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Analog Devices Inc. ADM709MARZ-REEL
- Part No.:
- ADM709MARZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADM709MARZ-REEL.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,276
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Product details
Overview
ADM709MARZ-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 in microprocessor systems to ensure reliable startup and brownout protection.
For engineers reviewing the ADM709MARZ-REEL datasheet, ADM709MARZ-REEL pinout, ADM709MARZ-REEL application, or ADM709MARZ-REEL equivalent, key selection criteria include reset threshold accuracy, guaranteed RESET timing at low VCC, SOIC-8 package compatibility, and quiescent current under industrial temperature range (–40°C to +85°C).
Technical Context
The ADM709MARZ-REEL implements a voltage comparator-based reset generator with internal 140 ms timeout timer, ensuring RESET remains asserted during VCC rise until stable operation is confirmed. It features glitch immunity on VCC and guarantees functional RESET output down to 1 V supply.
Its reset threshold is fixed at 4.40 V (±0.15 V), optimized for +5 V microprocessor systems, and it drives an open-drain or push-pull compatible active-low RESET signal with sink capability up to 3.2 mA at VCC ≥ threshold min.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.40 V ±0.15 V - ensures reliable reset assertion for +5 V systems before undervoltage lockout. |
| Power-On Reset Pulse | 140 ms (min) - provides sufficient stabilization time for microprocessors after VCC exceeds threshold. |
| VCC Operating Range | 1.0 V to 5.5 V - enables valid RESET assertion even during deep brownout or partial power loss. |
| Supply Current | 35 µA (typ) at VCC < 3.6 V - ultra-low quiescent draw supports battery-backed or energy-sensitive designs. |
| RESET Sink Current | 3.2 mA at VCC ≥ threshold min - directly drives standard µP reset inputs without external buffer. |
| Operating Temperature | –40°C to +85°C - qualified for industrial embedded and automotive control environments. |
| Package | SOIC-8 (SO-8) - surface-mount footprint compatible with automated PCB assembly and thermal profile requirements. |
Pinout & Package
ADM709MARZ-REEL is housed in an 8-pin SOIC (SO-8) package with standard JEDEC outline, 1.27 mm pitch, and exposed pad not present. Pin 1 is marked by notch or dot; 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 |
|---|---|---|
| Pin 1, 4, 5, 6, 8 | No Connect | Internally unconnected; must remain floating or grounded per layout best practice-no routing required. |
| Pin 2 (VCC) | Power Supply Input | Accepts 1.0 V–5.5 V; powers internal comparator and timer; requires local 0.1 µF decoupling. |
| Pin 3 (GND) | Ground Reference | 0 V reference for threshold detection and RESET output; must tie to system ground plane with low-inductance path. |
| Pin 7 (RESET) | Active-Low Reset Output | Open-drain–compatible logic output; sinks up to 3.2 mA; asserts low during power-up, brownout, or shutdown. |
Key Features
| Feature | Design Value |
|---|---|
| Precision 4.40 V threshold | ±0.15 V tolerance ensures consistent reset point across temperature and unit variance in +5 V systems. |
| 140 ms minimum reset pulse | Guarantees µP initialization completes before release-even with slow-rising or noisy VCC rails. |
| Operation down to 1 V VCC | Enables fail-safe reset hold during deep brownout, preventing undefined µP state below typical LDO dropout. |
| Glitch-immune VCC sensing | Rejects transients ≤20 µs, eliminating spurious resets from switching noise or load dump events. |
| SOIC-8 industrial packaging | RoHS-compliant, tape-and-reel (REEL) format supports high-volume SMT manufacturing and reflow profiles. |
Applications
| Industrial PLC Controllers | Medical Diagnostic Equipment |
|---|---|
Use Scenario: Power sequencing and fault recovery in programmable logic controllers operating in factory-floor environments with fluctuating 24 V DC supplies stepped to +5 V. IC Role / Device Role / Timing Role: System-level power supervisor that asserts RESET during input undervoltage, line transients, or hot-swap events. Use Value: Prevents firmware corruption and I/O latch-up by holding µP in reset until regulated +5 V rail stabilizes for ≥140 ms. | Use Scenario: Ensuring deterministic boot behavior in portable ultrasound or patient monitor units powered by Li-ion batteries with aging voltage profiles. IC Role / Device Role / Timing Role: Brownout detector and power-on reset generator interfaced to ARM Cortex-M4 host MCU. Use Value: Maintains RESET assertion down to 1 V VCC, enabling safe shutdown before battery cutoff and avoiding memory write errors. |
| Automotive Body Control Modules | Networked Industrial Sensors |
Use Scenario: Cold-cranking and load-dump resilience in BCMs where 12 V battery dips to 3–4 V during engine start. IC Role / Device Role / Timing Role: Voltage monitor with glitch immunity that prevents false resets during cranking-induced VCC sags. Use Value: Uses internal filtering to ignore sub-20 µs transients while asserting RESET if VCC drops below 4.40 V for >100 µs. | Use Scenario: Remote field sensors powered via 24 V loop supply with local LDO regulation to +5 V, subject to EMI and cable-induced ripple. IC Role / Device Role / Timing Role: Primary reset source for low-power MSP430 or STM32 microcontrollers in IP67-rated enclosures. Use Value: 35 µA quiescent current minimizes standby drain; SOIC-8 footprint allows compact PCB layout near µP reset pin. |
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 | Same 4.40 V threshold, but 200 ms typ reset timeout; higher 100 µA max supply current; requires external capacitor for adjustable timeout. | Designed for legacy Maxim systems with capacitor-programmable timing; less suitable for space-constrained layouts needing fixed 140 ms. | Select MAX709SUR+T only if adjustable timeout or second-source qualification for Maxim-based BOMs is required. |
| TPS3808G33DBVR | 3.3 V threshold (not 4.40 V); 200 ms fixed timeout; 1.1 µA quiescent current; supports manual reset input and watchdog. | Optimized for +3.3 V domains; adds watchdog and manual reset-over-spec'd for simple +5 V reset-only use cases. | Choose TPS3808G33DBVR only when system requires multi-function supervision (watchdog + manual reset) at 3.3 V, not for direct ADM709MARZ-REEL replacement. |
Compared with MAX709SUR+T and TPS3808G33DBVR, the ADM709MARZ-REEL delivers tighter threshold tolerance (±0.15 V vs. ±0.25 V), lower supply current at low VCC, and fixed 140 ms timing ideal for cost-sensitive +5 V microprocessor reset-without added complexity or mismatched voltage rating.
Availability
ADM709MARZ-REEL is available at Aetrix Electronics and suitable for industrial PLC controllers, medical diagnostic equipment, automotive body control modules, and networked industrial sensors requiring stable component supply over extended production lifecycles.
Supply support for ADM709MARZ-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' power supply supervisor product line, engineered specifically for deterministic reset generation in microprocessor-based systems operating across industrial and automotive temperature ranges.
FAQ
What is the exact reset threshold voltage of the ADM709MARZ-REEL?
The ADM709MARZ-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 industrial temperature range (–40°C to +85°C). This value is laser-trimmed at wafer test and does not require external calibration. The 'M' suffix in the part number explicitly denotes the 4.40 V variant per Analog Devices' ordering guide.
Does the ADM709MARZ-REEL support operation below 2.0 V VCC?
Yes, the ADM709MARZ-REEL guarantees functional RESET output down to 1.0 V VCC, as specified in the absolute maximum ratings and confirmed in the "RESET at Voltages < 1 V" circuit note. Below 1 V, a 100 kΩ pull-down resistor is recommended to maintain low state integrity, but the device itself remains operational and asserts RESET correctly above 1 V.
Is the ADM709MARZ-REEL pin-compatible with the MAX709 series?
The ADM709MARZ-REEL shares identical SOIC-8 pinout and functional assignment (VCC, GND, RESET, NCs) with the MAX709 family, including same pin numbers and electrical behavior. However, it is not a drop-in replacement due to differences in reset timeout (140 ms min vs. 200 ms typ for MAX709) and supply current profile-board-level validation is required before substitution.
What is the RESET output drive capability of the ADM709MARZ-REEL?
The ADM709MARZ-REEL RESET pin sinks up to 3.2 mA when VCC is at its minimum threshold (4.25 V), meeting standard TTL/CMOS µP reset input requirements. Its VOL is 0.4 V max under this condition, ensuring solid logic-low assertion. It also supports weak pull-up configurations via external resistors for bidirectional µP interfaces, as documented in Figure 6 of the datasheet.
Can the ADM709MARZ-REEL be used in automotive applications?
Yes-the ADM709MARZ-REEL is rated for –40°C to +85°C operation and exhibits proven glitch immunity against fast transients, making it suitable for non-safety-critical automotive body electronics such as lighting controllers and HVAC modules. It is not AEC-Q200 qualified, so design-in for safety-related systems requires additional qualification testing per OEM requirements.
ADM709MARZ-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:
- 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
ADM709MARZ-REEL FAQ
1.How can I place an order for ADM709MARZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM709MARZ-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 ADM709MARZ-REEL reliable?
The price and inventory of ADM709MARZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM709MARZ-REEL is usually 5 days.
3.What payment methods are accepted for ADM709MARZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM709MARZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM709MARZ-REEL?
ADM709MARZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM709MARZ-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 ADM709MARZ-REEL?
For technical support, including ADM709MARZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM709MARZ-REEL requirements.
6.How does Aetrix verify that ADM709MARZ-REEL is sourced from the original manufacturer or authorized distributors?
All ADM709MARZ-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 ADM709MARZ-REEL meets industry standards.
7.What is the process for return or replacement of ADM709MARZ-REEL?
All ADM709MARZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with ADM709MARZ-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 ADM709MARZ-REEL part is unused and in its original packaging.
Return procedure for ADM709MARZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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