Analog Devices Inc./Maxim Integrated MAX6717UKSDD3+T

Overview

MAX6717UKSDD3+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 min 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 portable battery-operated systems requiring ultra-low-power voltage supervision.

For engineers reviewing the MAX6717UKSDD3+T datasheet, MAX6717UKSDD3+T pinout, MAX6717UKSDD3+T application, or MAX6717UKSDD3+T equivalent, key selection criteria include dual-supply threshold accuracy (±1.5% over temp), immunity to sub-20µs VCC transients, guaranteed reset validity at 0.8V supply, and compatibility with manual reset (MR) and watchdog-free system architectures.

Technical Context

The MAX6717UKSDD3+T implements two independent voltage comparators with internal 20ppm/°C tempco references, each feeding a shared reset timeout timer. Its open-drain RST output asserts low when either VCC1 falls below its factory-set threshold (e.g., 3.075V for 'S' suffix) or VCC2 drops below its threshold (e.g., 3.075V for second 'D'), and remains asserted for ≥210ms after both supplies recover.

No watchdog, power-fail, or RSTIN inputs are present - confirmed by Selector Guide and Pin Description tables. The device uses internal 50kΩ MR pullup and supports TTL/CMOS-compatible manual reset triggering with 1µs minimum pulse width and 100ns glitch rejection.

Key Specifications

Pinout & Package

MAX6717UKSDD3+T is housed in a 5-pin SOT23-5 package (2.9mm × 1.6mm × 1.1mm), RoHS-compliant and lead-free (+T suffix). Pin 1 is marked with dot; pin numbering follows standard SOT23 counterclockwise from mark.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6717UKSDD3+T, TPS3808G33DBVR offers lower IQ but cannot replace dual-rail supervision, while ADM6710LAKSZ-REEL7 adds automotive temperature range but removes MR functionality - making MAX6717UKSDD3+T optimal for cost-sensitive, MR-dependent dual-rail portable designs.

Availability

MAX6717UKSDD3+T is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, set-top box power sequencing, and automotive infotainment MCU supervision requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.

Supply support for MAX6717UKSDD3+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 high-performance analog and mixed-signal ICs for power, sensing, and interface applications, with emphasis on reliability and integration.

The MAX6715–MAX6729 family delivers compact, ultra-low-power supervisory solutions for multivoltage embedded systems - specifically engineered to replace discrete reset circuits in space-constrained, battery-sensitive applications.

FAQ

What is the exact reset threshold voltage for MAX6717UKSDD3+T on VCC1 and VCC2?

The MAX6717UKSDD3+T has identical factory-trimmed reset thresholds for both VCC1 and VCC2: 3.075V (typical), with ±1.5% tolerance over -40°C to +85°C. This is confirmed by the 'S' (VCC1 = 3.075V) and 'D' (VCC2 = 3.075V) suffixes in the part number per Maxim's Reset Voltage Threshold Suffix Guide. The device does not support adjustable thresholds or third-voltage monitoring.

Does MAX6717UKSDD3+T include a watchdog timer or power-fail functionality?

No, MAX6717UKSDD3+T excludes watchdog input (WDI), power-fail input (PFI), and power-fail output (PFO) - verified by the Selector Guide (no checkmarks for WDI or PFI/PFO) and Pin Description (only pins 1–5 assigned to RST, GND, MR, VCC2, VCC1). It is a dedicated dual-voltage supervisor without auxiliary monitoring features.

What is the reset timeout period of MAX6717UKSDD3+T, and how is it set?

The MAX6717UKSDD3+T has a fixed minimum reset timeout period of 210ms, corresponding to the 'D3' suffix per Maxim's Reset Timeout Period Suffix Guide. This value is factory-programmed and non-adjustable. The actual timeout ranges from 210ms (min) to 280ms (max) across temperature and supply variations, ensuring robust µP initialization coverage.

Can MAX6717UKSDD3+T operate with VCC1 = 1.8V and VCC2 = 1.2V simultaneously?

Yes, MAX6717UKSDD3+T supports VCC1 from 1.8V to 5.0V and VCC2 from 0.9V to 3.3V independently. At VCC1 = 1.8V and VCC2 = 1.2V, the device guarantees valid reset assertion as long as either supply remains ≥0.8V, and draws only ~10µA total supply current (ICC1 + ICC2), per Electrical Characteristics table.

Is MAX6717UKSDD3+T pin-compatible with other MAX67xx SOT23-5 variants like MAX6718?

Yes, MAX6717UKSDD3+T shares identical 5-pin SOT23-5 pinout and footprint with MAX6718UK_ _D_ -T variants. Both use Pin 1=RST, Pin 2=GND, Pin 3=MR, Pin 4=VCC2, Pin 5=VCC1. However, functional differences exist: MAX6717 is open-drain RST, while MAX6718 is push-pull RST - requiring schematic review before substitution.