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Analog Devices Inc. ADM709TAR-REEL
- Part No.:
- ADM709TAR-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADM709TAR-REEL.pdf
- Description:
- IC SUPERVISOR MPU 3.08V RS 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:17,200
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Product details
Overview
ADM709TAR-REEL from Analog Devices is a precision power supply monitor IC with active-low reset output, 3.08 V threshold, 140 ms minimum power-on reset pulse, and operation down to 1 V supply voltage - used for reliable microprocessor reset in +3 V systems.
For engineers reviewing the ADM709TAR-REEL datasheet, ADM709TAR-REEL pinout, ADM709TAR-REEL application, or ADM709TAR-REEL equivalent, key selection criteria include reset threshold accuracy, guaranteed reset assertion below 1 V, glitch-immune VCC monitoring, and SOIC-8 compatibility with legacy MAX709-based designs.
Technical Context
The ADM709TAR-REEL implements a comparator-based reset generator with internal timing circuitry that holds RESET low for ≥140 ms after VCC rises above 3.08 V (±70 mV), and asserts RESET immediately when VCC falls below threshold. It operates across –40°C to +85°C with no external components required.
Its RESET output is open-drain compatible, sinks up to 1.2 mA at 0.3 V, and remains functional with VCC as low as 1.0 V - enabling robust brownout detection and controlled shutdown in low-voltage embedded systems without auxiliary biasing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08 V ±70 mV - precisely matches +3 V rail monitoring with margin for tolerance and drift. |
| Power-On Reset Pulse | ≥140 ms - ensures microprocessor stabilization before release from reset after power-up. |
| VCC Operating Range | 1.0 V to 5.5 V - supports valid reset assertion during deep brownout and full-system power sequencing. |
| Supply Current | 35 µA typical at VCC < 3.6 V - enables ultra-low-power system supervision without loading supply rails. |
| RESET Output Type | Active-low open-drain - allows wired-OR configuration and interface with bidirectional µP reset lines via series resistor. |
| Glitch Immunity | Immune to short VCC transients - prevents spurious resets from noise or switching spikes on power rail. |
| Temperature Range | –40°C to +85°C - qualified for industrial and automotive under-hood environments. |
Pinout & Package
ADM709TAR-REEL is housed in an 8-pin SOIC (SO-8) package with standard JEDEC MS-012AC dimensions and gull-wing leads. Pin 1 is marked by a beveled corner or notch; pins 1, 4, 5, 6, and 8 are no-connect (NC); only VCC (Pin 2), GND (Pin 3), and RESET (Pin 7) are functional.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 2) | Power supply input | Monitored +3 V rail; device draws current only from this pin; supports operation down to 1.0 V. |
| GND (Pin 3) | Ground reference | Return path for internal comparator and RESET driver; must be low-impedance connection to system ground plane. |
| RESET (Pin 7) | Active-low reset output | Open-drain output requiring external pull-up; asserts low during power-up, brownout, and power-down until VCC ≥ 3.08 V + 140 ms. |
| NC (Pins 1, 4, 5, 6, 8) | No electrical connection | Unused silicon pads; may be left unconnected or tied to GND for mechanical stability - no functional impact. |
Key Features
| Feature | Design Value |
|---|---|
| Precision 3.08 V threshold | Enables accurate supervision of +3 V systems without external resistive divider or calibration. |
| 140 ms min power-on reset | Guarantees sufficient time for clock oscillators, PLLs, and memory initialization before µP execution begins. |
| Operation down to 1.0 V VCC | Ensures continuous reset assertion through deep brownout, preventing undefined µP state during supply collapse. |
| Glitch-immune VCC sensing | Rejects sub-20 µs transients on supply rail - eliminates false resets caused by digital switching noise or ESD events. |
| SOIC-8 footprint compatibility | Direct PCB replacement for MAX709TAR and other industry-standard 3 V reset supervisors in existing layouts. |
Applications
| Industrial PLC Controller | Medical Infusion Pump |
|---|---|
Use Scenario: Power cycling and brownout events during field deployment in factory automation cabinets. IC Role / Device Role / Timing Role: System-level reset supervisor ensuring deterministic µP restart after AC line sags or backup battery transitions. Use Value: Prevents firmware corruption and unsafe actuator states by holding reset until stable +3 V rail and 140 ms stabilization window are confirmed. | Use Scenario: Battery-backed operation with gradual voltage decay during extended runtime. IC Role / Device Role / Timing Role: Low-voltage detector asserting reset before MCU enters undefined operating region below 2.7 V. Use Value: Guarantees safe shutdown and data integrity preservation by maintaining RESET assertion down to 1.0 V VCC. |
| Automotive Telematics Unit | Smart Energy Meter |
Use Scenario: Cold-cranking and load-dump transients on 12 V vehicle bus powering +3.3 V DC/DC converter. IC Role / Device Role / Timing Role: Glitch-immune reset generator interfacing with ARM Cortex-M4 host processor via 4.7 kΩ series resistor. Use Value: Eliminates false resets during engine start-up surges, improving boot reliability and reducing field failure rates. | Use Scenario: Mains-powered meter with supercapacitor backup sustaining real-time clock during outages. IC Role / Device Role / Timing Role: Dual-role supervisor - initiates clean reboot on AC restore and forces safe shutdown on capacitor depletion. Use Value: Enables seamless transition between power sources while preserving metering accuracy and tamper logs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar power supply monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX709TCSA+ | Same 3.08 V threshold, 200 ms reset timeout, higher quiescent current (15 µA vs. 35 µA typ), SO-8 package. | Valid for legacy Maxim-based designs; requires verification of timing margin due to longer timeout. | Select if MAX709 footprint and timing profile are already validated in design; not drop-in due to timeout difference. |
| TPS3808G30DBVR | 3.0 V threshold (±0.5%), 200 ms fixed delay, 1.4 µA quiescent current, SOT-23-5 package. | Smaller footprint and lower power, but lacks 1 V operation guarantee and open-drain flexibility. | Prefer for space-constrained, battery-operated systems where 1 V operation is not required. |
Compared with MAX709TCSA+ and TPS3808G30DBVR, the ADM709TAR-REEL uniquely combines 1 V operational guarantee, SOIC-8 compatibility, and precise 3.08 V threshold - making it optimal for industrial +3 V systems requiring fail-safe brownout response without layout change.
Availability
ADM709TAR-REEL is available at Aetrix Electronics and suitable for industrial PLC controllers, medical infusion pumps, automotive telematics units, and smart energy meters requiring stable component supply and long-term lifecycle support.
Supply support for ADM709TAR-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 ADM709 belongs to Analog Devices' precision power monitoring product line, designed specifically for deterministic microprocessor reset generation in industrial, automotive, and medical systems with stringent reliability requirements.
FAQ
What is the exact reset threshold voltage of the ADM709TAR-REEL?
The ADM709TAR-REEL has a nominal reset threshold of 3.08 V, with a guaranteed range of 3.00 V to 3.15 V over the full –40°C to +85°C temperature range. This value is laser-trimmed at wafer test and does not require external calibration. The threshold is referenced internally to bandgap voltage, ensuring stability across supply and temperature variations. All ADM709TAR-REEL units meet this specification per Analog Devices' production test flow.
Does the ADM709TAR-REEL support operation below 1.5 V VCC?
Yes, the ADM709TAR-REEL guarantees functional RESET output down to 1.0 V VCC, as specified in the Absolute Maximum Ratings and confirmed in the ADM709–SPECIFICATIONS table. Below 1.0 V, the RESET output is not guaranteed - however, adding a 100 kΩ pull-down resistor between RESET and GND ensures it remains low during deep undervoltage conditions. This behavior is explicitly documented in the "RESET at Voltages < 1 V" section of the datasheet.
Is the ADM709TAR-REEL pin-compatible with the MAX709TAR?
The ADM709TAR-REEL is functionally and physically pin-compatible with the MAX709TAR in SO-8 packages: both use Pin 2 for VCC, Pin 3 for GND, and Pin 7 for active-low RESET, with identical NC pin assignments. However, the ADM709TAR-REEL offers tighter threshold tolerance (±70 mV vs. ±150 mV for MAX709T) and guaranteed 1 V operation - making it a direct upgrade without PCB changes, provided timing margins accommodate the 140 ms minimum reset pulse.
What is the maximum sink current capability of the ADM709TAR-REEL RESET output?
The ADM709TAR-REEL RESET output can sink up to 1.2 mA while maintaining a voltage ≤0.3 V at VCC ≥ reset threshold minimum, per the Electrical Characteristics table. At higher currents or lower VCC, the output voltage rises - e.g., at 50 µA sink, RESET remains ≤0.3 V even with VCC ≥1.0 V. This ensures reliable logic-low signaling into standard CMOS inputs and compatibility with series-resistor interfaces to bidirectional µP reset lines.
Can the ADM709TAR-REEL be used in automotive applications?
Yes, the ADM709TAR-REEL is rated for –40°C to +85°C operation and features glitch immunity, 1 V operation, and robust ESD rating (>5 kV), making it suitable for automotive telematics, body control modules, and infotainment power supervision. While not AEC-Q200 qualified, its performance envelope meets common non-safety-critical automotive requirements. For ASIL-B/C systems, additional system-level validation is required - but the ADM709TAR-REEL itself provides the foundational reset reliability needed in such designs.
ADM709TAR-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- 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:
- 8-SOIC
ADM709TAR-REEL FAQ
1.How can I place an order for ADM709TAR-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM709TAR-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 ADM709TAR-REEL reliable?
The price and inventory of ADM709TAR-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM709TAR-REEL is usually 5 days.
3.What payment methods are accepted for ADM709TAR-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM709TAR-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM709TAR-REEL?
ADM709TAR-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM709TAR-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 ADM709TAR-REEL?
For technical support, including ADM709TAR-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM709TAR-REEL requirements.
6.How does Aetrix verify that ADM709TAR-REEL is sourced from the original manufacturer or authorized distributors?
All ADM709TAR-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 ADM709TAR-REEL meets industry standards.
7.What is the process for return or replacement of ADM709TAR-REEL?
All ADM709TAR-REEL units undergo pre-shipment inspection (PSI). If there is an issue with ADM709TAR-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 ADM709TAR-REEL part is unused and in its original packaging.
Return procedure for ADM709TAR-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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