Analog Devices Inc./Maxim Integrated MAX6897AAZT/V+T

Overview

MAX6897AAZT/V+T from Maxim Integrated is an automotive-grade, ultra-small supervisory circuit with adjustable voltage monitoring (0.5V threshold), capacitor-programmable delay, active-high enable input, and active-high open-drain output rated to 28V. It operates from 1.5V to 5.5V supply, draws only 10µA typical current, and is fully specified over –40°C to +125°C for power-supply sequencing in safety-critical automotive ECUs.

For engineers reviewing the MAX6897AAZT/V+T datasheet, MAX6897AAZT/V+T pinout, MAX6897AAZT/V+T application, or MAX6897AAZT/V+T equivalent, key selection considerations include its AEC-Q100 qualification, 28V-tolerant open-drain output, 1.8% threshold accuracy over temperature, and µDFN/SOT23 package compatibility with space-constrained automotive timing and reset management systems.

Technical Context

The MAX6897AAZT/V+T implements a fixed 0.5V internal reference with 5mV hysteresis for high-impedance IN monitoring, enabling precise external voltage detection via resistive dividers. Its ENABLE input is active-high, and output assertion follows a capacitor-adjustable delay (t_DELAY = C_CDELAY × 4.0×10⁶ + 40µs) after both VIN > 0.5V and ENABLE high are satisfied.

When VIN falls below 0.495V or ENABLE goes low, the open-drain OUT deasserts immediately (16µs max propagation), supporting fast fault response. The device uses BiCMOS process technology, features ±15nA IN leakage, and maintains 1.8% threshold accuracy across –40°C to +125°C without external calibration.

Key Specifications

Pinout & Package

MAX6897AAZT/V+T is packaged in a 6-pin thin SOT23 (1.60mm × 2.90mm) with exposed pad for thermal performance. Pin 1 is ENABLE, Pin 2 is GND, Pin 3 is IN, Pin 4 is OUT, Pin 5 is CDELAY, and Pin 6 is VCC - matching JEDEC MO-178AB outline and land pattern 90-0242.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6897AALT+, the MAX6897AAZT/V+T offers easier assembly and better thermal performance in SOT23, while TLV809EADBZR trades sequencing capability for lower unit cost and simpler BOM - neither provides AEC-Q100 qualification or 28V-tolerant output.

Availability

MAX6897AAZT/V+T is available at Aetrix Electronics and suitable for automotive ECU power sequencing, industrial PLC reset supervision, and medical battery monitoring requiring stable component supply with long-term lifecycle assurance.

Supply support for MAX6897AAZT/V+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, mixed-signal, and power management ICs for automotive, industrial, and computing applications - emphasizing reliability, integration, and AEC-Q100 compliance.

The MAX6895–MAX6899 family was engineered specifically for compact, low-power voltage sequencing and supervisory functions in harsh-environment systems - delivering adjustable thresholds, capacitor-based timing, and automotive-grade robustness in sub-2mm packages.

FAQ

What is the maximum voltage rating for the open-drain output of MAX6897AAZT/V+T?

The MAX6897AAZT/V+T open-drain output is rated to 28V, meaning it can safely sink current when pulled up to any voltage ≤28V - enabling direct interface with 12V or 24V system rails without external level-shifting components. This rating is absolute maximum; sustained operation above VCC requires appropriate pullup resistor sizing to limit sink current per Electrical Characteristics table limits.

Does MAX6897AAZT/V+T require an external pullup resistor on the OUT pin?

Yes, MAX6897AAZT/V+T requires an external pullup resistor on the OUT pin because it features an active-high open-drain output. Without a pullup, the output remains floating and cannot assert a valid high logic level. Typical values range from 10kΩ (for fast rise time) to 100kΩ (for low power), selected based on pullup voltage and required sink current per the Electrical Characteristics table.

How is the delay time calculated for MAX6897AAZT/V+T using the CDELAY capacitor?

The delay time for MAX6897AAZT/V+T is calculated as t_DELAY = C_CDELAY × 4.0×10⁶ + 40µs, where C_CDELAY is the capacitance (in farads) connected from Pin 5 (CDELAY) to GND. For example, a 0.047µF capacitor yields ~190ms delay. This equation applies to both IN→OUT and ENABLE→OUT assertion, as MAX6897 is an "A" version with capacitor-adjustable enable delay.

Is MAX6897AAZT/V+T pin-compatible with other devices in the MAX6895–MAX6899 family?

MAX6897AAZT/V+T shares identical pinout and package (6-pin thin SOT23) with all other MAX6895–MAX6899 variants in the same package option, including MAX6895AAZT/V+T and MAX6896AAZT/V+T. However, functional differences - such as enable polarity, output type, and delay architecture - mean direct substitution requires verification of logic compatibility and timing requirements in the target circuit.

What does the "/V+T" suffix indicate in MAX6897AAZT/V+T?

The "/V+T" suffix in MAX6897AAZT/V+T denotes AEC-Q100 qualification ("V"), RoHS-compliant lead-free packaging ("+"), and tape-and-reel delivery ("T"). This confirms the part meets automotive reliability standards, uses environmentally compliant materials, and ships in industry-standard packaging for automated SMT assembly - distinguishing it from commercial-grade variants like MAX6897AAZT+.