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Analog Devices Inc. ADM809RAKSZ-REEL
- Part No.:
- ADM809RAKSZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
ADM809RAKSZ-REEL.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,931
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Product details
Overview
ADM809RAKSZ-REEL from Analog Devices is a microprocessor supervisory circuit with push-pull active-low RESET output, 2.63 V reset threshold (±0.04 V over −40°C to +125°C), 140–460 ms power-on reset timeout, and 17 μA supply current at VCC < 3.6 V. It monitors VCC down to 1.0 V and operates in SC70-3 package for space-constrained embedded control systems.
For engineers reviewing the ADM809RAKSZ-REEL datasheet, ADM809RAKSZ-REEL pinout, ADM809RAKSZ-REEL application, or ADM809RAKSZ-REEL equivalent, key selection criteria include guaranteed reset assertion below 1 V VCC, temperature-stable 2.63 V threshold across automotive-grade temperature range, push-pull drive capability without external pull-up, and RoHS-compliant SC70 packaging for high-density PCB layouts.
Technical Context
The ADM809RAKSZ-REEL implements a precision bandgap-based voltage comparator with built-in glitch immunity to reject fast transients on VCC up to 100 mV overdrive. Its internal 240 ms (typical) reset timer ensures stable microprocessor initialization after power-up or brownout recovery.
It features a push-pull RESET output capable of sinking 1.2 mA at VCC = VTH min (0.3 V max VOL) and sourcing 500 μA at VCC > VTH max (0.8 × VCC min VOH), eliminating need for external pull-up resistors used in open-drain variants like ADM803.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.63 V (typ), ±0.04 V over −40°C to +125°C - ensures reliable detection of 2.7 V nominal supply droop before system instability. |
| Supply Current | 17 μA (typ) at VCC < 3.6 V - enables integration into battery-powered or ultra-low-power embedded controllers. |
| VCC Operating Range | 1.0 V to 5.5 V - supports valid reset assertion even during deep brownout conditions down to 1 V. |
| Reset Timeout | 140–460 ms (−40°C to +85°C), 100–840 ms (+85°C to +125°C) - provides sufficient hold time for slow-ramping or noisy power rails. |
| Output Type | Push-pull active-low RESET - drives logic inputs directly without external components, simplifying interface to ARM Cortex-M or PIC microcontrollers. |
| Package | 3-lead SC70 (KS-3), 2.00 mm × 2.10 mm footprint - enables high-density placement in portable instrumentation and industrial sensor nodes. |
| Temperature Range | −40°C to +125°C - qualified for under-hood automotive, motor control, and industrial PLC applications. |
Pinout & Package
ADM809RAKSZ-REEL uses a 3-lead SC70 (KS-3) package with exposed pad not connected internally. Pin 1 is GND, Pin 2 is RESET (active-low push-pull), and Pin 3 is VCC - compatible with standard SMT reflow profiles per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Ground reference | 0 V return path for internal comparator and output stage; must be low-impedance connection to system ground plane. |
| RESET (Pin 2) | Active-low reset signal | Drives low during VCC < 2.63 V and remains low for ≥140 ms after VCC rises above threshold; sinks 1.2 mA minimum. |
| VCC (Pin 3) | Monitored supply input | Connects directly to the voltage rail being supervised (e.g., 2.7 V LDO output); powers internal circuitry and defines reset logic levels. |
Key Features
| Feature | Design Value |
|---|---|
| Precision reset threshold | 2.63 V with ±0.04 V tolerance over full temperature range - eliminates need for external trimming in 2.7 V system monitoring. |
| Ultra-low quiescent current | 17 μA typical - extends battery life in always-on IoT edge nodes and portable medical devices. |
| Brownout detection down to 1 V | Valid RESET assertion maintained until VCC falls below 1.0 V - prevents premature release during severe supply sag. |
| Glitch-immune comparator | Rejects transients ≤100 mV overdrive lasting ≤400 μs - avoids false resets from switching noise or ESD coupling. |
| RoHS-compliant SC70 package | Lead-free, halogen-free KS-3 outline (2.00 × 2.10 mm) - meets IPC-7351B land pattern standards for automated assembly. |
Applications
| Industrial Motor Control | Automotive Body Controller |
|---|---|
Use Scenario: Monitors 2.7 V auxiliary supply feeding MCU and CAN transceiver in electric power steering module. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low RESET until 2.7 V rail stabilizes post-ignition, holding MCU in reset for ≥240 ms. Use Value: Prevents firmware execution during undervoltage transients caused by load dump or alternator ripple. |
Use Scenario: Watches 3.3 V domain powering door lock actuator MCU and LIN transceiver in body control unit. IC Role / Device Role / Timing Role: Generates clean, glitch-free reset pulse synchronized to 2.63 V threshold crossing, independent of VCC slew rate. Use Value: Eliminates spurious wakeups during battery voltage sag during cold cranking (down to 6 V). |
| Portable Medical Monitor | Smart Energy Meter |
Use Scenario: Supervises 2.8 V lithium coin-cell backup supply for real-time clock and SRAM retention during main power loss. IC Role / Device Role / Timing Role: Asserts RESET when VCC drops below 2.63 V, triggering controlled shutdown sequence before data corruption occurs. Use Value: Guarantees ≥140 ms warning window for EEPROM save operations prior to brownout-induced data loss. |
Use Scenario: Monitors isolated 2.7 V DC-DC output powering metrology ADC and isolation barrier in DIN-rail meter. IC Role / Device Role / Timing Role: Provides fail-safe reset with 125°C operation rating to withstand transformer-heated enclosure environments. Use Value: Ensures deterministic MCU restart after transient overvoltage events on AC mains input. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809RTRG+T | 2.63 V threshold, SOT-23-3 package, 1.2 μA max supply current at 2.0 V, but only rated to +85°C. | Limited to commercial/industrial ambient; unsuitable for under-hood or high-temperature industrial enclosures. | Select when cost sensitivity outweighs extended temperature requirement and board space allows larger SOT-23 footprint. |
| TPS3808G12DBVR | 1.225 V fixed threshold (not 2.63 V), adjustable via external resistor, 1.8 μA typical IQ, −40°C to +125°C. | Requires external resistor network for 2.63 V setting; adds BOM count and layout complexity versus factory-trimmed ADM809RAKSZ-REEL. | Choose only if programmability justifies added design effort and calibration overhead in production test. |
Compared with MAX809RTRG+T and TPS3808G12DBVR, ADM809RAKSZ-REEL delivers factory-trimmed 2.63 V accuracy across −40°C to +125°C in the smallest SC70 footprint, with push-pull drive eliminating external components - making it optimal for space- and reliability-critical automotive and industrial designs where qualification rigor and zero-compromise supervision are required.
Availability
ADM809RAKSZ-REEL is available at Aetrix Electronics and suitable for industrial motor control, automotive body electronics, and portable medical instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ADM809RAKSZ-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, designed specifically for robust, low-power reset generation in automotive, industrial, and medical systems where supply voltage integrity is mission-critical.
FAQ
What is the exact reset threshold voltage of ADM809RAKSZ-REEL and how does it vary with temperature?
The ADM809RAKSZ-REEL has a nominal reset threshold of 2.63 V at 25°C, with guaranteed range of 2.55 V to 2.70 V over −40°C to +85°C and 2.52 V to 2.74 V over −40°C to +125°C. This tight tolerance ensures consistent brownout detection across automotive and industrial operating conditions without external calibration. The device's 30 ppm/°C temperature coefficient minimizes drift during thermal cycling.
Does ADM809RAKSZ-REEL require an external pull-up resistor on the RESET pin?
No, ADM809RAKSZ-REEL does not require an external pull-up resistor because it features a push-pull RESET output. Unlike the open-drain ADM803 variant, the ADM809RAKSZ-REEL actively drives both high and low states - sourcing up to 500 μA and sinking up to 1.2 mA - enabling direct connection to CMOS inputs without additional components.
Can ADM809RAKSZ-REEL operate reliably when VCC drops below 2.0 V?
Yes, ADM809RAKSZ-REEL maintains valid RESET assertion down to VCC = 1.0 V, as confirmed in its Absolute Maximum Ratings and General Description. The internal circuitry remains functional and the RESET output stays low until VCC falls below 1.0 V, providing critical fail-safe behavior during deep brownout events common in battery-backed systems.
What is the package type and dimensions of ADM809RAKSZ-REEL?
ADM809RAKSZ-REEL uses a 3-lead SC70 package (JEDEC KS-3 outline), measuring 2.00 mm × 2.10 mm × 0.90 mm with 0.65 mm lead pitch. Its compact size and RoHS-compliant construction meet IPC-7351B standards for high-density PCB assembly in space-constrained applications such as handheld diagnostics and smart sensors.
How does the reset timeout period of ADM809RAKSZ-REEL behave across temperature?
The ADM809RAKSZ-REEL guarantees a minimum reset timeout of 140 ms at −40°C to +85°C and 100 ms at +85°C to +125°C, with typical value of 240 ms at 25°C. This monotonic decrease with rising temperature ensures conservative timing margins in high-ambient environments while avoiding excessive delays during cold startup.
ADM809RAKSZ-REEL 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:
- 2.63V
- 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
ADM809RAKSZ-REEL FAQ
1.How can I place an order for ADM809RAKSZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM809RAKSZ-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 ADM809RAKSZ-REEL reliable?
The price and inventory of ADM809RAKSZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM809RAKSZ-REEL is usually 5 days.
3.What payment methods are accepted for ADM809RAKSZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM809RAKSZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM809RAKSZ-REEL?
ADM809RAKSZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM809RAKSZ-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 ADM809RAKSZ-REEL?
For technical support, including ADM809RAKSZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM809RAKSZ-REEL requirements.
6.How does Aetrix verify that ADM809RAKSZ-REEL is sourced from the original manufacturer or authorized distributors?
All ADM809RAKSZ-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 ADM809RAKSZ-REEL meets industry standards.
7.What is the process for return or replacement of ADM809RAKSZ-REEL?
All ADM809RAKSZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with ADM809RAKSZ-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 ADM809RAKSZ-REEL part is unused and in its original packaging.
Return procedure for ADM809RAKSZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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