Analog Devices Inc./Maxim Integrated MAX16154DBAD+

Overview

MAX16154DBAD+ from Analog Devices is a nanoPower supervisory circuit with integrated watchdog timer, designed for ultra-low-power microcontroller-based systems. It monitors a single supply (1.2V–5.5V), asserts an open-drain reset (RST) when VCC drops below 3.3V ±2.5%, and provides a watchdog output (WDO) pulse (100–300ms) upon code execution failure. Its 400nA typical supply current and 6-bump WLP package support battery-powered medical and portable devices.

For engineers reviewing the MAX16154DBAD+ datasheet, MAX16154DBAD+ pinout, MAX16154DBAD+ application, or MAX16154DBAD+ equivalent, this page delivers verified electrical parameters, validated WLP pin mapping, confirmed watchdog enable logic behavior, and real-world use cases in glucose monitors and e-readers - all grounded in Analog Devices' official documentation.

Technical Context

The MAX16154DBAD+ implements a factory-trimmed 3.3V reset threshold with ±2.5% accuracy over –40°C to +125°C and 0.4% hysteresis, ensuring stable reset assertion/deassertion during supply transients. Its watchdog circuit requires periodic WDI toggling within a nominal 32s timeout period and features a 16s startup delay before monitoring begins.

A dedicated active-high WD_EN input enables/disables the watchdog function with ≤300μs setup time; when WD_EN is low, WDI transitions are ignored and WDO remains deasserted. The device uses an internal voltage reference and transition detector to decouple reset timing from VCC rise rate, delivering deterministic tRP (128ms min) independent of power-up slew.

Key Specifications

Pinout & Package

MAX16154DBAD+ is housed in a 0.86mm × 1.27mm, 6-bump wafer-level package (WLP) with solder bumps on bottom side for board-level mounting. The package is RoHS-compliant and rated for –40°C to +125°C operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX16154DBAD+, the MAX16155DBAB+T offers identical electrical behavior in a more manufacturable SOT23 package, while the TPS3808G33DBVR trades WD_EN flexibility and WLP size for lower cost and slightly lower ICC - making it viable only in fixed-function, non-upgradable embedded designs.

Availability

MAX16154DBAD+ is available at Aetrix Electronics and suitable for portable medical devices, battery-powered IoT endpoints, and industrial data loggers requiring stable component supply across extended product lifecycles.

Supply support for MAX16154DBAD+ 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 precision instrumentation, industrial automation, and healthcare markets.

The MAX16154DBAD+ belongs to Analog Devices' nanoPower supervisor family, engineered specifically for energy-constrained applications where sub-1µA quiescent current, guaranteed reset timing, and configurable watchdog supervision are mandatory.

FAQ

What is the factory-set reset threshold voltage for MAX16154DBAD+?

The MAX16154DBAD+ has a factory-trimmed reset threshold of 3.3V with ±2.5% accuracy across –40°C to +125°C and the full 1.2V–5.5V supply range. This value is permanently set during production and cannot be adjusted externally. The 3.3V threshold aligns with common microcontroller I/O voltage domains and eliminates the need for external resistor networks. All MAX16154DBAD+ units shipped meet this specification per Analog Devices' production test data.

Does MAX16154DBAD+ support disabling the watchdog function during operation?

Yes, MAX16154DBAD+ supports runtime watchdog disable via its dedicated WD_EN pin. Driving WD_EN low disables the watchdog timer entirely - WDI transitions are ignored, and WDO remains deasserted regardless of software behavior. When WD_EN is driven high, the watchdog resumes monitoring after a maximum 300μs setup time. This feature enables safe firmware updates or debug sessions without risking unintended resets.

What is the minimum reset timeout period for MAX16154DBAD+?

The minimum reset timeout period (tRP) for MAX16154DBAD+ is 128ms. After VCC rises above the 3.3V threshold plus hysteresis, RST remains asserted for at least 128ms before deasserting. This guaranteed minimum ensures sufficient hold time for microcontrollers with slow clock startup or external memory initialization. The actual timeout may vary slightly due to process variation but will never fall below 128ms under specified operating conditions.

What package type and dimensions does MAX16154DBAD+ use?

MAX16154DBAD+ uses a 6-bump wafer-level package (WLP) measuring 0.86mm × 1.27mm with a 0.4mm bump pitch. It is a bottom-terminated surface-mount device with solder bumps replacing leads, optimized for ultra-compact PCB layouts in space-constrained applications like hearing aids and wearable biosensors. The package is RoHS-compliant and rated for operation from –40°C to +125°C.

How does the watchdog startup delay work in MAX16154DBAD+?

MAX16154DBAD+ features a factory-set 16s nominal watchdog startup delay. This delay begins after RST deasserts and ensures the watchdog timer does not activate until the microcontroller has fully initialized its peripherals and watchdog service routines. Monitoring of WDI starts only after this 16s window expires - or immediately after WD_EN is driven high, if WD_EN is asserted later. This prevents false timeouts during boot.