Analog Devices Inc./Maxim Integrated MAX16008TP+

Overview

MAX16008TP+ from Maxim Integrated is a quad window voltage detector IC designed for multivoltage system monitoring in servers, storage, and telecom equipment. It monitors four independent supply rails with user-adjustable undervoltage/overvoltage thresholds down to 0.4V, provides eight open-drain fault outputs (UVOUT1–4, OVOUT1–4), and operates across –40°C to +125°C with 1.5% threshold accuracy over temperature.

For engineers reviewing the MAX16008TP+ datasheet, MAX16008TP+ pinout, MAX16008TP+ application, or MAX16008TP+ equivalent, key selection considerations include its 20-pin TQFN package, absence of RESET/MR/SRT pins (distinguishing it from MAX16009), adjustable window thresholds via three external resistors per channel, and guaranteed correct logic state operation down to VCC = 1V.

Technical Context

The MAX16008TP+ implements four independent window comparators-each with separate UVIN_/OVIN_ inputs and corresponding UVOUT_/OVOUT_ open-drain outputs-enabling simultaneous detection of both undervoltage and overvoltage faults on four distinct power rails. Thresholds are set externally using resistor dividers, with internal reference accuracy of ±1.5% over full temperature range.

All outputs feature 30µA internal pullup current to VCC and support wire-OR configuration. A dedicated MARGIN input allows active-low output disable during system margin testing without interrupting voltage monitoring, and the device guarantees functional behavior down to VCC = 1V-critical for low-voltage ASIC and FPGA power sequencing.

Key Specifications

Pinout & Package

MAX16008TP+ is housed in a 4mm × 4mm, 20-pin thin QFN package with exposed pad (EP), rated for –40°C to +125°C operation. The EP is internally connected to GND and must be soldered to the PCB ground plane for thermal management.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad window voltage detector applications.

Compared with MAX16009TG+, MAX16008TP+ offers identical quad window detection capability but omits reset generation and manual reset control-making it optimal for pure fault-signaling architectures. Versus TPS3307-33DGNR, MAX16008TP+ delivers double the channel count, full threshold adjustability, and superior accuracy, justifying its use in high-reliability multivoltage systems.

Availability

MAX16008TP+ is available at Aetrix Electronics and suitable for server power sequencing, storage controller monitoring, and telecom line card protection requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX16008TP+ 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and computing markets.

The MAX16008/MAX16009 product line was designed specifically for high-accuracy, multirail voltage supervision in dense, thermally demanding systems-emphasizing low quiescent current, wide VCC range, and robust operation from –40°C to +125°C.

FAQ

What is the primary function of the MAX16008TP+ in a power management system?

The MAX16008TP+ serves as a quad window voltage detector that independently monitors four power supply rails for both undervoltage and overvoltage conditions. It asserts dedicated open-drain outputs (UVOUT1–4 and OVOUT1–4) when any monitored voltage falls outside its configured window. Unlike the MAX16009TG+, the MAX16008TP+ does not provide RESET output or manual reset functionality-making it ideal for pure fault-signaling applications where discrete fault flags are required per rail.

How are voltage thresholds set on the MAX16008TP+?

Voltage thresholds on the MAX16008TP+ are set externally using resistor dividers connected to each UVIN_/OVIN_ input pair. For each channel, three resistors (R1, R2, R3) define the upper and lower trip points relative to an internal 0.394V reference. The MAX16008TP+ supports thresholds as low as 0.388V (min), enabling monitoring of sub-1V rails. Input bias current is limited to ±100nA, allowing high-value resistors (up to 2MΩ) to minimize power consumption without compromising accuracy.

Does the MAX16008TP+ support operation at low supply voltages?

Yes, the MAX16008TP+ guarantees correct output logic states down to VCC = 1.0V, as specified in the Absolute Maximum Ratings and Electrical Characteristics tables. This capability ensures reliable fault signaling during brown-out conditions or low-power sleep modes. Its operating voltage range extends from 1.0V to 5.5V, and supply current remains stable at 45µA (typ) across this range-making the MAX16008TP+ suitable for systems with dynamically scaled or weakly regulated supplies.

What is the role of the MARGIN pin on the MAX16008TP+?

The MARGIN pin on the MAX16008TP+ is an active-low input that disables all UVOUT_/OVOUT_ outputs by forcing them into a high-impedance (deasserted) state, regardless of input voltage conditions. This allows safe system margin testing-such as intentional supply voltage deviation-without triggering false fault responses. The MAX16008TP+ continues monitoring internally while MARGIN is asserted, and outputs resume normal operation within 50µs after MARGIN is deasserted. The pin is internally pulled up to VCC and may be left unconnected if unused.

Can the outputs of the MAX16008TP+ be wired together?

Yes, all eight open-drain outputs (UVOUT1–4 and OVOUT1–4) of the MAX16008TP+ can be wire-OR'd together to form a single aggregated fault bus. Each output features a 30µA internal pullup to VCC, eliminating the need for external pullup resistors in many cases. When interfacing to logic with different supply voltages (e.g., 1.8V or 5V), an external pullup resistor (50kΩ–200kΩ) to the target logic rail may be used-the MAX16008TP+ includes internal circuitry to prevent reverse current flow from the external pullup into VCC.