Analog Devices Inc./Maxim Integrated MAX16154DBAA+T

Overview

MAX16154DBAA+T from Analog Devices is a nanoPower supervisory circuit with integrated watchdog timer, designed to monitor single-supply voltage (1.2V–5.5V) and detect microcontroller code execution faults in ultra-low-power systems. It features a factory-trimmed 3.3V reset threshold (±2.5% accuracy), 128ms reset timeout, 100ms watchdog startup delay, and 1s watchdog timeout - all operating across –40°C to +125°C. Used in glucose monitors and portable medical devices where supply stability and firmware integrity are critical.

For engineers reviewing the MAX16154DBAA+T datasheet, MAX16154DBAA+T pinout, MAX16154DBAA+T application, or MAX16154DBAA+T equivalent, key selection criteria include its 400nA typical supply current, WD_EN logic-controlled watchdog enable, open-drain RST/WDO outputs, 6-bump WLP package (0.86mm × 1.27mm), and guaranteed operation over automotive-grade temperature range.

Technical Context

The MAX16154DBAA+T implements a dual-monitoring architecture: a precision voltage reference compares VCC against a 3.3V threshold with 0.4% hysteresis, while a digital watchdog timer clears on each valid WDI edge and asserts WDO low for 100–300ms upon timeout. Its reset assertion timing includes a fixed 128ms timeout after VCC exceeds VTH + VHYS.

Watchdog functionality is gated by the WD_EN input: a logic-high enables monitoring after 300μs setup time; logic-low disables WDI evaluation entirely. Unlike MAX16152/53, it lacks MR but provides deterministic watchdog control - essential for safety-critical firmware validation in battery-powered diagnostics equipment.

Key Specifications

Pinout & Package

MAX16154DBAA+T uses a 0.86mm × 1.27mm, 6-bump Wafer-Level Package (WLP) with bottom-side solder bumps. The package is RoHS-compliant and optimized for space-constrained PCB layouts in portable medical and IoT endpoints.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX16154DBAA+T, MAX16155DBAB+T offers identical supervision functionality in a larger, rework-friendly package, while TPS3808G33DBVR trades nanoPower efficiency and WD_EN flexibility for simpler implementation in non-safety-critical consumer wearables.

Availability

MAX16154DBAA+T is available at Aetrix Electronics and suitable for glucose monitors, portable ECG devices, and smart inhaler trackers requiring stable component supply across extended product lifecycles and stringent medical regulatory timelines.

Supply support for MAX16154DBAA+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

Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.

The MAX1615x family delivers ultra-low-power supervision for battery-operated medical and portable electronics - prioritizing sub-μA quiescent current, wide temperature resilience, and deterministic watchdog behavior over feature bloat.

FAQ

What is the factory-set reset threshold voltage for MAX16154DBAA+T?

The MAX16154DBAA+T has a factory-trimmed reset threshold of 3.3V with ±2.5% accuracy across –40°C to +125°C. This value is laser-trimmed during production and cannot be adjusted externally. The 3.3V threshold aligns precisely with standard microcontroller I/O rail voltages, eliminating need for external resistor dividers. All electrical testing and qualification of MAX16154DBAA+T assumes this fixed VTH.

How does the WD_EN pin affect watchdog behavior in MAX16154DBAA+T?

In MAX16154DBAA+T, WD_EN is an active-high enable input that gates the entire watchdog function. When WD_EN is low, the internal timer is disabled and WDI transitions are ignored - no WDO assertion occurs regardless of WDI state. When WD_EN is driven high, the watchdog starts after a 300μs setup time and begins monitoring WDI edges. This hardware control allows safe disabling during bootloader execution or low-power sleep modes in MAX16154DBAA+T designs.

What is the guaranteed reset timeout period for MAX16154DBAA+T?

The MAX16154DBAA+T guarantees a minimum reset timeout period of 128ms after VCC rises above the 3.3V threshold plus hysteresis. This value is specified in the Selector Guide and confirmed in the Electrical Characteristics table under "Reset Timeout Period Accuracy" (±50%). The 128ms duration ensures sufficient time for microcontrollers to complete internal PLL locking and register initialization before RST deassertion in MAX16154DBAA+T applications.

Can MAX16154DBAA+T operate from a 1.5V supply?

Yes, MAX16154DBAA+T operates from 1.2V to 5.5V, so 1.5V is within its valid supply range. However, at 1.5V, the 3.3V reset threshold cannot be monitored - the device will assert RST continuously since VCC remains below VTH. For proper supervision, VCC must exceed the reset threshold; thus MAX16154DBAA+T is intended for use on rails ≥3.3V or with external voltage scaling. Its 1.2V minimum VCC supports operation as a standalone supervisor only when VCC ≥ VTH.

What package type and dimensions does MAX16154DBAA+T use?

MAX16154DBAA+T uses a 6-bump Wafer-Level Package (WLP) measuring 0.86mm × 1.27mm with 0.4mm bump pitch. This ultra-compact package is specified in Analog Devices' package outline 21-100258 and land pattern 90-0175. It is RoHS-compliant (indicated by "+" in the part suffix) and optimized for high-density PCB layouts in space-constrained medical wearables - distinct from the SOT23-6 option used in MAX16155 variants.