Analog Devices Inc./Maxim Integrated MAX16001ATE+T

Overview

MAX16001ATE+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), featuring an active-low RESET output asserting on any undervoltage or manual reset, with 140ms minimum timeout and watchdog timer (1.6s typical). It serves multivoltage ASICs and server power sequencing.

For engineers reviewing the MAX16001ATE+T datasheet, MAX16001ATE+T pinout, MAX16001ATE+T application, or MAX16001ATE+T equivalent, key selection criteria include quad-rail threshold flexibility (5%/10% tolerance select), integrated 30µA internal pullups eliminating external resistors, guaranteed operation down to VCC = 1V, AEC-Q100 qualification (for automotive-grade variants), and watchdog startup delay (54s).

Technical Context

The MAX16001ATE+T implements independent voltage monitoring per input with hysteresis (0.5% of threshold), open-drain outputs with internal 30µA pullups, and a shared active-low RESET output that latches until all monitored voltages recover and the reset timeout expires. Its watchdog timer clears on WDI edge transitions and enters a 54s startup window before first timeout enforcement.

Threshold selection is controlled by the TOL pin (GND = 5%, VCC = 10%), while SRT sets reset timeout via external capacitor (or fixed 140ms when tied to VCC); MARGIN enables simultaneous deassertion of all outputs during margin testing. All inputs tolerate voltages up to VCC + 0.3V, and outputs drive up to 5.5V externally.

Key Specifications

Pinout & Package

MAX16001ATE+T uses a 16-pin TQFN package (4mm × 4mm, outline 21-0139, land pattern 90-0070) with exposed pad internally connected to GND for thermal dissipation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX16001DTE+T, the MAX16001ATE+T offers superior thermal performance via TQFN's exposed pad and AEC-Q100 compliance for automotive use; versus TPS3808G33DBVR, it provides true quad-rail supervision, adjustable thresholds, and integrated watchdog - essential for multivoltage ASICs and server platforms.

Availability

MAX16001ATE+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 MAX16001ATE+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, automotive, and computing applications.

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

FAQ

What is the function of the MARGIN pin on the MAX16001ATE+T?

The MARGIN pin on the MAX16001ATE+T is an active-low manual deassert input. When pulled low, it forces all four OUT_ outputs and the RESET output into a high (deasserted) state regardless of monitored voltage levels - enabling safe margin testing of power supplies without triggering system reset. This feature is critical for validating voltage tolerances during production test or field calibration of multivoltage ASICs.

Does the MAX16001ATE+T support adjustable voltage thresholds below 1.8V?

Yes, the MAX16001ATE+T supports adjustable thresholds down to 0.4V on any monitored input (IN1–IN4) using the adjustable threshold mode (selected via TOL pin configuration). The device achieves this with a precision internal reference and hysteresis of 0.5% of the threshold voltage, making it suitable for supervising modern low-voltage cores such as 1.2V, 0.9V, or custom DC-DC outputs in the MAX16001ATE+T's specified operating range.

How is the reset timeout period configured on the MAX16001ATE+T?

The reset timeout period on the MAX16001ATE+T is configured via the SRT pin: connecting SRT to VCC selects the internal 140ms minimum timeout, while connecting an external capacitor from SRT to GND adjusts the timeout per the formula tRP = 2.06 × 10⁶ Ω × CSRT (F). For example, a 100nF capacitor yields ~206ms timeout. This flexibility allows precise alignment with processor power-up requirements in complex systems using the MAX16001ATE+T.

Is the MAX16001ATE+T pin-compatible with other devices in the MAX16000–MAX16007 family?

No - the MAX16001ATE+T is not pin-compatible with most other members of the MAX16000–MAX16007 family. While it shares the 16-pin TQFN package with MAX16001DTE+T, its pinout differs from hex/octal variants (e.g., MAX16003/MAX16004) and even from MAX16000/MAX16002 due to distinct IN_/OUT_ assignments and peripheral signal placement. Always verify against the MAX16001ATE+T specific pin diagram before layout reuse.

What is the watchdog timer behavior during power-up of the MAX16001ATE+T?

Upon power-up, the MAX16001ATE+T watchdog timer enters a 54-second startup delay before enforcing timeout detection - allowing time for firmware initialization and stable clock acquisition. During this window, WDI transitions do not clear the timer, but once started, the timer resets on every rising or falling edge of WDI. If no edge occurs within 1.6s (typ), RESET asserts. This behavior prevents spurious resets during boot and ensures reliable runtime supervision in systems using the MAX16001ATE+T.