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Analog Devices Inc. ADM8699ARN-REEL
- Part No.:
- ADM8699ARN-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADM8699ARN-REEL.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,399
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Product details
Overview
ADM8699ARN-REEL from Analog Devices is a microprocessor supervisory circuit with integrated watchdog timer, precision 4.65 V voltage monitor, guaranteed RESET assertion down to VCC = 1 V, 140–280 ms reset pulse width, and 1.0–2.25 s watchdog timeout. It monitors 5 V power supplies in embedded controllers and industrial microprocessor systems requiring reliable brown-out detection and software fault recovery.
For engineers reviewing the ADM8699ARN-REEL datasheet, ADM8699ARN-REEL pinout, ADM8699ARN-REEL application, or ADM8699ARN-REEL equivalent, key selection criteria include its guaranteed low-VCC reset functionality, watchdog input (WDI) transition sensitivity, SOIC-8 package compatibility, and absence of WDO output in 8-pin variants-critical for legacy board space-constrained designs.
Technical Context
The ADM8699ARN-REEL implements a precision bandgap-based voltage detector with 40 mV hysteresis and a monostable power-on reset generator ensuring ≥140 ms RESET assertion after VCC crosses 4.65 V. Its watchdog transition detector responds to any high-to-low or low-to-high edge on WDI, resetting the 1.6 s typical timeout period on each toggle.
Unlike the ADM8698, the ADM8699ARN-REEL adds active watchdog supervision: if WDI remains static beyond timeout, RESET pulses low and-unlike the 16-lead SOIC version-no WDO output is provided in the R-8 package. The device operates across –40°C to +85°C and draws only 70 µA typical supply current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Operating Range | 3.0 V to 5.5 V - supports nominal 5 V systems with ±10% tolerance and brown-out margin down to 3 V. |
| Reset Threshold | 4.65 V typ (4.5–4.75 V) - set for 5 V ±5% supply monitoring with built-in hysteresis to reject noise. |
| RESET Active Time | 140–280 ms - ensures stable microprocessor initialization after power-up or brown-out recovery. |
| Watchdog Timeout | 1.0–2.25 s - provides robust software execution verification without requiring external timing components. |
| Supply Current | 70 µA typ - enables low-power operation in battery-backed or energy-sensitive embedded systems. |
| Min VCC for RESET | 1 V - guarantees functional reset hold during deep undervoltage conditions, preventing processor runaway. |
| WDI Input Threshold | Logic low ≤0.8 V, logic high ≥3.5 V - compatible with TTL/CMOS I/O levels on microcontroller GPIO pins. |
Pinout & Package
ADM8699ARN-REEL is housed in an 8-pin SOIC (R-8) package per Analog Devices ordering guide. Pin 1 is marked, and the package has standard JEDEC MS-012AC dimensions (width 3.9 mm, length 4.9 mm, height 1.75 mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | +5 V power supply input; monitored by internal voltage detector and powers internal logic. |
| 2 | GND | Ground reference for all analog and digital functions; must be low-impedance connection. |
| 3 | WDI* | Watchdog input; three-level (low/mid/high); toggling resets 1.6 s timeout; floating disables watchdog. |
| 4 | NC | No connect - internally unconnected; must remain unconnected per datasheet. |
| 5 | RESET | Active-low open-drain reset output; sinks ≥3.2 mA at 0.4 V; asserted when VCC < 4.65 V or WDI timeout occurs. |
| 6 | NC | No connect - internally unconnected; must remain unconnected per datasheet. |
| 7 | NC | No connect - internally unconnected; must remain unconnected per datasheet. |
| 8 | GND | Second ground pin - improves noise immunity and thermal dissipation in SOIC-8 layout. |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed RESET at VCC = 1 V | Ensures deterministic microprocessor shutdown even during severe undervoltage events, eliminating race conditions. |
| 40 mV Reset Threshold Hysteresis | Prevents false resets caused by power supply ripple or transient noise near the 4.65 V trip point. |
| Watchdog Transition Detection | Responds to any WDI edge (not level), enabling flexible software polling or hardware-generated toggles. |
| Low 70 µA Supply Current | Reduces system standby power and eases thermal design in sealed or fanless enclosures. |
| Industrial Temperature Range | Rated for –40°C to +85°C operation, supporting deployment in automotive ECUs and factory automation hardware. |
Applications
| Industrial PLC Controller | Automotive Body Control Module |
|---|---|
Use Scenario: Microcontroller in a programmable logic controller experiences intermittent firmware hangs due to EMI-induced memory corruption. IC Role / Device Role / Timing Role: ADM8699ARN-REEL monitors VCC stability and watches WDI toggled by a dedicated watchdog task; asserts RESET on timeout or brown-out. Use Value: Restores deterministic system state within 280 ms, avoiding manual intervention and maintaining process continuity in 24/7 operation. |
Use Scenario: A body control unit (BCU) must survive cold-cranking events where battery voltage dips below 4.5 V for >100 ms. IC Role / Device Role / Timing Role: ADM8699ARN-REEL holds MCU in reset until VCC recovers above 4.65 V and remains stable for ≥140 ms, then releases reset. Use Value: Prevents partial initialization and undefined peripheral states during engine start, improving ASIL-B compliance readiness. |
| Medical Infusion Pump | Smart Energy Meter |
Use Scenario: Safety-critical infusion pump firmware requires fail-safe restart if main CPU locks during dose calculation. IC Role / Device Role / Timing Role: ADM8699ARN-REEL receives periodic WDI toggles from a hardware timer-driven ISR; triggers RESET if missed for >2.25 s. Use Value: Enforces hard real-time recovery independent of software scheduler latency or interrupt masking. |
Use Scenario: Utility meter operates on backup capacitor during mains outage and must retain RTC integrity while detecting power restoration. IC Role / Device Role / Timing Role: ADM8699ARN-REEL asserts RESET during brown-out (VCC < 4.65 V), holding MCU in known state until stable 5 V returns. Use Value: Eliminates EEPROM write corruption risk and ensures accurate timekeeping resumption post-outage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX699ESA+ | 4.65 V threshold, no watchdog; 200 ms reset timeout; SOIC-8; max 10 µA quiescent current. | Lacks WDI supervision - suitable only where software reliability is ensured externally or via dual-core lockstep. | Select when lowest power is critical and watchdog functionality is implemented in firmware or companion IC. |
| TPS3808G33DBVR | 3.3 V threshold (not 4.65 V); adjustable delay; 1.8–6 V VCC range; 2.5 µA IQ; SOT-23-6. | Designed for 3.3 V systems; requires external RC for delay tuning; no native WDI input. | Choose for modern low-voltage MCUs but requires redesign of reset timing and voltage monitoring architecture. |
Compared with MAX699ESA+ and TPS3808G33DBVR, the ADM8699ARN-REEL uniquely combines 5 V-specific 4.65 V monitoring, guaranteed 1 V reset hold, and integrated edge-triggered watchdog in a drop-in SOIC-8 footprint-making it irreplaceable for legacy 5 V microcontroller designs needing certified fail-safe behavior.
Availability
ADM8699ARN-REEL is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, medical infusion pumps, and smart energy meters requiring stable component supply, long-term lifecycle support, and guaranteed parametric consistency across production lots.
Supply support for ADM8699ARN-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, serving industrial, communications, automotive, and healthcare markets since 1965.
The ADM8698/ADM8699 family was designed specifically for robust, single-chip power monitoring and watchdog supervision in 5 V microprocessor systems-emphasizing fail-safe reset assertion, low-voltage operability, and minimal external component count.
FAQ
Does ADM8699ARN-REEL provide a watchdog output (WDO) signal?
No, ADM8699ARN-REEL does not provide a WDO output. Per the datasheet pin configuration for the 8-pin SOIC (R-8) package, WDO is only available on the 16-lead SOIC variant (ADM8699ARW). The ADM8699ARN-REEL includes only VCC, GND, WDI, RESET, and NC pins-no WDO terminal is present or functional in this package.
What is the minimum VCC required for ADM8699ARN-REEL to assert RESET reliably?
The ADM8699ARN-REEL guarantees RESET assertion down to VCC = 1 V, with RESET output voltage specified at 12–200 mV (ISINK = 100 µA) under that condition. This ensures the microprocessor remains held in a valid reset state even during deep brown-out events, a key differentiator versus competitors with higher minimum operating voltage requirements.
Can the watchdog timer in ADM8699ARN-REEL be disabled?
Yes, the watchdog timer in ADM8699ARN-REEL can be disabled by leaving the WDI pin floating or driving it to midsupply (~2.5 V). The datasheet explicitly states the watchdog is disabled under those conditions, allowing the device to function as a pure voltage supervisor identical to the ADM8698ARN-REEL-without requiring hardware changes.
Is ADM8699ARN-REEL pin-compatible with ADM8698ARN-REEL?
Yes, ADM8699ARN-REEL and ADM8698ARN-REEL share identical 8-pin SOIC (R-8) pinouts and reset functionality. The only difference is the addition of WDI on Pin 3 of ADM8699ARN-REEL; on ADM8698ARN-REEL, Pin 3 is NC. This allows direct substitution where watchdog supervision is added without PCB modification.
What is the recommended bypass capacitor for ADM8699ARN-REEL VCC pin?
Analog Devices recommends a 0.1 µF ceramic capacitor placed as close as possible to the VCC and GND pins of ADM8699ARN-REEL. This minimizes high-frequency noise coupling into the voltage detector and prevents mistriggering of RESET during transient events-especially critical in electrically noisy environments like motor drives or automotive power systems.
ADM8699ARN-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:
- 4.65V
- 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
ADM8699ARN-REEL FAQ
1.How can I place an order for ADM8699ARN-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM8699ARN-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 ADM8699ARN-REEL reliable?
The price and inventory of ADM8699ARN-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM8699ARN-REEL is usually 5 days.
3.What payment methods are accepted for ADM8699ARN-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM8699ARN-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM8699ARN-REEL?
ADM8699ARN-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM8699ARN-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 ADM8699ARN-REEL?
For technical support, including ADM8699ARN-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM8699ARN-REEL requirements.
6.How does Aetrix verify that ADM8699ARN-REEL is sourced from the original manufacturer or authorized distributors?
All ADM8699ARN-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 ADM8699ARN-REEL meets industry standards.
7.What is the process for return or replacement of ADM8699ARN-REEL?
All ADM8699ARN-REEL units undergo pre-shipment inspection (PSI). If there is an issue with ADM8699ARN-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 ADM8699ARN-REEL part is unused and in its original packaging.
Return procedure for ADM8699ARN-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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