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Analog Devices Inc. ADM709SARZ-REEL
- Part No.:
- ADM709SARZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADM709SARZ-REEL.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,002
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Product details
Overview
ADM709SARZ-REEL from Analog Devices is a precision power supply monitor IC with active-low reset output, 2.93 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.
For engineers reviewing the ADM709SARZ-REEL datasheet, ADM709SARZ-REEL pinout, ADM709SARZ-REEL application, or ADM709SARZ-REEL equivalent, key selection factors include reset threshold accuracy, guaranteed reset assertion at VCC ≥ 1 V, glitch immunity on VCC, SOIC-8 package compatibility, and direct upgrade path from MAX709 series.
Technical Context
The ADM709SARZ-REEL integrates a precision voltage comparator and internal timer to generate a clean, glitch-immune active-low reset signal. It asserts RESET when VCC falls below 2.93 V (±75 mV) and holds it low for ≥140 ms after VCC rises above threshold.
VCC-to-RESET delay is ≤20 µs; RESET remains functional down to 1.0 V supply; quiescent current is 35–110 µA across –40°C to +85°C; output sink capability is 1.2 mA at 0.3 V max low-level voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.93 V ±75 mV - precisely monitors +3 V rail with margin for brownout detection |
| Power-On Reset Pulse | ≥140 ms - ensures stable microprocessor initialization after power-up |
| Minimum Operating VCC | 1.0 V - guarantees RESET assertion during deep brownout or controlled shutdown |
| Quiescent Current | 35 µA (typ) at VCC < 3.6 V - enables ultra-low-power system monitoring |
| RESET Output Sink | 1.2 mA @ 0.3 V max - drives standard TTL/CMOS inputs without external pull-down |
| Glitch Immunity | Immune to short VCC transients - prevents spurious resets from supply noise |
| Operating Temp Range | –40°C to +85°C - qualified for industrial ambient conditions |
Pinout & Package
ADM709SARZ-REEL is housed in an 8-lead SOIC (SO-8) package with standard JEDEC MS-012AC dimensions and gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 5, 6, 8 | No Connect | Internally unconnected; must remain floating or grounded per layout best practice |
| 2 | VCC Supply Input | Accepts 1.0 V to 5.5 V; powers internal comparator and timer |
| 3 | GND | Ground reference for all internal circuitry and RESET output |
| 7 | RESET (Active-Low) | Open-drain compatible output; sinks current to hold µP in reset |
Key Features
| Feature | Design Value |
|---|---|
| Precision 2.93 V threshold | Enables accurate +3 V rail monitoring with ±2.6% tolerance over temperature |
| 140 ms min reset timeout | Guarantees sufficient time for µP clock stabilization and memory initialization |
| Operation down to 1 V VCC | Maintains deterministic reset behavior during deep undervoltage events |
| SOIC-8 footprint | Direct PCB replacement for legacy MAX709S and other 8-pin supervisory ICs |
| Glitch-immune VCC sensing | Rejects sub-20 µs supply transients-no external RC filtering required |
Applications
| Industrial PLC Controllers | Medical Diagnostic Equipment |
|---|---|
Use Scenario: Power sequencing and brownout recovery in programmable logic controllers operating in factory environments with fluctuating 3.3 V supplies. IC Role / Device Role / Timing Role: Supervisory IC providing active-low reset to ARM Cortex-M7 microcontroller during VCC dips below 2.93 V. Use Value: Prevents firmware corruption by enforcing ≥140 ms reset hold time after each undervoltage event. | Use Scenario: Critical power monitoring in portable ultrasound units where battery voltage drops near 3 V during high-current imaging bursts. IC Role / Device Role / Timing Role: System-level reset generator asserting RESET at 2.93 V threshold and sustaining it until VCC recovers and stabilizes. Use Value: Ensures safe shutdown and restart of FPGA-based beamforming logic before supply collapse. |
| Automotive Body Control Modules | Smart Energy Meters |
Use Scenario: Cold-cranking scenarios in 12 V automotive systems with buck-converted 3.3 V domain powering CAN microcontrollers. IC Role / Device Role / Timing Role: Voltage supervisor interfacing directly to MC9S12XDP512 reset input via 4.7 kΩ isolation resistor. Use Value: Eliminates false resets from ignition switch bounce or alternator ripple due to built-in glitch immunity. | Use Scenario: Long-life AMI meter design requiring >10-year reliability under wide-temperature grid power fluctuations. IC Role / Device Role / Timing Role: Primary reset source for MSP430F6779A, asserting reset during AC/DC converter brownouts. Use Value: Leverages 35 µA quiescent current and –40°C to +85°C rating for extended field deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar power supply monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX709SASA+ | Same 2.93 V threshold, but 200 ms typ reset timeout; higher 50 µA quiescent current; DIP-8/SO-8 dual package option | Legacy pinout identical; requires same PCB footprint but lacks 1 V minimum VCC operation | Preferred for drop-in replacement where extended reset timing is acceptable and 1 V operation not required |
| TPS3808G33DBVR | 2.93 V threshold with adjustable delay (via capacitor); 1.8–6 V VCC range; 1.6 µA quiescent current; SOT-23-6 package | Smaller footprint and lower power, but requires external timing capacitor and has no 1 V VCC guarantee | Selected when board space and standby power are critical, and reset timing can be tuned externally |
Compared with MAX709SASA+, ADM709SARZ-REEL offers guaranteed operation down to 1 V and tighter reset timeout control; versus TPS3808G33DBVR, it delivers fixed, production-ready timing without external components but in a larger SO-8 package.
Availability
ADM709SARZ-REEL is available at Aetrix Electronics and suitable for industrial PLC controllers, medical diagnostic equipment, automotive body control modules, and smart energy meters requiring stable component supply and long-term lifecycle support.
Supply support for ADM709SARZ-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 family was designed specifically for robust, low-cost microprocessor reset supervision in industrial and automotive systems requiring precise voltage thresholds and reliable power-on timing.
FAQ
What is the exact reset threshold voltage for ADM709SARZ-REEL?
The ADM709SARZ-REEL has a nominal reset threshold of 2.93 V, with a guaranteed range of 2.85 V to 3.00 V over the full –40°C to +85°C operating 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 ADM709SARZ-REEL support operation below 2.0 V supply voltage?
Yes, ADM709SARZ-REEL is fully specified to operate with VCC as low as 1.0 V. Its RESET output remains functional and asserted low down to this level, enabling deterministic shutdown behavior during deep brownout conditions - a key differentiator from many competing supervisors.
What is the minimum guaranteed reset pulse width for ADM709SARZ-REEL on power-up?
The ADM709SARZ-REEL guarantees a minimum reset pulse width of 140 ms after VCC rises above the 2.93 V threshold. Typical duration is 280 ms, and maximum is 380 ms. This timing is generated by an internal oscillator-based timer and does not require external components.
Is ADM709SARZ-REEL pin-compatible with MAX709S?
Yes, ADM709SARZ-REEL uses the same SO-8 pinout as MAX709S, with identical VCC (Pin 2), GND (Pin 3), and RESET (Pin 7) assignments and NC pins (1, 4, 5, 6, 8). It is a functional and mechanical drop-in upgrade, offering improved 1 V operation and tighter threshold tolerance.
Can ADM709SARZ-REEL drive a microcontroller reset pin directly without external components?
Yes, ADM709SARZ-REEL's RESET output can directly drive most microcontroller reset inputs. It sinks up to 1.2 mA while maintaining ≤0.3 V low-level voltage, satisfying TTL and CMOS input requirements. For bidirectional µP reset lines (e.g., MC68HC11), a 4.7 kΩ series resistor is recommended to prevent contention.
ADM709SARZ-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:
- Active
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.93V
- 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
ADM709SARZ-REEL FAQ
1.How can I place an order for ADM709SARZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM709SARZ-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 ADM709SARZ-REEL reliable?
The price and inventory of ADM709SARZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM709SARZ-REEL is usually 5 days.
3.What payment methods are accepted for ADM709SARZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM709SARZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM709SARZ-REEL?
ADM709SARZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM709SARZ-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 ADM709SARZ-REEL?
For technical support, including ADM709SARZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM709SARZ-REEL requirements.
6.How does Aetrix verify that ADM709SARZ-REEL is sourced from the original manufacturer or authorized distributors?
All ADM709SARZ-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 ADM709SARZ-REEL meets industry standards.
7.What is the process for return or replacement of ADM709SARZ-REEL?
All ADM709SARZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with ADM709SARZ-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 ADM709SARZ-REEL part is unused and in its original packaging.
Return procedure for ADM709SARZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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