Analog Devices Inc./Maxim Integrated MAX6895AAZT+

Overview

MAX6895AAZT+ from Maxim Integrated is an ultra-small, low-power voltage supervisory circuit with adjustable threshold (0.5V) and capacitor-programmable delay, designed for power-supply sequencing and reset control in space-constrained embedded systems. It features active-high enable input, active-high push-pull output, 1.5V–5.5V supply operation, 10µA typical supply current, and -40°C to +125°C temperature range.

For engineers reviewing the MAX6895AAZT+ datasheet, MAX6895AAZT+ pinout, MAX6895AAZT+ application, or MAX6895AAZT+ equivalent, this page delivers verified technical context, real-world timing behavior, package-specific layout guidance, and validated alternative options for automotive-grade sequencing designs requiring precise 0.5V monitoring and µs-to-ms delay tuning.

Technical Context

The MAX6895AAZT+ implements a fixed 0.5V internal threshold comparator with 5mV hysteresis on its high-impedance IN pin, enabling accurate monitoring of voltages down to 0.5V via external resistive dividers. Its ENABLE pin is active-high, and output assertion follows either a capacitor-adjustable delay (t_DELAY = C_CDELAY × 4.0×10⁶ + 40µs) or a 150ns propagation delay depending on A/P variant - MAX6895AAZT+ is an "A" version, so delay is fully capacitor-programmable.

It uses a 250nA internal current source to charge an external capacitor on CDELAY, triggering output assertion when CDELAY reaches 1.00V. The push-pull output drives high to V_CC (0.8×V_CC min at 500µA) and low to ≤0.3V (at 90µA), with absolute maximum ratings supporting 6V on IN/ENABLE and 30V on open-drain variants - though MAX6895AAZT+ is push-pull, limiting OUT to V_CC + 0.3V.

Key Specifications

Pinout & Package

MAX6895AAZT+ is supplied in a thin SOT23-6 package (1.60mm × 2.90mm, 0.95mm height), optimized for high-density PCB layouts and reflow compatibility. Thermal resistance θ_JA = 110°C/W enables reliable operation at full temperature range without heatsinking.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6896AAZT+, MAX6895AAZT+ offers native active-high enable compatibility with most microcontrollers, while TLV809EADBZR sacrifices adjustability for ultra-low quiescent current and smaller footprint - making MAX6895AAZT+ the optimal choice for multi-rail sequencing where timing control and interface simplicity are essential.

Availability

MAX6895AAZT+ is available at Aetrix Electronics and suitable for automotive power management, industrial controller sequencing, and medical device reset supervision requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX6895AAZT+ 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 medical applications, emphasizing reliability, low power, and small form factor.

The MAX6895–MAX6899 family was engineered specifically for compact, high-accuracy power sequencing in harsh environments - delivering configurable delay, wide supply range, and AEC-Q100 qualification where applicable.

FAQ

What is the exact threshold voltage tolerance of the MAX6895AAZT+ over temperature?

The MAX6895AAZT+ features a 0.5V nominal threshold with ±0.9% variation (0.491V to 0.509V) across -40°C to +125°C, guaranteed by design and tested per Maxim's production flow. This 1.8% total accuracy includes initial tolerance and thermal drift - critical for consistent reset behavior in automotive engine control units where voltage rails vary with temperature.

Can the MAX6895AAZT+ monitor a 1.8V supply directly without a resistor divider?

No - the MAX6895AAZT+ has a fixed 0.5V internal threshold and cannot monitor 1.8V directly. To supervise a 1.8V rail, connect a resistive divider (e.g., R1 = 2.61MΩ, R2 = 1MΩ) to scale 1.8V down to 0.5V at the IN pin. The device's ±15nA input leakage ensures divider accuracy remains unaffected even with MΩ-scale resistors.

What is the minimum and maximum delay achievable with the CDELAY pin on the MAX6895AAZT+?

Using the formula t_DELAY = C_CDELAY × 4.0×10⁶ + 40µs, the MAX6895AAZT+ supports delays from 40µs (with C_CDELAY = 0) up to >4 seconds (e.g., 1µF yields ~4.04s). Practical limits are set by capacitor stability: X7R ceramics (100nF–1µF) provide best accuracy; electrolytics are discouraged due to leakage and aging effects.

Does the MAX6895AAZT+ require a pull-up or pull-down resistor on its OUT pin?

No - the MAX6895AAZT+ features an active-high push-pull output, which actively drives both high (to V_CC) and low (to GND). Unlike open-drain variants (e.g., MAX6897), it needs no external pull-up resistor, simplifying layout and eliminating ambiguity in power-up state when V_CC is ramping.

Is the MAX6895AAZT+ AEC-Q100 qualified for automotive use?

No - the MAX6895AAZT+ is not AEC-Q100 qualified. Only specific variants (e.g., MAX6895AAZT/V+T, MAX6896AAZT/V+, MAX6897AAZT/V+) carry AEC-Q100 qualification. For automotive applications requiring qualification, select those /V+ marked parts; MAX6895AAZT+ remains suitable for industrial and medical designs operating across -40°C to +125°C.