX6717UKSHD3+T optimal for compact, robust multivoltage reset coordination.

Availability

MAX6717UKSHD3+T is available at Aetrix Electronics and suitable for industrial PLC power sequencing, telecom line card voltage monitoring, and embedded medical sensor hub designs requiring stable component supply with guaranteed long-term availability and traceable sourcing.

Supply support for MAX6717UKSHD3+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 delivers compact, ultra-low-power supervisory solutions optimized for multivoltage embedded systems where precision threshold matching, minimal footprint, and guaranteed reset validity under brownout are critical design requirements.

FAQ

What are the exact reset threshold voltages for MAX6717UKSHD3+T?

The MAX6717UKSHD3+T has factory-trimmed reset thresholds of 4.625V (VTH1, VCC1) and 3.075V (VTH2, VCC2), with ±1.5% tolerance over -40°C to +85°C. These values are encoded in the "SH" suffix per Maxim's Reset Voltage Threshold Suffix Guide and confirmed in the Electrical Characteristics table on page 2 of the datasheet.

Does MAX6717UKSHD3+T support watchdog functionality?

No, the MAX6717UKSHD3+T does not include watchdog functionality. Per the Selector Guide, only MAX6721–MAX6729 variants feature WDI input; MAX6717UKSHD3+T is a dual-supply supervisor with MR input and open-drain RST output only - confirmed by its absence in the "WATCHDOG INPUT" column of the Selector Guide table.

What is the reset timeout period for MAX6717UKSHD3+T and how is it set?

The MAX6717UKSHD3+T has a 210ms minimum reset timeout period, indicated by the "D3" suffix in its part number. This value is fixed by internal capacitor sizing and does not require external components - verified in the Reset Timeout Period table (page 3) where D3 corresponds to 140ms (min)/210ms (typ)/280ms (max).

Can MAX6717UKSHD3+T monitor a third voltage rail?

No, the MAX6717UKSHD3+T is a dual-voltage supervisor and lacks RSTIN or PFI inputs. Only MAX6719/MAX6720 and higher variants (e.g., MAX6723–MAX6729) provide auxiliary voltage monitoring capability - confirmed by the Selector Guide showing zero checkmarks for "ADJUSTABLE RESET COMPARATOR INPUT" in the MAX6717 row.

What package type and pin count does MAX6717UKSHD3+T use?

The MAX6717UKSHD3+T uses a 5-pin SOT23 package (2.9mm × 1.6mm), as specified in the Ordering Information table (page 1) and Pin Configuration diagrams. The "UK" prefix in the part number explicitly denotes the 5-pin SOT23 variant, distinct from "UT" (6-pin) or "KA" (8-pin) packages in the same family.