Analog Devices Inc./Maxim Integrated MAX16004CTP+

Overview

MAX16004CTP+ 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 thresholds for 3.3V, 2.5V, 1.8V, and adjustable thresholds 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 MAX16004CTP+ datasheet, MAX16004CTP+ pinout, MAX16004CTP+ application, or MAX16004CTP+ equivalent, key selection criteria include its six-rail monitoring capability, capacitor-adjustable 140ms–3.92ms reset timeout, internal 30µA pullups eliminating external resistors, -40°C to +125°C operation, and watchdog timer with MR/SRT/MARGIN/TOL control inputs.

Technical Context

The MAX16004CTP+ implements independent voltage monitoring per input channel with hysteresis (0.5% of threshold), open-drain outputs with internal 30µA pullups, and a shared active-low RESET output that asserts when any monitored rail falls below its threshold or MR is pulled low. Its watchdog timer clears on WDI edge transitions and enters a 54s startup window before first timeout.

Reset assertion is synchronized to SRT pin configuration: internally fixed at ≥140ms when SRT = VCC, or externally programmable via capacitor (e.g., 1500pF yields 3.09ms typ). Threshold tolerance is selectable (5% or 10%) via TOL pin, and MARGIN enables full output deassertion during margin testing without affecting voltage monitoring.

Key Specifications

Pinout & Package

MAX16004CTP+ is housed in a 19-pin, 4mm × 4mm, 0.5mm pitch TQFN package (package code T1944+4, outline 21-0139) with exposed pad (EP) connected internally to GND for thermal management.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX16003CTP+, the MAX16004CTP+ offers identical supervision functionality but targets distinct threshold configurations; versus TPS3808G33DBVR, it delivers six-rail coverage, watchdog, wide temperature support, and programmable timing-making it essential for high-reliability multivoltage systems.

Availability

MAX16004CTP+ is available at Aetrix Electronics and suitable for storage equipment, servers, and networking/telecommunication equipment requiring stable component supply across industrial temperature ranges and long product lifecycles.

Supply support for MAX16004CTP+ 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 servers, storage, and telecom infrastructure-emphasizing accuracy, configurability, and robustness across -40°C to +125°C.

FAQ

What is the reset timeout behavior of the MAX16004CTP+?

The MAX16004CTP+ provides a minimum reset timeout of 140ms when the SRT pin is tied to VCC. For longer delays, connect an external capacitor between SRT and GND; for example, a 1500pF capacitor yields a typical timeout of 3.09ms. The timeout remains asserted until all six monitored voltages exceed their thresholds and the manual reset (MR) input is deasserted. This ensures reliable power-up sequencing in complex systems.

Does the MAX16004CTP+ support adjustable voltage thresholds?

Yes, the MAX16004CTP+ supports adjustable thresholds on all six inputs (IN1–IN6), enabling monitoring of voltages as low as 0.4V. When configured for adjustable mode, the threshold accuracy is ±0.6%, and the input bias current is ±100nA-ideal for precision resistor-divider networks. Fixed thresholds (e.g., 3.3V, 2.5V, 1.8V) are also available depending on the factory configuration suffix (e.g., 'C' in MAX16004C).

How does the watchdog timer function in the MAX16004CTP+?

The MAX16004CTP+ watchdog timer has a typical timeout period of 1.6s and includes a 54s startup delay after reset to accommodate system boot. It clears on any rising or falling edge at the WDI pin and asserts the RESET output if no transition occurs within the timeout window. Leaving WDI unconnected disables the watchdog. The timer's 100nA input leakage ensures compatibility with low-drive GPIOs.

What is the purpose of the MARGIN pin on the MAX16004CTP+?

The MARGIN pin on the MAX16004CTP+ is an active-low input that deasserts all open-drain outputs (OUT1–OUT6 and RESET) regardless of monitored voltage states. This allows safe voltage margin testing-e.g., lowering rail voltages during validation-without triggering false resets. Outputs return to normal operation immediately upon MARGIN release, preserving real-time supervision integrity throughout test cycles.

Can the MAX16004CTP+ operate reliably at low VCC levels?

Yes, the MAX16004CTP+ guarantees correct logic state operation down to VCC = 1.0V, making it suitable for brownout scenarios and low-voltage system designs. Its internal circuitry remains functional and outputs retain defined states even as supply drops below typical 1.8V or 2.5V logic thresholds-critical for fail-safe behavior in industrial and automotive-adjacent applications.