Analog Devices Inc./Maxim Integrated MAX6898AALT+T

Overview

The MAX6898AALT+T 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 precise power-supply sequencing and reset control in space-constrained systems. It monitors input voltages down to 0.5V with ±1.8% threshold accuracy over temperature, supports capacitor-adjustable delay (40µs to >4s), operates from 1.5V to 5.5V supply, and is fully specified from –40°C to +125°C.

For engineers reviewing the MAX6898AALT+T datasheet, MAX6898AALT+T pinout, MAX6898AALT+T application, or MAX6898AALT+T equivalent, this page delivers verified functional identity, confirmed µDFN-6 package mapping, validated terminal roles, real timing behavior (tPROPA = 20µs to 190ms), and two rigorously confirmed alternative parts - all extracted from Maxim's official documentation and ordering guide.

Technical Context

The MAX6898AALT+T implements a fixed 0.5V internal reference with 5mV hysteresis, enabling accurate monitoring of external rail voltages via resistive dividers. Its active-low ENABLE input deasserts the output within 150ns when high, and its active-low open-drain OUT requires an external pullup and tolerates up to 28V.

Delay timing is governed by an internal 250nA current source charging an external capacitor (CCDELAY) from CDELAY to GND; tDELAY = (CCDELAY × 4.0 × 10⁶) + 40µs. The device features 10µA typical supply current, 1.5V–5.5V VCC operation, and guaranteed functionality across automotive-grade temperature range.

Key Specifications

Pinout & Package

MAX6898AALT+T is housed in a 6-pin ultra-small µDFN package (1.0mm × 1.5mm, 0.5mm pitch), optimized for high-density PCB layouts and thermal performance (θJA = 477°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6896AALT+, the MAX6898AALT+T provides 28V-tolerant open-drain output for mixed-voltage interfacing, while compared with MAX6898AAZT+, it offers 68% smaller footprint and superior thermal resistance - critical for thermally constrained automotive and portable designs.

Availability

MAX6898AALT+T is available at Aetrix Electronics and suitable for power-supply sequencing, microcontroller reset control, and industrial sensor node power management requiring stable component supply, long-term lifecycle support, and AEC-Q100-aligned reliability.

Supply support for MAX6898AALT+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) is a semiconductor company specializing in analog and mixed-signal ICs for power, sensing, and interface applications.

The MAX6895–MAX6899 family was designed to deliver ultra-small, low-power, and highly flexible voltage supervision and sequencing capability for space- and power-constrained embedded systems across automotive, industrial, and computing markets.

FAQ

What is the exact function of the CDELAY pin on the MAX6898AALT+T?

The CDELAY pin on the MAX6898AALT+T connects to an external capacitor (CCDELAY) tied to GND and serves as the timing node for the capacitor-adjustable delay function. An internal 250nA current source charges CCDELAY until it reaches 1.0V, triggering output assertion. The delay follows tDELAY = (CCDELAY × 4.0 × 10⁶) + 40µs. This mechanism allows precise, user-configurable sequencing windows without external timers. The MAX6898AALT+T relies on this pin for both IN-to-OUT and ENABLE-to-OUT delay timing.

Does the MAX6898AALT+T support operation below 1.5V supply voltage?

No, the MAX6898AALT+T requires a minimum VCC of 1.5V to guarantee correct operation. Below 1.5V, the internal 0.5V threshold reference and comparator may not function reliably. At VCC < 1.2V, the output state becomes indeterminate per the datasheet's Absolute Maximum Ratings section. For applications with sub-1.5V supplies, the MAX6898AALT+T is not suitable - designers must ensure stable VCC ≥ 1.5V before relying on MAX6898AALT+T supervision behavior.

Can the MAX6898AALT+T monitor a 12V rail directly?

No, the MAX6898AALT+T cannot monitor a 12V rail directly at its IN pin, which has absolute maximum rating of +6V. To supervise 12V, an external resistive divider must scale the voltage so that the voltage at IN remains ≤ 6V and crosses the 0.5V threshold at the desired trip point (e.g., use R1/R2 to map 12V → 0.5V). The MAX6898AALT+T's high-impedance IN input (±15nA leakage) permits use of high-value resistors, minimizing divider current. The 28V-tolerant OUT pin does not extend to the IN pin.

What is the maximum sink current capability of the MAX6898AALT+T's open-drain output?

The MAX6898AALT+T's open-drain OUT pin is rated for ±20mA continuous current per pin, with VOL ≤ 0.3V at ISINK = 90µA (VCC ≥ 1.2V) and ≤ 0.4V at ISINK = 1mA (VCC ≥ 4.5V). Its 28V tolerance applies to voltage, not current - actual sink current depends on external pullup voltage and resistor value. For example, with a 12V pullup and 24kΩ resistor, sink current is ~0.5mA. The MAX6898AALT+T datasheet specifies these limits across temperature and supply conditions.

Is the MAX6898AALT+T pin-compatible with other members of the MAX6895–MAX6899 family?

Yes, all MAX6895–MAX6899 devices, including the MAX6898AALT+T, share identical 6-pin µDFN and thin SOT23 pinouts and terminal functions. Pin 1 is ENABLE, Pin 2 is GND, Pin 3 is IN, Pin 4 is OUT, Pin 5 is CDELAY, and Pin 6 is VCC across the entire family. This allows drop-in replacement between variants (e.g., MAX6898AALT+T ↔ MAX6896AALT+) when only enable polarity or output type differs - though system-level logic compatibility (e.g., open-drain vs. push-pull) must still be verified.