Analog Devices Inc./Maxim Integrated MAX16003CTE+

Overview

MAX16003CTE+ from Maxim Integrated is a low-voltage, hex-voltage microprocessor supervisor IC designed for multivoltage system monitoring in industrial and telecom infrastructure. It monitors six independent supply rails (e.g., 3.3V, 2.5V, 1.8V, and adjustable down to 0.4V), provides an active-low RESET output asserting on any fault or manual reset, features a 140ms minimum internal reset timeout, and operates across –40°C to +125°C.

For engineers reviewing the MAX16003CTE+ datasheet, MAX16003CTE+ pinout, MAX16003CTE+ application, or MAX16003CTE+ equivalent, this device supports precise voltage margining, watchdog timer supervision (1.6s typical timeout), tolerance-selectable thresholds (5% or 10%), and open-drain outputs with internal 30µA pullups-reducing external component count in high-reliability power sequencing designs.

Technical Context

The MAX16003CTE+ implements independent voltage monitoring per input channel with hysteresis (0.5% of threshold) and propagation delay ≤20µs. Its RESET output asserts when any monitored voltage falls below its threshold or MR is pulled low, and remains asserted for the full reset timeout after all voltages recover and MR is released.

It integrates a watchdog timer with 1.6s typical timeout and 54s startup delay (post-reset), disabled by leaving WDI floating. The SRT pin enables capacitor-adjustable reset timeout (t_RP = 2.06 MΩ × C_SRT), while TOL selects 5% or 10% threshold tolerance and MARGIN forces output deassertion during margin testing.

Key Specifications

Pinout & Package

MAX16003CTE+ is housed in a 16-pin TQFN package (4mm × 4mm, 0.5mm pitch) with exposed pad (EP) connected internally to GND for thermal management.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX16004CTE+, MAX16003CTE+ offers guaranteed 2.5V monitoring on IN2 - critical for legacy I/O standards - while both share identical timing, temperature range, and watchdog behavior; TPS3808G33DBVR lacks scalability for complex systems requiring coordinated multi-rail reset and margining.

Availability

MAX16003CTE+ is available at Aetrix Electronics and suitable for storage equipment, servers, and networking/telecom equipment requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for MAX16003CTE+ 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 and mixed-signal ICs for industrial, automotive, communications, and computing markets.

The MAX16000–MAX16007 family delivers multivoltage µP supervision with flexible threshold configuration, watchdog safety features, and extended-temperature operation - targeting high-availability infrastructure where power integrity directly impacts system uptime.

FAQ

What is the operating temperature range for the MAX16003CTE+?

The MAX16003CTE+ is fully specified from –40°C to +125°C, with junction temperature rated to +150°C. This extended range supports deployment in harsh environments such as telecom base stations, industrial PLCs, and automotive under-hood modules where ambient temperatures exceed standard commercial limits. The device maintains threshold accuracy and reset timing stability across this full range.

Does the MAX16003CTE+ support adjustable voltage thresholds?

Yes, the MAX16003CTE+ supports adjustable thresholds on up to four inputs (IN3, IN4, IN5, IN6 depending on variant), with minimum detectable voltage of 0.4V. When configured for adjustable mode, the threshold is set by an external resistor divider, and the device guarantees ±1.5% accuracy over temperature. Fixed thresholds (e.g., 3.3V, 2.5V, 1.8V) are factory-programmed for other inputs per the 'C' variant designation.

How is the reset timeout period configured on the MAX16003CTE+?

The MAX16003CTE+ offers dual reset timeout configuration: a default 140ms minimum achieved by connecting SRT to V_CC, or a user-adjustable period using an external capacitor from SRT to GND. The timeout is calculated as t_RP = 2.06 MΩ × C_SRT; for example, a 100nF capacitor yields ~206ms. This flexibility accommodates slow-ramping power supplies without requiring firmware intervention.

Can the MAX16003CTE+ be used without an external watchdog timer circuit?

Yes - the MAX16003CTE+ integrates a fully functional watchdog timer with 1.6s typical timeout and 54s startup delay. To disable it, simply leave the WDI pin unconnected (floating). The internal open-state detector draws only 100nA, eliminating external components. When enabled, WDI transitions clear the timer; timeout asserts RESET, providing autonomous recovery for locked firmware.

What package type and footprint does the MAX16003CTE+ use?

The MAX16003CTE+ uses a 16-pin TQFN package (4mm × 4mm, 0.5mm pitch) with exposed pad (EP), designated by package code T1644+4 and outline number 21-0139. The EP is internally connected to GND and must be soldered to the PCB ground plane for thermal performance and EMI control. Land pattern number 90-0070 defines the recommended copper layout.