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Analog Devices Inc. ADM6339QARJZ-RL7
- Part No.:
- ADM6339QARJZ-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
ADM6339QARJZ-RL7.pdf
- Description:
- IC SUPERVISOR 4 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
ADM6339QARJZ-RL7 from Analog Devices is a quad-voltage microprocessor supervisory circuit that monitors four independent supply rails with factory-configured thresholds: adjustable 0.62 V (±0.8% accuracy) on IN1 and IN3, and −0.5 V (±2.0% accuracy) on IN4, all referenced to IN2 = 3.3 V supply. It delivers active-low open-drain RESET with 200 ms typical timeout, operates from −40°C to +85°C, and draws only 55 μA quiescent current - ideal for space-constrained telecom and server power sequencing.
For engineers reviewing the ADM6339QARJZ-RL7 datasheet, ADM6339QARJZ-RL7 pinout, ADM6339QARJZ-RL7 application, or ADM6339QARJZ-RL7 equivalent, key selection considerations include its triple adjustable threshold configuration (0.62 V / 0.62 V / −0.5 V), guaranteed RESET validity down to IN1 or IN2 = 1 V, ±0.8% accuracy on 0.62 V inputs, 0.47% hysteresis on IN4, and SOT-23-6 package compatibility with high-density PCB layouts.
Technical Context
The ADM6339QARJZ-RL7 implements four independent voltage comparators with internal reference trimming: two 0.62 V thresholds (IN1, IN3), one −0.5 V threshold (IN4), and IN2 serving as both monitored rail and internal power supply. Each comparator features built-in hysteresis (0.3% for IN1/IN3, 0.47% for IN4) and glitch immunity validated up to 900 µs transient duration at 10 mV overdrive.
Its RESET output is open-drain with a 10 µA internal pull-up to IN2, remains valid while IN1 ≥ 1 V or IN2 ≥ 1 V, and asserts low when any input crosses its threshold - rising above for negative thresholds (−0.5 V), falling below for positive thresholds (0.62 V). The 200 ms reset timeout is temperature-stable (±12 ms over −40°C to +85°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Input | IN2 powers device and sets RESET pull-up source; operates from 1.0 V to 5.5 V. |
| Threshold Accuracy | ±0.8% for 0.62 V inputs (IN1, IN3); ±2.0% for −0.5 V input (IN4). |
| Reset Timeout | 200 ms typical delay after all voltages exceed thresholds - stable across temperature (±12 ms). |
| Quiescent Current | 55 μA total supply current enables ultra-low-power system monitoring. |
| Input Hysteresis | 0.3% of threshold for IN1/IN3; 0.47% for IN4 - suppresses false resets from noise. |
| RESET Output | Open-drain with 10 μA internal pull-up to IN2; VOL ≤ 0.4 V at ISINK = 2 mA (VIN2 = 5 V). |
| Operating Temp | −40°C to +85°C - qualified for industrial and telecom infrastructure environments. |
Pinout & Package
ADM6339QARJZ-RL7 is housed in a JEDEC-compliant 6-lead SOT-23 (RJ-6) package, 2.80–3.00 mm × 1.50–1.70 mm × 1.15–1.30 mm, with gull-wing leads and pin 1 indicator.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN1) | Monitored Input 1 | 0.62 V adjustable threshold input; requires external resistor divider to monitor higher positive rails. |
| 2 (IN2) | Power Supply & Monitor Input | Device power source and second monitored rail (3.3 V nominal); internal pull-up reference for RESET. |
| 3 (IN3) | Monitored Input 3 | 0.62 V adjustable threshold input; functionally identical to IN1 for dual low-voltage rail monitoring. |
| 4 (IN4) | Monitored Input 4 | −0.5 V adjustable threshold input; monitors negative rails; polarity inverted vs. positive inputs. |
| 5 (GND) | Ground Reference | Analog ground return for all comparators and internal circuitry; must be low-impedance. |
| 6 (RESET) | Active-Low Reset Output | Open-drain output asserting low during fault; internal 10 μA pull-up to IN2 eliminates need for external resistor in many cases. |
Key Features
| Feature | Design Value |
|---|---|
| Triple Adjustable Thresholds | Supports precise monitoring of two 0.62 V rails (e.g., core logic, I/O) and one −0.5 V rail (e.g., bias supply) without external references. |
| Glitch-Immune Timing | Validates input transients up to 900 µs at 10 mV overdrive - prevents spurious resets in noisy power environments. |
| Low-Power Supervision | 55 μA total supply current enables always-on monitoring in battery-backed or energy-sensitive systems. |
| Wide Validity Range | RESET remains functional even if IN1 or IN2 drops to 1 V - critical for brown-out detection during power ramp-down. |
| SOT-23 Footprint | 6-pin compact package allows integration into dense server motherboard VRM monitoring and telecom line card designs. |
Applications
| Telecom Power Sequencing | Server Baseboard Management |
|---|---|
Use Scenario: Monitoring multiple DC/DC converter outputs (e.g., 0.62 V CPU core, 0.62 V memory I/O, −0.5 V analog bias) on a 48 V telecom shelf power module. IC Role / Device Role / Timing Role: Quad-supply supervisor triggering coordinated system reset when any rail deviates beyond ±0.8% (0.62 V) or ±2.0% (−0.5 V) tolerance. Use Value: Ensures deterministic boot sequence and prevents latch-up by asserting RESET until all three monitored rails stabilize within spec for ≥200 ms. | Use Scenario: Embedded controller supervision on a dual-socket x86 server motherboard, verifying 0.62 V PCH I/O, 0.62 V BMC supply, and −0.5 V clock buffer bias before enabling PCIe lanes. IC Role / Device Role / Timing Role: Fault-detection hub generating single RESET signal tied to platform controller hub (PCH) RST# input. Use Value: Eliminates need for discrete comparators and RC timers, reducing BOM count while guaranteeing 200 ms minimum reset pulse width per Intel VRD specs. |
| Data Storage Controller | Industrial Edge Gateway |
Use Scenario: NVMe SSD controller board requiring validation of 0.62 V FPGA core, 0.62 V flash interface, and −0.5 V serializer supply prior to PCIe enumeration. IC Role / Device Role / Timing Role: System-level power-good arbiter feeding RESET to FPGA fabric and PCIe PHY. Use Value: Prevents partial initialization by holding FPGA in reset until all three critical supplies meet tight ±0.8% accuracy requirements. | Use Scenario: Ruggedized edge gateway with isolated power domains monitoring 0.62 V MCU core, 0.62 V sensor interface, and −0.5 V RF front-end bias under −40°C to +85°C ambient. IC Role / Device Role / Timing Role: Temperature-hardened supervisory IC ensuring reliable cold-start behavior across full industrial range. Use Value: Maintains 55 μA supply current and valid RESET assertion down to IN2 = 1 V - enabling graceful shutdown during wide-input-range DC-DC sag. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad-voltage supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6342EUT+T | Triple fixed thresholds (3.08 V / 2.93 V / 2.63 V); no negative or sub-1 V adjustable options. | Limited to positive-only rail monitoring; lacks −0.5 V capability and 0.62 V precision. | Select only if design uses only standard 3.3 V / 3.0 V / 2.5 V rails and does not require negative or ultra-low-voltage supervision. |
| TPS3808G33DBVR | Single 3.3 V fixed threshold; no multi-rail or adjustable capability. | Requires three separate ICs to match ADM6339QARJZ-RL7's quad monitoring - increases footprint and BOM cost. | Choose only for simple single-rail reset where space and cost allow duplication, not for integrated quad supervision. |
Compared with MAX6342EUT+T and TPS3808G33DBVR, ADM6339QARJZ-RL7 uniquely supports simultaneous monitoring of two 0.62 V rails and one −0.5 V rail with ±0.8%/±2.0% accuracy in a single SOT-23-6 package - eliminating discrete solutions and enabling compact, high-accuracy power sequencing for advanced digital systems.
Availability
ADM6339QARJZ-RL7 is available at Aetrix Electronics and suitable for telecom infrastructure, server baseboard management, and industrial edge gateway applications requiring stable component supply, RoHS compliance, and extended temperature operation.
Supply support for ADM6339QARJZ-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, headquartered in Norwood, MA.
The ADM6339 family delivers quad-voltage supervision with configurable thresholds for mission-critical power sequencing in telecom, computing, and industrial systems - designed to replace discrete comparator-based solutions with integrated accuracy and reliability.
FAQ
What voltage thresholds does the ADM6339QARJZ-RL7 monitor?
The ADM6339QARJZ-RL7 monitors four inputs with the following factory-configured thresholds: IN1 = 0.62 V (±0.8% accuracy), IN2 = 3.3 V (power supply and monitored rail), IN3 = 0.62 V (±0.8% accuracy), and IN4 = −0.5 V (±2.0% accuracy). These values are fixed per the ordering code QARJZ-RL7 and cannot be reconfigured in-circuit.
How does the ADM6339QARJZ-RL7 handle negative voltage monitoring on IN4?
The ADM6339QARJZ-RL7 treats IN4 as an inverted comparator: RESET asserts when IN4 rises *above* −0.5 V (i.e., becomes less negative), unlike positive inputs which trigger on voltage drop. This behavior is inherent to the −0.5 V threshold option and is documented in the ADM6339QARJZ-RL7 datasheet Section "Theory of Operation".
What is the minimum operating voltage for the ADM6339QARJZ-RL7's RESET output to remain valid?
The ADM6339QARJZ-RL7 RESET output remains valid and correctly asserted as long as either IN1 ≥ 1 V or IN2 ≥ 1 V. This ensures reliable brown-out detection even during deep supply sag - a key specification confirmed in the ADM6339QARJZ-RL7 Absolute Maximum Ratings table and General Description.
Does the ADM6339QARJZ-RL7 require external pull-up resistors on the RESET pin?
No, the ADM6339QARJZ-RL7 includes a 10 μA internal pull-up to IN2, making external pull-up resistors unnecessary in most applications. An external pull-up is only needed if interfacing with a logic supply voltage outside the 0 V to 5.5 V range supported by the internal pull-up - and even then, the internal circuitry prevents reverse current flow into IN2.
What is the temperature coefficient of the ADM6339QARJZ-RL7's threshold voltage?
According to the ADM6339QARJZ-RL7 datasheet specifications table, the reset threshold temperature coefficient (TCVTH) is 60 ppm/°C across the −40°C to +85°C operating range. This value applies uniformly to all threshold options, including the 0.62 V and −0.5 V settings used in this variant.
ADM6339QARJZ-RL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 4
- Voltage - Threshold:
- 2.93V, Adj, Adj, Adj
- 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
ADM6339QARJZ-RL7 FAQ
1.How can I place an order for ADM6339QARJZ-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM6339QARJZ-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 ADM6339QARJZ-RL7 reliable?
The price and inventory of ADM6339QARJZ-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM6339QARJZ-RL7 is usually 5 days.
3.What payment methods are accepted for ADM6339QARJZ-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM6339QARJZ-RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM6339QARJZ-RL7?
ADM6339QARJZ-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM6339QARJZ-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 ADM6339QARJZ-RL7?
For technical support, including ADM6339QARJZ-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM6339QARJZ-RL7 requirements.
6.How does Aetrix verify that ADM6339QARJZ-RL7 is sourced from the original manufacturer or authorized distributors?
All ADM6339QARJZ-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 ADM6339QARJZ-RL7 meets industry standards.
7.What is the process for return or replacement of ADM6339QARJZ-RL7?
All ADM6339QARJZ-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM6339QARJZ-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 ADM6339QARJZ-RL7 part is unused and in its original packaging.
Return procedure for ADM6339QARJZ-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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