Analog Devices Inc. ADM6339JARJZ-RL7

Overview

ADM6339JARJZ-RL7 from Analog Devices is a quad-voltage microprocessor supervisory circuit in a 6-lead SOT-23 package, monitoring +5.0 V (±5%), +3.3 V (±5%), +2.5 V (±5%), and +1.8 V (±5%) supply rails with 200 ms reset timeout, open-drain active-low RESET output, and guaranteed operation down to IN1 or IN2 = 1 V. It delivers accurate voltage supervision for embedded microprocessor systems requiring stable power sequencing and fault detection.

For engineers reviewing the ADM6339JARJZ-RL7 datasheet, ADM6339JARJZ-RL7 pinout, ADM6339JARJZ-RL7 application, or ADM6339JARJZ-RL7 equivalent, key selection criteria include factory-trimmed ±5% threshold accuracy across four fixed positive rails, low 55 μA quiescent current, glitch-immune comparator architecture, and compatibility with industrial temperature range (−40°C to +85°C) designs.

Technical Context

The ADM6339JARJZ-RL7 integrates four independent voltage comparators with pretrimmed thresholds for +5.0 V, +3.3 V, +2.5 V, and +1.8 V supplies at ±5% tolerance, each featuring 0.3% VTH hysteresis for noise immunity. Its internal reference and resistor dividers eliminate external component dependencies for these fixed thresholds.

IN2 serves as both monitored supply and device power source; RESET is open-drain with 10 μA internal pull-up to IN2 and remains valid as long as IN1 ≥ 1 V or IN2 ≥ 1 V. The device asserts RESET low when any input falls below its threshold (or rises above for negative options - not applicable here), holding low for 140–280 ms after all inputs recover.

Key Specifications

Pinout & Package

Package: 6-lead SOT-23 (RJ-6), JEDEC MO-178-AB compliant, footprint-compatible with standard SOT-23 layouts.

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 ADM6339JARJZ-RL7 uniquely integrates all four required thresholds (+5.0 V, +3.3 V, +2.5 V, +1.8 V) with ±5% accuracy in one SOT-23 package, delivering true quad-rail supervision without external components or layout changes.

Availability

ADM6339JARJZ-RL7 is available at Aetrix Electronics and suitable for telecommunications infrastructure, industrial microcontroller systems, and data storage controller applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for ADM6339JARJZ-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 precision instrumentation, industrial automation, communications, and automotive markets since 1965.

The ADM6339 product line delivers compact, low-power quad-supervisory circuits optimized for multi-rail microprocessor systems needing accurate, glitch-immune voltage monitoring without external calibration components.

FAQ

What voltage thresholds does the ADM6339JARJZ-RL7 monitor?

The ADM6339JARJZ-RL7 monitors +5.0 V, +3.3 V, +2.5 V, and +1.8 V supply rails with factory-trimmed ±5% threshold accuracy. Each input corresponds to one fixed threshold: IN1 = +5.0 V, IN2 = +3.3 V, IN3 = +2.5 V, IN4 = +1.8 V. No adjustable or negative thresholds are enabled in this variant, as confirmed by the Ordering Guide model suffix "J" and branding code "MBR".

Does the ADM6339JARJZ-RL7 require external components for basic operation?

No, the ADM6339JARJZ-RL7 operates without external resistors or capacitors for its four fixed thresholds. A 0.1 μF bypass capacitor on IN2 to GND is recommended for enhanced noise immunity, but it is not mandatory for functionality. The internal 10 μA pull-up on RESET eliminates the need for an external pull-up when interfacing with logic referenced to IN2.

What is the minimum operating voltage for the ADM6339JARJZ-RL7 to assert valid RESET?

The ADM6339JARJZ-RL7 guarantees RESET output validity as long as either IN1 ≥ 1 V or IN2 ≥ 1 V. This allows continued supervision during brownout conditions where one rail collapses before others, ensuring deterministic reset behavior even when supply voltages dip near cutoff - a key requirement for industrial and telecom systems.

How does the ADM6339JARJZ-RL7 handle simultaneous voltage faults across multiple rails?

The ADM6339JARJZ-RL7 asserts RESET low immediately upon detection of the first undervoltage condition on any monitored input. RESET remains low until all four inputs exceed their respective thresholds, then holds low for the full 140–280 ms timeout period before releasing. This ensures complete system stabilization before processor restart, preventing race conditions during recovery.

Is the ADM6339JARJZ-RL7 RoHS compliant and what package does it use?

Yes, the ADM6339JARJZ-RL7 is RoHS compliant (indicated by the "Z" suffix) and packaged in a 6-lead SOT-23 (RJ-6) outline per JEDEC MO-178-AB. Its dimensions are 2.90 mm × 1.60 mm × 1.15 mm, with gull-wing leads and pin 1 marked for orientation - fully compatible with standard SOT-23 pick-and-place and reflow processes.