Analog Devices Inc./Maxim Integrated MAX6884ETP+

Overview

The MAX6884ETP+ from Maxim Integrated is an EEPROM-configurable hex power-supply supervisory IC that monitors six voltage-detector inputs (IN1–IN6), one auxiliary input (AUXIN), and one watchdog input (WDI), with three programmable outputs (RESET, UV/OV, WDO) for multi-rail server and telecom power sequencing. It features ±1% threshold accuracy, internal 10-bit ADC, SMBus/I²C interface, and operates from -40°C to +85°C in a 20-pin thin QFN package.

For engineers reviewing the MAX6884ETP+ datasheet, MAX6884ETP+ pinout, MAX6884ETP+ application, or MAX6884ETP+ equivalent, this page delivers verified functional scope, confirmed ADC capability, validated timing delay ranges (25µs–1600ms), exact pin roles per Maxim's official pin description, and two technically documented alternative parts for multi-voltage monitoring systems requiring EEPROM configuration and fault logging.

Technical Context

The MAX6884ETP+ implements a digital-configurable supervision architecture with independent primary undervoltage and secondary UV/OV thresholds per IN1–IN6 input, programmable via EEPROM using SMBus/I²C. Its internal 10-bit ADC samples all six detector inputs, AUXIN, and VCC every 200ms with ±1% total unadjusted error referenced to a 1.25V internal or external reference.

Three open-drain/weak-pullup outputs-RESET, UV/OV, and WDO-are independently configurable for assertion source (e.g., RESET dependent on WDO or MR), active-low logic, and deassertion delay (25µs–1600ms). A dedicated fault register logs root-cause events including undervoltage, overvoltage, manual reset, and watchdog timeout.

Key Specifications

Pinout & Package

MAX6884ETP+ uses a 5mm × 5mm × 0.8mm 20-pin thin QFN package (T2055-5) with exposed paddle (EP) internally connected to GND.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar power-supply supervisory applications.

Compared with MAX6885ETP+, the MAX6884ETP+ adds ADC-based telemetry and auxiliary input monitoring; compared with TPS386000RGPT, it offers EEPROM configurability, I²C interface, and integrated fault logging-making it suitable for adaptive, serviceable, and diagnostic-capable power architectures.

Availability

MAX6884ETP+ is available at Aetrix Electronics and suitable for telecommunications central-office systems, multi-rail server power sequencing, and industrial edge compute modules requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for MAX6884ETP+ 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 and mixed-signal ICs for demanding industrial, communications, and computing applications.

The MAX6884ETP+ belongs to Maxim's EEPROM-programmable supervisory product line, engineered for complex, multi-voltage systems requiring field-reconfigurable thresholds, hardware watchdogs, and integrated telemetry without external components.

FAQ

What is the function of the AUXIN pin on the MAX6884ETP+?

The AUXIN pin on the MAX6884ETP+ is a high-impedance auxiliary analog input that feeds the internal 10-bit ADC. It accepts voltages from 0V to 1.25V and is converted alongside IN1–IN6 and VCC every 200ms. Unlike detector inputs, AUXIN does not influence any supervisory output (RESET, UV/OV, or WDO); its sole purpose is telemetry. The MAX6884ETP+ datasheet confirms AUXIN is absent on the MAX6885ETP+ variant.

Does the MAX6884ETP+ support both internal and external voltage references for the ADC?

Yes, the MAX6884ETP+ supports both internal and external references for its 10-bit ADC. By default, it uses an internal 1.25V reference (±1% accuracy). To improve precision, an external reference between 1.225V and 1.275V can be applied to the REFIN pin; the device automatically switches to external mode when REFIN is driven. This dual-reference capability is exclusive to the MAX6884ETP+ and not available on the MAX6885ETP+.

How does the MAX6884ETP+ derive its power supply?

The MAX6884ETP+ derives power either from the highest of IN1–IN4 inputs (2.7V to 5.8V) or from an externally supplied VCC (2.7V to 5.5V), selected via EEPROM configuration bit 96h[5]. VCC powers analog circuitry and must be bypassed with a 1µF ceramic capacitor. DBP (2.55V nominal) is generated internally to power digital logic and EEPROM. Neither VCC nor DBP may supply external loads-both require local bypassing and are strictly for internal use.

Can the MAX6884ETP+ watchdog timer be disabled after power-up?

Yes, the MAX6884ETP+ watchdog timer can be disabled after power-up via SMBus/I²C command by writing to the appropriate configuration register. The watchdog has separate enable/disable bits for initial and normal modes, allowing flexible operation-for example, enabling watchdog supervision only after firmware initialization completes. This functionality is retained across power cycles if stored in nonvolatile EEPROM, and is confirmed in the MAX6884ETP+ functional description and register map.

What is the maximum timing delay available for the RESET output on the MAX6884ETP+?

The maximum timing delay for the RESET output on the MAX6884ETP+ is 1600ms (1.6 seconds). This deassertion delay is programmable in eight discrete steps: 25µs, 1.5625ms, 6.25ms, 25ms, 50ms, 200ms, 400ms, and 1600ms. The delay begins after the triggering condition (e.g., voltage recovery or MR release) is cleared and is independent of UVLO behavior. All three outputs-RESET, UV/OV, and WDO-support this same delay range.