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Analog Devices Inc. ADM709MAR-REEL
- Part No.:
- ADM709MAR-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADM709MAR-REEL.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,296
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Product details
Overview
ADM709MAR-REEL from Analog Devices is a precision power supply monitor IC with active-low reset output, 4.40 V threshold, 140 ms minimum power-on reset pulse, and operation down to 1 V supply voltage; used for reliable microprocessor reset in industrial embedded systems during power-up, brownout, and power-down events.
For engineers reviewing the ADM709MAR-REEL datasheet, ADM709MAR-REEL pinout, ADM709MAR-REEL application, or ADM709MAR-REEL equivalent, key selection factors include reset threshold tolerance (±0.15 V), guaranteed RESET hold time at low VCC, SOIC-8 package compatibility, and quiescent current under temperature extremes.
Technical Context
The ADM709MAR-REEL implements a bandgap-based voltage comparator with internal timing circuitry to generate a minimum 140 ms active-low RESET pulse after VCC rises above 4.40 V. It operates across –40°C to +85°C with no external components required.
RESET remains functional down to VCC = 1.0 V, and the device exhibits inherent immunity to sub-20 µs supply transients. Its open-drain output supports wired-OR configurations and interfaces directly with TTL/CMOS inputs without level-shifting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.40 V ±0.15 V - ensures reliable detection of +5 V supply brownout before microprocessor instability occurs. |
| Power-On Reset Pulse | 140 ms (min) - provides sufficient stabilization time for microprocessors and peripheral clocks after power-up. |
| VCC Operating Range | 1.0 V to 5.5 V - enables valid RESET assertion even during deep brownout or battery backup conditions. |
| Quiescent Current | 35 µA (typ) at VCC < 3.6 V - minimizes standby power impact in always-on monitoring applications. |
| RESET Output Type | Active-low open-drain - allows flexible pull-up configuration and direct connection to bidirectional µP reset pins. |
| Temperature Range | –40°C to +85°C - qualified for industrial-grade embedded control and automotive body electronics. |
Pinout & Package
ADM709MAR-REEL is housed in an 8-lead SOIC (SO-8) package with standard JEDEC MS-012AC dimensions (width 3.90 mm, length 4.90 mm, height 1.75 mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 5, 6, 8 | No Connect | Internally unconnected; must remain floating or grounded per layout best practice-no routing required. |
| 2 | VCC Supply Input | Primary power input; accepts 1.0 V–5.5 V; requires local 0.1 µF bypass capacitor for glitch immunity. |
| 3 | GND | Analog ground reference; must be connected to system ground plane with low-inductance path. |
| 7 | RESET Output | Active-low open-drain output; requires external pull-up resistor (typically 10 kΩ) to host logic rail. |
Key Features
| Feature | Design Value |
|---|---|
| Precision 4.40 V threshold | ±0.15 V tolerance over full temperature range ensures consistent reset activation across operating conditions. |
| 140 ms min power-on reset | Guaranteed minimum timeout eliminates need for external RC timing networks in µP reset circuits. |
| Operation down to 1.0 V VCC | Enables fail-safe reset assertion during deep undervoltage, critical for nonvolatile memory write protection. |
| SOIC-8 packaging | Industry-standard footprint compatible with automated assembly and existing board layouts for MAX709 upgrades. |
Applications
| Industrial PLC Controllers | Automotive Body Control Modules |
|---|---|
Use Scenario: Power sequencing and brownout recovery in programmable logic controllers exposed to 24 V DC supply fluctuations. IC Role / Device Role / Timing Role: Supervisory reset generator ensuring deterministic µP restart after line sag or transient dropout. Use Value: Prevents corrupted I/O state or firmware lockup by enforcing 140 ms minimum reset hold time post-recovery. | Use Scenario: Monitoring 5 V regulated supply in door module ECUs subject to load dump and cold-crank conditions. IC Role / Device Role / Timing Role: Voltage supervisor with 4.40 V threshold aligned to automotive 5 V rail specification limits. Use Value: Guarantees reset assertion before microcontroller enters undefined behavior during battery voltage collapse. |
| Medical Diagnostic Handhelds | Network Edge Routers |
Use Scenario: Battery-backed operation where main supply may dip below 3.3 V during high-current bursts. IC Role / Device Role / Timing Role: Low-voltage supervisor enabling safe shutdown and data preservation prior to brownout. Use Value: Maintains valid RESET signal down to 1.0 V VCC, supporting graceful firmware save before power loss. | Use Scenario: Dual-rail 5 V/3.3 V power domain supervision in fanless edge networking hardware. IC Role / Device Role / Timing Role: Primary reset source for ARM-based SoC, interfacing via open-drain to accommodate bidirectional reset lines. Use Value: Eliminates need for discrete transistor buffer when driving reset inputs on processors like NXP i.MX series. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar power supply monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX709SUR+T | 4.65 V threshold, 200 ms reset timeout, same SO-8 package, higher quiescent current (100 µA typ) | Better suited for legacy +5 V systems requiring tighter threshold margin; less tolerant of 3.3 V rail drift | Select if design uses 5 V ±5% supply and requires longer reset hold time than ADM709MAR-REEL provides. |
| TPS3808G33DBVR | 3.3 V threshold, adjustable delay (1.25 ms–10 s), SOT-23-6 package, 1.6 µA quiescent current | Optimized for ultra-low-power 3.3 V systems; lacks 4.40 V option and SOIC-8 mechanical compatibility | Choose for battery-powered devices needing programmable delay and minimal current draw-requires PCB redesign. |
Compared with MAX709SUR+T and TPS3808G33DBVR, the ADM709MAR-REEL uniquely balances 4.40 V threshold accuracy, SOIC-8 drop-in compatibility with legacy designs, and guaranteed 1 V operation-making it optimal for industrial upgrades where supply stability margins are narrow and layout changes are constrained.
Availability
ADM709MAR-REEL is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, and medical handheld diagnostics requiring stable component supply and long-term lifecycle support.
Supply support for ADM709MAR-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, headquartered in Norwood, MA.
The ADM709 belongs to Analog Devices' supervisory IC product line, designed specifically for robust, low-component-count power monitoring in microprocessor-based systems where reliability under voltage stress is critical.
FAQ
What is the exact reset threshold voltage for ADM709MAR-REEL?
The ADM709MAR-REEL has a nominal reset threshold of 4.40 V, with a guaranteed range of 4.25 V to 4.50 V across the full –40°C to +85°C temperature range. This value is laser-trimmed at wafer test and specified in the Absolute Maximum Ratings table of the official Analog Devices datasheet Rev. 0.
Does ADM709MAR-REEL support operation below 2.0 V VCC?
Yes, ADM709MAR-REEL guarantees functional RESET output down to VCC = 1.0 V. Below 1.0 V, the RESET output is not specified; however, a 100 kΩ pull-down resistor to GND ensures it remains low, preserving safe microprocessor shutdown state during deep undervoltage.
Is ADM709MAR-REEL pin-compatible with MAX709 variants?
Yes, ADM709MAR-REEL is a functional upgrade for MAX709M in SO-8 package: identical pinout (VCC on Pin 2, RESET on Pin 7, GND on Pin 3), same 4.40 V threshold, and improved 1 V minimum operating voltage versus MAX709's 2.5 V limit.
What is the typical quiescent current of ADM709MAR-REEL at 3.3 V and 25°C?
At VCC = 3.3 V and TA = 25°C, ADM709MAR-REEL draws 35 µA typical quiescent current. The datasheet specifies 35 µA to 110 µA over –40°C to +85°C, making it suitable for low-power always-on monitoring in battery-buffered systems.
Can ADM709MAR-REEL drive a microcontroller reset pin directly?
Yes, ADM709MAR-REEL's open-drain RESET output can drive most microcontroller reset inputs directly when paired with an appropriate pull-up resistor (e.g., 10 kΩ to 3.3 V or 5 V). For bidirectional reset lines (e.g., MC68HC11), a 4.7 kΩ series resistor is recommended to prevent contention.
ADM709MAR-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.4V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ADM709MAR-REEL FAQ
1.How can I place an order for ADM709MAR-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM709MAR-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 ADM709MAR-REEL reliable?
The price and inventory of ADM709MAR-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM709MAR-REEL is usually 5 days.
3.What payment methods are accepted for ADM709MAR-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM709MAR-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM709MAR-REEL?
ADM709MAR-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM709MAR-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 ADM709MAR-REEL?
For technical support, including ADM709MAR-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM709MAR-REEL requirements.
6.How does Aetrix verify that ADM709MAR-REEL is sourced from the original manufacturer or authorized distributors?
All ADM709MAR-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 ADM709MAR-REEL meets industry standards.
7.What is the process for return or replacement of ADM709MAR-REEL?
All ADM709MAR-REEL units undergo pre-shipment inspection (PSI). If there is an issue with ADM709MAR-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 ADM709MAR-REEL part is unused and in its original packaging.
Return procedure for ADM709MAR-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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