Analog Devices Inc./Maxim Integrated MAX6899PALT+T

Overview

MAX6899PALT+T from Maxim Integrated is an ultra-small, low-power supervisory circuit with adjustable voltage monitoring (0.5V threshold), active-low enable input, and active-high push-pull output. It provides capacitor-adjustable delay for IN-to-OUT assertion and a fixed 150ns propagation delay from ENABLE assertion to OUT assertion. Designed for power-supply sequencing in automotive and industrial systems operating from -40°C to +125°C.

For engineers reviewing the MAX6899PALT+T datasheet, MAX6899PALT+T pinout, MAX6899PALT+T application, or MAX6899PALT+T equivalent, key selection criteria include its 150ns enable-to-output delay, 0.5V monitor threshold with 1.8% accuracy over temperature, 1.5V–5.5V supply range, 6-pin µDFN package, and compatibility with cascaded sequencing architectures.

Technical Context

The MAX6899PALT+T implements a fixed 150ns propagation delay from ENABLE assertion to OUT assertion - distinct from the capacitor-adjustable delay versions (A suffix). Its high-impedance IN input monitors external voltages via resistive dividers, with a precise 0.5V rising threshold and 5mV hysteresis. The device asserts OUT high only when both VIN > 0.5V and ENABLE is low (active-low logic), after the fixed 150ns delay.

VCC operates from 1.5V to 5.5V, with undervoltage lockout at 1.20–1.35V and typical supply current of 10µA. The push-pull output drives to VCC (VOH ≥ 0.8×VCC) with VOL ≤ 0.3V at 90µA sink, enabling direct interface with MCU reset inputs or MOSFET gate drivers without external pullups.

Key Specifications

Pinout & Package

MAX6899PALT+T is housed in a 6-pin µDFN package (1.0mm × 1.5mm, 0.5mm pitch) with wettable flanks, optimized for automated optical inspection and high-density layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6899AALT+T, MAX6899PALT+T trades delay flexibility for guaranteed 150ns response time and reduced external component count; versus TLV803EB29DBVR, it adds active enable control, 0.5V threshold adjustability, and cascading capability - making it uniquely suited for complex, low-voltage power sequencing.

Availability

MAX6899PALT+T is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLCs, portable medical devices, and FPGA power management systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX6899PALT+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, and communications markets.

The MAX6895–MAX6899 family was engineered specifically for ultra-compact, low-power voltage supervision and sequencing in space- and power-constrained systems - emphasizing accuracy, speed, and thermal robustness over wide temperature ranges.

FAQ

What is the enable-to-output propagation delay for MAX6899PALT+T?

The MAX6899PALT+T features a fixed 150ns propagation delay from ENABLE assertion (low) to OUT assertion (high). This is a key differentiator from the 'A' version (e.g., MAX6899AALT+T), which uses capacitor-adjustable delay. The 150ns specification is guaranteed over -40°C to +125°C and independent of external components, ensuring deterministic timing in critical sequencing paths.

Does MAX6899PALT+T require an external capacitor for basic enable-controlled operation?

No - MAX6899PALT+T does not require an external capacitor on CDELAY for ENABLE-triggered output assertion, since it uses a fixed 150ns propagation delay. The CDELAY pin is only used to set the IN-to-OUT delay (e.g., for power-on timing), and may be left unconnected if only ENABLE-controlled sequencing is needed. This simplifies layout and reduces BOM count compared to adjustable-delay variants.

What is the absolute maximum voltage rating for the OUT pin of MAX6899PALT+T?

The OUT pin of MAX6899PALT+T is rated for −0.3V to (VCC + 0.3V) when configured as a push-pull output. Since MAX6899PALT+T has an active-high push-pull output, it is not 28V-tolerant like open-drain versions (e.g., MAX6897/MAX6898). Exceeding VCC + 0.3V on OUT may cause damage; proper decoupling and voltage rail coordination are essential in multi-supply systems.

Can MAX6899PALT+T monitor a 1.2V supply directly?

Yes - MAX6899PALT+T monitors via an external resistive divider connected to the IN pin. With a fixed 0.5V internal threshold, a 1.2V rail can be monitored using R1 = 1.4MΩ and R2 = 1MΩ (per VMONITOR = VTH × (R1/R2 + 1)). The ±15nA IN leakage ensures minimal divider error, and the 1.8% threshold accuracy over temperature guarantees reliable detection across the full operating range.

Is MAX6899PALT+T qualified for automotive applications?

MAX6899PALT+T is not explicitly AEC-Q100 qualified per the datasheet - only MAX6895AAZT/V+T, MAX6896AAZT/V+T, and MAX6897AAZT/V+ are listed as AEC-Q100 qualified. However, MAX6899PALT+T shares the same −40°C to +125°C operating range, BiCMOS process, and package construction, making it suitable for non-certified automotive subsystems where full qualification is not mandated.