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Analog Devices Inc. ADM6339NARJZ-RL7
- Part No.:
- ADM6339NARJZ-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
ADM6339NARJZ-RL7.pdf
- Description:
- IC SUPERVISOR 4 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
ADM6339NARJZ-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 ±5% 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 in a 6-lead SOT-23 package for embedded power sequencing in telecom and server systems.
For engineers reviewing the ADM6339NARJZ-RL7 datasheet, ADM6339NARJZ-RL7 pinout, ADM6339NARJZ-RL7 application, or ADM6339NARJZ-RL7 equivalent, key selection criteria include its four-rail monitoring capability, factory-trimmed −5.0 V negative supply detection, 10 μA internal pull-up on RESET, guaranteed operation down to IN1 or IN2 = 1 V, and compatibility with multi-supply microprocessor reset architectures requiring glitch immunity and temperature-stable thresholds.
Technical Context
The ADM6339NARJZ-RL7 integrates four independent voltage comparators with pretrimmed thresholds: +5.0 V (−5% tol), +3.0 V (−5% tol), +1.23 V (adjustable, ±2.0% accuracy), and −5.0 V (+5% tol). Each input features 0.3% VTH hysteresis for transient immunity, and IN2 serves as both monitored rail and device power supply.
RESET assertion occurs when any input crosses its threshold-decreasing for positive rails, increasing for −5.0 V-and remains low for 200 ms (140–280 ms range) after all inputs recover. The open-drain output pulls low to ≤0.4 V at 2 mA sink while sourcing 10 μA via internal pull-up to IN2, enabling logic-level interfacing without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Monitoring | +5.0 V, +3.0 V, +1.23 V (adjustable), −5.0 V rails with factory-set thresholds |
| Threshold Tolerance | ±5% for all four inputs-enables precise brownout detection without external calibration |
| Reset Timeout | 200 ms typical (140–280 ms)-ensures stable processor initialization after power recovery |
| Quiescent Current | 55 μA at VIN2 = 3.0–3.3 V-minimizes impact on system standby power budget |
| Operating Temp | −40°C to +85°C-supports industrial and telecom equipment deployment |
| RESET Output | Open-drain with 10 μA internal pull-up to IN2-eliminates need for external pull-up in many 3.3 V logic interfaces |
| Input Validity | RESET remains valid down to IN1 = 1 V or IN2 = 1 V-extends supervision coverage during deep brownout |
Pinout & Package
ADM6339NARJZ-RL7 is housed in a JEDEC-compliant 6-lead SOT-23 (RJ-6) package measuring 2.90 × 1.60 × 1.15 mm, optimized for high-density PCB layouts in space-constrained telecom and server applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN1 | Monitored Input 1 | +5.0 V rail input with −5% threshold (4.50–4.75 V); must be connected to system 5 V supply |
| IN2 | Monitored Input 2 / Power Supply | +3.0 V rail input (2.70–2.85 V threshold) and sole device power source-critical for RESET functionality |
| IN3 | Monitored Input 3 | Adjustable +1.23 V input (1.20–1.26 V threshold); used with external resistor divider to monitor custom voltages |
| IN4 | Monitored Input 4 | −5.0 V rail input with +5% threshold (−4.75 to −4.50 V); requires negative supply connection |
| GND | Ground Reference | Analog ground return for all comparators and RESET driver-must tie to system power ground plane |
| RESET | Active-Low Reset Output | Open-drain output asserting low during fault; internal 10 μA pull-up to IN2 enables direct interface to 3.3 V microprocessor reset pin |
Key Features
| Feature | Design Value |
|---|---|
| Quad-rail monitoring | Simultaneously supervises +5 V, +3 V, adjustable +1.23 V, and −5 V supplies-replaces multiple discrete supervisors in multi-rail systems |
| Factory-trimmed −5 V detection | Integrated −5.0 V comparator eliminates need for external level-shifting circuitry when monitoring legacy negative rails |
| Glitch-immune comparators | 0.3% VTH hysteresis per input rejects sub-100 ns transients-prevents spurious resets in electrically noisy server environments |
| Low-power operation | 55 μA supply current enables continuous supervision in battery-backed or always-on subsystems without compromising energy efficiency |
| Extended validity range | RESET signal remains functional even when IN1 or IN2 drops to 1 V-provides fail-safe reset assertion during severe undervoltage conditions |
Applications
| Telecom Line Cards | Server Motherboards |
|---|---|
Use Scenario: Monitoring +5 V, +3 V, −5 V, and auxiliary bias rails on carrier-grade line cards with strict power sequencing requirements. IC Role / Device Role / Timing Role: Quad-supply supervisor ensuring synchronized reset assertion across FPGA, DSP, and analog front-end ICs during AC power loss or hot-swap events. Use Value: Eliminates risk of partial initialization by guaranteeing all rails exceed thresholds before releasing RESET, leveraging 200 ms timeout to accommodate slow-rising supplies. | Use Scenario: Supervising core, I/O, and legacy peripheral rails-including −5 V for legacy backplane interfaces-in dual-socket x86 server motherboards. IC Role / Device Role / Timing Role: Centralized reset controller coordinating power-good signaling between VRMs, BMC, and CPU, with −5 V detection supporting legacy add-in cards. Use Value: Reduces BOM count by consolidating four independent voltage monitors into one 6-pin SOT-23, saving >25 mm² PCB area versus discrete solutions. |
| Data Storage Controllers | Industrial Microprocessor Systems |
Use Scenario: Ensuring reliable power-up sequencing for SAS/SATA controller ASICs, DDR memory, and flash storage ICs in enterprise SSD enclosures. IC Role / Device Role / Timing Role: Fault-detection hub validating +5 V (power), +3 V (I/O), +1.23 V (core), and −5 V (legacy interface) before enabling PCIe link training and NAND initialization. Use Value: Prevents data corruption during marginal power conditions using ±5% threshold accuracy and 0.3% hysteresis to reject noise-induced false triggers. | Use Scenario: Providing robust reset management for ARM-based PLC controllers operating in harsh industrial environments with wide ambient temperature swings. IC Role / Device Role / Timing Role: Temperature-stable supervisor maintaining reset integrity from −40°C to +85°C while monitoring main, backup, and sensor bias rails. Use Value: Guarantees functional reset behavior across full industrial temperature range with <60 ppm/°C threshold drift, eliminating need for external compensation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6339EUT+T | Same 6-pin SOT-23 package and quad-monitor function but offers +5 V, +3.3 V, +2.5 V, and adjustable thresholds; no −5 V option. | Lacks integrated −5 V detection-requires external resistor network to monitor negative rails, increasing design complexity and error margin. | Select when system uses only positive rails and prioritizes Maxim's long-term supply continuity over negative rail support. |
| TPS3808G33DBVR | Dual-supply supervisor (not quad) with +3.3 V and adjustable threshold; smaller 5-pin SOT-23 package; no negative rail capability. | Cannot replace ADM6339NARJZ-RL7 in systems requiring simultaneous −5 V and three positive rail monitoring without adding secondary supervisor ICs. | Choose for cost-sensitive, space-constrained designs with only two critical rails and no legacy −5 V requirement. |
Compared with MAX6339EUT+T and TPS3808G33DBVR, the ADM6339NARJZ-RL7 uniquely supports integrated −5 V supervision alongside three positive rails in a single 6-pin package, delivering net BOM reduction and eliminating external level-shifting components required by alternatives for negative rail detection.
Availability
ADM6339NARJZ-RL7 is available at Aetrix Electronics and suitable for telecom infrastructure, server motherboard design, and industrial microprocessor systems requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for ADM6339NARJZ-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.
The ADM6339 product line delivers compact, low-power quad-supervisory circuits designed specifically for multi-rail microprocessor systems where space, power, and reliability are critical-enabling consolidation of discrete voltage monitors without sacrificing accuracy or temperature stability.
FAQ
What voltage rails does the ADM6339NARJZ-RL7 monitor and what are their exact thresholds?
The ADM6339NARJZ-RL7 monitors +5.0 V (4.50–4.75 V), +3.0 V (2.70–2.85 V), adjustable +1.23 V (1.20–1.26 V), and −5.0 V (−4.75 to −4.50 V) rails, all with ±5% factory-trimmed tolerance. These values are confirmed in the Rev. A datasheet Table 1 under Fixed Threshold Voltage specifications and Ordering Guide entry ADM6339NARJZ-RL7.
Does the ADM6339NARJZ-RL7 require an external pull-up resistor on the RESET pin?
No, the ADM6339NARJZ-RL7 includes a 10 μA internal pull-up to IN2, making external pull-up resistors unnecessary in most 3.3 V logic interfaces. External pull-ups are only needed when interfacing with higher-voltage logic families, and the device prevents reverse current flow into IN2 per datasheet Figure 17 and RESET Output Configuration section.
How does the ADM6339NARJZ-RL7 handle negative voltage monitoring for the −5.0 V rail?
The ADM6339NARJZ-RL7 integrates a dedicated −5.0 V comparator with +5% tolerance (−4.75 to −4.50 V), eliminating external level-shifting components. Its IN4 pin accepts direct connection to the −5 V supply, and the internal architecture ensures valid RESET assertion even when IN1 or IN2 drops to 1 V, as specified in the General Description and Absolute Maximum Ratings sections.
What is the guaranteed operating temperature range for the ADM6339NARJZ-RL7?
The ADM6339NARJZ-RL7 is fully specified and tested from −40°C to +85°C, with performance parameters including threshold accuracy, reset timeout, and supply current validated across this extended industrial temperature range per datasheet Rev. A Page 3 Specifications table and Ordering Guide.
Can unused input pins on the ADM6339NARJZ-RL7 be left floating?
No-unused inputs must not float or be grounded. Per datasheet General Description and Input Configuration sections, unused IN3 or IN4 with positive thresholds should connect directly to IN2, while unused IN4 configured for −5.0 V must tie to a more negative supply. Floating inputs risk erratic RESET behavior due to comparator instability.
ADM6339NARJZ-RL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 4
- Voltage - Threshold:
- 2.78V, 4.63V, Adj, -4.63V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
ADM6339NARJZ-RL7 FAQ
1.How can I place an order for ADM6339NARJZ-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM6339NARJZ-RL7 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ADM6339NARJZ-RL7 reliable?
The price and inventory of ADM6339NARJZ-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM6339NARJZ-RL7 is usually 5 days.
3.What payment methods are accepted for ADM6339NARJZ-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM6339NARJZ-RL7 transactions.
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4.How is shipping managed for ADM6339NARJZ-RL7?
ADM6339NARJZ-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM6339NARJZ-RL7 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ADM6339NARJZ-RL7?
For technical support, including ADM6339NARJZ-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM6339NARJZ-RL7 requirements.
6.How does Aetrix verify that ADM6339NARJZ-RL7 is sourced from the original manufacturer or authorized distributors?
All ADM6339NARJZ-RL7 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ADM6339NARJZ-RL7 meets industry standards.
7.What is the process for return or replacement of ADM6339NARJZ-RL7?
All ADM6339NARJZ-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM6339NARJZ-RL7, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ADM6339NARJZ-RL7 part is unused and in its original packaging.
Return procedure for ADM6339NARJZ-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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