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Analog Devices Inc. ADM709TARZ-REEL
- Part No.:
- ADM709TARZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADM709TARZ-REEL.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,672
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Product details
Overview
ADM709TARZ-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 embedded systems with +3.3 V or +3 V rails.
For engineers reviewing the ADM709TARZ-REEL datasheet, ADM709TARZ-REEL pinout, ADM709TARZ-REEL application, or ADM709TARZ-REEL equivalent, key selection factors include reset threshold accuracy, guaranteed low-voltage RESET operation, glitch immunity, SOIC-8 package compatibility, and direct upgrade path from MAX709-series supervisory circuits.
Technical Context
The ADM709TARZ-REEL integrates a precision voltage comparator and internal timer to generate a clean, debounced active-low RESET signal during power-up, brownout, and power-down events. Its reset threshold is fixed at 3.08 V (±75 mV), optimized for +3.3 V and +3 V logic supplies.
VCC-to-RESET delay is under 20 µs, and RESET remains asserted for 140–380 ms after VCC rises above threshold; the output drives up to 1.2 mA sink current while maintaining <0.3 V low-level voltage, and operates continuously down to VCC = 1.0 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08 V ±75 mV - precisely matches +3.3 V and +3 V rail monitoring requirements |
| Power-On Reset Pulse | 140 ms min - ensures stable microprocessor initialization after power stabilization |
| VCC Operating Range | 1.0 V to 5.5 V - enables valid RESET assertion even during deep brownout |
| Supply Current | 35 µA typ at VCC < 3.6 V - ultra-low quiescent draw for battery-backed or low-power systems |
| RESET Output Sink | 1.2 mA @ 0.3 V max - directly interfaces standard CMOS/TTL microprocessor reset inputs |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded and automotive control environments |
| Package | SOIC-8 (SO-8) - surface-mount compatible with standard PCB assembly processes |
Pinout & Package
ADM709TARZ-REEL is housed in an 8-pin SOIC (SO-8) package with gull-wing leads, 1.27 mm pitch, and JEDEC MS-012AC compliance. Pin 1 is marked by a beveled corner or dot; pins 1, 4, 5, 6, and 8 are no-connect (NC).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 2) | Power supply input | Accepts 1.0–5.5 V; powers internal comparator and timer; must be decoupled near pin |
| GND (Pin 3) | Ground reference | 0 V return for all internal circuitry; requires low-impedance connection to system ground plane |
| RESET (Pin 7) | Active-low reset output | Open-drain compatible; sinks 1.2 mA; asserts low during brownout and for ≥140 ms on power-up |
| NC (Pins 1, 4, 5, 6, 8) | No electrical connection | Must remain unconnected; no routing or soldering required; no internal function |
Key Features
| Feature | Design Value |
|---|---|
| Precision 3.08 V threshold | Enables accurate supervision of +3.3 V and +3 V rails without external resistive dividers |
| 140 ms minimum reset timeout | Guarantees sufficient time for microprocessor core, PLLs, and memory to stabilize post-power-up |
| Operation down to 1.0 V VCC | Maintains valid RESET assertion through deep undervoltage conditions, preventing runaway states |
| Glitch-immune VCC sensing | Rejects short-duration transients on supply line, eliminating spurious resets in noisy environments |
| SOIC-8 footprint | Direct drop-in replacement for legacy MAX709T and other 8-pin supervisory ICs in existing layouts |
Applications
| Industrial PLC Controllers | Medical Diagnostic Handhelds |
|---|---|
Use Scenario: Power sequencing and brownout recovery in programmable logic controllers with dual 3.3 V/5 V domains. IC Role / Device Role / Timing Role: Supervisory IC generating active-low reset signal synchronized to 3.3 V rail stability. Use Value: Prevents firmware corruption during factory-floor voltage sags using guaranteed 140 ms reset hold time and 3.08 V threshold. | Use Scenario: Battery-powered portable ultrasound units requiring fail-safe boot integrity across charge cycles. IC Role / Device Role / Timing Role: Low-voltage supervisor asserting RESET until main 3.3 V LDO reaches regulation. Use Value: Ensures CPU remains held in reset down to 1.0 V VCC, avoiding undefined state during Li-ion discharge below 3.0 V. |
| Automotive Body Control Modules | Smart Energy Meters |
Use Scenario: Cold-cranking and load-dump resilience in BCMs powered from 12 V automotive bus via 3.3 V DC/DC. IC Role / Device Role / Timing Role: Voltage monitor triggering hardware reset when 3.3 V rail drops below 3.08 V during cranking. Use Value: Eliminates need for external RC timing network; built-in 140 ms delay replaces discrete solutions with tighter tolerance. | Use Scenario: Tamper-resistant metering ICs operating from split-phase AC-derived 3.3 V supply with intermittent dropout. IC Role / Device Role / Timing Role: Brownout detector holding microcontroller in reset during zero-crossing gaps or transformer saturation. Use Value: Glitch-immune sensing prevents false resets from switching noise on isolated 3.3 V rail, improving field reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar power-supply monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX709TCSA+ | Same 3.08 V threshold, 200 ms reset timeout, but higher 50 µA typical supply current and no 1 V operation guarantee | Limited to >2.0 V VCC operation; less suitable for deep-brownout scenarios | Prefer ADM709TARZ-REEL where sub-2 V reset validity or ultra-low IQ is required |
| TPS3808G30DBVR | 3.0 V threshold (±0.5%), adjustable reset delay (1.25 ms to 10 s), 1.4 µA IQ, but requires external capacitor for timing | Offers programmability at cost of BOM count and layout area; lacks guaranteed 1 V operation | Choose ADM709TARZ-REEL for fixed-timing simplicity, proven SOIC-8 drop-in use, and robust low-VCC behavior |
Compared with MAX709TCSA+ and TPS3808G30DBVR, ADM709TARZ-REEL delivers tighter threshold tolerance (±2.4% vs ±3.3%), lower quiescent current at 3.3 V rails, and unique guaranteed RESET functionality down to 1.0 V-making it optimal for safety-critical brownout recovery where minimal component count and deterministic timing are essential.
Availability
ADM709TARZ-REEL is available at Aetrix Electronics and suitable for industrial PLC controllers, medical handheld diagnostics, automotive body control modules, and smart energy meters requiring stable component supply and long-term lifecycle support.
Supply support for ADM709TARZ-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 Wilmington, MA.
The ADM709 belongs to Analog Devices' supervisory IC product line, designed specifically for reliable power-on reset, brownout detection, and microprocessor supervision in industrial, automotive, and medical systems.
FAQ
What is the exact reset threshold voltage of the ADM709TARZ-REEL?
The ADM709TARZ-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 components, making it ideal for precise +3.3 V and +3 V rail monitoring without resistor networks.
Does the ADM709TARZ-REEL support operation below 2.0 V VCC?
Yes, the ADM709TARZ-REEL guarantees functional RESET output down to VCC = 1.0 V. Its internal circuitry remains active and asserts RESET low throughout this range, unlike many competing supervisors that cease operation below 2.0 V. This ensures fail-safe microprocessor hold during deep brownouts.
What is the power-on reset timeout duration for the ADM709TARZ-REEL?
The ADM709TARZ-REEL provides a minimum power-on reset timeout of 140 ms after VCC rises above the 3.08 V threshold. The typical duration is 280 ms, and maximum is 380 ms. This fixed internal timer eliminates the need for external RC networks and ensures consistent reset timing across temperature and voltage.
Can the ADM709TARZ-REEL replace the MAX709T in existing designs?
Yes, the ADM709TARZ-REEL is a direct functional and pin-compatible upgrade for the MAX709T in SOIC-8 packages. It shares identical pinout, 3.08 V threshold, and active-low open-drain RESET output, while offering improved specifications including lower quiescent current (35 µA vs 50 µA) and guaranteed 1 V operation.
Is external capacitance required for stable operation of the ADM709TARZ-REEL?
No external capacitance is required for basic operation of the ADM709TARZ-REEL. However, a 0.1 µF ceramic capacitor placed as close as possible to the VCC pin improves glitch immunity against fast transients on the supply rail-recommended for noisy industrial or automotive environments per Analog Devices' application guidance.
ADM709TARZ-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:
- 3.08V
- 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
ADM709TARZ-REEL FAQ
1.How can I place an order for ADM709TARZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM709TARZ-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 ADM709TARZ-REEL reliable?
The price and inventory of ADM709TARZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM709TARZ-REEL is usually 5 days.
3.What payment methods are accepted for ADM709TARZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM709TARZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM709TARZ-REEL?
ADM709TARZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM709TARZ-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 ADM709TARZ-REEL?
For technical support, including ADM709TARZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM709TARZ-REEL requirements.
6.How does Aetrix verify that ADM709TARZ-REEL is sourced from the original manufacturer or authorized distributors?
All ADM709TARZ-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 ADM709TARZ-REEL meets industry standards.
7.What is the process for return or replacement of ADM709TARZ-REEL?
All ADM709TARZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with ADM709TARZ-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 ADM709TARZ-REEL part is unused and in its original packaging.
Return procedure for ADM709TARZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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