Analog Devices Inc. ADM6339PARJZ-RL7

Overview

ADM6339PARJZ-RL7 from Analog Devices is a quad-voltage microprocessor supervisory circuit designed to monitor four independent supply rails-specifically configured for +5.0 V, +3.3 V, adjustable +1.23 V, and −5.0 V thresholds with ±5% tolerance. It delivers active-low open-drain RESET output with 200 ms typical timeout, operates from −40°C to +85°C, and draws only 55 μA quiescent current. It is deployed in server power sequencing and telecom baseband boards where multi-rail voltage integrity must trigger reliable system resets.

For engineers reviewing the ADM6339PARJZ-RL7 datasheet, ADM6339PARJZ-RL7 pinout, ADM6339PARJZ-RL7 application, or ADM6339PARJZ-RL7 equivalent, key selection criteria include verified −5.0 V monitoring capability, factory-trimmed ±5% threshold accuracy on all four inputs, guaranteed RESET validity down to IN1 or IN2 = 1 V, and SOT-23-6 package compatibility with high-density PCB layouts.

Technical Context

The ADM6339PARJZ-RL7 integrates four independent voltage comparators with internal hysteresis (0.3% of V_TH) and a shared 200 ms reset timeout timer. Its IN2 pin serves as both monitored supply and internal power source, enabling operation even when other rails are absent.

It supports mixed-signature monitoring: IN1 = +5.0 V (−5% tol), IN2 = +3.3 V (−5% tol), IN3 = adjustable +1.23 V (±0.8% accuracy), and IN4 = −5.0 V (−5% tol). The RESET output remains valid as long as IN1 ≥ 1 V or IN2 ≥ 1 V, and features an internal 10 μA pull-up to IN2-eliminating need for external pull-up in many logic-interface scenarios.

Key Specifications

Pinout & Package

ADM6339PARJZ-RL7 is housed in a JEDEC-compliant 6-lead SOT-23 (RJ-6) package, measuring 2.90 mm × 1.60 mm × 1.15 mm, suitable for automated placement and reflow soldering in high-volume production.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6339EUT+T and TPS3808G33DBVR, the ADM6339PARJZ-RL7 uniquely combines −5.0 V supervision, ±5% factory-trimmed accuracy across all four inputs, and integrated 200 ms timeout in a single SOT-23-6 device-enabling compact, high-reliability reset architecture where legacy analog or RS-232 interfaces coexist with modern digital rails.

Availability

ADM6339PARJZ-RL7 is available at Aetrix Electronics and suitable for telecom infrastructure, server baseboard management, and industrial PLC applications requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.

Supply support for ADM6339PARJZ-RL7 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

Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.

The ADM6339 family was engineered specifically for multi-rail microprocessor systems needing precise, low-power, and space-constrained voltage supervision-with emphasis on telecom, server, and data storage equipment where reliability under voltage transients is mission-critical.

FAQ

What voltage rails does the ADM6339PARJZ-RL7 monitor, and what are their exact thresholds?

The ADM6339PARJZ-RL7 monitors four specific rails: IN1 = +5.0 V (−5% threshold: 4.50 V to 4.75 V), IN2 = +3.3 V (−5% threshold: 2.85 V to 3.00 V), IN3 = adjustable +1.23 V (±0.8% accuracy), and IN4 = −5.0 V (−5% threshold: −4.75 V to −4.50 V). These values are factory-trimmed and documented in the Rev. A datasheet Table 1 under "Fixed Threshold Voltage (V_TH)" and "Adjustable Threshold Voltage (V_TH)" sections.

Does the ADM6339PARJZ-RL7 require external pull-up resistors on the RESET pin?

No, the ADM6339PARJZ-RL7 includes a 10 μA internal pull-up to the IN2 supply, making external pull-up resistors unnecessary in most applications interfacing with 3.3 V or 5 V logic. External pull-ups are only needed if interfacing with higher-voltage logic (e.g., 12 V) or when stronger drive capability is required beyond the internal 10 μA source.

Can the ADM6339PARJZ-RL7 operate if only IN1 or IN2 is powered?

Yes-the ADM6339PARJZ-RL7 guarantees RESET output validity as long as either IN1 ≥ 1 V or IN2 ≥ 1 V. Since IN2 also powers the internal circuitry, maintaining IN2 ≥ 1 V ensures full functionality even if other inputs are unpowered or floating (though unused inputs must be properly terminated per datasheet guidance).

What is the reset timeout period for the ADM6339PARJZ-RL7, and how stable is it over temperature?

The ADM6339PARJZ-RL7 has a typical reset timeout period of 200 ms, with specifications ranging from 140 ms to 280 ms across −40°C to +85°C. Figure 8 in the datasheet shows measured variation of ±6 ms over temperature, confirming tight consistency essential for predictable system boot timing.

How does the ADM6339PARJZ-RL7 handle negative voltage monitoring on IN4?

The ADM6339PARJZ-RL7 supports −5.0 V monitoring directly on IN4 using its internal −5.0 V comparator with −5% tolerance (−4.75 V to −4.50 V trip point). No external resistor divider is needed for nominal −5 V rails. For voltages more negative than −5.0 V, a low-impedance external divider (e.g., R1/R2 network) is required per Figure 14 in the datasheet to scale the input within the −5.0 V monitor range.