Analog Devices Inc./Maxim Integrated MAX16001ETE+T

Overview

MAX16001ETE+T from Maxim Integrated is a quad-voltage microprocessor supervisor IC in a 16-pin TQFN (4mm × 4mm) package, monitoring four independent supply rails (e.g., 3.3V, 2.5V, 1.8V, and adjustable down to 0.4V) with ±5% or ±10% threshold tolerance selection, 140ms minimum reset timeout, and integrated watchdog timer (1.6s typical timeout). It serves as system-level power integrity guardian in multivoltage server and storage platforms.

For engineers reviewing the MAX16001ETE+T datasheet, MAX16001ETE+T pinout, MAX16001ETE+T application, or MAX16001ETE+T equivalent, key selection criteria include its four-channel independent voltage monitoring capability, open-drain outputs with internal 30µA pullups, manual reset (MR) and margin enable (MARGIN) inputs, watchdog timer with 54s startup delay, and guaranteed operation down to VCC = 1V - all validated across –40°C to +125°C.

Technical Context

The MAX16001ETE+T implements a fixed-threshold supervisory architecture with selectable 5%/10% hysteresis via the TOL pin, and supports both capacitor-adjustable (via SRT pin) and internally fixed (140ms min) reset timeout. Its RESET output asserts low if any monitored voltage falls below threshold or MR is pulled low, holding for the full timeout after recovery.

It integrates a watchdog timer with WDI input that triggers RESET assertion upon timeout (1.12–2.40s), includes a 54s startup delay after reset release, and features MARGIN input to force all outputs high during system margin testing - all while consuming only 45–70µA supply current over temperature and supply range.

Key Specifications

Pinout & Package

MAX16001ETE+T uses a 16-pin TQFN (4mm × 4mm) package with exposed thermal pad (EP) internally connected to GND. Pin 1 is IN1 (first monitored voltage input); pins 9–12 are OUT1–OUT4 (open-drain outputs with internal 30µA pullups); pin 13 is RESET (active-low reset output); pin 14 is WDI (watchdog input); pin 15 is MR (active-low manual reset); pin 16 is MARGIN (active-low margin disable).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX16001ATE+T, the MAX16001ETE+T omits AEC-Q100 qualification but retains identical performance and footprint for industrial environments; compared with TPS3808G33DBVR, it provides four independent monitoring channels, watchdog, and margin control - making it suitable for complex multivoltage systems where TPS3808G33DBVR cannot scale.

Availability

MAX16001ETE+T is available at Aetrix Electronics and suitable for storage equipment, servers, and networking/telecommunication equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX16001ETE+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 demanding industrial, computing, and communications applications.

The MAX16000–MAX16007 family was engineered specifically for robust, low-power supervision of multivoltage systems in servers, storage, and telecom infrastructure - emphasizing reliability across –40°C to +125°C and minimizing external components.

FAQ

What is the primary function of the MAX16001ETE+T in a system?

The MAX16001ETE+T functions as a quad-voltage microprocessor supervisor that independently monitors four supply rails (e.g., 3.3V, 2.5V, 1.8V, and an adjustable rail), asserts RESET if any falls out of spec, and integrates a watchdog timer. In systems using MAX16001ETE+T, it ensures safe power-up, brownout protection, and firmware health monitoring - critical for servers and storage where uncontrolled resets risk data loss.

Does the MAX16001ETE+T support adjustable reset timeout, and how is it configured?

Yes, the MAX16001ETE+T supports adjustable reset timeout via the SRT pin. Connecting an external capacitor between SRT and GND sets the timeout per the formula: Reset Timeout (s) = 2.06 × 10⁶ Ω × CSRT (F). With CSRT = 1500pF, timeout is 2.43–3.92ms; leaving SRT open yields ~50µs; connecting SRT to VCC selects the internal 140ms minimum. This flexibility enables precise alignment with system power-up sequencing in MAX16001ETE+T deployments.

How does the watchdog timer in the MAX16001ETE+T behave during system startup?

The MAX16001ETE+T watchdog timer includes a 54-second startup delay after RESET deassertion, allowing firmware sufficient time to initialize and begin issuing WDI pulses before timeout monitoring begins. If no WDI edge occurs within 54s, RESET asserts. This behavior prevents false resets during boot and is intrinsic to MAX16001ETE+T's design - unlike MAX16005, which lacks this delay.

Can the MAX16001ETE+T monitor voltages below 1.0V, and what is the lowest supported threshold?

Yes, the MAX16001ETE+T supports adjustable monitoring down to 0.366V (min) when TOL = VCC, or 0.388V (min) when TOL = GND - verified across temperature and supply. This enables supervision of modern low-voltage rails such as 0.9V, 0.8V, or custom sub-1V domains. The adjustable threshold capability is a defined feature of MAX16001ETE+T and applies directly to its IN1–IN4 inputs.

What is the role of the MARGIN pin on the MAX16001ETE+T, and how is it used in production testing?

The MARGIN pin on the MAX16001ETE+T is an active-low input that forces all OUT1–OUT4 and RESET outputs into a high (deasserted) state regardless of monitored voltage conditions - enabling safe margin testing without disrupting power. During production, pulling MARGIN low allows engineers to verify system behavior under intentional voltage derating while keeping the MAX16001ETE+T outputs disabled, preventing unintended resets or latch-ups.