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Analog Devices Inc. ADM809MAKS-REEL
- Part No.:
- ADM809MAKS-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
ADM809MAKS-REEL.pdf
- Description:
- IC SUPERVSR PUSH/PULL 4.38V SC70
- Quantity:
- Payment:
- Shipping:
Inventory:20,000
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Product details
Overview
ADM809MAKS-REEL from Analog Devices is a microprocessor supervisory circuit with push-pull active-low RESET output, 4.38 V reset threshold, −40°C to +125°C operating temperature range, 17 μA supply current, and 240 ms typical power-on reset timeout. It monitors VCC in embedded microcontroller systems where reliable brownout detection and stable reset assertion down to 1 V are required.
For engineers reviewing the ADM809MAKS-REEL datasheet, ADM809MAKS-REEL pinout, ADM809MAKS-REEL application, or ADM809MAKS-REEL equivalent, key selection considerations include reset threshold accuracy (±2.5% over temperature), push-pull drive capability (3.2 mA sink at VTH min), SC70-3 package footprint, and compatibility with 3 V/5 V logic interfaces without external pull-up.
Technical Context
The ADM809MAKS-REEL integrates a precision voltage comparator with built-in glitch immunity and an internal 240 ms reset timer. Its reference circuit maintains stability across −40°C to +125°C, enabling robust operation during rapid VCC transients and brownout events.
It features a push-pull RESET output that actively drives low during fault conditions and high during normal operation-eliminating need for external pull-up resistors. The device asserts reset down to VCC = 1.0 V and remains functional through full VCC operating range (1.2 V to 5.5 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.38 V (typical at 25°C); ±2.5% tolerance over −40°C to +125°C ensures accurate detection of 4.5 V nominal supply droop |
| Supply Current | 17 μA (typical at VCC < 3.6 V, −40°C to +85°C); enables battery-backed or ultra-low-power system monitoring |
| Reset Timeout | 240 ms (typical power-on delay); holds microprocessor in reset until supply stabilizes post-power-up |
| VCC Operating Range | 1.2 V to 5.5 V (−40°C to +125°C); supports wide input voltage monitoring including 3.3 V and 5 V rails |
| RESET Output Type | Push-pull active-low; sinks 3.2 mA at VTH min (VCC = 4.38 V), eliminating external pull-up resistor requirement |
| Reset Assertion Voltage | Operates down to VCC = 1.0 V; guarantees valid reset signal even during deep brownout or partial power loss |
| Temperature Coefficient | 30 ppm/°C; minimizes threshold drift across industrial temperature range for consistent trip point behavior |
Pinout & Package
ADM809MAKS-REEL is housed in a 3-lead SC70 (KS-3) package - compact (2.00 mm × 2.10 mm × 0.9 mm), surface-mount, RoHS-compliant, with 0.65 mm lead pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal comparator and timer; must be connected directly to system ground plane for noise immunity |
| 2 | RESET | Active-low push-pull output; drives low during reset (VCC < 4.38 V) and high otherwise; compatible with CMOS/TTL inputs |
| 3 | VCC | Monitored supply input; powers internal circuitry and serves as reference for reset threshold detection |
Key Features
| Feature | Design Value |
|---|---|
| Precision reset threshold | 4.38 V with ±2.5% max deviation over −40°C to +125°C - eliminates need for external trimming in industrial control designs |
| Ultra-low quiescent current | 17 μA typical - extends battery life in portable instrumentation and remote sensor nodes |
| Glitch-immune comparator | Rejects fast VCC transients up to 100 mV overdrive for ≤100 µs - prevents spurious resets in noisy power environments |
| Wide VCC operating range | 1.2 V to 5.5 V - supports single-supply monitoring across 3.3 V, 5 V, and mixed-voltage microcontroller platforms |
| Push-pull RESET output | No external pull-up required; delivers 3.2 mA sink drive at VTH min - simplifies PCB layout and reduces BOM count |
Applications
| Industrial PLC Controller | Medical Diagnostic Handheld |
|---|---|
Use Scenario: Monitors 3.3 V logic rail in programmable logic controller I/O modules subject to field-induced voltage sags and EMI. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low RESET to ARM Cortex-M7 MCU during brownout, with 240 ms timeout ensuring firmware initialization completes before execution. Use Value: Prevents corrupted register writes and undefined state entry by guaranteeing reset remains asserted until VCC stabilizes above 4.38 V ± tolerance. |
Use Scenario: Embedded in portable ultrasound probe with lithium coin-cell backup, requiring fail-safe reset during battery swap or low-VCC transitions. IC Role / Device Role / Timing Role: Resets microcontroller on main 3.3 V supply drop below 4.38 V threshold; operates down to 1.0 V VCC to capture final brownout edge. Use Value: Enables deterministic shutdown and data preservation via early reset assertion before critical memory corruption occurs. |
| Automotive Body Control Module | Smart Energy Meter |
Use Scenario: Integrated into 12 V–5 V DC/DC-powered BCM managing door locks, lighting, and CAN interface. IC Role / Device Role / Timing Role: Monitors 5 V rail feeding microcontroller and analog front-end; push-pull RESET directly interfaces with MCU's dedicated reset pin. Use Value: Eliminates pull-up resistor and associated parasitic leakage - critical for meeting automotive quiescent current targets (<100 μA). |
Use Scenario: Used in Class 0.5S electricity meter with isolated power supply and real-time clock backup. IC Role / Device Role / Timing Role: Detects failure of primary 3.3 V supply and triggers controlled switchover to supercapacitor-backed RTC domain. Use Value: 30 ppm/°C threshold drift ensures consistent reset timing across −25°C to +70°C meter operating range, preventing false trips during thermal cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809SEUR+T | 4.63 V reset threshold, SOT-23-3 package, 20 μA supply current, 140 ms min reset timeout | Higher threshold suits 5 V systems; shorter minimum timeout may require external timing extension for slower processors | Select when 5 V rail monitoring and SOT-23 footprint compatibility are prioritized over ultra-low current or extended temperature range |
| TPS3808G12QDBVRQ1 | 1.2 V adjustable threshold (via external resistor), 1.5 μA quiescent current, AEC-Q100 qualified, 200 ms fixed timeout | Requires external resistor network; optimized for automotive but lacks factory-trimmed 4.38 V option | Choose for automotive-grade qualification and lowest power, accepting design overhead of external components and calibration |
Compared with MAX809SEUR+T and TPS3808G12QDBVRQ1, ADM809MAKS-REEL provides factory-trimmed 4.38 V threshold with tighter temperature stability and lower supply current than MAX809, while offering plug-and-play simplicity versus the adjustable TPS3808's configuration requirements.
Availability
ADM809MAKS-REEL is available at Aetrix Electronics and suitable for industrial PLC controllers, medical handheld diagnostics, automotive body control modules, and smart energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ADM809MAKS-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, serving industrial, automotive, communications, and healthcare markets.
The ADM809 series belongs to Analog Devices' microprocessor supervisory product line, designed specifically for reliable power-on reset, brownout protection, and supply voltage monitoring in harsh-environment embedded systems.
FAQ
What is the exact reset threshold voltage of ADM809MAKS-REEL and how does it vary with temperature?
The ADM809MAKS-REEL has a nominal reset threshold of 4.38 V at 25°C. Over the full −40°C to +125°C operating range, the threshold varies from 4.20 V to 4.56 V (±2.5% max deviation), as specified in Table 1 of the datasheet. This tight tolerance ensures consistent detection of 4.5 V supply droop across industrial and automotive environments without external calibration.
Does ADM809MAKS-REEL require an external pull-up resistor on the RESET pin?
No, ADM809MAKS-REEL does not require an external pull-up resistor. It features a push-pull RESET output capable of actively driving high (up to 0.8×VCC) and low (≤0.4 V at 3.2 mA sink), unlike open-drain variants such as ADM803. This simplifies PCB layout and eliminates a common BOM item in microcontroller reset circuits.
What package type and dimensions does ADM809MAKS-REEL use?
ADM809MAKS-REEL uses the 3-lead SC70 (KS-3) package: 2.00 mm × 2.10 mm × 0.9 mm body size with 0.65 mm lead pitch. Per JEDEC standard KS-3, it is RoHS-compliant and optimized for high-density PCB assembly in space-constrained applications like portable medical devices and smart sensors.
Can ADM809MAKS-REEL operate reliably below 2.0 V VCC?
Yes, ADM809MAKS-REEL remains fully functional down to VCC = 1.0 V, as confirmed in the Absolute Maximum Ratings and General Description sections. Its reset output stays valid and asserted until VCC rises above the 4.38 V threshold, making it suitable for detecting deep brownout conditions in battery-powered systems before complete power collapse.
How does the 240 ms reset timeout of ADM809MAKS-REEL behave across temperature?
The ADM809MAKS-REEL's reset timeout is 240 ms typical at 25°C, with variation bounded between 140 ms and 460 ms over −40°C to +85°C (Table 1). At higher temperatures (85°C to 125°C), the range widens to 100 ms to 840 ms. This guaranteed minimum ensures safe microprocessor initialization regardless of ambient conditions.
ADM809MAKS-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- -
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
ADM809MAKS-REEL FAQ
1.How can I place an order for ADM809MAKS-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM809MAKS-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 ADM809MAKS-REEL reliable?
The price and inventory of ADM809MAKS-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM809MAKS-REEL is usually 5 days.
3.What payment methods are accepted for ADM809MAKS-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM809MAKS-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM809MAKS-REEL?
ADM809MAKS-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM809MAKS-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 ADM809MAKS-REEL?
For technical support, including ADM809MAKS-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM809MAKS-REEL requirements.
6.How does Aetrix verify that ADM809MAKS-REEL is sourced from the original manufacturer or authorized distributors?
All ADM809MAKS-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 ADM809MAKS-REEL meets industry standards.
7.What is the process for return or replacement of ADM809MAKS-REEL?
All ADM809MAKS-REEL units undergo pre-shipment inspection (PSI). If there is an issue with ADM809MAKS-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 ADM809MAKS-REEL part is unused and in its original packaging.
Return procedure for ADM809MAKS-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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