Analog Devices Inc. ADM6339MARJZ-RL7

Overview

ADM6339MARJZ-RL7 from Analog Devices is a quad-voltage microprocessor supervisory circuit that monitors +5.0 V, +3.0 V, adjustable +1.23 V, and −5.0 V supply rails with ±10% threshold 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 used in server power sequencing and telecom system health monitoring.

For engineers reviewing the ADM6339MARJZ-RL7 datasheet, ADM6339MARJZ-RL7 pinout, ADM6339MARJZ-RL7 application, or ADM6339MARJZ-RL7 equivalent, key selection criteria include negative voltage monitoring capability (−5.0 V), factory-trimmed thresholds, SOT-23-6 package compatibility, reset timeout stability over temperature, and IN2-supplied operation with 1 V minimum validity.

Technical Context

The ADM6339MARJZ-RL7 integrates four independent voltage comparators with built-in hysteresis (0.3% V_TH) and uses IN2 as its sole power source (1.0 V to 5.5 V). Its −5.0 V monitoring channel employs internal pretrimmed reference with +10% tolerance, while the adjustable +1.23 V input supports external resistor dividers for custom thresholds.

Reset assertion occurs when any monitored voltage falls below its threshold (or rises above for negative inputs), holding RESET low until all inputs exceed thresholds and then sustaining the 200 ms timeout. The open-drain RESET output features a 10 μA internal pull-up to IN2 and remains valid down to IN1 = 1 V or IN2 = 1 V.

Key Specifications

Pinout & Package

ADM6339MARJZ-RL7 is housed in a 6-lead SOT-23 (RJ-6) package compliant with JEDEC MO-178-AB, measuring 2.90 mm × 1.60 mm × 1.15 mm, with gull-wing leads and pin 1 indicator.

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, ADM6339MARJZ-RL7 uniquely supports −5.0 V supervision alongside three positive rails in a single SOT-23-6 device, enabling compact, cost-effective health monitoring in bipolar supply systems without redesigning power architecture.

Availability

ADM6339MARJZ-RL7 is available at Aetrix Electronics and suitable for telecom infrastructure, server board design, and industrial PLC development requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for ADM6339MARJZ-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 semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and control.

The ADM6339 family was engineered for space-constrained, multi-rail systems needing reliable power-on reset and undervoltage detection - targeting telecom, computing, and industrial equipment where supply integrity directly impacts system uptime.

FAQ

What voltage rails does the ADM6339MARJZ-RL7 monitor?

The ADM6339MARJZ-RL7 monitors four specific rails: +5.0 V (IN1), +3.0 V (IN2, which also powers the device), an adjustable +1.23 V input (IN3, configurable via external resistor divider), and −5.0 V (IN4). This combination supports both standard positive logic supplies and legacy negative bias rails commonly found in telecom and industrial hardware. All thresholds are factory-trimmed with ±10% tolerance per the Ordering Guide.

How does the ADM6339MARJZ-RL7 handle negative voltage monitoring?

The ADM6339MARJZ-RL7 includes a dedicated −5.0 V input (IN4) with internal pretrimmed reference and +10% tolerance, enabling direct supervision of negative supply rails without external components. Unlike positive inputs, the −5.0 V comparator asserts RESET when the input voltage rises above the threshold - a behavior explicitly defined in the General Description and confirmed in Table 1's "VINx Increasing" column for −5.0 V. This polarity inversion ensures correct fault detection for negative supplies.

What is the role of IN2 in the ADM6339MARJZ-RL7?

IN2 serves two critical roles in the ADM6339MARJZ-RL7: it is both the monitored +3.0 V supply input and the sole power source for the entire IC. As stated in the Specifications table footnote, "The device is powered by Input IN2." Additionally, the internal 10 μA pull-up for the open-drain RESET output connects to IN2, meaning RESET logic-high level tracks IN2 voltage. The device remains fully functional as long as IN2 (or IN1) stays ≥1 V, enabling robust operation during brownout conditions.

Can the ADM6339MARJZ-RL7 replace a discrete supervisor solution?

Yes - the ADM6339MARJZ-RL7 replaces up to four discrete voltage supervisors or RC-based reset circuits in a single 6-lead SOT-23 package. Its integrated quad monitoring, factory-trimmed thresholds (including −5.0 V), 200 ms timeout, and 55 μA quiescent current eliminate external resistors, capacitors, and comparators. The datasheet's Typical Applications Circuit (Figure 13) confirms direct drop-in use with no additional passive components required for basic operation, reducing PCB area and BOM complexity.

Is the ADM6339MARJZ-RL7 RoHS compliant and lead-free?

Yes, the ADM6339MARJZ-RL7 is RoHS compliant and lead-free. The "Z" suffix in the part number (per the Ordering Guide footnote: "Z = RoHS Compliant Part") explicitly denotes compliance with EU Directive 2011/65/EU. The device uses matte tin lead finish and meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1), making it suitable for standard reflow assembly without special handling.