Analog Devices Inc./Maxim Integrated MAX16002BTC+T

Overview

The MAX16002BTC+T 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, 1.8V, and adjustable down to 0.4V) with ±5% or ±10% threshold tolerance selection, 140ms minimum reset timeout, and integrated watchdog timer (1.6s typical timeout). It serves as a system-level power integrity guardian in multivoltage server and storage platforms.

For engineers reviewing the MAX16002BTC+T datasheet, MAX16002BTC+T pinout, MAX16002BTC+T application, or MAX16002BTC+T equivalent, key selection criteria include quad-rail monitoring capability, open-drain outputs with internal 30µA pullups, manual reset and margin enable inputs, capacitor-adjustable reset timeout, and guaranteed operation down to VCC = 1V across –40°C to +125°C.

Technical Context

The MAX16002BTC+T implements a dual-mode supervision architecture: independent open-drain outputs for each monitored voltage (IN1–IN4), plus a shared active-low RESET output that asserts whenever any input falls below its threshold or MR is pulled low. Its watchdog timer starts counting after reset timeout completion and features a 54s startup delay before first timeout evaluation.

Threshold selection is controlled by the TOL pin (GND = 5%, VCC = 10%), and reset timeout is set either internally (140ms min, SRT = VCC) or externally via capacitor on SRT pin (t_RP = 2.06 MΩ × C_SRT). All outputs remain valid down to VCC = 1V, and input leakage is ≤16 µA for fixed thresholds.

Key Specifications

Pinout & Package

MAX16002BTC+T uses a 12-pin TQFN package (outline 21-0139, land pattern 90-0068) with 0.5mm pitch and thermally enhanced exposed pad connected to GND.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX16001BTC+T, the MAX16002BTC+T offers identical supervision architecture but targets different factory-configured threshold sets; versus TPS3307-33D, it adds a fourth monitor channel, adjustable thresholds, and watchdog-enabling more robust fault coverage in complex multivoltage systems.

Availability

MAX16002BTC+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 MAX16002BTC+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 multivoltage system supervision in high-reliability computing infrastructure-emphasizing rail independence, wide VCC range, and robust reset timing control.

FAQ

What voltage thresholds does the MAX16002BTC+T support for its four monitored inputs?

The MAX16002BTC+T supports factory-configurable fixed thresholds including 3.3V, 2.5V, and 1.8V on IN1–IN4, plus adjustable thresholds down to 0.4V. Threshold tolerance is selectable via the TOL pin: ±5% (TOL = GND) or ±10% (TOL = VCC). The exact configuration depends on the suffix variant (e.g., MAX16002A), and the MAX16002BTC+T corresponds to the standard A-version with 3.3V/2.5V/ADJ/1.8V assignment.

Does the MAX16002BTC+T require external pullup resistors on its open-drain outputs?

No, the MAX16002BTC+T does not require external pullup resistors. All open-drain outputs (OUT1–OUT4 and RESET) feature internal 30µA pullups to VCC, eliminating the need for discrete components while maintaining compatibility with external voltages up to 5.5V. This reduces BOM count and simplifies PCB layout for quad-rail supervision.

How is the reset timeout period configured on the MAX16002BTC+T?

The reset timeout on the MAX16002BTC+T is configured using the SRT pin: connecting SRT to VCC selects the internal minimum timeout of 140ms, while connecting an external capacitor from SRT to GND adjusts the timeout per t_RP = 2.06 MΩ × C_SRT. For example, a 1500pF capacitor yields ~3.09ms timeout. The SRT pin also has a defined threshold (1.235V) and hysteresis (100mV) for reliable timing control.

Can the MAX16002BTC+T operate reliably at low supply voltages?

Yes, the MAX16002BTC+T guarantees correct logic state operation down to VCC = 1.0V across the full –40°C to +125°C temperature range. This enables use in ultra-low-power or brownout scenarios where main system rails dip temporarily, ensuring continuous supervision integrity without latch-up or undefined output states.

What is the function of the MARGIN pin on the MAX16002BTC+T?

The MARGIN pin on the MAX16002BTC+T is an active-low input that forces all outputs (OUT1–OUT4 and RESET) into a high-impedance or deasserted state-regardless of monitored input conditions-during voltage margin testing. Pulling MARGIN low overrides all supervision logic, allowing safe verification of system behavior under out-of-spec supply conditions without triggering unintended resets.