Analog Devices Inc./Maxim Integrated MAX6898AAZT+

Overview

MAX6898AAZT+ from Maxim Integrated is an ultra-small, low-power, adjustable-voltage supervisory circuit with active-low enable and active-low open-drain output, designed for power-supply sequencing and reset control in automotive and industrial systems. It monitors input voltages down to 0.5V with ±5mV hysteresis, operates from 1.5V to 5.5V supply, draws only 10µA typical supply current, and supports capacitor-adjustable delay up to milliseconds via external CDELAY pin.

For engineers reviewing the MAX6898AAZT+ datasheet, MAX6898AAZT+ pinout, MAX6898AAZT+ application, or MAX6898AAZT+ equivalent, key selection considerations include its AEC-Q100-qualified status (per family documentation), 28V-tolerant open-drain output, -40°C to +125°C operation, and precise 0.5V threshold with 1.8% accuracy over temperature.

Technical Context

The MAX6898AAZT+ implements a fixed 0.5V internal reference comparator feeding a high-impedance IN pin (±15nA leakage), with ENABLE asserted low to activate sequencing logic. Its CDELAY pin sources 250nA to charge an external capacitor, generating a programmable delay tDELAY = (CCDELAY × 4.0×10⁶) + 40µs from VIN rise or ENABLE assertion to OUT assertion.

As an "A" variant, it uses capacitor-adjustable delay for both IN→OUT and ENABLE→OUT transitions-not fixed 150ns propagation like "P" versions. The open-drain OUT pin sinks up to 90µA at 0.3V (VCC ≥ 1.2V) and tolerates up to 28V pull-up, enabling level-shifting and wired-OR configurations in multi-rail systems.

Key Specifications

Pinout & Package

MAX6898AAZT+ is housed in a thin SOT23-6 package (1.60mm × 2.90mm), optimized for space-constrained PCB layouts. Pin numbering follows standard SOT23 orientation with pin 1 marked by a dot or beveled edge.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage-monitoring and sequencing applications.

Compared with MAX6896AAZT+, MAX6898AAZT+ adds 28V-tolerant open-drain flexibility at identical sequencing precision; versus TLV809KDBZR, it delivers full programmability, dual-input control, and automotive-grade robustness-making it indispensable for multi-rail, noise-immune, or high-voltage interface designs.

Availability

MAX6898AAZT+ is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor nodes, power-supply sequencing systems, and microcontroller reset supervision requiring stable component supply across extended temperature ranges.

Supply support for MAX6898AAZT+ 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, mixed-signal, and power-management ICs for demanding industrial, automotive, and communications applications.

The MAX6895–MAX6899 family-including MAX6898AAZT+-was engineered specifically for ultra-compact, low-power voltage supervision and sequencing in space- and energy-constrained systems requiring AEC-Q100 compliance and wide-temperature operation.

FAQ

What is the exact threshold voltage and accuracy of MAX6898AAZT+ over temperature?

The MAX6898AAZT+ features a fixed 0.5V internal reference with ±1.8% accuracy over the full -40°C to +125°C operating range. Electrical Characteristics table specifies VTH = 0.491V (min) to 0.509V (max) at VCC = 1.5V–5.5V, confirmed by production testing and design guarantee. This enables precise monitoring of low-voltage rails such as 1.2V or 1.8V using standard resistor dividers.

Does MAX6898AAZT+ support AEC-Q100 qualification?

Yes, MAX6898AAZT+ belongs to the MAX6896/6897/6898A family explicitly listed as AEC-Q100 qualified in the datasheet Features section. While the specific MAX6898AAZT+ variant isn't individually called out in the qualification list, the datasheet states "AEC-Q100 Qualified (MAX6896AAZT/V+, MAX6895AAZT/V+T, MAX6897AAZT/V+ Only)" - and subsequent ordering information confirms MAX6898AAZT+ shares identical die, process (BiCMOS), package (thin SOT23), and test flow with those qualified variants, establishing its automotive suitability.

How is the delay time calculated for MAX6898AAZT+ using the CDELAY pin?

For MAX6898AAZT+, delay time tDELAY is calculated as tDELAY = (CCDELAY × 4.0 × 10⁶) + 40µs, where CCDELAY is the capacitance (in farads) connected between CDELAY pin and GND. For example, a 100nF capacitor yields tDELAY ≈ 400ms. This delay applies to both IN rising above 0.5V and ENABLE going low - as MAX6898AAZT+ is an "A" version with capacitor-adjustable enable delay, unlike "P" versions with fixed 150ns propagation.

What is the maximum voltage the OUT pin of MAX6898AAZT+ can tolerate?

The OUT pin of MAX6898AAZT+ is an active-low open-drain output rated for up to 28V when in high-impedance (deasserted) state. Absolute Maximum Ratings specify "OUT, OUT (open-drain): -0.3V to +30V", confirming safe operation with pull-up voltages up to 28V. This allows direct interfacing with 5V, 12V, or 24V logic systems without external level-shifting components.

Can MAX6898AAZT+ be used with a 1.5V supply and still maintain accurate threshold detection?

Yes, MAX6898AAZT+ operates from 1.5V to 5.5V and maintains its 0.5V threshold accuracy down to the minimum supply. The datasheet explicitly states "To maintain a 1.8% accurate threshold, VCC must be above 1.5V", and Electrical Characteristics confirm VTH min/max limits apply across the full 1.5V–5.5V VCC range. At VCC = 1.5V, supply current remains at 10µA typical, making it ideal for low-voltage battery-powered applications.