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Analog Devices Inc. ADM809LART-REEL
- Part No.:
- ADM809LART-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
ADM809LART-REEL.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,599
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Product details
Overview
ADM809LART-REEL from Analog Devices is a microprocessor supervisory circuit with push-pull active-low RESET output, 4.63 V reset threshold, and operation down to 1.0 V VCC. It provides 240 ms minimum power-on reset timeout, consumes 17 μA typical supply current, and is housed in a 3-lead SOT-23 package for embedded power monitoring in space-constrained systems.
For engineers reviewing the ADM809LART-REEL datasheet, ADM809LART-REEL pinout, ADM809LART-REEL application, or ADM809LART-REEL equivalent, key selection criteria include reset threshold accuracy (±2.5% over −40°C to +125°C), guaranteed reset assertion below 1 V VCC, push-pull drive capability (3.2 mA sink at VTH min), and compatibility with 3 V/5 V microprocessor interfaces without external pull-up.
Technical Context
The ADM809LART-REEL integrates a precision voltage comparator with built-in glitch immunity and an internal 240 ms reset timer. Its reset threshold is trimmed to 4.63 V at 25°C with ±2.5% tolerance across −40°C to +125°C and 30 ppm/°C temperature coefficient.
It operates as a standalone power-on reset generator with no external components required. The push-pull output drives logic inputs directly-no pull-up resistor needed-and remains functional during brownout conditions down to VCC = 1.0 V, ensuring deterministic reset behavior during supply collapse.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63 V ±2.5% over −40°C to +125°C - ensures reliable detection of 5 V supply undervoltage before microprocessor malfunction. |
| Supply Current | 17 μA typical at VCC < 3.6 V - enables use in battery-powered or ultra-low-power systems without compromising reset integrity. |
| Reset Timeout | 240 ms typical power-on delay - holds microprocessor in reset long enough for clock and supply stabilization. |
| VCC Operating Range | 1.0 V to 5.5 V - guarantees reset assertion even during deep brownout or partial power loss. |
| RESET Output Type | Push-pull active-low - drives CMOS/TTL loads directly; sinks 3.2 mA at VTH min, eliminating need for external pull-up. |
| Temperature Range | −40°C to +125°C - supports automotive under-hood, industrial control, and extended-temperature embedded applications. |
| Package | 3-Lead SOT-23 (RT-3) - surface-mount footprint compatible with high-density PCB layouts and automated assembly. |
Pinout & Package
ADM809LART-REEL is packaged in a 3-lead SOT-23 (RT-3) outline per JEDEC TO-236-AB, with 1.30 mm × 2.90 mm body size, 0.95 mm height, and coplanarity ≤0.10 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Ground reference | 0 V return path for internal comparator and reset generator; must be connected to system ground plane for noise immunity. |
| RESET (Pin 2) | Active-low push-pull output | Drives low during reset condition (VCC < 4.63 V) and high after timeout; sinks up to 3.2 mA, sources limited current via internal p-channel device. |
| VCC (Pin 3) | Monitored supply input | Input voltage source being supervised; powers internal circuitry and determines reset state; functional down to 1.0 V. |
Key Features
| Feature | Design Value |
|---|---|
| Precision reset threshold | 4.63 V with ±2.5% tolerance over full temperature range - eliminates need for external trimming or calibration in 5 V systems. |
| Ultra-low quiescent current | 17 μA typical - reduces standby power in always-on monitoring circuits and extends battery life in portable equipment. |
| Brownout immunity | Reset assertion guaranteed down to VCC = 1.0 V - prevents spurious release during supply sag or slow discharge. |
| Glitch-immune comparator | Built-in filtering rejects fast transients up to 100 mV overdrive - avoids false resets from switching noise or ESD events. |
| Fixed 240 ms timeout | Internally timed power-on delay - removes dependency on external RC networks and improves production consistency. |
Applications
| Industrial PLC Controller | Automotive Body Control Module |
|---|---|
Use Scenario: Monitors 5 V auxiliary supply powering MCU, CAN transceivers, and I/O drivers in programmable logic controllers operating in factory environments with wide ambient temperature swings. IC Role / Device Role / Timing Role: Supervisory circuit providing power-on reset and brownout protection; asserts RESET until 5 V rail stabilizes and remains asserted if voltage drops below 4.63 V. Use Value: Prevents erratic MCU execution during cold start or line disturbance; enables deterministic boot sequence without software intervention. | Use Scenario: Integrated into vehicle body control unit to supervise 5 V domain powering door lock actuators, lighting drivers, and sensor interfaces exposed to load dump and battery rundown conditions. IC Role / Device Role / Timing Role: Voltage monitor with push-pull output directly interfacing to MCU's nRST pin; maintains reset state during cranking-induced 12 V drop and subsequent 5 V rail collapse. Use Value: Ensures safe shutdown and clean restart of safety-critical functions; eliminates risk of partial initialization due to marginal supply voltage. |
| Medical Infusion Pump | Network Router Power Management |
Use Scenario: Supervises main 5 V DC-DC output powering ARM-based controller and motor drivers in Class II medical devices requiring fail-safe power sequencing. IC Role / Device Role / Timing Role: Reset generator with 240 ms fixed timeout and 1.0 V VCC operational floor - guarantees reset hold time exceeds worst-case power rail rise time. Use Value: Meets IEC 60601-1 requirements for controlled startup; prevents unintended actuator motion during power transition. | Use Scenario: Embedded in enterprise-grade router to monitor 5 V management rail feeding baseband processor, PHY, and fan controller in thermally stressed chassis. IC Role / Device Role / Timing Role: Precision voltage supervisor asserting RESET on undervoltage; push-pull output eliminates timing uncertainty from external pull-up RC constant. Use Value: Reduces boot failure rate in high-availability systems; supports hot-swap power module replacement without firmware corruption. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809LUR+T | 4.63 V threshold, SOT-23, push-pull active-low output, but 1.2 V minimum VCC and 20 μA typical supply current. | Not rated for operation below 1.2 V VCC - unsuitable for deep brownout detection where ADM809LART-REEL functions down to 1.0 V. | Select MAX809LUR+T only when 1.2 V VCC floor is acceptable and higher supply current is tolerable. |
| TPS3808G33DBVR | 3.3 V threshold (not 4.63 V), adjustable delay option, 1.5 μA quiescent current, but requires external capacitor for timeout setting. | Fixed 4.63 V threshold and internal 240 ms timer make ADM809LART-REEL simpler for 5 V systems without design-in overhead. | Choose TPS3808G33DBVR only if lower threshold or programmable delay is required; otherwise ADM809LART-REEL offers plug-and-play 5 V supervision. |
Compared with MAX809LUR+T and TPS3808G33DBVR, ADM809LART-REEL uniquely combines 4.63 V precision threshold, 1.0 V operational floor, and fixed 240 ms timeout in a zero-component SOT-23 solution-making it optimal for cost-sensitive, space-constrained 5 V microprocessor reset applications demanding highest reliability under brownout.
Availability
ADM809LART-REEL is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, and medical device applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for ADM809LART-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, Inc. is a global semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and control.
The ADM809 series belongs to Analog Devices' microprocessor supervisory product line, engineered for deterministic power-on reset and brownout protection in mission-critical embedded systems operating across extended industrial and automotive temperature ranges.
FAQ
What is the reset threshold voltage of the ADM809LART-REEL and how stable is it over temperature?
The ADM809LART-REEL has a nominal reset threshold of 4.63 V at 25°C, with a tolerance of ±2.5% over the full −40°C to +125°C operating range. Its temperature coefficient is 30 ppm/°C, resulting in a maximum deviation of approximately ±30 mV across the temperature span. This stability ensures consistent 5 V supply monitoring without recalibration in harsh thermal environments.
Does the ADM809LART-REEL require an external pull-up resistor on the RESET pin?
No, the ADM809LART-REEL features a push-pull RESET output and does not require an external pull-up resistor. Its output actively drives high (up to VCC − 1.5 V at 800 μA source) and low (≤0.4 V at 3.2 mA sink), enabling direct interface to standard CMOS or TTL reset inputs without additional components.
Can the ADM809LART-REEL operate when the supply voltage drops below 1.5 V?
Yes, the ADM809LART-REEL remains fully functional down to VCC = 1.0 V, guaranteeing reset assertion during severe brownout conditions. Below 1.0 V, reset behavior is not specified; however, at 1.0 V, the device continues to monitor and assert RESET as long as VCC stays below 4.63 V, providing critical fail-safe coverage beyond most competing supervisors.
What is the power-on reset timeout duration for the ADM809LART-REEL?
The ADM809LART-REEL provides a fixed 240 ms typical power-on reset timeout after VCC rises above the 4.63 V threshold. This value is internally generated and guaranteed between 140 ms and 460 ms over −40°C to +85°C, and between 100 ms and 840 ms at 85°C to 125°C, ensuring robust reset hold time across all operating conditions.
Is the ADM809LART-REEL RoHS compliant and what packaging format does it use?
Yes, the ADM809LART-REEL is RoHS compliant (indicated by the "Z" suffix in ordering codes) and supplied in tape-and-reel format (REEL designation). It uses a 3-lead SOT-23 (RT-3) package per JEDEC TO-236-AB, with dimensions of 2.90 mm × 1.30 mm × 0.95 mm and lead-free matte tin plating.
ADM809LART-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:
- 4.63V
- 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
ADM809LART-REEL FAQ
1.How can I place an order for ADM809LART-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM809LART-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 ADM809LART-REEL reliable?
The price and inventory of ADM809LART-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM809LART-REEL is usually 5 days.
3.What payment methods are accepted for ADM809LART-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM809LART-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM809LART-REEL?
ADM809LART-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM809LART-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 ADM809LART-REEL?
For technical support, including ADM809LART-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM809LART-REEL requirements.
6.How does Aetrix verify that ADM809LART-REEL is sourced from the original manufacturer or authorized distributors?
All ADM809LART-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 ADM809LART-REEL meets industry standards.
7.What is the process for return or replacement of ADM809LART-REEL?
All ADM809LART-REEL units undergo pre-shipment inspection (PSI). If there is an issue with ADM809LART-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 ADM809LART-REEL part is unused and in its original packaging.
Return procedure for ADM809LART-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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