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Analog Devices Inc. ADM809-5SART-REEL
- Part No.:
- ADM809-5SART-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
ADM809-5SART-REEL.pdf
- Description:
- IC SUPERVISOR MPU 2.93V SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:25,125
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Product details
Overview
ADM809-5SART-REEL from Analog Devices is a microprocessor supervisory circuit in 3-lead SOT-23 package, providing push-pull active-low RESET output with 2.93 V threshold, 140–460 ms reset timeout, 17 μA supply current, and operation down to 1 V VCC. It monitors power supply integrity during power-up, brownout, and power-down in embedded controllers and instrumentation.
For engineers reviewing the ADM809-5SART-REEL datasheet, ADM809-5SART-REEL pinout, ADM809-5SART-REEL application, or ADM809-5SART-REEL equivalent, key selection criteria include reset threshold accuracy (±2.5% over −40°C to +125°C), guaranteed reset assertion at VCC ≥ 1 V, push-pull drive capability (3.2 mA sink), and compatibility with 3 V/5 V logic interfaces without external pull-up.
Technical Context
The ADM809-5SART-REEL integrates a precision voltage comparator with built-in glitch immunity and an internal 240 ms (typical) reset timer. Its reference circuit maintains stable threshold detection across temperature (30 ppm/°C drift), enabling reliable reset assertion even under fast VCC transients (up to 100 V/μs).
As a member of the ADM803/ADM809/ADM810 family, it shares architecture with open-drain (ADM803) and active-high push-pull (ADM810) variants but differs in output polarity and drive strength - specifically optimized for low-power, space-constrained microprocessor systems requiring deterministic reset timing and minimal quiescent current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93 V ±2.5% (−40°C to +125°C); ensures valid reset assertion before 3 V system logic fails. |
| Supply Current | 17 μA (typ) at VCC < 3.6 V; enables battery-backed or energy-harvesting applications. |
| Reset Timeout | 140–460 ms (−40°C to +85°C); holds processor in reset until power stabilizes post-power-up. |
| Minimum Operating VCC | 1.0 V; guarantees functional reset assertion even during deep brownout conditions. |
| Output Type | Push-pull active-low RESET; drives 3.2 mA sink directly into microprocessor reset input without pull-up resistor. |
| Temperature Range | −40°C to +125°C; qualified for industrial and automotive under-hood environments. |
| VCC Operating Range | 1.0 V to 5.5 V; supports monitoring of 1.2 V, 1.8 V, 2.5 V, 3.0 V, 3.3 V, and 5 V rails. |
Pinout & Package
ADM809-5SART-REEL uses a 3-lead SOT-23 (RT-3) package per JEDEC TO-236-AB standard, with 1.30 mm × 2.90 mm footprint and 0.95 mm height. Pin 1 = GND, Pin 2 = RESET (active-low push-pull), Pin 3 = VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Ground reference | Common return path for internal comparator and output stage; must be low-impedance connection to system ground plane. |
| RESET (Pin 2) | Active-low push-pull output | Drives microprocessor reset input directly; sinks 3.2 mA at VTH min; no external pull-up required. |
| VCC (Pin 3) | Monitored supply input | Connects to the rail being supervised (e.g., 3.3 V I/O domain); powers internal circuitry and defines reset threshold reference. |
Key Features
| Feature | Design Value |
|---|---|
| Precision voltage monitor | 2.93 V threshold with ±2.5% tolerance over full temperature range ensures consistent reset point across operating conditions. |
| Low-power operation | 17 μA typical supply current extends battery life in portable and remote sensor nodes. |
| Brownout immunity | Resets asserted down to 1.0 V VCC, preventing erratic behavior during gradual supply collapse. |
| Glitch-immune comparator | Immune to fast VCC transients up to 100 V/μs, eliminating false resets from switching noise or ESD events. |
| Guaranteed reset timing | 140 ms minimum power-on reset timeout meets Intel-compatible and ARM Cortex-M boot requirements. |
Applications
| Industrial PLC Controller | Medical Diagnostic Instrument |
|---|---|
Use Scenario: Power sequencing in programmable logic controller modules with dual 3.3 V and 5 V domains. IC Role / Device Role / Timing Role: Supervises 3.3 V I/O supply and asserts synchronous reset to FPGA and ARM Cortex-A53 during cold start or brownout. Use Value: Prevents configuration lockup by guaranteeing 240 ms (typ) reset hold time while 3.3 V rail stabilizes within ±5%. |
Use Scenario: Battery-powered ultrasound imaging device with low-voltage analog front-end and digital signal processor. IC Role / Device Role / Timing Role: Monitors 2.93 V bias rail for ADC reference and triggers hard reset on VCC drop below 2.85 V. Use Value: Enables safe shutdown before analog signal corruption occurs, preserving data integrity during partial discharge. |
| Automotive Body Control Module | Smart Energy Meter |
Use Scenario: Under-hood ECU exposed to wide temperature swings (−40°C to +125°C) and load-dump transients. IC Role / Device Role / Timing Role: Resets microcontroller when 3.3 V domain falls below 2.93 V due to alternator failure or battery sag. Use Value: Maintains ±2.5% threshold accuracy across full temperature range, avoiding premature or delayed reset in harsh environments. |
Use Scenario: DIN-rail mounted meter with isolated RS-485 interface and real-time clock backup. IC Role / Device Role / Timing Role: Supervises 3.0 V RTC backup supply and asserts reset if voltage drops below 2.93 V during capacitor discharge. Use Value: Ensures RTC state preservation by asserting reset before VCC falls below 2.81 V (min spec at +125°C), preventing register corruption. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809SASE+T | 2.93 V threshold, SOT-23, push-pull active-low, but higher supply current (25 μA typ) and wider temp range (−40°C to +125°C same). | Same 3 V system monitoring use case; less suitable for ultra-low-power designs where 17 μA is critical. | Select ADM809-5SART-REEL when minimizing quiescent current is mandatory; choose MAX809SASE+T if legacy design already uses Maxim footprint and tolerates +8 μA increase. |
| TPS3808G33DBVR | 3.3 V threshold (not 2.93 V), SOT-23, open-drain output, requires external pull-up; 1.6 μA supply current but fixed 3.3 V trip point. | Not interchangeable without circuit redesign; suited only for 3.3 V-only systems needing ultra-low IQ, not mixed-voltage brownout detection. | Only consider TPS3808G33DBVR if redesigning for 3.3 V rail supervision and can add pull-up; ADM809-5SART-REEL remains optimal for 2.93 V accuracy and push-pull simplicity. |
Compared with MAX809SASE+T and TPS3808G33DBVR, ADM809-5SART-REEL uniquely combines 2.93 V precision threshold, 17 μA ultra-low supply current, and push-pull output in a single SOT-23 package - eliminating external components while maintaining industrial-grade temperature performance and brownout robustness.
Availability
ADM809-5SART-REEL is available at Aetrix Electronics and suitable for industrial PLC controllers, medical diagnostic instruments, automotive body control modules, smart energy meters, and intelligent instrumentation requiring stable component supply across extended temperature ranges.
Supply support for ADM809-5SART-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 leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.
The ADM809-5SART-REEL belongs to Analog Devices' microprocessor supervisory IC product line, designed specifically for deterministic power-on reset, brownout protection, and supply voltage monitoring in resource-constrained embedded systems.
FAQ
What is the exact reset threshold voltage of the ADM809-5SART-REEL?
The ADM809-5SART-REEL has a nominal reset threshold of 2.93 V, specified as 2.85 V to 3.00 V over −40°C to +85°C and 2.81 V to 3.05 V over −40°C to +125°C. This matches the "S" variant in the ADM809 family and is confirmed in Table 3 and Ordering Guide of the Rev. I datasheet.
Does the ADM809-5SART-REEL require an external pull-up resistor on the RESET pin?
No, the ADM809-5SART-REEL features a push-pull active-low RESET output and does not require an external pull-up resistor. It can directly drive microprocessor reset inputs with up to 3.2 mA sink current at VTH min, unlike the open-drain ADM803 which mandates a pull-up.
What package type and dimensions does the ADM809-5SART-REEL use?
The ADM809-5SART-REEL uses a 3-lead SOT-23 package (JEDEC TO-236-AB, package option RT-3), measuring 2.90 mm × 1.30 mm × 0.95 mm. Pin 1 is GND, Pin 2 is RESET, and Pin 3 is VCC - matching Figure 3 and Outline Dimension Figure 14 in the datasheet.
Can the ADM809-5SART-REEL operate reliably below 2.0 V VCC?
Yes, the ADM809-5SART-REEL guarantees functional reset assertion down to 1.0 V VCC, with RESET remaining active low until VCC rises above 2.93 V and stays there for ≥140 ms. This enables robust brownout recovery in low-voltage systems such as battery-depleted IoT sensors.
How does the reset timeout of ADM809-5SART-REEL vary with temperature?
The ADM809-5SART-REEL provides a reset active timeout of 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, as shown in Figure 2 and Table 1, ensuring sufficient hold time for microprocessor initialization across all operating conditions.
ADM809-5SART-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.93V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 30ms Minimum
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
ADM809-5SART-REEL FAQ
1.How can I place an order for ADM809-5SART-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM809-5SART-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 ADM809-5SART-REEL reliable?
The price and inventory of ADM809-5SART-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM809-5SART-REEL is usually 5 days.
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4.How is shipping managed for ADM809-5SART-REEL?
ADM809-5SART-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM809-5SART-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 ADM809-5SART-REEL?
For technical support, including ADM809-5SART-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM809-5SART-REEL requirements.
6.How does Aetrix verify that ADM809-5SART-REEL is sourced from the original manufacturer or authorized distributors?
All ADM809-5SART-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 ADM809-5SART-REEL meets industry standards.
7.What is the process for return or replacement of ADM809-5SART-REEL?
All ADM809-5SART-REEL units undergo pre-shipment inspection (PSI). If there is an issue with ADM809-5SART-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 ADM809-5SART-REEL part is unused and in its original packaging.
Return procedure for ADM809-5SART-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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