Analog Devices Inc./Maxim Integrated MAX16002ETC+T

Overview

The MAX16002ETC+T from Maxim Integrated is a low-voltage quad-voltage microprocessor supervisor IC in a 12-pin TQFN (4mm × 4mm) package, monitoring four independent supply rails (e.g., 3.3V, 2.5V, 1.8V, adjustable down to 0.4V) with fixed or 5%/10% threshold tolerance selection, 140ms minimum reset timeout, and integrated watchdog timer (1.6s typical timeout). It serves multivoltage ASICs and server power sequencing.

For engineers reviewing the MAX16002ETC+T datasheet, MAX16002ETC+T pinout, MAX16002ETC+T application, or MAX16002ETC+T equivalent, key selection criteria include quad-rail monitoring capability, capacitor-adjustable reset timeout, watchdog timer enable/disable via WDI pin, internal 30µA pullups eliminating external resistors, and operation across –40°C to +125°C.

Technical Context

The MAX16002ETC+T implements a dual-function supervisory architecture: independent open-drain voltage monitors for IN1–IN4 with hysteresis (0.5% of threshold), and a shared active-low RESET output asserting whenever any monitored voltage falls below its threshold or MR is pulled low. The reset timeout is either fixed at ≥140ms (SRT = VCC) or externally programmable via capacitor on SRT pin.

It integrates a watchdog timer with 1.6s typical timeout and 54s startup delay after reset, disabled by leaving WDI floating; the timer clears on rising/falling WDI edges. All digital inputs (MR, MARGIN, TOL, WDI, SRT) accept standard CMOS logic levels referenced to VCC, and outputs guarantee correct logic state down to VCC = 1V.

Key Specifications

Pinout & Package

MAX16002ETC+T uses a 12-pin TQFN package (outline 21-0139, land pattern 90-0068) with 0.5mm pitch and thermally enhanced exposed pad connected internally to GND.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX16001ETC+T and TPS3307-33DGNR, the MAX16002ETC+T uniquely delivers quad-rail monitoring with adjustable thresholds, integrated watchdog, and margin test support in a single 12-pin TQFN-enabling compact, robust supervision for next-gen multivoltage systems without design compromises.

Availability

MAX16002ETC+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 product lifecycles.

Supply support for MAX16002ETC+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 complex multivoltage systems in servers, storage, and networking gear-delivering scalable rail counts (4/6/8), flexible threshold options, and integrated supervision features in miniature packages.

FAQ

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

The MAX16002ETC+T supports fixed thresholds of 3.3V, 2.5V, and 1.8V on designated inputs (IN1–IN4), plus an adjustable threshold down to 0.4V. Threshold tolerance is selectable via the TOL pin: 5% (TOL = GND) or 10% (TOL = VCC). Specific configurations (e.g., MAX16002A) assign fixed values per pin; the MAX16002ETC+T variant corresponds to the 'A' configuration per datasheet Table 1.

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

Yes, the MAX16002ETC+T includes a watchdog timer with a typical timeout of 1.6s (range 1.12–2.40s) and a 54s startup delay after reset. It is enabled by connecting the WDI pin to a toggling signal; leaving WDI unconnected disables the timer. The timer clears on any rising or falling edge at WDI and asserts RESET if timeout expires.

How is the reset timeout period set on the MAX16002ETC+T?

The reset timeout on the MAX16002ETC+T is set via the SRT pin: connecting SRT to VCC yields a minimum 140ms timeout, while connecting an external capacitor from SRT to GND allows adjustment using t_RP = 2.06 × 10⁶ Ω × C_SRT. For example, a 1500pF capacitor yields ~3.09ms. The internal current source (600nA typ) and threshold (1.235V) define the timing slope.

What is the purpose of the MARGIN pin on the MAX16002ETC+T?

The MARGIN pin on the MAX16002ETC+T is an active-low input that forces all monitored outputs (including RESET) into a high-impedance or deasserted state, regardless of input voltage conditions. This enables safe voltage margin testing during production or field diagnostics without triggering false resets or system faults.

Can the MAX16002ETC+T operate reliably at VCC = 1.2V, and what are the output voltage specifications at that level?

Yes, the MAX16002ETC+T is fully specified down to VCC = 1.0V and guarantees correct logic state at 1.2V. At VCC = 1.2V, RESET and OUT_ outputs drive low to ≤0.30V with 50µA sink current, and drive high to ≥0.8 × VCC (≥0.96V) with 6µA source current - ensuring compatibility with 1.2V logic families.