Analog Devices Inc./Maxim Integrated MAX6717UKYDD3+T

Overview

MAX6717UKYDD3+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 asserts system reset on supply undervoltage, supports manual reset via MR input, and guarantees valid reset logic down to VCC1 or VCC2 = 0.8V - used in multivoltage embedded power management.

For engineers reviewing the MAX6717UKYDD3+T datasheet, MAX6717UKYDD3+T pinout, MAX6717UKYDD3+T application, or MAX6717UKYDD3+T equivalent, key selection factors include dual-supply threshold accuracy (±1.5% typical), ultra-low 14µA supply current at 3.6V, immunity to sub-20µs VCC transients, and guaranteed operation over –40°C to +85°C industrial temperature range.

Technical Context

The MAX6717UKYDD3+T implements two independent voltage comparators with internal reference trimming, driving a single open-drain RST output that remains asserted for ≥210ms after all monitored supplies recover above their thresholds. Its reset logic is validated down to 0.8V on either VCC1 or VCC2, enabling robust brownout detection in low-voltage systems.

It integrates a 50kΩ internal pullup on the MR pin, accepts TTL/CMOS-compatible manual reset pulses ≥1µs wide, and features glitch rejection of ≤100ns on MR. No watchdog, power-fail, or RSTIN functionality is included - confirmed by Selector Guide and Pin Configuration tables.

Key Specifications

Pinout & Package

MAX6717UKYDD3+T uses a 5-pin SOT23-5 package (2.9mm × 1.6mm × 1.1mm), surface-mount, lead-free (+T suffix), with thermal pad not electrically connected.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6717UKYDD3+T, TPS3808G125DBVR reduces cost but sacrifices dual-supply autonomy, while ADM6717AKSZ-REEL7 offers flexibility at the expense of factory-calibrated accuracy and 43% higher supply current - making MAX6717UKYDD3+T optimal for space-constrained, low-power dual-rail systems requiring production-ready precision.

Availability

MAX6717UKYDD3+T is available at Aetrix Electronics and suitable for industrial PLC power sequencing, telecom line card voltage monitoring, medical portable diagnostic devices, and automotive infotainment MCU reset applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MAX6717UKYDD3+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 and mixed-signal ICs for power, sensing, and interface applications, with emphasis on high-reliability industrial and communications systems.

MAX6717UKYDD3+T belongs to the MAX6715–MAX6729 family of ultra-low-voltage SOT23 µP supervisory circuits, engineered specifically for multivoltage embedded systems needing compact, low-power, and temperature-robust reset management.

FAQ

What is the reset timeout period for MAX6717UKYDD3+T?

The MAX6717UKYDD3+T has a minimum reset timeout period of 210ms, as indicated by the "D3" suffix in its part number. This timeout begins after all monitored supplies (VCC1 and VCC2) rise above their respective factory-trimmed thresholds and ensures the microprocessor receives a sufficiently long reset pulse for reliable initialization. The actual timeout is typically 210ms at +25°C and varies within ±20% over temperature.

Does MAX6717UKYDD3+T support watchdog or power-fail functionality?

No, MAX6717UKYDD3+T does not include watchdog timer (WDI), power-fail input (PFI), or power-fail output (PFO) functionality. Per the Selector Guide and Pin Configuration table, it is a dual-supply-only variant with RST, GND, MR, VCC2, and VCC1 pins - omitting WDI, PFI, PFO, and RSTIN. These features are present only in higher-numbered variants like MAX6721–MAX6729.

What are the factory-trimmed reset thresholds for MAX6717UKYDD3+T?

The "YD" suffix in MAX6717UKYDD3+T specifies VCC1 threshold = 2.125V (Y) and VCC2 threshold = 0.788V (D), per the Reset Voltage Threshold Suffix Guide. These are factory-trimmed values with ±1.5% typical accuracy over temperature, eliminating need for external resistor networks and ensuring consistent performance across production lots.

Can MAX6717UKYDD3+T operate with VCC1 = 1.8V and VCC2 = 1.2V?

Yes, MAX6717UKYDD3+T fully supports VCC1 = 1.8V and VCC2 = 1.2V. Its specifications guarantee valid reset output logic down to VCC1 or VCC2 = 0.8V, and electrical characteristics (e.g., supply current, reset delay, MR interface) are tested across the full 0.8V–5.5V range. This makes it suitable for modern low-voltage SoC and FPGA power domains.

Is an external pullup resistor required for the RST pin of MAX6717UKYDD3+T?

Yes, an external pullup resistor is required on the RST pin of MAX6717UKYDD3+T because it is configured as an open-drain output. A typical value is 10kΩ to VCC1, selected to ensure adequate rise time while limiting current draw. Without this pullup, RST cannot drive high and will remain floating or weakly pulled low, preventing proper reset release to downstream logic.