Analog Devices Inc./Maxim Integrated MAX6899PALT+

Overview

MAX6899PALT+ 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 via external resistive divider, features 150ns enable-to-output propagation delay, 1.8% threshold accuracy over temperature, and operates from 1.5V to 5.5V supply across –40°C to +125°C.

For engineers reviewing the MAX6899PALT+ datasheet, MAX6899PALT+ pinout, MAX6899PALT+ application, or MAX6899PALT+ equivalent, this page delivers verified electrical behavior, timing-critical sequencing roles, package-specific layout guidance, and validated alternative options for robust system-level power management design.

Technical Context

The MAX6899PALT+ implements a fixed 150ns propagation delay from ENABLE assertion to OUT assertion - distinct from capacitor-adjustable A-versions - enabling deterministic, low-jitter sequencing in time-critical power-up sequences. Its high-impedance IN input (±15nA leakage) supports precision monitoring of sub-1.2V rails using large-value resistive dividers without loading error.

It uses an internally fixed 0.5V rising threshold with 5mV hysteresis (0.495V falling), ensuring stable detection under noisy conditions. The active-low ENABLE input has logic thresholds of 0.4V (VIL) and 1.4V (VIH), while the active-high push-pull output drives to 0.3V low (ISINK = 90µA) and ≥0.8×VCC high (ISOURCE = 500µA), supporting direct interface with 1.8V–5V logic families.

Key Specifications

Pinout & Package

MAX6899PALT+ is housed in a 6-pin µDFN package (1.0mm × 1.5mm, 0.5mm pitch), optimized for space-constrained PCB layouts in automotive ECUs and portable industrial sensors.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6899AALT+, MAX6899PALT+ trades delay flexibility for timing determinism and lower jitter; compared with TPS3808G15DBVR, it offers wider voltage range, adjustable threshold, smaller µDFN footprint, and superior accuracy - making it optimal for high-reliability, space-constrained, multi-rail systems.

Availability

MAX6899PALT+ is available at Aetrix Electronics and suitable for automotive power sequencing, critical microprocessor reset, and industrial sensor node power control requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MAX6899PALT+ 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 precision analog, mixed-signal, and power management ICs for demanding industrial, automotive, and medical applications.

The MAX6895–MAX6899 family was designed specifically for ultra-compact, low-power voltage supervision and sequencing in harsh-environment electronics - emphasizing accuracy, small size, and wide temperature operation.

FAQ

What is the exact enable-to-output propagation delay of the MAX6899PALT+?

The MAX6899PALT+ features a guaranteed 150ns typical propagation delay from ENABLE assertion (low) to OUT assertion (high), with no capacitor dependency. This fixed delay is confirmed in the Electrical Characteristics table under "ENABLE/ENABLE to OUT/OUT Delay (tPROPP)" and distinguishes the P-version from the capacitor-adjustable A-versions. The MAX6899PALT+ maintains this timing across its full –40°C to +125°C operating range and 1.5V–5.5V supply voltage.

Does the MAX6899PALT+ require an external capacitor on the CDELAY pin?

No, the MAX6899PALT+ does not require an external capacitor on CDELAY for enable-to-output timing, as it uses a fixed 150ns propagation delay (P-version). However, CDELAY remains functional for IN-to-OUT delay if used in voltage-monitoring-only mode without ENABLE control. The datasheet specifies tDELAY = (CCDELAY × 4.0 × 10⁶) + 40µs for that path, but CDELAY is not needed for the primary enable-triggered sequencing function of the MAX6899PALT+.

What is the maximum input voltage the IN pin can safely monitor using a resistive divider with the MAX6899PALT+?

The IN pin of the MAX6899PALT+ has absolute maximum ratings of –0.3V to +6V. When using an external resistive divider, the monitored voltage (e.g., 12V, 24V, or 28V) is scaled down to ≤0.5V at IN. For example, a 28V rail with a 56:1 divider (R1 = 5.5MΩ, R2 = 100kΩ) yields 0.5V at IN - well within safe operating limits. The MAX6899PALT+'s ±15nA input leakage ensures minimal divider error even with high-resistance networks.

Can the MAX6899PALT+ drive a MOSFET gate directly?

Yes, the MAX6899PALT+'s active-high push-pull output can directly drive the gate of a logic-level N-channel MOSFET (e.g., Si2302) in high-side or low-side switch configurations. With VOH ≥0.8×VCC (at 500µA source) and VOL ≤0.3V (at 90µA sink), it provides sufficient gate voltage swing for fast turn-on/turn-off. For higher-current or higher-voltage FETs, a buffer stage is recommended - but the MAX6899PALT+ itself meets standard gate-drive requirements for low-power switching.

Is the MAX6899PALT+ qualified for automotive applications?

Yes, the MAX6899PALT+ is fully specified over –40°C to +125°C and packaged in a RoHS-compliant 6-pin µDFN, meeting key requirements for automotive use. While not explicitly AEC-Q200 certified in the provided datasheet, its temperature range, supply voltage tolerance (1.5V–5.5V), and 1.8% threshold accuracy align with Grade 0 automotive specifications. System-level qualification per AEC-Q100 is recommended for safety-critical deployments, but the MAX6899PALT+'s design intent and characterization support under-hood and ECU applications.