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Analog Devices Inc. ADM809TAKS-REEL
- Part No.:
- ADM809TAKS-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
ADM809TAKS-REEL.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,328
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Product details
Overview
ADM809TAKS-REEL from Analog Devices is a 3-pin microprocessor supervisory circuit with push-pull active-low RESET output, 3.08 V reset threshold, and guaranteed operation down to 1.0 V VCC. It provides 240 ms minimum power-on reset timeout, consumes only 17 μA typical supply current, and is qualified for −40°C to +125°C industrial/automotive environments. It monitors 3.3 V supply rails in embedded controllers and intelligent instruments.
For engineers reviewing the ADM809TAKS-REEL datasheet, ADM809TAKS-REEL pinout, ADM809TAKS-REEL application, or ADM809TAKS-REEL equivalent, key selection criteria include reset threshold accuracy (±2.5% over temperature), push-pull drive capability (3.2 mA sink at VTH min), SC70 package footprint, and brownout detection below 1 V VCC.
Technical Context
The ADM809TAKS-REEL integrates a precision voltage comparator with built-in glitch immunity and an internal 240 ms reset timer. Its reference circuit maintains stable threshold performance across −40°C to +125°C, with 30 ppm/°C temperature coefficient.
It operates as a standalone reset generator: VCC monitoring triggers active-low RESET assertion during power-up, brownout, or power-down; RESET remains asserted for ≥140 ms after VCC rises above 3.08 V, with typical timeout of 240 ms and maximum of 460 ms over full temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08 V nominal, ±2.5% over −40°C to +125°C - ensures reliable reset assertion for 3.3 V systems under worst-case voltage droop. |
| Supply Current | 17 μA typical at VCC < 3.6 V - enables use in battery-powered portable equipment without significant quiescent drain. |
| Reset Timeout | 240 ms typical, 140–460 ms min–max over temperature - guarantees sufficient hold time for microprocessor initialization. |
| VCC Operating Range | 1.0 V to 5.5 V - supports valid reset assertion even during deep brownout conditions before system collapse. |
| Output Type | Push-pull active-low RESET - eliminates need for external pull-up resistor and drives CMOS/TTL inputs directly. |
| Reset Output Low | 0.4 V max at 3.2 mA sink (VCC = VTH min) - ensures solid logic low compatible with 3.3 V I/O standards. |
| Reset Output High | 0.8 × VCC min at 500 μA source - guarantees robust high-level drive margin for noise-immune reset release. |
Pinout & Package
ADM809TAKS-REEL is housed in a 3-lead SC70 (KS-3) package, measuring 2.00 mm × 1.25 mm × 0.9 mm with 0.65 mm lead pitch. The package is RoHS-compliant and optimized for high-density PCB layouts.
| 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 - asserts low during power-up/brownout; releases high after timeout; sinks up to 3.2 mA. |
| 3 | VCC | Monitored supply input - powers internal circuitry and serves as reference for reset threshold detection. |
Key Features
| Feature | Design Value |
|---|---|
| Precision reset threshold | 3.08 V with ±2.5% tolerance over −40°C to +125°C - eliminates need for external trimming in 3.3 V rail monitoring. |
| Ultra-low quiescent current | 17 μA typical - extends battery life in always-on sensor nodes and portable instrumentation. |
| Brownout detection | Valid RESET assertion down to 1.0 V VCC - prevents erratic microprocessor behavior during severe undervoltage events. |
| Glitch-immune comparator | Immunity to transients ≤100 μs at 100 mV overdrive - avoids false resets from switching noise on VCC rail. |
| Wide temperature qualification | −40°C to +125°C operation - suitable for under-hood automotive, industrial PLC, and outdoor embedded applications. |
Applications
| Industrial PLC Controllers | Automotive Body Control Modules |
|---|---|
Use Scenario: Monitoring 3.3 V microcontroller supply in programmable logic controller cabinets exposed to wide ambient temperature swings and EMI-rich factory environments. IC Role / Device Role / Timing Role: Supervisory IC providing power-on reset, brownout protection, and deterministic reset release timing for ARM Cortex-M based main controller. Use Value: Ensures deterministic boot sequence and prevents lockup during voltage sags caused by motor contactor switching or shared power rail transients. | Use Scenario: Reset supervision for infotainment MCU in vehicle door modules operating near HVAC actuators and window lift motors. IC Role / Device Role / Timing Role: Dedicated reset generator asserting active-low signal during cold-cranking (battery dip to 6 V) and hot-soak (125°C junction). Use Value: Guarantees clean MCU restart after engine start-up voltage dip, eliminating firmware hang due to marginal VCC during cranking. |
| Medical Patient Monitor Sensors | Smart Energy Metering Units |
Use Scenario: Power integrity monitoring for low-power ECG front-end SoC in portable diagnostic devices powered by coin-cell or rechargeable Li-ion batteries. IC Role / Device Role / Timing Role: Voltage supervisor enabling safe shutdown and wake-up sequencing when 3.3 V LDO output drops below 3.08 V during battery depletion. Use Value: Prevents data corruption in flash memory writes and ADC sampling during brownout, preserving clinical measurement integrity. | Use Scenario: Reset management for metrology SoC in DIN-rail mounted electricity meters subjected to utility grid surges and long-term thermal cycling. IC Role / Device Role / Timing Role: Primary reset source ensuring reliable boot after power restoration following grid outage or lightning-induced dropout. Use Value: Eliminates need for external RC reset circuits, improving long-term reliability and reducing BOM count in Class 0.2 accuracy meter designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TTR | 3.08 V threshold, SOT-23-3 package, 1.2 mA RESET sink, 140 ms min timeout | Limited to −40°C to +85°C operation; lacks 125°C qualification | Select for cost-sensitive consumer applications where extended temperature range is not required. |
| TPS3808G30DBVR | 3.0 V threshold (±0.5%), 350 ms timeout, 1.8–6.0 V VCC range, enable input | Higher accuracy but fixed 350 ms timeout; requires external enable control for flexible reset initiation | Choose when tighter threshold tolerance (±0.5%) and wider VCC range outweigh need for minimal timeout flexibility. |
Compared with MAX809TTR and TPS3808G30DBVR, the ADM809TAKS-REEL delivers superior high-temperature reliability (125°C), lower quiescent current (17 μA vs. 20–25 μA), and tighter reset timing consistency across temperature - critical for automotive and industrial deployments where thermal margin is constrained.
Availability
ADM809TAKS-REEL is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, medical patient monitor sensors, and smart energy metering units requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ADM809TAKS-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 series belongs to Analog Devices' microprocessor supervisory product line, engineered specifically for deterministic power-on reset, brownout protection, and low-voltage operation in harsh industrial and automotive environments.
FAQ
What is the exact reset threshold voltage of the ADM809TAKS-REEL and how does it vary with temperature?
The ADM809TAKS-REEL has a nominal reset threshold of 3.08 V at 25°C, with a guaranteed range 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, resulting in ≤±12 mV drift across the full industrial range - sufficient for stable 3.3 V rail supervision without external calibration.
Does the ADM809TAKS-REEL require an external pull-up resistor on the RESET pin?
No, the ADM809TAKS-REEL features a push-pull RESET output and does not require an external pull-up resistor. Unlike the open-drain ADM803 variant, this device actively drives both high and low states, delivering 0.8 × VCC minimum high-level voltage and 0.4 V maximum low-level voltage at rated load - fully compatible with standard CMOS inputs.
What is the minimum VCC voltage at which the ADM809TAKS-REEL continues to assert a valid RESET signal?
The ADM809TAKS-REEL maintains valid RESET assertion down to 1.0 V VCC, as specified in its absolute operating range. Below 1.0 V, the internal circuitry may cease functioning, but within the 1.0–5.5 V range, RESET remains asserted while VCC is below 3.08 V and transitions cleanly after timeout - enabling robust brownout recovery in low-voltage systems.
How does the ADM809TAKS-REEL handle fast transients on the VCC line?
The ADM809TAKS-REEL incorporates a glitch-immune reset comparator that rejects transients ≤100 μs duration when overdrive is ≥100 mV (i.e., VTH − VCC ≥ 100 mV). This design prevents false resets caused by switching noise from DC-DC converters or motor drivers, as confirmed in Figure 11 of the datasheet.
Is the ADM809TAKS-REEL pin-compatible with other members of the ADM803/ADM809/ADM810 family?
No - the ADM809TAKS-REEL shares the same 3-pin SC70 pinout (GND, RESET, VCC) with ADM809 variants but differs from ADM803 (open-drain, requires pull-up) and ADM810 (active-high RESET). Pin compatibility exists only within the ADM809 subfamily; mixing with ADM803 or ADM810 requires schematic and firmware changes due to output polarity and drive architecture differences.
ADM809TAKS-REEL 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-REEL FAQ
1.How can I place an order for ADM809TAKS-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM809TAKS-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 ADM809TAKS-REEL reliable?
The price and inventory of ADM809TAKS-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM809TAKS-REEL is usually 5 days.
3.What payment methods are accepted for ADM809TAKS-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM809TAKS-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM809TAKS-REEL?
ADM809TAKS-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM809TAKS-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 ADM809TAKS-REEL?
For technical support, including ADM809TAKS-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM809TAKS-REEL requirements.
6.How does Aetrix verify that ADM809TAKS-REEL is sourced from the original manufacturer or authorized distributors?
All ADM809TAKS-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 ADM809TAKS-REEL meets industry standards.
7.What is the process for return or replacement of ADM809TAKS-REEL?
All ADM809TAKS-REEL units undergo pre-shipment inspection (PSI). If there is an issue with ADM809TAKS-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 ADM809TAKS-REEL part is unused and in its original packaging.
Return procedure for ADM809TAKS-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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