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Analog Devices Inc. ADM809TAKSZ-REEL7
- Part No.:
- ADM809TAKSZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
ADM809TAKSZ-REEL7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,830
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Product details
Overview
ADM809TAKSZ-REEL7 from Analog Devices is a 3-pin microprocessor supervisory circuit with push-pull active-low RESET output, 3.08 V reset threshold, −40°C to +125°C operating temperature range, and 17 μA typical supply current. It monitors VCC in embedded microprocessor systems and asserts reset during power-up, brownout, or power-down conditions down to 1 V VCC.
For engineers reviewing the ADM809TAKSZ-REEL7 datasheet, ADM809TAKSZ-REEL7 pinout, ADM809TAKSZ-REEL7 application, or ADM809TAKSZ-REEL7 equivalent, key selection criteria include reset threshold accuracy (±2.5% over temperature), guaranteed 240 ms minimum reset timeout, SC70 package compatibility, and push-pull drive capability without external pull-up.
Technical Context
The ADM809TAKSZ-REEL7 integrates a precision voltage comparator with built-in glitch immunity and an internal 240 ms reset timer. Its reference circuit maintains stable threshold detection across −40°C to +125°C, enabling reliable reset assertion even during fast VCC transients.
It operates as a standalone reset generator with no external components required: VCC monitoring occurs directly at the supply rail, RESET asserts low when VCC drops below 3.08 V (±2.5%), and remains asserted for ≥240 ms after VCC recovers above threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08 V ±2.5% over −40°C to +125°C - ensures valid reset assertion for 3.3 V systems under worst-case voltage droop and temperature drift |
| Reset Timeout | 240 ms typical, 140–460 ms min/max over temperature - guarantees sufficient processor initialization time before release |
| Supply Current | 17 μA typical at VCC < 3.6 V - enables integration into battery-powered or ultra-low-power embedded systems |
| VCC Operating Range | 1.0 V to 5.5 V - supports reset assertion even during deep brownout conditions down to 1 V |
| Output Type | Push-pull active-low RESET - drives logic inputs directly without external pull-up resistor |
| Reset Output Low | ≤0.3 V at 50 μA sink - ensures solid logic-low interface with CMOS/TTL microcontrollers |
| Reset Output High | ≥0.8 × VCC at 500 μA source - provides robust high-level drive for noise-immune signaling |
Pinout & Package
ADM809TAKSZ-REEL7 is housed in a 3-lead SC70 (KS-3) package, measuring 2.00 mm × 1.25 mm × 0.9 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 - sinks current during reset, sources current when deasserted; interfaces directly to µP /RESET pin |
| 3 | VCC | Monitored supply input - connects to the voltage rail being supervised (e.g., 3.3 V I/O or core rail) |
Key Features
| Feature | Design Value |
|---|---|
| Precision reset threshold | 3.08 V with ±2.5% tolerance over full −40°C to +125°C range - eliminates need for external trimming in automotive/industrial designs |
| Glitch-immune comparator | Immune to transients ≤100 µs at 100 mV overdrive - prevents spurious resets during switching noise or ESD events |
| Low-voltage operation | Valid RESET assertion down to 1.0 V VCC - ensures fail-safe behavior during deep undervoltage conditions |
| Ultra-low quiescent current | 17 μA typical - reduces standby power in always-on IoT edge nodes and portable instrumentation |
| SC70 footprint | 2.0 mm × 1.25 mm body - enables high-density PCB layouts in space-constrained controllers and wearables |
Applications
| Industrial PLC Controller | Automotive Body Control Module |
|---|---|
Use Scenario: Monitors 3.3 V microcontroller supply in programmable logic controller with extended temperature operation. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low reset during cold cranking (VCC dip to 2.8 V) and hot ambient (125°C). Use Value: Guarantees 240 ms reset hold time ensures full MCU register initialization before code execution begins. |
Use Scenario: Provides power-on reset for infotainment SoC in vehicle cabin electronics exposed to −40°C startup and 105°C sustained operation. IC Role / Device Role / Timing Role: Voltage monitor with 3.08 V threshold tracking 3.3 V rail tolerance; push-pull output drives SoC /RESET without pull-up. Use Value: 17 μA supply current minimizes parasitic drain on vehicle battery during long-term parking mode. |
| Medical Patient Monitor | Smart Energy Meter |
Use Scenario: Ensures deterministic boot sequence for ARM Cortex-M4 in portable diagnostic device with Li-ion backup. IC Role / Device Role / Timing Role: Brownout detector asserting reset when main 3.3 V rail falls below 3.08 V during battery transition. Use Value: Glitch-immune comparator prevents false resets caused by ECG signal coupling onto supply lines. |
Use Scenario: Supervises 3.3 V communication interface in DIN-rail meter operating continuously at 85°C ambient. IC Role / Device Role / Timing Role: Reset generator with 125°C-rated performance and 2.5% threshold stability over life. Use Value: SC70 package allows placement near isolated RS-485 transceiver without thermal interference. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TTRG+T | 3.08 V threshold, SOT-23-3 package, 20 μA supply current, 140 ms min reset timeout | Higher quiescent current and shorter min timeout reduce margin in low-power, long-initialization systems | Select when SOT-23 footprint is required and 140 ms reset hold is sufficient |
| TPS3808G30DBVR | 3.0 V threshold (±0.5%), 1.5 μA supply current, adjustable delay via capacitor, 6-pin SOT-23 | Lower threshold and adjustable timing require layout changes and additional BOM item | Select when ultra-low power (<2 μA) and configurable timeout outweigh fixed-threshold simplicity |
Compared with MAX809TTRG+T and TPS3808G30DBVR, the ADM809TAKSZ-REEL7 delivers tighter threshold accuracy (±2.5% vs ±3.5% and ±0.5%), higher temperature rating (+125°C vs +85°C and +125°C), and smaller SC70 footprint - making it optimal for space-constrained, wide-temperature industrial control where fixed 240 ms timing is preferred.
Availability
ADM809TAKSZ-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 ADM809TAKSZ-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 leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA, with design centers worldwide and ISO 9001-certified manufacturing.
The ADM809TAKSZ-REEL7 belongs to Analog Devices' microprocessor supervisory IC product line, engineered specifically for deterministic power-on reset, brownout protection, and fail-safe operation in harsh-environment embedded systems.
FAQ
What is the exact reset threshold voltage of the ADM809TAKSZ-REEL7 and how does it vary with temperature?
The ADM809TAKSZ-REEL7 has a nominal reset threshold of 3.08 V at 25°C, with guaranteed limits of 3.00 V to 3.15 V over −40°C to +85°C and 2.95 V to 3.21 V over −40°C to +125°C. This ±2.5% tolerance ensures reliable detection of 3.3 V rail undervoltage across full industrial and automotive temperature ranges without calibration.
Does the ADM809TAKSZ-REEL7 require an external pull-up resistor on the RESET pin?
No, the ADM809TAKSZ-REEL7 features a push-pull RESET output and does not require an external pull-up resistor. Its active-low output actively drives low during reset and actively drives high when deasserted, simplifying interface to microcontroller /RESET inputs and reducing BOM count.
What is the minimum VCC voltage at which the ADM809TAKSZ-REEL7 can still assert a valid RESET signal?
The ADM809TAKSZ-REEL7 maintains valid RESET assertion down to 1.0 V VCC, as specified in its absolute maximum ratings and functional description. Below 1.0 V, the output enters high-impedance state; above 1.0 V, RESET remains asserted until VCC rises above the 3.08 V threshold and the 240 ms timer expires.
Is the ADM809TAKSZ-REEL7 RoHS compliant and what does the 'Z' suffix indicate?
Yes, the 'Z' in ADM809TAKSZ-REEL7 indicates RoHS compliance per EU Directive 2011/65/EU. The device contains no lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls (PBB), or polybrominated diphenyl ethers (PBDE), and is marked with date code 'XX' on the bottom per Analog Devices' RoHS packaging standard.
How does the ADM809TAKSZ-REEL7 differ from the ADM803TAKSZ-REEL7 and ADM810TAKSZ-REEL7?
The ADM809TAKSZ-REEL7 differs from ADM803TAKSZ-REEL7 by using a push-pull (not open-drain) RESET output, eliminating the need for an external pull-up. It differs from ADM810TAKSZ-REEL7 by providing active-low (not active-high) RESET output - matching the reset polarity expected by most legacy and modern microcontrollers.
ADM809TAKSZ-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:
- 3.08V
- 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
ADM809TAKSZ-REEL7 FAQ
1.How can I place an order for ADM809TAKSZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM809TAKSZ-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 ADM809TAKSZ-REEL7 reliable?
The price and inventory of ADM809TAKSZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM809TAKSZ-REEL7 is usually 5 days.
3.What payment methods are accepted for ADM809TAKSZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM809TAKSZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM809TAKSZ-REEL7?
ADM809TAKSZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM809TAKSZ-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 ADM809TAKSZ-REEL7?
For technical support, including ADM809TAKSZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM809TAKSZ-REEL7 requirements.
6.How does Aetrix verify that ADM809TAKSZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All ADM809TAKSZ-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 ADM809TAKSZ-REEL7 meets industry standards.
7.What is the process for return or replacement of ADM809TAKSZ-REEL7?
All ADM809TAKSZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM809TAKSZ-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 ADM809TAKSZ-REEL7 part is unused and in its original packaging.
Return procedure for ADM809TAKSZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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