Analog Devices Inc./Maxim Integrated MAX16004DTP+

Overview

MAX16004DTP+ from Maxim Integrated is a low-voltage, hex-voltage microprocessor supervisor IC in a 19-pin TQFN (4mm × 4mm) package. It monitors six independent supply rails (IN1–IN6) with fixed and adjustable thresholds (e.g., 3.3V, 2.5V, 1.8V, down to 0.4V), provides an active-low RESET output asserting on any undervoltage or manual reset, and integrates a 1.6s watchdog timer with 54s startup delay. It is used in multivoltage server power sequencing and ASIC supervision.

For engineers reviewing the MAX16004DTP+ datasheet, MAX16004DTP+ pinout, MAX16004DTP+ application, or MAX16004DTP+ equivalent, key selection criteria include its six-channel monitoring capability, capacitor-adjustable reset timeout (140ms min), internal 30µA pullups eliminating external resistors, -40°C to +125°C operation, and watchdog timer behavior with MR/SRT/MARGIN control inputs.

Technical Context

The MAX16004DTP+ implements independent voltage monitoring per channel with hysteresis (0.5% of threshold) and supports both fixed (5V/3.3V/2.5V/1.8V/1.5V/1.2V/0.9V) and adjustable (0.366V–0.400V) input thresholds selectable via the TOL pin (5% or 10% tolerance). Its RESET output asserts when any monitored voltage falls below its threshold or MR is pulled low, and remains asserted for the timeout period after recovery.

It features a watchdog timer that triggers RESET upon WDI timeout (1.12–2.40s), with a 54s startup delay after reset assertion; the timer clears on any WDI edge or MR assertion. All open-drain outputs (RESET, OUT1–OUT6) include internal 30µA pullups and tolerate external drive up to 5.5V.

Key Specifications

Pinout & Package

MAX16004DTP+ is housed in a 19-pin TQFN package (4mm × 4mm, 0.5mm pitch) with exposed pad (EP) internally connected to GND. The package code is T1944+4 (Outline 21-0139), and land pattern number is 90-0022.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX16003DTP+, the MAX16004DTP+ offers identical supervision architecture but with a distinct factory-set threshold combination optimized for mixed 3.3V/2.5V/1.8V/adjustable-rail systems; versus TPS3808G33DBVR, it delivers six-channel supervision, watchdog, and margining-enabling consolidation of up to six discrete supervisors into one IC.

Availability

MAX16004DTP+ is available at Aetrix Electronics and suitable for server power sequencing, storage equipment supervision, and networking equipment requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for MAX16004DTP+ 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 industrial, communications, computing, and automotive markets.

The MAX16000–MAX16007 family was engineered specifically for multivoltage system supervision in space-constrained, thermally demanding environments-emphasizing low quiescent current, wide temperature operation, and integration of monitoring, reset, and watchdog functions in minimal footprint.

FAQ

What is the reset timeout behavior of the MAX16004DTP+ when SRT is connected to VCC?

When SRT is connected to VCC, the MAX16004DTP+ uses its internal 140ms minimum reset timeout. This value is guaranteed across -40°C to +125°C and does not require an external capacitor. The actual timeout may range from 140ms to 280ms depending on process and temperature variation, as specified in the Electrical Characteristics table.

Does the MAX16004DTP+ support adjustable voltage thresholds on all six inputs?

Yes, the MAX16004DTP+ supports adjustable thresholds (0.366V–0.400V) on all six monitored inputs (IN1–IN6), in addition to fixed thresholds (e.g., 3.3V, 2.5V, 1.8V). Threshold selection is determined by the factory-programmed variant (MAX16004D) and confirmed in Table 1 of the datasheet; no external components are needed to enable adjustable mode.

How does the watchdog timer in the MAX16004DTP+ behave during power-up?

The MAX16004DTP+ watchdog timer enters a 54s startup delay after RESET is deasserted. During this period, no WDI transitions are required. After the delay expires, the timer begins counting, and failure to provide a WDI edge within 1.12–2.40s will assert RESET. Leaving WDI unconnected disables the watchdog entirely.

Can the MAX16004DTP+ outputs drive standard CMOS logic directly?

Yes, the MAX16004DTP+ open-drain outputs (RESET, OUT1–OUT6) can drive standard CMOS logic inputs. With internal 30µA pullups, they reach VOH ≥ 0.8×VCC when deasserted. For loads requiring faster rise times or higher sink current, external pullups may be added-but are not required for basic CMOS interfacing.

What is the function of the MARGIN pin on the MAX16004DTP+?

The MARGIN pin on the MAX16004DTP+ is an active-low input that forces all outputs (OUT1–OUT6 and RESET) into a high-impedance (deasserted) state when pulled low. This enables voltage margin testing by temporarily disabling supervision while test equipment sweeps supply voltages-without affecting system power states.