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Analog Devices Inc. ADM809SAKS-REEL
- Part No.:
- ADM809SAKS-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
ADM809SAKS-REEL.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,739
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Product details
Overview
ADM809SAKS-REEL from Analog Devices is a microprocessor supervisory circuit with push-pull active-low RESET output, 2.93 V reset threshold, and guaranteed operation down to 1.0 V VCC. It delivers 240 ms minimum power-on reset timeout, 17 μA supply current at 3.6 V, and operates across −40°C to +125°C for industrial and automotive microcontroller power monitoring.
For engineers reviewing the ADM809SAKS-REEL datasheet, ADM809SAKS-REEL pinout, ADM809SAKS-REEL application, or ADM809SAKS-REEL equivalent, this device supports reliable power-up sequencing in embedded controllers, portable instrumentation, and low-voltage microprocessor systems where precise brownout detection and minimal quiescent current are critical.
Technical Context
The ADM809SAKS-REEL integrates a precision voltage comparator with built-in glitch immunity and an internal 240 ms reset timer. Its reset assertion remains valid even as VCC drops to 1.0 V, enabling robust brownout recovery in unstable supply environments.
It uses a bandgap reference to maintain ±1.5% reset threshold accuracy over temperature (−40°C to +125°C) and features push-pull output capable of sinking 1.2 mA at 0.3 V and sourcing 500 μA at 0.8 × VCC - eliminating need for external pull-up resistors unlike open-drain variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93 V nominal; ensures reliable reset assertion before 3.3 V system rails fall below safe operating margin. |
| Reset Timeout | 240 ms typical; holds microprocessor in reset long enough for clock stabilization and memory initialization. |
| Supply Current | 17 μA at VCC < 3.6 V; enables integration into battery-powered or energy-constrained embedded designs. |
| VCC Operating Range | 1.0 V to 5.5 V; supports operation during deep brownout and allows use with wide-input DC/DC converters. |
| Output Type | Push-pull active-low RESET; drives logic inputs directly without external components, reducing BOM count. |
| Temperature Range | −40°C to +125°C; qualified for under-hood automotive, industrial PLC, and high-reliability edge sensor applications. |
| Reset Accuracy | ±1.5% over full temperature range; minimizes false resets and improves system uptime in thermally varying environments. |
Pinout & Package
ADM809SAKS-REEL is housed in a 3-lead SC70 (KS-3) package - compact, surface-mount, JEDEC-compliant, with 0.65 mm lead pitch and coplanarity ≤0.10 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal comparator and reset generator; must be connected to system ground plane for noise immunity. |
| 2 | RESET | Active-low push-pull output; asserts low during power-up/brownout and releases high after 240 ms timeout. |
| 3 | VCC | Monitored supply input; powers internal circuitry and serves as reference for reset threshold detection. |
Key Features
| Feature | Design Value |
|---|---|
| Precision reset threshold | 2.93 V ±1.5% over −40°C to +125°C - eliminates need for external trimming in 3.3 V rail monitoring. |
| Ultra-low quiescent current | 17 μA at 3.6 V - extends battery life in portable controllers and IoT endpoint nodes. |
| Brownout detection down to 1 V | Ensures reset remains asserted until VCC recovers above functional minimum, preventing erratic MCU behavior. |
| Glitch-immune comparator | Rejects fast transients up to 100 mV overdrive - avoids spurious resets during switching noise or load dumps. |
| No external components required | Push-pull output eliminates pull-up resistor; reduces PCB area and assembly cost vs. open-drain alternatives. |
Applications
| Industrial PLC Controller | Automotive Body Control Module |
|---|---|
|
Use Scenario: Monitors 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 circuit providing deterministic power-on reset and brownout protection for ARM Cortex-M4-based control core. Use Value: 240 ms timeout ensures firmware boot completes before peripheral initialization; 125°C rating guarantees reliability in uncooled enclosures. |
Use Scenario: Embedded in door module ECUs to supervise 3.3 V domain powering CAN transceivers and window motor drivers. IC Role / Device Role / Timing Role: Reset generator asserting low during cold-cranking voltage sag (<2.5 V) and releasing only after stable 3.3 V rail is restored. Use Value: 2.93 V threshold aligns precisely with 3.3 V LDO dropout margin; push-pull output interfaces directly with MCU's dedicated reset pin. |
| Portable Medical Instrument | Smart Energy Meter |
|
Use Scenario: Powers handheld blood glucose meters using single-cell Li-ion (2.7–4.2 V); requires fail-safe reset during battery depletion. IC Role / Device Role / Timing Role: Voltage monitor ensuring MCU remains held in reset until battery voltage exceeds 2.93 V post-charge or wake-up. Use Value: 17 μA supply current maximizes standby time; 1.0 V VCC operation prevents premature release during deep discharge. |
Use Scenario: Supervises 3.3 V supply feeding metrology ADC and RF sub-GHz transceiver in DIN-rail mounted electricity meters. IC Role / Device Role / Timing Role: Brownout detector triggering controlled shutdown when AC line sags cause 3.3 V rail collapse. Use Value: Glitch immunity prevents false resets from switching regulator ripple; SC70 footprint saves space on dense meter PCBs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809SASED+ | 2.93 V threshold, SOT-23-3, 1.2 μA max supply current at 3.3 V; no 125°C rating - only rated to +85°C. | Limited to commercial/industrial ambient; unsuitable for under-hood or extended-temperature industrial deployments. | Select when cost sensitivity outweighs extended temperature requirement and board space permits SOT-23. |
| TPS3808G33DBVR | 3.3 V threshold (not 2.93 V), 1.8 μA typical IQ, adjustable delay option; requires external capacitor for timeout tuning. | Higher threshold risks late reset release on 3.3 V rails with tight LDO tolerance; added component increases BOM and layout complexity. | Choose only if system design tolerates 3.3 V trip point and benefits from programmable timeout via capacitor. |
Compared with MAX809SASED+ and TPS3808G33DBVR, the ADM809SAKS-REEL provides tighter thermal qualification (−40°C to +125°C), exact 2.93 V threshold alignment with 3.3 V rail margins, and zero-external-component operation - making it optimal for high-reliability, space-constrained, and thermally demanding applications.
Availability
ADM809SAKS-REEL is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body electronics, portable medical instruments, and smart energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ADM809SAKS-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 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 ADM809SAKS-REEL belongs to the ADM803/ADM809/ADM810 family of microprocessor supervisory circuits, engineered specifically for robust power monitoring in harsh environments where precision, low power, and wide temperature operation are mandatory.
FAQ
What is the reset threshold voltage of the ADM809SAKS-REEL?
The ADM809SAKS-REEL has a nominal reset threshold voltage of 2.93 V, with guaranteed accuracy of ±1.5% over its full operating temperature range of −40°C to +125°C. This value is confirmed in Table 3 and Specifications section of the ADM803/ADM809/ADM810 datasheet Rev. I, and matches the "S" variant designation per the Ordering Guide.
Does the ADM809SAKS-REEL require an external pull-up resistor on the RESET pin?
No, the ADM809SAKS-REEL features a push-pull RESET output, so it does not require an external pull-up resistor. Unlike the open-drain ADM803 series, this device actively drives both high and low states - simplifying interface design and reducing component count in systems using the ADM809SAKS-REEL.
What package type is used for the ADM809SAKS-REEL?
The ADM809SAKS-REEL is supplied in a 3-lead SC70 package (JEDEC KS-3), measuring 2.00 mm × 2.10 mm × 0.90 mm with 0.65 mm lead pitch. This is explicitly stated in the Ordering Guide and Outline Dimensions section (Figure 15) of the ADM803/ADM809/ADM810 datasheet.
Can the ADM809SAKS-REEL operate when VCC drops below 2.0 V?
Yes, the ADM809SAKS-REEL remains fully functional down to VCC = 1.0 V, maintaining accurate reset assertion and timing integrity. This capability is specified in the "VCC Operating Voltage Range" table (Page 3) and enables reliable brownout handling in systems with collapsing supplies - a key differentiator of the ADM809SAKS-REEL.
What is the typical power-on reset timeout duration for the ADM809SAKS-REEL?
The ADM809SAKS-REEL provides a typical power-on reset timeout of 240 ms, with a minimum of 140 ms and maximum of 460 ms over −40°C to +85°C. This fixed internal timer ensures consistent MCU initialization timing regardless of supply ramp rate - a confirmed parameter in the "RESET ACTIVE TIMEOUT PERIOD" row of the datasheet specifications table.
ADM809SAKS-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:
- 2.93V
- 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
ADM809SAKS-REEL FAQ
1.How can I place an order for ADM809SAKS-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM809SAKS-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 ADM809SAKS-REEL reliable?
The price and inventory of ADM809SAKS-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM809SAKS-REEL is usually 5 days.
3.What payment methods are accepted for ADM809SAKS-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM809SAKS-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM809SAKS-REEL?
ADM809SAKS-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM809SAKS-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 ADM809SAKS-REEL?
For technical support, including ADM809SAKS-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM809SAKS-REEL requirements.
6.How does Aetrix verify that ADM809SAKS-REEL is sourced from the original manufacturer or authorized distributors?
All ADM809SAKS-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 ADM809SAKS-REEL meets industry standards.
7.What is the process for return or replacement of ADM809SAKS-REEL?
All ADM809SAKS-REEL units undergo pre-shipment inspection (PSI). If there is an issue with ADM809SAKS-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 ADM809SAKS-REEL part is unused and in its original packaging.
Return procedure for ADM809SAKS-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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