Analog Devices Inc./Maxim Integrated MAX6898AAZT+T

Overview

MAX6898AAZT+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 power-supply sequencing and reset control in automotive and industrial systems. It monitors input voltages down to 0.5V with ±1.8% threshold accuracy over temperature, supports 1.5V–5.5V supply, features capacitor-adjustable delay (40µs to >1s), and operates across –40°C to +125°C.

For engineers reviewing the MAX6898AAZT+T datasheet, MAX6898AAZT+T pinout, MAX6898AAZT+T application, or MAX6898AAZT+T equivalent, key selection considerations include its active-low enable logic, 28V-tolerant open-drain output, µDFN/SOT23 package compatibility, and precise 0.5V monitoring threshold with hysteresis-critical for reliable power-up sequencing in safety-critical embedded designs.

Technical Context

The MAX6898AAZT+T implements a fixed 0.5V internal reference with 5mV hysteresis for high-impedance IN monitoring, enabling accurate voltage detection via external resistive dividers. Its ENABLE pin is active-low, asserting OUT (low) only when both VIN > 0.5V and ENABLE is pulled low, with deassertion occurring immediately upon either condition failing.

Delay timing is set by an external capacitor on CDELAY, charged by a 250nA current source to a 1.0V threshold; tDELAY = CCDELAY × 4.0×10⁶ + 40µs. The open-drain OUT supports up to 28V pullup and sinks ≥90µA at VOL ≤ 0.3V (VCC ≥ 1.2V), making it suitable for level-shifting and cascaded sequencing topologies.

Key Specifications

Pinout & Package

MAX6898AAZT+T is packaged in a 6-pin thin SOT23 (1.60mm × 2.90mm) with JEDEC MO-178AC outline, optimized for space-constrained PCB layouts and compatible with standard SOT23 pick-and-place equipment.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6896AAZT+, MAX6898AAZT+T provides 28V-tolerant open-drain output essential for mixed-voltage systems, while TLV809KDBZR lacks sequencing, adjustability, and dual-rail support-making MAX6898AAZT+T uniquely suited for complex, multi-rail embedded power management.

Availability

MAX6898AAZT+T is available at Aetrix Electronics and suitable for automotive ECU power sequencing, industrial PLC supervision, medical sensor bias control, and telecom line card power management requiring stable component supply and long-term lifecycle support.

Supply support for MAX6898AAZT+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 demanding industrial, automotive, and communications applications, emphasizing reliability, small size, and low power.

The MAX6895–MAX6899 family-including MAX6898AAZT+T-is engineered for ultra-small, adjustable sequencing/supervisory functions in space- and power-constrained embedded systems where accurate voltage monitoring and flexible timing are critical.

FAQ

What is the exact threshold voltage and tolerance of the MAX6898AAZT+T?

The MAX6898AAZT+T features a fixed 0.5V internal threshold voltage with ±1.8% accuracy over the full –40°C to +125°C operating temperature range. This specification is guaranteed by design and tested across temperature, enabling precise monitoring of low-voltage rails such as 1.2V or 1.8V using standard resistor dividers without calibration.

Does the MAX6898AAZT+T support capacitor-adjustable delay on both IN-to-OUT and ENABLE-to-OUT paths?

Yes-the MAX6898AAZT+T is an "A" version device, meaning both the IN-to-OUT assertion delay and the ENABLE-to-OUT assertion delay are capacitor-adjustable via the CDELAY pin. The delay equation tDELAY = CCDELAY × 4.0×10⁶ + 40µs applies identically to both trigger conditions, providing consistent, programmable timing for sequencing and enable coordination.

What is the maximum allowable voltage on the OUT pin of the MAX6898AAZT+T?

The OUT pin of the MAX6898AAZT+T is an active-low open-drain output rated for up to 28V. When deasserted (high-impedance state), the pin can tolerate up to 28V applied via an external pullup resistor-enabling direct interfacing with higher-voltage logic domains (e.g., 12V, 24V) without level-shifting components.

Can the MAX6898AAZT+T be used in automotive applications requiring AEC-Q100 qualification?

The MAX6898AAZT+T itself is not AEC-Q100 qualified; however, the functionally identical MAX6898AAZT/V+T variant is AEC-Q100 qualified for automotive use. Both share the same electrical specifications and pinout, differing only in qualification status and packaging marking-so MAX6898AAZT/V+T should be selected for automotive-grade deployments.

What is the recommended minimum pullup resistor value for the MAX6898AAZT+T open-drain output?

For reliable low-state voltage (VOL ≤ 0.3V) with VCC ≥ 1.2V, the MAX6898AAZT+T must sink ≥90µA. With a 28V pullup, the minimum resistor is ~311kΩ (28V / 90µA). However, to ensure margin and account for leakage, a 100kΩ to 470kΩ resistor is typically recommended-lower values improve rise time but increase static power; higher values reduce power but slow switching.