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Analog Devices Inc. ADM809MAKSZ-REEL7
- Part No.:
- ADM809MAKSZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- SC-70, SOT-323
- Datasheet:
-
ADM809MAKSZ-REEL7.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,371
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Product details
Overview
ADM809MAKSZ-REEL7 from Analog Devices is a 3-pin SOT-23 microprocessor supervisory circuit with push-pull active-low RESET output, 4.38 V reset threshold, −40°C to +125°C operating range, and 17 μA supply current. It monitors VCC in embedded controllers and ensures reliable power-on reset for microprocessor systems during brownout or power-up.
For engineers reviewing the ADM809MAKSZ-REEL7 datasheet, ADM809MAKSZ-REEL7 pinout, ADM809MAKSZ-REEL7 application, or ADM809MAKSZ-REEL7 equivalent, key selection criteria include reset threshold accuracy (±2.5% over temperature), minimum VCC operation down to 1.0 V, 240 ms typical reset timeout, push-pull drive capability (3.2 mA sink), and SC70/SOT-23 package compatibility.
Technical Context
The ADM809MAKSZ-REEL7 integrates a precision voltage comparator with built-in glitch immunity and an internal 240 ms power-on reset timer. Its reset assertion remains valid even as VCC drops to 1.0 V, enabling robust brownout detection in wide-input industrial systems.
It features a fixed 4.38 V reset threshold (ADM8xxM grade) with ±2.5% tolerance over −40°C to +125°C and 30 ppm/°C temperature coefficient. The push-pull RESET output eliminates need for external pull-up resistors and supports direct interfacing to CMOS/TTL logic inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.38 V ±2.5% over −40°C to +125°C - ensures accurate 4.5 V rail monitoring with margin for supply ripple and drift |
| Supply Current | 17 μA typical at VCC < 3.6 V - enables use in battery-powered and low-power portable systems |
| Min Operating VCC | 1.0 V - guarantees reset assertion integrity during deep brownout conditions before system shutdown |
| Reset Timeout | 240 ms typical power-on delay - holds microprocessor in reset until power stabilizes and clocks lock |
| RESET Output Type | Push-pull active-low - drives logic inputs directly without external components; sinks 3.2 mA at VTH min |
| Temperature Range | −40°C to +125°C - qualified for under-hood automotive, industrial control, and harsh-environment applications |
| Package | 3-Lead SOT-23 (RT-3) - surface-mount compatible with standard reflow profiles and high-density PCB layouts |
Pinout & Package
ADM809MAKSZ-REEL7 is housed in a 3-lead SOT-23 (RT-3) package with 1.3 mm × 2.9 mm footprint and 0.95 mm height, compliant with JEDEC TO-236-AB standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Ground Reference | 0 V reference for internal comparator and reset generator; must be connected to system ground plane |
| 2 (RESET) | Active-Low Push-Pull Output | Drives low during reset condition (VCC < 4.38 V); actively pulls high when deasserted - no external pull-up required |
| 3 (VCC) | Supply Input | Monitored voltage rail input; powers internal circuitry and defines reset threshold reference point |
Key Features
| Feature | Design Value |
|---|---|
| Precision reset threshold | 4.38 V with ±2.5% tolerance over full temperature range - reduces false resets caused by supply variation |
| Ultra-low quiescent current | 17 μA typical - extends battery life in always-on monitoring applications such as IoT edge nodes |
| Brownout detection down to 1 V | RESET remains asserted while VCC ≥ 1.0 V - provides fail-safe reset coverage beyond typical LDO dropout |
| Glitch-immune comparator | Immune to fast transients ≤ 100 μs on VCC - prevents spurious resets from switching noise or ESD events |
| Fixed 240 ms reset timeout | Internally timed, temperature-stable delay - eliminates need for external RC timing components and layout sensitivity |
Applications
| Industrial PLC Controller | Automotive Body Control Module |
|---|---|
Use Scenario: Monitors 5 V system rail in programmable logic controller during cold cranking and load dump events. IC Role / Device Role / Timing Role: Supervisory circuit asserting active-low RESET to ARM Cortex-M7 MCU until 5 V rail stabilizes above 4.38 V. Use Value: Prevents firmware execution during undervoltage, avoiding register corruption and watchdog lockup during engine start. | Use Scenario: Embedded in door module ECU to supervise 3.3 V microcontroller supply during battery voltage sag below 9 V. IC Role / Device Role / Timing Role: Resets Infineon AURIX TC3xx via push-pull RESET line when VCC falls below 4.38 V threshold. Use Value: Ensures deterministic boot sequence after ignition cycle; 240 ms timeout accommodates slow LDO recovery post-cranking. |
| Medical Infusion Pump | Smart Energy Meter |
Use Scenario: Guards main 3.3 V MCU supply in Class II medical device requiring IEC 60601-1 compliance. IC Role / Device Role / Timing Role: Provides fail-safe reset signal to TI MSP430FR5994 during AC/DC converter brownout or backup battery switchover. Use Value: Meets safety requirement for immediate processor halt upon supply anomaly; 1.0 V operation covers full battery discharge envelope. | Use Scenario: Supervises isolated 3.3 V rail powering metrology SoC in ANSI C12.20-certified electricity meter. IC Role / Device Role / Timing Role: Generates clean reset pulse to Renesas RL78/I1C during power restoration after grid outage. Use Value: 30 ppm/°C tempco ensures stable threshold across −25°C to +70°C meter enclosure; RoHS-compliant M51 marking meets regulatory traceability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX809TRD3T-T | 4.38 V threshold, SOT-23, but 20 μA max supply current and −40°C to +85°C rating | Limited to commercial-temperature industrial designs; lacks extended-temp qualification | Select when cost sensitivity outweighs automotive/industrial temp range requirements |
| TPS3808G18DBVR | 1.8 V threshold (not 4.38 V); adjustable via external resistor; 1.6 μA typical IQ | Requires external components for 4.38 V setting; not drop-in replacement | Choose only if programmable threshold and ultra-low IQ are prioritized over pin compatibility |
Compared with MAX809TRD3T-T, ADM809MAKSZ-REEL7 offers guaranteed operation to +125°C and tighter threshold tolerance; versus TPS3808G18DBVR, it delivers true plug-and-play 4.38 V supervision without calibration or external resistors.
Availability
ADM809MAKSZ-REEL7 is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, medical infusion pumps, and smart energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ADM809MAKSZ-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 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 supervisory IC product line, engineered specifically for deterministic power-on reset and brownout protection in mission-critical microprocessor systems where reliability and temperature stability are non-negotiable.
FAQ
What is the exact reset threshold voltage of ADM809MAKSZ-REEL7 and how does it vary with temperature?
The ADM809MAKSZ-REEL7 has a nominal reset threshold of 4.38 V, specified as 4.31 V (min) to 4.45 V (max) over −40°C to +85°C and 4.20 V (min) to 4.56 V (max) over −40°C to +125°C. Its temperature coefficient is 30 ppm/°C, meaning threshold drift is bounded and predictable across the full operating range - critical for systems where supply margin is tight.
Does ADM809MAKSZ-REEL7 require an external pull-up resistor on the RESET pin?
No, ADM809MAKSZ-REEL7 uses a push-pull RESET output, so it actively drives both high and low states without needing an external pull-up resistor. This simplifies board layout, reduces BOM count, and improves noise immunity compared to open-drain alternatives like the ADM803 series.
Can ADM809MAKSZ-REEL7 operate reliably when the supply voltage drops below 2.0 V?
Yes - ADM809MAKSZ-REEL7 guarantees RESET assertion down to VCC = 1.0 V, maintaining valid logic levels and timing integrity well into deep brownout conditions. This capability ensures safe microprocessor halt even during catastrophic supply collapse, supporting fail-safe behavior in safety-critical applications.
What is the power-on reset timeout duration of ADM809MAKSZ-REEL7 and is it adjustable?
The ADM809MAKSZ-REEL7 provides a fixed 240 ms typical power-on reset timeout, internally generated and unadjustable. This value is temperature-stable and factory-trimmed to ensure consistent reset hold time across all units and operating conditions - eliminating variability introduced by external RC networks.
Is ADM809MAKSZ-REEL7 RoHS compliant and what package variant does it use?
Yes, ADM809MAKSZ-REEL7 is RoHS compliant (denoted by the "Z" suffix) and shipped in a 3-lead SOT-23 package (JEDEC RT-3 outline). Its top marking "M51" and reel packaging ("REEL7" = 3,000-piece tape-and-reel) confirm full compliance with environmental and assembly standards for modern electronics manufacturing.
ADM809MAKSZ-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:
- 4.38V
- 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
ADM809MAKSZ-REEL7 FAQ
1.How can I place an order for ADM809MAKSZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM809MAKSZ-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 ADM809MAKSZ-REEL7 reliable?
The price and inventory of ADM809MAKSZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM809MAKSZ-REEL7 is usually 5 days.
3.What payment methods are accepted for ADM809MAKSZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM809MAKSZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM809MAKSZ-REEL7?
ADM809MAKSZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM809MAKSZ-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 ADM809MAKSZ-REEL7?
For technical support, including ADM809MAKSZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM809MAKSZ-REEL7 requirements.
6.How does Aetrix verify that ADM809MAKSZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All ADM809MAKSZ-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 ADM809MAKSZ-REEL7 meets industry standards.
7.What is the process for return or replacement of ADM809MAKSZ-REEL7?
All ADM809MAKSZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADM809MAKSZ-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 ADM809MAKSZ-REEL7 part is unused and in its original packaging.
Return procedure for ADM809MAKSZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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