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Analog Devices Inc. ADM809LART-REEL7
- Part No.:
- ADM809LART-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
ADM809LART-REEL7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,345
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Product details
Overview
ADM809LART-REEL7 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 qualified for −40°C to +125°C industrial/automotive environments. It monitors 5 V supply rails in embedded controllers and intelligent instruments.
For engineers reviewing the ADM809LART-REEL7 datasheet, ADM809LART-REEL7 pinout, ADM809LART-REEL7 application, or ADM809LART-REEL7 equivalent, key selection criteria include reset threshold accuracy (±2.5% over temperature), push-pull drive capability (3.2 mA sink at VTH min), SOT-23-3 package compatibility, and guaranteed operation during brownout conditions down to 1 V VCC.
Technical Context
The ADM809LART-REEL7 integrates a precision voltage comparator with built-in glitch immunity and an internal 240 ms reset timer. Its reset assertion remains valid even as VCC drops to 1.0 V, enabling reliable brownout detection without external components.
It uses a bandgap-based reference with 30 ppm/°C temperature coefficient and supports direct interfacing to CMOS/TTL logic due to its push-pull output structure-eliminating need for external pull-up resistors unlike open-drain variants such as ADM803.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63 V (±2.5% over −40°C to +125°C); precisely monitors 5 V systems before undervoltage lockout. |
| Supply Current | 17 μA typical at VCC < 3.6 V; enables long battery life in portable instrumentation. |
| VCC Operating Range | 1.0 V to 5.5 V; ensures functional reset assertion during deep brownout events. |
| Reset Timeout | 240 ms typical power-on delay; holds microprocessor in reset until supply stabilizes. |
| Output Type | Push-pull active-low RESET; drives logic inputs directly without external pull-up. |
| Temperature Range | −40°C to +125°C; qualified for under-hood automotive and industrial control applications. |
| Reset Output Low Voltage | 0.4 V at ISINK = 3.2 mA and VCC = VTH min; guarantees TTL/CMOS-compatible low state. |
Pinout & Package
ADM809LART-REEL7 is housed in a 3-lead SOT-23 (RT-3) package with 1.3 mm × 2.9 mm footprint and 0.95 mm height, compliant with JEDEC TO-236-AB standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground Reference | 0 V return path for internal comparator and reset generator; must be connected to system ground plane. |
| 2 (RESET) | Active-Low Push-Pull Output | Drives low during reset condition (VCC < 4.63 V) and high otherwise; sinks up to 3.2 mA. |
| 3 (VCC) | Supply Input | Monitored voltage rail; powers internal circuitry and defines reset threshold reference point. |
Key Features
| Feature | Design Value |
|---|---|
| Precision Reset Threshold | 4.63 V ±2.5% over full temperature range ensures consistent 5 V supply monitoring across operating conditions. |
| Brownout Detection | Functional down to 1.0 V VCC enables early fault detection before processor core fails. |
| Glitch-Immune Comparator | Built-in filtering rejects fast transients ≤100 µs on VCC, preventing spurious resets. |
| Low Power Consumption | 17 μA typical supply current minimizes impact on battery-powered system runtime. |
| Industrial Temperature Grade | −40°C to +125°C qualification supports deployment in engine control units and motor drives. |
Applications
| Industrial PLC Controller | Automotive Body Control Module |
|---|---|
Use Scenario: Monitors 5 V microcontroller supply in programmable logic controller cabinets exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low RESET during cold cranking voltage sag or thermal shutdown events. Use Value: Prevents erratic firmware execution by holding MCU in reset until 5 V rail recovers above 4.63 V with 240 ms stabilization window. | Use Scenario: Embedded in body control unit managing door locks, lighting, and HVAC functions near vehicle battery. IC Role / Device Role / Timing Role: Brownout detector triggering controlled shutdown when battery dips below 4.63 V during engine start. Use Value: Eliminates data corruption in EEPROM writes by ensuring MCU reset occurs before VCC falls below safe operating margin. |
| Medical Infusion Pump | Smart Energy Meter |
Use Scenario: Ensures deterministic startup of ARM-based controller powering precision stepper motor drivers and pressure sensors. IC Role / Device Role / Timing Role: Power-on reset generator with 240 ms timeout guaranteeing stable clock and memory initialization. Use Value: Meets IEC 60601-1 safety requirement for fail-safe behavior during AC/DC adapter brownouts. | Use Scenario: Supervises 5 V rail derived from isolated DC-DC converter in utility-grade meter with 15-year field life target. IC Role / Device Role / Timing Role: Voltage monitor with 30 ppm/°C drift limiting threshold error to <±0.5% over lifetime. Use Value: Maintains accurate reset assertion across −25°C to +70°C operating range without calibration drift. |
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-23-3, push-pull active-low output; 20 μA max supply current vs. 35 μA typ for ADM809LART-REEL7. | Qualified to −40°C to +85°C only; lacks extended +125°C rating. | Select for cost-sensitive commercial applications where extended temperature is not required. |
| TPS3808G15DBVR | 4.63 V threshold, SOT-23-6, open-drain output; requires external pull-up; 1.4 μA quiescent current. | Includes manual reset input and watchdog timer-functionality beyond basic supervision. | Select when system-level reliability requires manual reset capability or watchdog timeout supervision. |
Compared with MAX809LUR+T, ADM809LART-REEL7 offers wider temperature support and lower typical supply current; compared with TPS3808G15DBVR, it provides simpler integration via push-pull output but lacks manual reset and watchdog features.
Availability
ADM809LART-REEL7 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 ranges.
Supply support for ADM809LART-REEL7 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 semiconductor company 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, designed specifically for robust power-monitoring in harsh-environment embedded systems where deterministic reset behavior is critical.
FAQ
What is the reset threshold voltage of ADM809LART-REEL7 and how stable is it over temperature?
The ADM809LART-REEL7 has a nominal reset threshold of 4.63 V, with tolerance of ±2.5% over the full −40°C to +125°C operating range. Its internal bandgap reference exhibits a temperature coefficient of 30 ppm/°C, ensuring minimal drift across thermal extremes. This stability allows reliable 5 V rail monitoring in automotive and industrial applications where supply variation must not trigger false resets.
Does ADM809LART-REEL7 require an external pull-up resistor on the RESET pin?
No, ADM809LART-REEL7 does not require an external pull-up resistor because it features a push-pull RESET output. Unlike open-drain variants such as ADM803, the ADM809LART-REEL7 actively drives both high and low states-delivering 0.4 V at 3.2 mA sink current and >0.8×VCC at 800 μA source current. This simplifies PCB layout and eliminates pull-up component count.
Can ADM809LART-REEL7 operate during severe brownout conditions?
Yes, ADM809LART-REEL7 remains fully functional down to VCC = 1.0 V, enabling reliable reset assertion during deep brownout events. Its internal circuitry continues to compare VCC against the 4.63 V threshold and maintain RESET low until VCC rises above threshold plus hysteresis. This capability prevents premature release from reset when supply voltage recovers incompletely.
What is the power-on reset timeout duration for ADM809LART-REEL7?
The ADM809LART-REEL7 provides a minimum power-on reset timeout of 140 ms and a typical duration of 240 ms over −40°C to +85°C, extending to 840 ms maximum at +125°C. This internal timer ensures the microprocessor remains held in reset long enough for clocks, PLLs, and memory subsystems to stabilize after power application, meeting common MCU boot requirements.
Is ADM809LART-REEL7 RoHS compliant and what packaging format does it use?
Yes, ADM809LART-REEL7 is RoHS compliant (indicated by "Z" suffix in ordering guide) and supplied in tape-and-reel format (REEL7 = 3,000-piece reel). It uses a 3-lead SOT-23 (RT-3) package with JEDEC TO-236-AB footprint, measuring 2.9 mm × 1.3 mm × 0.95 mm, optimized for automated surface-mount assembly in high-volume manufacturing.
ADM809LART-REEL7 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-REEL7 FAQ
1.How can I place an order for ADM809LART-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM809LART-REEL7 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-REEL7 reliable?
The price and inventory of ADM809LART-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM809LART-REEL7 is usually 5 days.
3.What payment methods are accepted for ADM809LART-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM809LART-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM809LART-REEL7?
ADM809LART-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM809LART-REEL7 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-REEL7?
For technical support, including ADM809LART-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM809LART-REEL7 requirements.
6.How does Aetrix verify that ADM809LART-REEL7 is sourced from the original manufacturer or authorized distributors?
All ADM809LART-REEL7 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-REEL7 meets industry standards.
7.What is the process for return or replacement of ADM809LART-REEL7?
All ADM809LART-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM809LART-REEL7, 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-REEL7 part is unused and in its original packaging.
Return procedure for ADM809LART-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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