Analog Devices Inc./Maxim Integrated MAX16002ETC+

Overview

The MAX16002ETC+ from Maxim Integrated is a quad-voltage microprocessor supervisor IC in a 12-pin TQFN (4mm × 4mm) package, monitoring four independent supply rails (e.g., 3.3V, 2.5V, adjustable, and 1.8V) with fixed or 5%/10% tolerance thresholds, featuring a 140ms minimum reset timeout, open-drain outputs with internal 30µA pullups, and watchdog timer (1.6s typical timeout). It is used in multivoltage server power sequencing and storage controller supervision.

For engineers reviewing the MAX16002ETC+ datasheet, MAX16002ETC+ pinout, MAX16002ETC+ application, or MAX16002ETC+ equivalent, this page delivers verified circuit role, exact threshold configurations, watchdog behavior, reset timing dependencies on SRT capacitor, and validated alternative options for multivoltage ASIC and industrial embedded systems.

Technical Context

The MAX16002ETC+ implements a hierarchical reset architecture where RESET asserts low if any of its four monitored inputs (IN1–IN4) falls below its configured threshold or if MR is pulled low; the reset remains asserted for a timeout period (≥140ms, adjustable via SRT capacitor) after all voltages recover and MR is released. Its watchdog timer monitors WDI transitions and triggers RESET upon timeout (1.12–2.40s), with a 54s startup delay after reset assertion.

Each monitored input supports fixed thresholds (3.3V/2.5V/1.8V) or adjustable down to 0.4V, with hysteresis (0.5% of VTH) and ±100nA input leakage for adjustable modes. All open-drain outputs (OUT1–OUT4, RESET) include internal 30µA pullups and tolerate external drive up to 5.5V, eliminating need for discrete pullup resistors while supporting mixed-voltage interfacing.

Key Specifications

Pinout & Package

Package: 12-pin TQFN (4mm × 4mm), exposed pad (EP) internally connected to GND; requires PCB thermal pad connection for optimal thermal performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX16001ETC+, the MAX16002ETC+ offers identical functionality and pin compatibility but reflects updated factory programming nomenclature; versus TPS3808G33DBVR, it provides full quad monitoring, adjustable thresholds, watchdog, and margin control-critical for complex multivoltage ASICs requiring coordinated reset and test flexibility.

Availability

The MAX16002ETC+ is available at Aetrix Electronics and suitable for servers, storage equipment, and networking/telecommunication equipment requiring stable component supply, long-term industrial temperature support (-40°C to +125°C), and guaranteed multivoltage supervision with watchdog safety.

Supply support for MAX16002ETC+ 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, emphasizing reliability, integration, and thermal robustness.

The MAX16000–MAX16007 family was engineered specifically for multivoltage system supervision in space-constrained, high-reliability applications-delivering quad/hex/octal monitoring, integrated watchdog, and flexible reset timing in miniature TQFN packages.

FAQ

What voltage thresholds does the MAX16002ETC+ support for its four monitored inputs?

Per the datasheet, the MAX16002ETC+ (E-grade variant) supports fixed thresholds of 3.3V, 2.5V, and 1.8V on IN1–IN4, plus one adjustable input down to 0.4V. Threshold tolerance is selectable via the TOL pin: 5% (TOL = GND) or 10% (TOL = VCC). The MAX16002ETC+ does not support 5.0V or 1.2V fixed thresholds - those are exclusive to the MAX16006F variant.

Does the MAX16002ETC+ include a watchdog timer, and how is it configured?

Yes, the MAX16002ETC+ includes a watchdog timer with a typical timeout of 1.6s (range 1.12–2.40s). It is enabled by default and triggered by missing edges on the WDI pin. A 54s startup delay occurs after RESET assertion before the first WDI transition is required. Leaving WDI unconnected disables the watchdog. The MAX16002ETC+ uses the shared RESET output - not a dedicated WDO pin - for watchdog assertion.

What is the function of the MARGIN pin on the MAX16002ETC+, and how is it used in testing?

The MARGIN pin on the MAX16002ETC+ is an active-low manual deassert input. When pulled low, it forces all outputs (OUT1–OUT4 and RESET) into a high-impedance (deasserted) state regardless of input voltage conditions. This enables safe margin testing - e.g., intentionally lowering a supply rail to verify system behavior under out-of-spec conditions without triggering spurious resets.

Can the reset timeout period of the MAX16002ETC+ be adjusted, and what is the minimum value?

Yes, the reset timeout period of the MAX16002ETC+ is adjustable via an external capacitor on the SRT pin. With SRT tied to VCC, the timeout is fixed at a minimum of 140ms. Connecting a capacitor (CSRT) from SRT to GND scales the timeout per tRP = 2.06 × 10⁶ × CSRT seconds - e.g., 1500pF yields ~3.09ms. The MAX16002ETC+ does not support timeout values below 140ms in standard operation.

What package type and thermal considerations apply to the MAX16002ETC+?

The MAX16002ETC+ is supplied in a 12-pin TQFN package (4mm × 4mm) with exposed pad (EP). The EP is internally connected to GND and must be soldered to a PCB thermal pad for effective heat dissipation. The device is rated for continuous operation from -40°C to +125°C ambient, with junction temperature limited to +150°C. No heatsink is required under typical 65µA supply current conditions.