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Analog Devices Inc. ADM709RARZ-REEL
- Part No.:
- ADM709RARZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADM709RARZ-REEL.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,032
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Product details
Overview
ADM709RARZ-REEL from Analog Devices is a precision power supply monitor IC with active-low reset output, 2.63 V threshold, 140 ms minimum power-on reset timeout, and operation down to 1 V supply voltage. It serves as a system supervisory circuit for microprocessor reset during power-up, brownout, and power-down in embedded controllers and industrial instrumentation.
For engineers reviewing the ADM709RARZ-REEL datasheet, ADM709RARZ-REEL pinout, ADM709RARZ-REEL application, or ADM709RARZ-REEL equivalent, key selection criteria include reset threshold accuracy (±2.7% over temperature), guaranteed RESET assertion below 1 V, glitch immunity on VCC, SOIC-8 package compatibility, and direct upgrade path from MAX709 series.
Technical Context
The ADM709RARZ-REEL implements a bandgap-based voltage comparator with internal timing capacitor to generate a minimum 140 ms active-low reset pulse after VCC rises above 2.63 V. Its RESET output remains functional down to VCC = 1.0 V, enabling reliable shutdown sequencing.
It features no-connect pins (1, 4, 5, 6, 8) and uses only VCC (Pin 2), GND (Pin 3), and RESET (Pin 7) for operation. The device is immune to short VCC transients and supports bidirectional µP reset lines via external series resistor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.63 V ±2.7% (ensures reliable reset assertion for +3 V systems) |
| Power-On Reset Timeout | 140 ms min (guarantees µP stabilization before release) |
| VCC Operating Range | 1.0 V to 5.5 V (supports low-voltage brownout detection and safe shutdown) |
| Supply Current | 35 µA typ at VCC < 3.6 V (ultra-low quiescent power for battery-backed systems) |
| RESET Output Drive | 0.3 V max at 1.2 mA sink (compatible with TTL/CMOS inputs) |
| Operating Temperature | –40°C to +85°C (industrial-grade thermal reliability) |
| Package | SOIC-8 (standard surface-mount footprint, 150 mil width) |
Pinout & Package
ADM709RARZ-REEL is housed in an 8-lead SOIC (SO-8) package with standard 150-mil body width and 1.27 mm pitch. Pin 1 is marked by a beveled corner or notch; pins are numbered counterclockwise.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 2) | Positive supply input | Accepts 1.0–5.5 V; powers internal comparator and timer |
| GND (Pin 3) | Ground reference | 0 V return for all internal circuitry and RESET output |
| RESET (Pin 7) | Active-low reset output | Open-drain compatible; sinks up to 1.2 mA; asserts low during fault or startup |
| NC (Pins 1,4,5,6,8) | No-connect terminals | Internally unconnected; must remain floating or grounded per layout best practice |
Key Features
| Feature | Design Value |
|---|---|
| Precision 2.63 V threshold | Enables accurate monitoring of +3 V rails without external resistive dividers |
| 140 ms min reset timeout | Guarantees sufficient time for power supply and µP clock stabilization post-power-up |
| Operation down to 1.0 V VCC | Ensures controlled reset assertion during deep brownout or battery depletion |
| Glitch-immune VCC sensing | Rejects transients ≤10 µs, preventing spurious resets from supply noise |
| SOIC-8 footprint | Direct drop-in replacement for legacy supervisory ICs in space-constrained designs |
Applications
| Industrial PLC Controllers | Medical Diagnostic Instruments |
|---|---|
Use Scenario: Power sequencing and fault recovery in programmable logic controllers operating in harsh factory environments. IC Role / Device Role / Timing Role: System-level power supervisor generating active-low reset signal synchronized to 2.63 V rail collapse or recovery. Use Value: Prevents firmware corruption during brownout by holding µP in reset until stable +3.3 V is confirmed and 140 ms timeout expires. | Use Scenario: Ensuring deterministic boot behavior in portable ultrasound or ECG units with dual-supply architectures. IC Role / Device Role / Timing Role: Critical power monitor for the main +3 V analog front-end and digital subsystem. Use Value: Guarantees reset assertion even when battery voltage drops to 1.0 V, enabling safe shutdown before data loss. |
| Automotive Body Control Modules | Smart Energy Meters |
Use Scenario: Supervising microcontroller operation in non-safety-critical vehicle subsystems exposed to wide temperature swings. IC Role / Device Role / Timing Role: Voltage threshold detector with industrial-grade temperature range (–40°C to +85°C). Use Value: Maintains reset integrity across automotive cold-crank (low-VCC) and hot-soak conditions without external compensation. | Use Scenario: Providing fail-safe reset for metrology SoCs in utility-grade electricity meters with long field life requirements. IC Role / Device Role / Timing Role: Low-quiescent-current (35 µA) supervisory IC supporting 10+ year battery backup. Use Value: Minimizes self-discharge impact on primary lithium battery while ensuring reliable power-fail detection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar power supply monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX709RCSA+ | Same 2.63 V threshold, but higher quiescent current (50 µA typ) and no sub-1 V RESET guarantee | Lacks guaranteed RESET operation below 1.0 V; less suitable for ultra-low-brownout detection | Prefer ADM709RARZ-REEL where deep brownout holdover is required |
| TPS3808G12DBVR | Adjustable threshold (via external resistor), 200 ms fixed timeout, 1.8–6.0 V VCC range | Requires external components for threshold setting; not pin-compatible | Choose TPS3808G12DBVR only when programmability or wider VCC range outweighs simplicity |
Compared with MAX709RCSA+ and TPS3808G12DBVR, the ADM709RARZ-REEL delivers superior low-voltage reset assurance (down to 1.0 V), lower quiescent current, and true plug-and-play SOIC-8 compatibility-making it optimal for cost-sensitive, high-reliability +3 V system supervision without design iteration.
Availability
ADM709RARZ-REEL is available at Aetrix Electronics and suitable for industrial PLC controllers, medical diagnostic instruments, automotive body control modules, and smart energy meters requiring stable component supply and long-term lifecycle support.
Supply support for ADM709RARZ-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, founded in 1965 and headquartered in Wilmington, MA.
The ADM709 belongs to Analog Devices' supervisory IC product line, engineered specifically for robust, low-power microprocessor reset generation in industrial, medical, and automotive applications where supply voltage integrity is mission-critical.
FAQ
What is the exact reset threshold voltage of the ADM709RARZ-REEL?
The ADM709RARZ-REEL has a nominal reset threshold of 2.63 V, with a tolerance of ±2.7% over the full industrial temperature range (–40°C to +85°C). This value is laser-trimmed at wafer test and specified in the Absolute Maximum Ratings table under "Reset Threshold" for suffix R. It ensures precise monitoring of +3 V supply rails without external calibration.
Does the ADM709RARZ-REEL support operation below 1 V VCC?
The ADM709RARZ-REEL RESET output is guaranteed functional down to VCC = 1.0 V, but does not actively assert below that level. For continuous low-voltage reset hold, a 100 kΩ pull-down resistor between RESET and GND is recommended per the datasheet Figure 5. This ensures the microprocessor remains held in reset during deep brownout or battery exhaustion scenarios.
Is the ADM709RARZ-REEL pin-compatible with the MAX709 series?
Yes-the ADM709RARZ-REEL is a direct functional and pin-compatible upgrade for the MAX709R variant in SOIC-8 packaging. Both share identical pinout (VCC=2, GND=3, RESET=7), same 2.63 V threshold, and 140 ms minimum reset timeout. No PCB changes are required when replacing MAX709RCSA+ with ADM709RARZ-REEL.
What is the maximum sink current capability of the ADM709RARZ-REEL RESET output?
The ADM709RARZ-REEL RESET output can sink up to 1.2 mA while maintaining a logic-low voltage ≤0.3 V (at TA = –40°C to +85°C). This meets standard TTL and CMOS input requirements and allows direct interfacing with most microcontrollers without external buffering. Higher sink loads require verification against the 0.3 V max spec at worst-case temperature and voltage.
Can the ADM709RARZ-REEL be used in automotive applications?
Yes-the ADM709RARZ-REEL is qualified for industrial temperature range (–40°C to +85°C) and widely deployed in automotive body control modules and infotainment subsystems. While not AEC-Q100 certified, its proven reliability, glitch immunity, and brownout resilience make it suitable for non-safety-critical automotive functions where extended temperature operation and reset integrity are essential.
ADM709RARZ-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:
- 2.63V
- 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
ADM709RARZ-REEL FAQ
1.How can I place an order for ADM709RARZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM709RARZ-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 ADM709RARZ-REEL reliable?
The price and inventory of ADM709RARZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM709RARZ-REEL is usually 5 days.
3.What payment methods are accepted for ADM709RARZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM709RARZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM709RARZ-REEL?
ADM709RARZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM709RARZ-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 ADM709RARZ-REEL?
For technical support, including ADM709RARZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM709RARZ-REEL requirements.
6.How does Aetrix verify that ADM709RARZ-REEL is sourced from the original manufacturer or authorized distributors?
All ADM709RARZ-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 ADM709RARZ-REEL meets industry standards.
7.What is the process for return or replacement of ADM709RARZ-REEL?
All ADM709RARZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with ADM709RARZ-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 ADM709RARZ-REEL part is unused and in its original packaging.
Return procedure for ADM709RARZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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