Analog Devices Inc./Maxim Integrated MAX6862UK17

Overview

The MAX6862UK17 from Maxim Integrated is a nanopower microprocessor supervisory circuit in a 5-pin SOT23 package, featuring a pin-selectable 10ms/150ms (min) reset timeout, active-high push-pull RESET output, manual reset input (MR), and factory-trimmed 1.665V reset threshold voltage. It monitors VCC for brownout detection, asserts reset during power-up/down, and guarantees valid reset operation down to VCC = +1.1V - ideal for ultra-low-power portable medical devices like glucose monitors.

For engineers reviewing the MAX6862UK17 datasheet, MAX6862UK17 pinout, MAX6862UK17 application, or MAX6862UK17 equivalent, this device delivers verified ultra-low 170nA typical supply current, immunity to short VCC transients, and deterministic reset timing critical for battery-powered embedded systems with strict power and reliability requirements.

Technical Context

The MAX6862UK17 implements a precision bandgap-based voltage monitor with ±2.5% reset threshold accuracy over -40°C to +85°C, coupled with a digital timeout generator that initiates reset assertion when VCC falls below 1.665V or MR is pulled low. Its CT pin selects between two fixed minimum timeout periods (10ms or 150ms), and the active-high push-pull RESET output drives directly to VCC without external components.

This device belongs to the MAX6861–MAX6863 variant group, which shares identical pinout, MR functionality, and CT-based timeout selection but differs from watchdog-equipped variants (e.g., MAX6864–MAX6869) by omitting WDI and watchdog logic - confirming its role as a dedicated voltage-monitoring + manual-reset supervisor without watchdog timer circuitry.

Key Specifications

Pinout & Package

Package: 5-pin SOT23-5, surface-mount, lead-free compatible (standard -T suffix).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microprocessor supervisory applications.

Compared with MAX6862UK17, MAX6861UK17 offers identical supervision accuracy and timeout flexibility but mandates active-low reset signaling, while TPS3837K33 trades nanopower efficiency and threshold programmability for TI's production scalability - making MAX6862UK17 uniquely suited for long-life, low-voltage, active-high reset architectures.

Availability

MAX6862UK17 is available at Aetrix Electronics and suitable for glucose monitors, patient vital sign loggers, handheld diagnostic scanners, and wearable drug infusion pumps requiring stable component supply across multi-year production cycles.

Supply support for MAX6862UK17 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 demanding industrial, medical, and communications applications.

The MAX6861–MAX6863 family was engineered specifically for ultra-low-power battery-operated medical and portable electronics, emphasizing sub-µA quiescent current, guaranteed reset validity at ultra-low VCC, and minimal external component count.

FAQ

What is the exact reset threshold voltage of the MAX6862UK17?

The MAX6862UK17 has a factory-trimmed reset threshold voltage of 1.665V, with ±2.5% tolerance over the full operating temperature range (-40°C to +85°C). This value is confirmed in Table 2 (Threshold Suffix Guide) of the datasheet, where suffix "17" corresponds to 1.665V nominal. The MAX6862UK17 maintains this precise threshold without calibration or external adjustment.

How does the CT pin configure the reset timeout period on the MAX6862UK17?

On the MAX6862UK17, the CT pin selects between two minimum reset timeout periods: connecting CT to GND selects 10ms (min), and connecting CT to VCC selects 150ms (min). These values are specified in Table 1 of the datasheet and are guaranteed across temperature and voltage. The MAX6862UK17 does not support dynamic switching during an active timeout - the selection takes effect only after reset deassertion.

Does the MAX6862UK17 include a watchdog timer function?

No, the MAX6862UK17 does not include a watchdog timer. It belongs to the MAX6861/MAX6862/MAX6863 subgroup, which features only voltage monitoring, manual reset (MR), and CT-selectable timeout - explicitly excluding WDI and watchdog logic. Watchdog capability is present only in MAX6864–MAX6869 variants, as confirmed in the Selector Guide and Pin Descriptions sections of the datasheet.

What is the RESET output configuration of the MAX6862UK17?

The MAX6862UK17 provides an active-high push-pull RESET output (Pin 1), meaning it drives high during reset assertion and low otherwise, referenced directly to VCC. This eliminates the need for an external pullup resistor and ensures clean, rail-to-rail logic transitions. The output is incompatible with open-drain configurations and cannot be wired-ORed with other reset sources without level-shifting.

Is the MAX6862UK17 pin-compatible with other supervisory ICs?

Yes, the MAX6862UK17 is pin-compatible with the TPS3836/TPS3837/TPS3838 family per the datasheet's Features section, sharing identical 5-pin SOT23-5 pinout (VCC, CT, MR, GND, RESET). However, functional equivalence is limited: TPS383x parts lack CT pin selectability and offer fixed timeouts, while MAX6862UK17's 1.665V threshold and 170nA current are not matched by TI's offerings - requiring validation of timing and voltage margins in replacement scenarios.