Analog Devices Inc./Maxim Integrated MAX6862UK26+T

Overview

The MAX6862UK26+T from Maxim Integrated is a nanopower microprocessor supervisory circuit in a 5-pin SOT23 package, featuring a factory-trimmed 2.625V reset threshold, pin-selectable 10ms/150ms (min) reset timeout, active-high push-pull RESET output, manual reset input (MR), and no external components required. It monitors VCC for brownout detection and asserts reset during power-up, power-down, or voltage drop below threshold - used in battery-powered glucose monitors and portable medical devices.

For engineers reviewing the MAX6862UK26+T datasheet, MAX6862UK26+T pinout, MAX6862UK26+T application, or MAX6862UK26+T equivalent, this page delivers verified specifications, validated pin functions, confirmed timing behavior under VCC transients, and real-world substitution guidance for low-power embedded systems requiring guaranteed reset validity down to VCC = +1.1V.

Technical Context

The MAX6862UK26+T implements a precision bandgap-based voltage monitor with ±2.5% threshold accuracy over -40°C to +85°C, coupled with a digital timeout generator that supports two fixed delay options selected via the CT pin (low = 10ms min, high = 150ms min). Its MR input includes internal 10kΩ pullup and 250ns MR-to-reset delay, enabling reliable manual reset initiation without external circuitry.

This device belongs to the MAX6861–MAX6863 subfamily and lacks watchdog timer functionality - distinguishing it from MAX6864–MAX6869 variants. It guarantees valid RESET assertion down to VCC = +1.1V and exhibits immunity to VCC transients ≤40µs at 100mV overdrive, making it suitable for noisy, low-voltage battery-supplied systems where deterministic reset timing is critical.

Key Specifications

Pinout & Package

Package: 5-pin SOT23 (lead-free, +T suffix), 2.9mm × 1.6mm footprint, 1.1mm height.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6861UK26+T and TPS3836K26DBVR, the MAX6862UK26+T uniquely offers active-high RESET with pin-selectable timeout - enabling direct interface to common µPs and eliminating BOM variants for different timing requirements.

Availability

MAX6862UK26+T is available at Aetrix Electronics and suitable for glucose monitors, patient vital sign equipment, handheld diagnostics, and low-power IoT edge sensors requiring stable component supply across extended production lifecycles.

Supply support for MAX6862UK26+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 connectivity in demanding industrial and medical applications.

The MAX6861–MAX6863 family was engineered specifically for ultra-low-power supervisory functions in battery-operated medical and portable electronics, emphasizing nanoscale current consumption and guaranteed operation down to 1.1V.

FAQ

What is the exact reset threshold voltage of the MAX6862UK26+T?

The MAX6862UK26+T has a factory-trimmed reset threshold voltage of 2.625V, with ±2.5% tolerance over the full -40°C to +85°C temperature range. This value is confirmed in Table 2 (Threshold Suffix Guide) of the datasheet, where suffix "26" corresponds to 2.625V. The MAX6862UK26+T maintains this accuracy without calibration or external components.

How does the CT pin configure the reset timeout on the MAX6862UK26+T?

On the MAX6862UK26+T, the CT pin selects between two minimum reset timeout periods: connect CT to GND (logic low) for 10ms (min), or connect CT to VCC (logic high) for 150ms (min). This selection is latched at reset deassertion and remains effective until changed. The MAX6862UK26+T does not support dynamic switching during an active timeout.

Does the MAX6862UK26+T include a watchdog timer function?

No, the MAX6862UK26+T does not include a watchdog timer. It belongs to the MAX6861–MAX6863 subfamily, which features manual reset and pin-selectable timeout but omits WDI and watchdog circuitry. Watchdog capability is exclusive to MAX6864–MAX6869 variants. The MAX6862UK26+T relies solely on VCC monitoring and MR input for reset generation.

What is the RESET output type and drive strength of the MAX6862UK26+T?

The MAX6862UK26+T provides an active-high push-pull RESET output. When asserted, RESET is driven low; when deasserted, it is driven high to VCC. At VCC ≥ 2.38V and ISOURCE = 500µA, VOH ≥ 0.8 × VCC. This eliminates the need for an external pullup resistor and ensures clean, rail-to-rail signaling to µP reset inputs - a key feature of the MAX6862UK26+T.

Can the MAX6862UK26+T operate reliably below 1.8V supply voltage?

Yes, the MAX6862UK26+T is fully specified down to VCC = +1.2V and guarantees valid RESET assertion down to VCC = +1.1V. Its 170nA typical supply current at 1.8V and stable threshold reference enable robust operation in ultra-low-voltage battery systems - a core specification validated across temperature and process corners for the MAX6862UK26+T.