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Analog Devices Inc. ADM809TAKS-REEL7
- Part No.:
- ADM809TAKS-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
ADM809TAKS-REEL7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,970
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Product details
Overview
ADM809TAKS-REEL7 from Analog Devices is a 3.08 V precision microprocessor supervisory circuit in SC70-3 package, featuring push-pull active-low RESET output, 17 μA supply current, 240 ms typical reset timeout, 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 ADM809TAKS-REEL7 datasheet, ADM809TAKS-REEL7 pinout, ADM809TAKS-REEL7 application, or ADM809TAKS-REEL7 equivalent, key selection criteria include reset threshold accuracy (±1.5% over −40°C to +125°C), guaranteed reset assertion below 1 V VCC, glitch-immune comparator, and compatibility with 3 V/3.3 V systems requiring low-power, high-reliability reset supervision.
Technical Context
The ADM809TAKS-REEL7 integrates a precision voltage reference and comparator to monitor VCC against a fixed 3.08 V threshold, asserting RESET low when VCC falls below the trip point. Its internal timer guarantees minimum 140 ms and typical 240 ms reset pulse width after VCC rises above threshold.
It uses a push-pull output stage capable of sinking 1.2 mA at 0.3 V (VCC = VTH min) and sourcing 500 μA at 0.8×VCC, eliminating need for external pull-up. The device operates across −40°C to +125°C with 30 ppm/°C temperature coefficient on reset threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08 V nominal, ±1.5% over −40°C to +125°C - ensures reliable detection of 3.3 V supply droop before system instability. |
| Supply Current | 17 μA typical at VCC < 3.6 V - enables use in battery-powered and ultra-low-power embedded systems. |
| Reset Timeout | 240 ms typical, 140–460 ms range - holds microprocessor in reset long enough for power rails and clocks to stabilize. |
| VCC Operating Range | 1.0 V to 5.5 V - allows valid reset assertion even during deep brownout or partial power loss. |
| Output Type | Push-pull active-low RESET - drives logic inputs directly without external components; sinks 1.2 mA at 0.3 V. |
| Temperature Range | −40°C to +125°C - qualified for automotive under-hood, industrial control, and harsh-environment applications. |
| Package | 3-lead SC70 (KS-3) - 2.0 mm × 2.1 mm footprint, compatible with high-density PCB layouts and reflow assembly. |
Pinout & Package
ADM809TAKS-REEL7 is housed in a 3-lead SC70 (KS-3) package per JEDEC standard, with 0.65 mm lead pitch and coplanarity ≤ 0.10 mm. Pin 1 is GND, Pin 2 is RESET (active-low push-pull), and Pin 3 is VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Ground reference | Return path for all internal circuits; must be connected to system ground plane for accurate threshold sensing. |
| RESET (Pin 2) | Active-low reset output | Drives microprocessor /RESET input low during fault; pushes high or pulls low actively-no external pull-up required. |
| VCC (Pin 3) | Monitored supply input | Connects to the 3.3 V rail being supervised; powers internal circuitry and defines reset threshold reference. |
Key Features
| Feature | Design Value |
|---|---|
| Precision 3.08 V threshold | ±1.5% tolerance over full temperature range ensures consistent reset point across 3.3 V system variations. |
| Glitch-immune comparator | Rejects transients up to 100 mV overdrive for ≤ 350 µs - prevents spurious resets from supply noise or coupling. |
| 1 V VCC operation | RESET remains asserted down to 1.0 V - guarantees clean reset hold-through severe brownout conditions. |
| Low 17 μA quiescent current | Minimizes standby power draw in always-on monitoring applications such as smart sensors and IoT edge nodes. |
| SC70-3 footprint | 2.0 mm × 2.1 mm area saves >40% board space vs. SOT-23-3 - ideal for space-constrained portable and modular designs. |
Applications
| Industrial PLC Controller | Medical Diagnostic Handheld |
|---|---|
Use Scenario: Monitors 3.3 V FPGA core supply in programmable logic controller modules subject to voltage sags during relay switching. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low reset to FPGA configuration logic until 3.3 V rail stabilizes post-power-up or transient recovery. Use Value: Prevents partial configuration and metastability by guaranteeing ≥240 ms reset hold time and detecting droop to 3.0 V with ±1.5% accuracy. |
Use Scenario: Ensures safe boot sequence in battery-powered ultrasound probe with dual 3.3 V analog/digital rails. IC Role / Device Role / Timing Role: Primary reset supervisor for ARM Cortex-M4 MCU, triggered only when main 3.3 V supply exceeds 3.08 V with hysteresis. Use Value: Enables reliable cold-start from depleted Li-ion (down to 3.0 V) while consuming just 17 μA during sleep mode. |
| Automotive Body Control Module | Smart Energy Meter |
Use Scenario: Supervises 3.3 V microcontroller supply in under-dash BCM exposed to load dump and cold-crank conditions. IC Role / Device Role / Timing Role: Reset generator holding MCU in reset during VCC dip below 3.08 V; operates down to 1.0 V to survive cranking events. Use Value: Eliminates software lockup by asserting reset even during 6 V cranking dips, with guaranteed 140 ms minimum pulse width. |
Use Scenario: Provides fail-safe reset for metrology SoC in DIN-rail energy meters operating continuously at 85°C ambient. IC Role / Device Role / Timing Role: High-temp-stable supervisor for 3.3 V digital supply, maintaining ±1.5% threshold accuracy from −40°C to +125°C. Use Value: Prevents erroneous kWh accumulation during thermal cycling by rejecting false resets via built-in glitch immunity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TTRD7 | 3.08 V threshold, SOT-23-3 package, 20 μA supply current, 140 ms min reset timeout | Higher quiescent current and larger SOT-23 footprint; lacks SC70 space savings | Choose when legacy SOT-23 layout reuse is prioritized over board area reduction |
| TPS3808G30DBVR | 3.0 V threshold (±0.5%), 1.5 μA supply current, adjustable delay option, SOT-23-6 | Lower threshold, ultra-low power, but requires external capacitor for timing and occupies more pins/area | Choose when sub-μA standby current is critical and board space permits 6-pin SOT-23 |
Compared with MAX809TTRD7 and TPS3808G30DBVR, ADM809TAKS-REEL7 delivers optimal balance of SC70 space efficiency, guaranteed 240 ms reset timing, and robust 1 V operation-making it preferred for new compact, high-reliability 3.3 V embedded designs where pin count and footprint are constrained.
Availability
ADM809TAKS-REEL7 is available at Aetrix Electronics and suitable for industrial control systems, medical handheld devices, automotive body electronics, and smart metering applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ADM809TAKS-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, serving industrial, automotive, communications, and healthcare markets since 1965.
The ADM809 series belongs to Analog Devices' precision power monitoring product line, engineered specifically for deterministic reset generation in safety-critical and thermally demanding microprocessor systems.
FAQ
What is the exact reset threshold voltage of ADM809TAKS-REEL7 and how does it vary with temperature?
The ADM809TAKS-REEL7 has a nominal reset threshold of 3.08 V, 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. Its temperature coefficient is 30 ppm/°C, meaning threshold drift is ≤ ±0.3% across the full industrial temperature range - ensuring stable supervision of 3.3 V rails despite thermal stress.
Does ADM809TAKS-REEL7 require an external pull-up resistor on the RESET pin?
No, ADM809TAKS-REEL7 features a push-pull RESET output and does not require an external pull-up resistor. Its output actively drives high (to 0.8×VCC) and low (to 0.3 V at 1.2 mA sink), enabling direct interface with standard CMOS microprocessor /RESET inputs without additional components.
Can ADM809TAKS-REEL7 operate reliably during severe brownout conditions?
Yes, ADM809TAKS-REEL7 asserts RESET down to 1.0 V VCC and remains functional through deep brownouts. Its internal circuitry continues monitoring and holding reset active until VCC recovers above 3.08 V and sustains the 240 ms timeout - preventing erratic MCU behavior during marginal supply conditions.
What is the package type and footprint of ADM809TAKS-REEL7, and is it RoHS compliant?
ADM809TAKS-REEL7 uses the 3-lead SC70 (KS-3) package, measuring 2.0 mm × 2.1 mm with 0.65 mm lead pitch. It is RoHS compliant (indicated by "Z" suffix in ordering code), lead-free, and qualified for reflow soldering per JEDEC J-STD-020.
How does the glitch immunity of ADM809TAKS-REEL7 prevent false resets?
The ADM809TAKS-REEL7 reset comparator rejects fast transients: for example, a 100 mV overdrive (VTH − VCC) is tolerated for up to 350 µs without triggering reset. This immunity is achieved via internal filtering and hysteresis, ensuring only sustained supply faults-not EMI or switching noise-cause reset assertion.
ADM809TAKS-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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
ADM809TAKS-REEL7 FAQ
1.How can I place an order for ADM809TAKS-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM809TAKS-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 ADM809TAKS-REEL7 reliable?
The price and inventory of ADM809TAKS-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM809TAKS-REEL7 is usually 5 days.
3.What payment methods are accepted for ADM809TAKS-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM809TAKS-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM809TAKS-REEL7?
ADM809TAKS-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM809TAKS-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 ADM809TAKS-REEL7?
For technical support, including ADM809TAKS-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM809TAKS-REEL7 requirements.
6.How does Aetrix verify that ADM809TAKS-REEL7 is sourced from the original manufacturer or authorized distributors?
All ADM809TAKS-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 ADM809TAKS-REEL7 meets industry standards.
7.What is the process for return or replacement of ADM809TAKS-REEL7?
All ADM809TAKS-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM809TAKS-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 ADM809TAKS-REEL7 part is unused and in its original packaging.
Return procedure for ADM809TAKS-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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