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Analog Devices Inc. ADM809LAKSZ-REEL7
- Part No.:
- ADM809LAKSZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
ADM809LAKSZ-REEL7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,028
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Product details
Overview
ADM809LAKSZ-REEL7 from Analog Devices is a microprocessor supervisory circuit with push-pull active-low RESET output, 4.63 V reset threshold, −40°C to +125°C operating temperature range, and 17 μA supply current. It monitors VCC in embedded systems and asserts reset for 240 ms (typical) during power-up, brownout, or power-down events down to 1 V VCC.
For engineers reviewing the ADM809LAKSZ-REEL7 datasheet, ADM809LAKSZ-REEL7 pinout, ADM809LAKSZ-REEL7 application, or ADM809LAKSZ-REEL7 equivalent, key selection criteria include reset threshold accuracy (±1.5% over temp), SC70-3 package footprint, push-pull drive capability (3.2 mA sink at VTH min), low-power operation, and guaranteed reset assertion below 1 V VCC.
Technical Context
The ADM809LAKSZ-REEL7 integrates a precision voltage comparator with built-in glitch immunity and an internal 240 ms reset timeout timer. Its reference circuit maintains stable threshold detection across −40°C to +125°C, enabling reliable reset generation even during fast transients on VCC.
It features a push-pull RESET output capable of sinking 3.2 mA at minimum threshold voltage and sourcing up to 800 μA, eliminating need for external pull-up resistors. The device operates continuously down to 1.0 V VCC, ensuring valid reset signaling during deep brownout conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.63 V (±1.5% over −40°C to +125°C); ensures reliable detection of 5 V supply undervoltage before microprocessor malfunction. |
| Supply Current | 17 μA (typ) at VCC < 3.6 V; enables integration into battery-powered or ultra-low-power embedded systems without significant load. |
| Reset Timeout | 240 ms (typ) power-on delay; holds microprocessor in reset until power rail stabilizes, preventing premature execution. |
| VCC Operating Range | 1.0 V to 5.5 V; guarantees functional reset assertion even during severe brownout down to 1 V, critical for fail-safe shutdown. |
| RESET Output Type | Push-pull active-low; drives logic directly without external components, supports 3.2 mA sink and 800 μA source at full spec. |
| Temperature Range | −40°C to +125°C; qualified for automotive under-hood, industrial control, and harsh-environment applications. |
| Package | 3-lead SC70 (KS-3); 1.25 mm × 2.00 mm footprint, compatible with high-density PCB layouts and reflow assembly. |
Pinout & Package
ADM809LAKSZ-REEL7 uses a 3-lead SC70 (KS-3) package with exposed pad not electrically connected. 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 reset output | Push-pull driver asserts logic low during fault; sinks 3.2 mA at VTH min, eliminates need for external pull-up resistor. |
| VCC (Pin 3) | Supply voltage input | Monitored rail input; device remains functional and asserts RESET down to 1.0 V, enabling early brownout detection. |
Key Features
| Feature | Design Value |
|---|---|
| Precision reset threshold | 4.63 V ±1.5% over −40°C to +125°C; minimizes false resets and ensures deterministic microprocessor startup timing. |
| Ultra-low quiescent current | 17 μA typical; reduces standby power in always-on systems and extends battery life in portable instrumentation. |
| Brownout detection down to 1 V | Valid RESET assertion at VCC ≥ 1.0 V; provides fail-safe reset signaling during deep supply collapse before logic corruption. |
| Glitch-immune comparator | Immune to transients ≤ 100 mV overdrive for <400 μs; prevents spurious resets caused by switching noise or EMI on VCC. |
| SC70-3 compact packaging | 1.25 mm × 2.00 mm footprint; saves board space in space-constrained designs such as IoT edge nodes and automotive ECUs. |
Applications
| Industrial PLC Controller | Automotive Body Control Module |
|---|---|
|
Use Scenario: Power monitoring in programmable logic controller CPU boards subjected to wide ambient temperature swings and noisy 24 V DC supplies. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low RESET to ARM Cortex-M7 core during 24 V rail sag or cold-cranking events. Use Value: Guaranteed 240 ms reset hold time and 1 V VCC operation prevent firmware lockup during engine start transients. |
Use Scenario: Reset management in body control units powered from vehicle battery with load-dump and jump-start stress conditions. IC Role / Device Role / Timing Role: Voltage monitor triggering hardware reset of Infineon AURIX TC3xx MCU when battery drops below 4.5 V during accessory mode. Use Value: ±1.5% threshold accuracy over −40°C to +125°C ensures consistent reset behavior across full automotive temperature range. |
| Medical Patient Monitor | Smart Energy Meter |
|
Use Scenario: Critical power sequencing in Class II medical devices using isolated DC/DC converters and backup supercapacitors. IC Role / Device Role / Timing Role: Generating clean, glitch-free reset pulse to TI MSP432E401Y microcontroller during capacitor discharge recovery. Use Value: Built-in comparator glitch immunity prevents false resets from converter switching noise, meeting IEC 60601-1 reliability requirements. |
Use Scenario: Tamper-resistant metering platform requiring secure boot and brownout recovery in utility-grade electricity meters. IC Role / Device Role / Timing Role: Enforcing deterministic reset of STMicroelectronics STM32L4+ during AC line dropout or lightning-induced sags. Use Value: 17 μA supply current enables long-term backup operation from coin-cell battery during extended mains failure. |
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 package, 20 μA max supply current, 140 ms min reset timeout. | Limited to −40°C to +85°C; lacks extended 125°C rating and tighter threshold tolerance (±2.5%). | Preferred where cost sensitivity outweighs extended temperature qualification and precision requirements. |
| TPS3808G15DBVR | 4.63 V threshold, SOT-23-6 package, adjustable delay option, 1.6 μA typical quiescent current. | Requires external capacitor for delay setting; larger footprint and higher design complexity than fixed 240 ms solution. | Chosen when programmable reset timeout or ultra-low sleep current (<2 μA) is mandatory for energy harvesting systems. |
Compared with MAX809LUR+T, ADM809LAKSZ-REEL7 delivers superior thermal robustness and tighter threshold stability for automotive and industrial use; versus TPS3808G15DBVR, it offers simpler implementation with factory-trimmed timing and smaller SC70 footprint despite higher quiescent current.
Availability
ADM809LAKSZ-REEL7 is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, medical patient monitors, and smart energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ADM809LAKSZ-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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.
The ADM809LAKSZ-REEL7 belongs to Analog Devices' microprocessor supervisory IC family, designed specifically for deterministic power-on reset, brownout protection, and fail-safe microcontroller initialization in mission-critical embedded systems.
FAQ
What is the reset timeout duration of the ADM809LAKSZ-REEL7?
The ADM809LAKSZ-REEL7 provides a typical reset timeout of 240 ms after VCC rises above the 4.63 V threshold. This value varies from 140 ms to 460 ms over −40°C to +85°C and from 100 ms to 840 ms at 85°C to 125°C, ensuring robust startup timing across full operating range. The ADM809LAKSZ-REEL7 uses an internal timer to guarantee this delay without external components.
Does the ADM809LAKSZ-REEL7 require an external pull-up resistor on the RESET pin?
No, the ADM809LAKSZ-REEL7 features a push-pull RESET output, so no external pull-up resistor is needed. It actively drives logic low during reset assertion and logic high when deasserted, supporting 3.2 mA sink and up to 800 μA source capability. This differs from open-drain variants like the ADM803 series, which do require external pull-ups.
What is the minimum VCC voltage at which the ADM809LAKSZ-REEL7 continues to assert RESET?
The ADM809LAKSZ-REEL7 maintains valid RESET assertion down to 1.0 V VCC across its full −40°C to +125°C operating range. Below this voltage, the output enters high-impedance state; however, the device guarantees functional reset behavior through the critical brownout region where most microprocessors lose operational integrity.
Is the ADM809LAKSZ-REEL7 RoHS compliant?
Yes, the ADM809LAKSZ-REEL7 is RoHS compliant, indicated by the "Z" suffix in the part number per Analog Devices' ordering guide. It meets EU Directive 2011/65/EU requirements and contains no lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls (PBB), or polybrominated diphenyl ethers (PBDE).
How does the ADM809LAKSZ-REEL7 handle fast transients on the VCC line?
The ADM809LAKSZ-REEL7 incorporates a glitch-immune reset comparator that rejects transients up to 100 mV overdrive for durations under 400 μs. This design prevents false resets caused by switching noise, ESD coupling, or power rail disturbances-critical for reliable operation in electrically noisy environments like motor drives or automotive subsystems.
ADM809LAKSZ-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- SC-70-3
ADM809LAKSZ-REEL7 FAQ
1.How can I place an order for ADM809LAKSZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM809LAKSZ-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 ADM809LAKSZ-REEL7 reliable?
The price and inventory of ADM809LAKSZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM809LAKSZ-REEL7 is usually 5 days.
3.What payment methods are accepted for ADM809LAKSZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM809LAKSZ-REEL7 transactions.
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4.How is shipping managed for ADM809LAKSZ-REEL7?
ADM809LAKSZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM809LAKSZ-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 ADM809LAKSZ-REEL7?
For technical support, including ADM809LAKSZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM809LAKSZ-REEL7 requirements.
6.How does Aetrix verify that ADM809LAKSZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All ADM809LAKSZ-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 ADM809LAKSZ-REEL7 meets industry standards.
7.What is the process for return or replacement of ADM809LAKSZ-REEL7?
All ADM809LAKSZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM809LAKSZ-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 ADM809LAKSZ-REEL7 part is unused and in its original packaging.
Return procedure for ADM809LAKSZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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