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Analog Devices Inc. ADM709MAN
- Part No.:
- ADM709MAN
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
ADM709MAN.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,733
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Product details
Overview
ADM709MAN 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 for reliable microprocessor reset in industrial embedded systems requiring stable brownout detection.
For engineers reviewing the ADM709MAN datasheet, ADM709MAN pinout, ADM709MAN application, or ADM709MAN equivalent, key selection criteria include reset threshold accuracy (±0.15 V), guaranteed RESET functionality at VCC ≥ 1 V, 35 µA typical quiescent current, and compatibility with +5 V / +3.3 V / +3 V supply rails.
Technical Context
The ADM709MAN 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 4.40 V 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 V supply, and output sink capability is 3.2 mA at 0.4 V max low-level voltage - enabling direct interface with standard µP reset inputs without external buffering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.40 V ±0.15 V - precisely monitors +5 V or +3.3 V supplies for brownout detection |
| Power-On Reset Pulse | ≥140 ms - ensures microprocessor stabilization after power-up |
| VCC Operating Range | 1.0 V to 5.5 V - supports valid RESET assertion during deep brownout and full rail operation |
| Quiescent Current | 35 µA typical - enables ultra-low-power system monitoring |
| RESET Output Sink | 3.2 mA @ 0.4 V max - directly drives standard TTL/CMOS µP reset inputs |
| Operating Temperature | –40°C to +85°C - qualified for industrial environment deployment |
| Glitch Immunity | Immune to short VCC transients - prevents spurious resets from power supply noise |
Pinout & Package
ADM709MAN is housed in an 8-pin plastic DIP (N-8) package with 0.3 inch width and through-hole mounting. Pin 1 is index-marked; pins 1, 4, 5, 6, and 8 are no-connect; only VCC (Pin 2), GND (Pin 3), and RESET (Pin 7) are functional.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 2) | Supply Input | Accepts 1.0 V to 5.5 V; powers internal monitor and timer |
| GND (Pin 3) | Ground Reference | 0 V reference for threshold comparison and output logic |
| RESET (Pin 7) | Active-Low Reset Output | Open-drain compatible; sinks 3.2 mA; held low during brownout and for ≥140 ms post-power-up |
| NC (Pins 1,4,5,6,8) | No Connect | Not bonded; must remain unconnected per design |
Key Features
| Feature | Design Value |
|---|---|
| Precision 4.40 V threshold | Enables accurate monitoring of +5 V and +3.3 V rails without external resistive dividers |
| 140 ms min power-on reset | Guarantees µP initialization time exceeds oscillator start-up and memory settling delays |
| Operation down to 1 V VCC | Maintains controlled reset assertion during severe brownout or battery sag conditions |
| Glitch-immune VCC sensing | Rejects sub-20 µs supply transients - eliminates false resets in noisy environments |
| Upgrade path from MAX709 | Pin-compatible replacement with improved threshold accuracy and lower quiescent current |
Applications
| Industrial PLC Controllers | Embedded Data Acquisition Systems |
|---|---|
Use Scenario: Power cycling and brownout events in factory-floor automation cabinets. IC Role / Device Role / Timing Role: System-level reset supervisor ensuring deterministic µP restart after AC line dips. Use Value: Prevents corrupted I/O state or firmware lockup by enforcing ≥140 ms reset hold time during unstable VCC recovery. | Use Scenario: Battery-backed sensor nodes operating on 3.3 V rails with intermittent solar charging. IC Role / Device Role / Timing Role: Low-voltage brownout detector with 1 V operational floor. Use Value: Maintains valid RESET assertion even as battery voltage drops to 1.0 V, avoiding undefined µP behavior. |
| Medical Diagnostic Instrumentation | Automotive Body Control Modules |
Use Scenario: Cold-start and ignition transient conditions in portable ultrasound units. IC Role / Device Role / Timing Role: Precision supply monitor for 5 V analog front-end and digital controller rails. Use Value: 4.40 V threshold aligns with +5 V LDO tolerance limits, preventing premature release of reset during marginal startup. | Use Scenario: 12 V automotive system with 5 V/3.3 V DC-DC conversion and load-dump transients. IC Role / Device Role / Timing Role: Glitch-immune reset generator interfacing to MCU with bidirectional reset pin. Use Value: Internal immunity plus optional 0.1 µF VCC bypass eliminates need for external RC filtering on reset line. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar power supply monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX709MCPA+ | 4.40 V threshold, 200 ms reset timeout, 10 µA higher quiescent current, SO-8 only | Same industrial temperature range but no N-8 DIP option; requires PCB redesign if through-hole mounting needed | Select for SO-8 footprint compatibility where MAX709 legacy designs exist |
| TPS3808G33DBVR | 3.3 V threshold (not 4.40 V), adjustable delay, 1.5 µA quiescent current, SOT-23-5 | Lower threshold and different package - suitable only for 3.3 V-only systems needing ultra-low IQ | Select only when redesigning for 3.3 V rail monitoring and surface-mount constraints apply |
Compared with MAX709MCPA+, ADM709MAN offers identical threshold and industrial temp rating but in N-8 DIP for through-hole reliability; versus TPS3808G33DBVR, it provides higher 4.40 V threshold and proven brownout response in legacy industrial layouts.
Availability
ADM709MAN is available at Aetrix Electronics and suitable for industrial PLC controllers, embedded data acquisition systems, medical diagnostic instrumentation, and automotive body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ADM709MAN 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, headquartered in Norwood, MA.
The ADM709 belongs to Analog Devices' precision power supply supervisor product line, designed specifically for deterministic microprocessor reset generation in industrial, medical, and automotive systems with strict brownout and startup timing requirements.
FAQ
What is the exact reset threshold voltage of the ADM709MAN?
The ADM709MAN has a nominal reset threshold of 4.40 V, with a guaranteed range of 4.25 V to 4.50 V over the full –40°C to +85°C temperature range. This value is laser-trimmed at wafer test and applies specifically to the "M" suffix variant, as confirmed in the ADM709 ordering guide and electrical specifications table.
Does the ADM709MAN support operation below 1 V supply voltage?
No - the ADM709MAN RESET output is guaranteed functional down to 1.0 V VCC only. Below 1 V, RESET behavior is not specified; if sustained low-state assertion is required below 1 V, a 100 kΩ pull-down resistor between RESET and GND is recommended per the datasheet Figure 5 circuit.
Is the ADM709MAN pin-compatible with the MAX709 series?
Yes - the ADM709MAN is a direct upgrade for the MAX709M in 8-pin DIP (N-8) packages. Pin functions (VCC, GND, RESET) and no-connect assignments match exactly, and both share identical 4.40 V threshold and industrial temperature range, enabling drop-in replacement without layout changes.
What is the minimum power-on reset pulse width for the ADM709MAN?
The ADM709MAN guarantees a minimum power-on reset pulse width of 140 ms after VCC rises above the 4.40 V threshold. The typical duration is 280 ms, and maximum is 380 ms - all measured under full operating conditions (–40°C to +85°C, VCC = reset threshold max).
Can the ADM709MAN drive a microcontroller reset pin directly?
Yes - the ADM709MAN RESET output can directly drive standard microcontroller reset inputs. It sinks up to 3.2 mA while maintaining ≤0.4 V low-level voltage, meeting TTL and most CMOS input requirements. For bidirectional µP reset lines (e.g., MC68HC11), a 4.7 kΩ series resistor is recommended per Figure 6.
ADM709MAN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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:
- Through Hole
- Supplier Device Package:
- 8-PDIP
ADM709MAN FAQ
1.How can I place an order for ADM709MAN through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM709MAN 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 ADM709MAN reliable?
The price and inventory of ADM709MAN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM709MAN is usually 5 days.
3.What payment methods are accepted for ADM709MAN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM709MAN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM709MAN?
ADM709MAN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM709MAN 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 ADM709MAN?
For technical support, including ADM709MAN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM709MAN requirements.
6.How does Aetrix verify that ADM709MAN is sourced from the original manufacturer or authorized distributors?
All ADM709MAN 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 ADM709MAN meets industry standards.
7.What is the process for return or replacement of ADM709MAN?
All ADM709MAN units undergo pre-shipment inspection (PSI). If there is an issue with ADM709MAN, 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 ADM709MAN part is unused and in its original packaging.
Return procedure for ADM709MAN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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