Analog Devices Inc./Maxim Integrated MAX16061ETP+T

Overview

MAX16061ETP+T from Maxim Integrated is a 1% accurate, hex-voltage microprocessor supervisor IC in a 20-pin thin QFN (4mm × 4mm) package, designed for multivoltage system monitoring. It monitors six independent supply rails (e.g., 3.3V, 2.5V, 1.8V, and adjustable down to 0.373V), provides six open-drain voltage-monitor outputs with internal 30µA pullups, and asserts a shared active-low RESET output when any monitored voltage falls below its threshold or upon manual reset assertion. It is used in server power sequencing, telecom equipment supervision, and automotive infotainment power management.

For engineers reviewing the MAX16061ETP+T datasheet, MAX16061ETP+T pinout, MAX16061ETP+T application, or MAX16061ETP+T equivalent, key selection criteria include its 1% threshold accuracy over –40°C to +125°C, capacitor-adjustable reset timeout (min 140ms), integrated watchdog timer (1.6s typ), margin enable function, and tolerance-selectable 5%/10% input thresholds.

Technical Context

The MAX16061ETP+T implements six independent voltage comparators with hysteresis (0.5% of threshold), each feeding an open-drain output with internal 30µA pullup to VCC. Its RESET output combines OR logic across all six monitor channels and the manual reset (MR) input, with a reset timeout determined either by internal 140ms minimum or externally via SRT-to-GND capacitor (t_RP = 2.06 MΩ × C_SRT).

It integrates a watchdog timer with 54s startup delay and 1.6s typical timeout, disabled by leaving WDI floating; a TOL pin selects 5% or 10% threshold tolerance; and a MARGIN pin allows simultaneous deassertion of all outputs during margin testing. All outputs remain functional down to VCC = 1V, supporting low-voltage system operation.

Key Specifications

Pinout & Package

MAX16061ETP+T is housed in a 20-pin thin QFN package (4mm × 4mm, 0.5mm pitch) with exposed pad (EP) internally connected to GND. Thermal performance is optimized by soldering EP to PCB ground plane.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar hex-voltage supervisor applications.

Compared with TPS3307-18-33-30 and ADM1066ASTZ, MAX16061ETP+T delivers true hex-channel autonomy, factory-configurable thresholds, and integrated watchdog - eliminating both external components and host dependency while maintaining pin-level compatibility within its own family.

Availability

MAX16061ETP+T is available at Aetrix Electronics and suitable for server power sequencing, telecom line card supervision, and automotive infotainment power management requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX16061ETP+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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for demanding industrial, automotive, and communications applications.

The MAX16060/MAX16061/MAX16062 family was designed specifically for compact, high-accuracy multivoltage supervision in space- and reliability-critical systems - emphasizing 1% threshold stability, wide temperature operation, and minimal external component count.

FAQ

What is the function of the TOL pin on the MAX16061ETP+T?

The TOL pin on the MAX16061ETP+T selects input threshold tolerance: connecting it to GND configures 5% tolerance for precision rails, while connecting it to VCC sets 10% tolerance for less-regulated supplies. This single-pin flexibility allows one MAX16061ETP+T variant to serve diverse power architectures without redesign. The tolerance setting applies uniformly across all six monitored inputs and is fully specified over –40°C to +125°C.

Can the MAX16061ETP+T monitor voltages below 1.0V?

Yes, the MAX16061ETP+T can monitor voltages as low as 0.373V (with TOL = VCC) using its adjustable-input channels (IN1–IN6). This is achieved via external resistor dividers - for example, to monitor a 0.85V core rail, a divider scales it to ~0.373V at the INx pin. The device maintains 1% accuracy on the scaled threshold, and all comparator hysteresis and propagation delay specs remain valid down to VCC = 1.0V.

How does the watchdog timer behave during power-up on the MAX16061ETP+T?

The MAX16061ETP+T watchdog timer enters a 54-second startup delay after VCC rises above UVLO (1.8V typ), during which no timeout occurs regardless of WDI state. This prevents spurious resets during slow-ramping or multi-stage power supplies. After startup, the timer resets on every WDI edge and times out after 1.12s–2.40s (typ 1.6s) if no edge occurs. Leaving WDI unconnected disables the timer entirely via an internal 400nA detector.

Is an external pullup resistor required for the RESET output of the MAX16061ETP+T?

No external pullup resistor is required for the RESET output of the MAX16061ETP+T because it features an internal 30µA pullup to VCC. This suffices for driving standard CMOS inputs (e.g., microcontroller nRST pins) operating at VCC or lower. However, if interfacing to a higher-voltage logic domain (e.g., 5V MCU with 3.3V VCC), an external pullup to that higher voltage is needed - the internal pullup is overridden safely, with reverse-current protection preventing VCC contamination.

What happens to the outputs of the MAX16061ETP+T when VCC drops below 1.0V?

Per Absolute Maximum Ratings and Electrical Characteristics, all outputs (OUT1–OUT6 and RESET) of the MAX16061ETP+T are guaranteed to remain asserted (low) down to VCC = 1.0V. Below this, behavior is not specified - but within the rated 1.0V–5.5V range, the device maintains valid supervision, including threshold comparison, reset timeout timing, and open-drain output drive strength. This ensures fail-safe reset assertion during brownout conditions common in automotive and industrial environments.