Analog Devices Inc./Maxim Integrated MAX16003ETE+

Overview

The MAX16003ETE+ from Maxim Integrated is a low-voltage, hex-voltage microprocessor supervisor IC in a 16-pin TQFN (4mm × 4mm) package, monitoring six independent supply rails (IN1–IN6) with fixed and adjustable thresholds down to 0.4V, featuring open-drain outputs with internal 30µA pullups, a capacitor-adjustable reset timeout (min 140ms), and integrated watchdog timer (1.6s typ). It is used in multivoltage ASIC power sequencing and fault detection for servers and storage equipment.

For engineers reviewing the MAX16003ETE+ datasheet, MAX16003ETE+ pinout, MAX16003ETE+ application, or MAX16003ETE+ equivalent, key selection criteria include its six monitored inputs, independent OUT1–OUT6 outputs, RESET assertion on any undervoltage or MR assertion, watchdog enable/disable via WDI, and operation across –40°C to +125°C.

Technical Context

The MAX16003ETE+ implements a deterministic voltage-monitoring architecture with per-input hysteresis (0.5% of threshold), independent open-drain outputs for each of six monitored rails, and a shared active-low RESET output that asserts when any input falls below its threshold or MR is pulled low. Thresholds are selected via TOL pin (5% or 10% tolerance) and support fixed values (e.g., 3.3V, 2.5V, 1.8V) or adjustable down to 0.4V.

Its watchdog timer monitors WDI transitions with a typical 1.6s timeout and 54s startup delay after reset; it clears on any edge and disables when WDI is left floating. The SRT pin accepts an external capacitor to scale reset timeout linearly (t_RP = 2.06 MΩ × C_SRT), while MARGIN enables simultaneous deassertion of all outputs during margin testing.

Key Specifications

Pinout & Package

Package: 16-pin TQFN (4mm × 4mm), exposed pad (EP) internally connected to GND; requires PCB thermal pad connection for thermal performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX16004ETE+, the MAX16003ETE+ offers identical supervision architecture but targets different threshold configurations; versus TPS3808G33DBVR, it delivers six-fold monitoring density, integrated watchdog, and production test features - making it irreplaceable in multivoltage ASIC platforms.

Availability

MAX16003ETE+ is available at Aetrix Electronics and suitable for server power sequencing, storage equipment monitoring, and networking equipment requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for MAX16003ETE+ 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 industrial, computing, communications, and automotive markets.

The MAX16000–MAX16007 family was engineered specifically for multivoltage system supervision in space-constrained, high-reliability applications such as servers, storage, and telecom infrastructure - emphasizing integration, temperature robustness, and production test flexibility.

FAQ

What is the function of the MARGIN pin on the MAX16003ETE+?

The MARGIN pin on the MAX16003ETE+ is an active-low manual deassert input. When pulled low, it forces all six output pins (OUT1–OUT6) and the RESET output into a high-impedance (deasserted) state, regardless of the voltage levels at IN1–IN6. This feature enables safe margin testing during production, allowing engineers to verify system behavior under controlled voltage deviations without triggering false resets.

Does the MAX16003ETE+ support adjustable reset timeout, and how is it configured?

Yes, the MAX16003ETE+ supports adjustable reset timeout via the SRT pin. Connecting an external capacitor between SRT and GND sets the timeout period using the formula t_RP = 2.06 MΩ × C_SRT. For example, a 1000pF capacitor yields ~2.06ms, while 1500pF gives ~3.09ms. Leaving SRT tied to VCC selects the internal minimum timeout of 140ms. This eliminates external timing resistors and simplifies layout.

How many voltage rails does the MAX16003ETE+ monitor, and what threshold options are available?

The MAX16003ETE+ monitors six independent voltage rails (IN1–IN6). Thresholds include fixed options (e.g., 3.3V, 2.5V, 1.8V, 1.5V, 1.2V, 0.9V) and adjustable down to 0.4V. The TOL pin selects ±5% or ±10% tolerance, and specific threshold combinations are factory-configured per variant (e.g., MAX16003A = 3.3V/2.5V/ADJ/1.8V/ADJ/ADJ).

Can the MAX16003ETE+ watchdog timer be disabled, and how?

Yes, the watchdog timer in the MAX16003ETE+ is disabled by leaving the WDI pin unconnected (floating). The device uses a high-impedance open-state detector (~100nA bias current), so no pullup or pulldown is required. When WDI is floating, the timer remains inactive and does not assert RESET - preserving system operation without requiring software intervention.

What is the operating temperature range and supply voltage range for the MAX16003ETE+?

The MAX16003ETE+ operates from –40°C to +125°C and supports a supply voltage range of VCC = 1.0V to 5.5V. Its logic outputs remain valid down to VCC = 1V, and all specifications - including threshold accuracy, reset timeout, and watchdog timing - are guaranteed across the full temperature range, making it suitable for harsh industrial and extended-temperature embedded environments.