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Analog Devices Inc. ADM809RARTZ-REEL
- Part No.:
- ADM809RARTZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
ADM809RARTZ-REEL.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,286
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Product details
Overview
ADM809RARTZ-REEL from Analog Devices is a microprocessor supervisory circuit with push-pull active-low RESET output, 2.63 V reset threshold, −40°C to +125°C operating temperature range, and 140–460 ms power-on reset timeout. It monitors VCC down to 1 V and consumes only 17 μA typical supply current, enabling reliable reset assertion in low-power embedded controllers.
For engineers reviewing the ADM809RARTZ-REEL datasheet, ADM809RARTZ-REEL pinout, ADM809RARTZ-REEL application, or ADM809RARTZ-REEL equivalent, key selection criteria include reset threshold accuracy (±2.7% over temperature), SOT-23-3 package compatibility, push-pull drive capability (3.2 mA sink at VTH min), and guaranteed operation down to 1 V VCC during brownout conditions.
Technical Context
The ADM809RARTZ-REEL integrates a precision voltage comparator with built-in glitch immunity and an internal 240 ms (typical) reset timer. Its reset assertion remains valid even as VCC drops to 1 V, ensuring deterministic microprocessor initialization during power-up, power-down, and brownout events.
It features a fixed 2.63 V reset threshold (ADM8xxR variant), operates across −40°C to +125°C, and delivers push-pull RESET output compatible with standard CMOS/TTL logic interfaces without requiring external pull-up components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.63 V (±2.7% over −40°C to +125°C); ensures reliable detection of 2.7 V nominal supply collapse. |
| Reset Timeout | 140–460 ms (−40°C to +85°C); guarantees sufficient hold time for microprocessor core stabilization. |
| Supply Current | 17 μA typical (VCC < 3.6 V); enables integration into battery-powered or energy-constrained systems. |
| VCC Operating Range | 1.0 V to 5.5 V; supports reset assertion during deep brownout and compatibility with 1.2 V–5 V logic domains. |
| RESET Output Type | Push-pull active-low; drives directly into CMOS/TTL inputs without external pull-up resistor. |
| Output Drive Strength | 3.2 mA sink at VTH min; ensures robust noise margin and fast edge transitions under load. |
| Temperature Range | −40°C to +125°C; qualified for automotive under-hood and industrial control environments. |
Pinout & Package
ADM809RARTZ-REEL is housed in a 3-lead SOT-23 (RT-3) package, measuring 2.90 mm × 1.30 mm × 1.02 mm, with gull-wing leads and JEDEC-compliant footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal comparator and timer; must be connected to system ground plane for accurate threshold sensing. |
| 2 | RESET | Active-low push-pull output; asserts low during power-up/brownout and holds for ≥140 ms after VCC exceeds 2.63 V. |
| 3 | VCC | Monitored supply input; powers internal circuitry and serves as reference for reset comparator. |
Key Features
| Feature | Design Value |
|---|---|
| Precision reset threshold | 2.63 V with ±2.7% tolerance over full temperature range, eliminating need for external trimming. |
| Ultra-low quiescent current | 17 μA typical enables >10-year battery life in always-on monitoring applications. |
| Brownout resilience | Valid RESET assertion down to 1.0 V VCC ensures no spurious release during supply sag. |
| Glitch-immune comparator | Immune to transients ≤100 mV/μs on VCC, preventing false resets from switching noise. |
| Extended temperature qualification | −40°C to +125°C operation supports automotive engine control and industrial motor drive use cases. |
Applications
| Industrial PLC Controller | Automotive Body Control Module |
|---|---|
Use Scenario: Monitors 2.7 V auxiliary rail powering MCU and CAN transceiver in programmable logic controller cabinet exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: Supervisory circuit providing power-on reset pulse and brownout detection to prevent firmware corruption during grid instability. Use Value: 2.63 V threshold matches 2.7 V rail tolerance; 125°C rating ensures reliability in uncooled enclosures; 17 μA current minimizes standby loss. | Use Scenario: Embedded in door module ECU to supervise 2.7 V microcontroller supply during cold cranking (battery dip to 6 V) and hot soak (ambient 105°C). IC Role / Device Role / Timing Role: Reset generator asserting low until stable 2.7 V rail is confirmed, synchronizing MCU boot with power rail recovery. Use Value: Valid operation down to 1 V VCC prevents premature release during cranking; push-pull output eliminates pull-up resistor space and BOM cost. |
| Medical Infusion Pump | Smart Energy Meter |
Use Scenario: Ensures safe restart of ARM Cortex-M4 MCU after mains interruption or battery switchover in Class II medical device. IC Role / Device Role / Timing Role: Fail-safe reset supervisor enforcing minimum 140 ms hold time to guarantee memory initialization before peripheral enable. Use Value: RoHS-compliant (Z suffix) and AEC-Q200-aligned thermal performance meet IEC 60601-1 safety requirements. | Use Scenario: Monitors 2.7 V RTC and metering ASIC supply in DIN-rail mounted electricity meter operating continuously at 70°C ambient. IC Role / Device Role / Timing Role: Brownout detector holding MCU in reset during voltage sags caused by transformer inrush or grid flicker. Use Value: 2.63 V threshold provides 3% hysteresis margin above 2.55 V minimum operating voltage; 17 μA draw extends supercap lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809RTRG+T | 2.63 V threshold, SOT-23-3, but 1.2 mA sink (vs. 3.2 mA), 20 μA typical supply current. | Limited drive strength may require series resistor for high-capacitance buses; higher current reduces battery life. | Prefer ADM809RARTZ-REEL when driving >100 pF loads or optimizing for ultra-low power. |
| TPS3808G12DBVR | 2.63 V threshold, SOT-23-6, open-drain output, adjustable delay via capacitor, 1.1 μA quiescent current. | Requires external pull-up and timing capacitor; smaller footprint not possible due to 6-pin layout. | Choose ADM809RARTZ-REEL for drop-in replacement in existing 3-pin layouts and push-pull simplicity. |
Compared with MAX809RTRG+T and TPS3808G12DBVR, ADM809RARTZ-REEL offers superior sink drive (3.2 mA), lower quiescent current (17 μA vs. 20 μA), and true 3-pin push-pull integration-reducing BOM count and PCB area while maintaining identical threshold and temperature specs.
Availability
ADM809RARTZ-REEL is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, medical infusion pumps, and smart energy meters requiring stable component supply across extended temperature and long-lifecycle programs.
Supply support for ADM809RARTZ-REEL 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 ADM809 series belongs to Analog Devices' microprocessor supervisory product line, engineered specifically for deterministic power-on reset generation and brownout protection in harsh-environment embedded systems.
FAQ
What is the exact reset threshold voltage of ADM809RARTZ-REEL and how does it vary with temperature?
The ADM809RARTZ-REEL has a nominal reset threshold of 2.63 V, specified as 2.55 V to 2.70 V over −40°C to +85°C and 2.52 V to 2.74 V over −40°C to +125°C. This ±2.7% variation ensures reliable detection of 2.7 V supply collapse across automotive and industrial temperature ranges without requiring calibration.
Does ADM809RARTZ-REEL require an external pull-up resistor on the RESET pin?
No, ADM809RARTZ-REEL features a push-pull RESET output and does not require an external pull-up resistor. Its active-low output actively drives low (≤0.4 V at 3.2 mA sink) and high (≥0.8×VCC at 500 μA source), simplifying interface design and reducing component count compared to open-drain alternatives like ADM803.
What is the minimum VCC voltage at which ADM809RARTZ-REEL continues to assert RESET?
ADM809RARTZ-REEL maintains valid RESET assertion down to VCC = 1.0 V, as confirmed in the Absolute Maximum Ratings and General Description sections. Below 1.0 V, the output enters high-impedance state; for VCC = 0 V operation, a 100 kΩ pull-down is recommended per Analog Devices Application Note.
How does the reset timeout period of ADM809RARTZ-REEL change with temperature?
The ADM809RARTZ-REEL reset timeout is specified as 140–460 ms over −40°C to +85°C and 100–840 ms over +85°C to +125°C. The typical value is 240 ms at 25°C, with variation primarily due to internal RC timing element drift-ensuring sufficient hold time across all operating conditions.
Is ADM809RARTZ-REEL RoHS compliant and what does the 'Z' suffix indicate?
Yes, ADM809RARTZ-REEL is RoHS compliant. The 'Z' suffix in the part number explicitly denotes compliance with EU Directive 2011/65/EU (RoHS 2), verified by Analog Devices' material declarations and manufacturing process controls. It also indicates bottom-side date code marking per the Ordering Guide.
ADM809RARTZ-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.63V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
ADM809RARTZ-REEL FAQ
1.How can I place an order for ADM809RARTZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM809RARTZ-REEL 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 ADM809RARTZ-REEL reliable?
The price and inventory of ADM809RARTZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM809RARTZ-REEL is usually 5 days.
3.What payment methods are accepted for ADM809RARTZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM809RARTZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM809RARTZ-REEL?
ADM809RARTZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM809RARTZ-REEL 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 ADM809RARTZ-REEL?
For technical support, including ADM809RARTZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM809RARTZ-REEL requirements.
6.How does Aetrix verify that ADM809RARTZ-REEL is sourced from the original manufacturer or authorized distributors?
All ADM809RARTZ-REEL 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 ADM809RARTZ-REEL meets industry standards.
7.What is the process for return or replacement of ADM809RARTZ-REEL?
All ADM809RARTZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with ADM809RARTZ-REEL, 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 ADM809RARTZ-REEL part is unused and in its original packaging.
Return procedure for ADM809RARTZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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