Analog Devices Inc./Maxim Integrated MAX6899PAZT+T

Overview

MAX6899PAZT+T from Maxim Integrated is an ultra-small, low-power supervisory circuit with active-low enable and active-high push-pull output, designed for precise 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, provides capacitor-adjustable delay (40µs to >1s), operates from 1.5V to 5.5V, and is fully specified from –40°C to +125°C.

For engineers reviewing the MAX6899PAZT+T datasheet, MAX6899PAZT+T pinout, MAX6899PAZT+T application, or MAX6899PAZT+T equivalent, this page delivers verified functional identity, confirmed timing behavior (150ns enable-to-output propagation), package mapping (6-pin thin SOT23), real-world sequencing use cases, and two validated alternative parts with documented technical differences.

Technical Context

The MAX6899PAZT+T implements a fixed 150ns enable-to-output propagation delay (P-version), not capacitor-adjustable enable delay - distinguishing it from A-versions. Its IN pin uses a fixed 0.5V internal threshold with 5mV hysteresis, and the ENABLE pin is active-low with logic thresholds of 0.4V (VIL) and 1.4V (VIH).

It features a push-pull output referenced to VCC, delivering VOH ≥ 0.8×VCC at ISOURCE = 500µA and VOL ≤ 0.3V at ISINK = 90µA, with absolute maximum ratings supporting VCC up to 5.5V and OUT to VCC + 0.3V. The CDELAY pin sources 250nA (typ) to charge an external capacitor for input-to-output timing.

Key Specifications

Pinout & Package

MAX6899PAZT+T is housed in a 6-pin thin SOT23 package (1.60mm × 2.90mm), optimized for space-constrained PCB layouts in automotive ECUs and portable electronics.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6899AAZT+T, MAX6899PAZT+T trades delay programmability for guaranteed 150ns enable response - critical for time-critical coordination. Versus TLV809EADBZR, it delivers full sequencing capability, sub-1V monitoring, and active enable control, making it suitable for complex multi-rail systems rather than basic reset generation.

Availability

MAX6899PAZT+T is available at Aetrix Electronics and suitable for automotive power sequencing, industrial PLC reset management, medical safety monitoring, telecom line card sequencing, and critical µP supervision requiring stable component supply across extended temperature ranges.

Supply support for MAX6899PAZT+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 applications in automotive, industrial, communications, and computing markets.

The MAX6895–MAX6899 family was developed specifically for ultra-compact, low-power power-supply sequencing and supervisory control in space- and power-constrained systems operating across –40°C to +125°C.

FAQ

What is the enable-to-output propagation delay of the MAX6899PAZT+T?

The MAX6899PAZT+T has a fixed 150ns enable-to-output propagation delay (tPROPP), as confirmed in the Electrical Characteristics table under "ENABLE/ENABLE to OUT/OUT Delay" for P-version devices. This is distinct from A-versions, which use capacitor-adjustable enable delay. The 150ns value is typical and guaranteed over temperature, enabling precise timing coordination in multi-device sequencing chains. This delay applies when ENABLE transitions from high to low while IN remains above 0.5V.

Does the MAX6899PAZT+T support monitoring of voltages below 1.0V?

Yes, the MAX6899PAZT+T supports monitoring down to 0.5V via its high-impedance IN pin with a fixed internal threshold. Using an external resistive divider (e.g., R1/R2), it can accurately supervise rails such as 1.2V, 1.8V, or 2.5V. The threshold exhibits ±1.8% accuracy over –40°C to +125°C, and input hysteresis of 5mV prevents false triggering during slow voltage transitions. The IN pin draws only ±15nA, allowing use of high-value resistors without significant divider error.

What package type and dimensions does the MAX6899PAZT+T use?

The MAX6899PAZT+T uses a 6-pin thin SOT23 package measuring 1.60mm × 2.90mm, as specified in the Package Information section and Ordering Table. This ultra-compact outline is RoHS-compliant (+T suffix) and optimized for high-density PCB layouts. It shares footprint compatibility with other MAX689x variants in thin SOT23, enabling design reuse across the family. Thermal resistance θJA is 110°C/W, supporting operation at full rated power in typical 4-layer board configurations.

Can the MAX6899PAZT+T output drive a MOSFET gate directly?

Yes, the MAX6899PAZT+T's active-high push-pull output can directly drive the gate of small- to medium-size N-channel MOSFETs used in power-switching applications. With VOH ≥ 0.8×VCC at 500µA source current and VOL ≤ 0.3V at 90µA sink current, it provides sufficient voltage swing and drive strength for logic-level MOSFETs. For higher gate capacitance or faster switching, a dedicated gate driver is recommended - but for sequencing control of load switches or enable lines, direct drive is fully supported and commonly implemented.

How is the input-to-output delay configured on the MAX6899PAZT+T?

The input-to-output delay on the MAX6899PAZT+T is configured using an external capacitor (CCDELAY) connected between the CDELAY pin and GND. The internal 250nA current source charges this capacitor; when its voltage reaches 1.00V, the output asserts. Delay follows tDELAY = CCDELAY × 4.0×10⁶ + 40µs - for example, a 100nF capacitor yields ~400ms delay. This delay is independent of the fixed 150ns enable-to-output path and applies only to transitions initiated by the IN pin rising above 0.5V.