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Analog Devices Inc. ADM706PARZ-REEL
- Part No.:
- ADM706PARZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADM706PARZ-REEL.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,992
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Product details
Overview
ADM706PARZ-REEL from Analog Devices is a 3 V microprocessor supervisory circuit with active-low reset output, 2.63 V reset threshold, 200 ms reset pulse width, 100 µA quiescent current, and integrated watchdog timer-designed for reliable power-up, brownout, and software fault monitoring in embedded microcontroller systems.
For engineers reviewing the ADM706PARZ-REEL datasheet, ADM706PARZ-REEL pinout, ADM706PARZ-REEL application, or ADM706PARZ-REEL equivalent, this device delivers guaranteed RESET validity down to 1 V VCC, debounced manual reset (MR), power-fail warning via PFI/PFO, and precise voltage supervision for 3 V supply rails in industrial and portable electronics.
Technical Context
The ADM706PARZ-REEL implements a precision bandgap-based voltage reference (2.63 V) for reset assertion, a 1.6 sec watchdog timer cleared by WDI transitions, and a separate 1.25 V power-fail comparator with PFI input and open-drain PFO output. Its internal 70 µA MR pull-up enables direct switch interfacing without external biasing.
Reset generation is synchronized to VCC monitoring and MR assertion, with 200 ms timeout enforced by an on-chip RC timer. The device maintains functional reset output down to VCC = 1 V, ensuring deterministic microprocessor hold during deep undervoltage conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.63 V ±40 mV - triggers reset when 3 V supply drops below safe operating level for microcontrollers. |
| Reset Pulse Width | 200 ms typical - provides sufficient time for microprocessor power stabilization and initialization after power-up or recovery. |
| Quiescent Current | 100 µA at VCC < 3.6 V - enables long battery life in portable and low-power systems. |
| Watchdog Timeout | 1.6 sec - detects software lockup by requiring periodic WDI toggling; resets WDO on any edge. |
| Power-Fail Threshold | 1.25 V on PFI - allows configurable early-warning detection of supply collapse using external resistor divider. |
| RESET Validity Range | Guaranteed down to VCC = 1 V - ensures microprocessor remains held in reset even during severe brownout. |
| MR Input Pull-Up | 70 µA typical - eliminates need for external pull-up resistor when interfacing with push-button switches. |
Pinout & Package
ADM706PARZ-REEL is housed in an 8-lead SOIC_N (R-8) package per JEDEC MS-012-AA, 3.9 mm × 4.9 mm body, 1.27 mm lead pitch, with gull-wing leads and 1.75 mm max height.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (MR) | Manual Reset Input | Debounced TTL/CMOS-compatible input; internally pulled up with 70 µA; asserts reset when driven below 0.6 V. |
| 2 (VCC) | Power Supply Input | Primary supply rail connection (2.7–5.5 V); requires 0.1 µF decoupling capacitor to GND for noise immunity. |
| 3 (GND) | Ground Reference | Common return path for all internal circuits and outputs; must be low-impedance connection to system ground plane. |
| 4 (PFI) | Power-Fail Input | Noninverting input to 1.25 V comparator; monitors auxiliary supply via resistive divider; connect to GND if unused. |
| 5 (PFO) | Power-Fail Output | Open-drain output that goes low when PFI < 1.25 V; used for early-warning interrupt or secondary reset trigger. |
| 6 (WDI) | Watchdog Input | Edge-sensitive input; any transition clears 1.6 sec watchdog timer; accepts pulses as narrow as 50 ns. |
| 7 (RESET) | Active-Low Reset Output | Push-pull output asserted low for 200 ms during power-up, brownout, or MR activation; valid down to VCC = 1 V. |
| 8 (WDO) | Watchdog Output | Open-drain output that goes low on watchdog timeout or VCC undervoltage; requires external pull-up for logic-level interface. |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed RESET operation at VCC = 1 V | Ensures microprocessor remains held in reset during deep brownout, preventing undefined state or corruption. |
| Internally debounced MR input with 70 µA pull-up | Eliminates external RC network and reduces BOM count; supports direct mechanical switch connection. |
| Dual-supervision capability (VCC + PFI) | Enables simultaneous monitoring of main 3 V rail and secondary supply (e.g., backup battery or analog rail). |
| Independent 1.6 sec watchdog timer | Provides fail-safe software health check without relying on reset line; WDO can drive NMI or be looped to MR. |
| 200 ms programmable reset pulse width | Matches typical microcontroller power-on reset timing requirements without external timing components. |
Applications
| Industrial PLC Controller | Portable Medical Monitor |
|---|---|
|
Use Scenario: Real-time control logic in factory automation systems subject to voltage sags and EMI-induced software faults. IC Role / Device Role / Timing Role: Supervisory IC providing power-on reset, brownout protection, and watchdog-triggered recovery. Use Value: Prevents spurious actuation of safety-critical outputs by guaranteeing clean reset assertion even at VCC = 1.2 V. |
Use Scenario: Battery-powered vital signs monitor requiring extended runtime and fault-tolerant boot sequence. IC Role / Device Role / Timing Role: Voltage supervisor enabling low-quiescent-current operation and early battery depletion warning via PFI. Use Value: 100 µA supply current extends battery life; PFO interrupt initiates graceful shutdown before data loss occurs. |
| Smart Energy Meter | Automotive Body Control Module |
|
Use Scenario: Revenue-grade meter with isolated MCU and tamper-detection circuitry operating from split-rail 3 V supply. IC Role / Device Role / Timing Role: Dual-threshold supervisor verifying both main and auxiliary rails before enabling metrology firmware. Use Value: PFI monitoring of backup supercapacitor rail ensures continuous timekeeping during AC mains failure. |
Use Scenario: In-vehicle lighting and window control unit exposed to load-dump and cold-crank transients. IC Role / Device Role / Timing Role: Robust reset generator maintaining valid RESET signal across 1 V–16 V VCC range during cranking. Use Value: Guaranteed RESET down to 1 V prevents MCU latch-up during engine start; WDO guards against firmware hang. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX706RCSA+T | Same 2.63 V reset threshold, 200 ms reset pulse, and SOIC-8 package; higher 120 µA quiescent current; no PFI/PFO function. | Lacks power-fail warning capability; suitable only where dual-supply monitoring is unnecessary. | Select MAX706RCSA+T only if PFI/PFO functionality is omitted from design and legacy MAX compatibility is required. |
| TPS3808G12DBVR | 2.63 V threshold and 200 ms delay, but uses adjustable watchdog (1.6 s default); 35 µA quiescent current; no PFI input. | Lower power consumption, but no dedicated power-fail comparator; requires external resistor for PFI-equivalent function. | Choose TPS3808G12DBVR for ultra-low-power designs where PFI is not needed and footprint compatibility is acceptable. |
Compared with ADM706PARZ-REEL, MAX706RCSA+T omits PFI/PFO and draws more current, while TPS3808G12DBVR achieves lower quiescent power but lacks integrated power-fail detection-making ADM706PARZ-REEL uniquely suited for dual-supply monitoring with guaranteed 1 V operation.
Availability
ADM706PARZ-REEL is available at Aetrix Electronics and suitable for industrial PLC controllers, portable medical monitors, smart energy meters, automotive body control modules, and battery-backed instrumentation requiring stable component supply across extended temperature ranges.
Supply support for ADM706PARZ-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, automotive, communications, and healthcare markets since 1965.
The ADM706 family was designed specifically for robust microprocessor supervision in harsh environments, emphasizing guaranteed reset validity at ultra-low VCC, integrated watchdog, and dual-supply monitoring capability.
FAQ
What is the reset threshold voltage of the ADM706PARZ-REEL?
The ADM706PARZ-REEL has a nominal reset threshold of 2.63 V, with a tolerance of ±40 mV (2.55 V to 2.70 V). This value is fixed and factory-trimmed, making it suitable for monitoring standard 3 V power rails. The threshold remains stable over temperature and supply variations, ensuring consistent reset behavior across industrial operating conditions from −40°C to +85°C.
Does the ADM706PARZ-REEL support both active-high and active-low reset outputs?
No, the ADM706PARZ-REEL provides only an active-low RESET output (Pin 7). It belongs to the ADM706R variant group, which differs from the ADM706P (active-high) and ADM708R (dual active-high/low) versions. The WDO output is open-drain and active-low, but it is not a substitute for a second reset polarity-it serves watchdog timeout indication only.
Can the ADM706PARZ-REEL monitor a second voltage rail besides VCC?
Yes, the ADM706PARZ-REEL includes a dedicated Power-Fail Input (PFI, Pin 4) with a 1.25 V internal reference. By connecting an external resistor divider from a secondary supply (e.g., battery or analog rail) to PFI, the device generates a low-going PFO signal when that supply falls below the programmed threshold-enabling early-warning detection or auxiliary reset triggering.
What is the minimum VCC voltage at which ADM706PARZ-REEL guarantees valid RESET output?
The ADM706PARZ-REEL guarantees valid RESET output down to VCC = 1 V, as specified in the datasheet. Below this voltage, internal transistor drive degrades, and external pull-down may be required to maintain logic-low state. This feature ensures deterministic microprocessor hold during deep brownout events common in battery-powered or automotive applications.
Is the manual reset (MR) input debounced internally in the ADM706PARZ-REEL?
Yes, the MR input of the ADM706PARZ-REEL is internally debounced with a 200 ms timeout period-matching the reset pulse width. This eliminates the need for external RC filtering or firmware debouncing. The input also features a 70 µA internal pull-up current, allowing direct connection to a momentary switch without external biasing components.
ADM706PARZ-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:
- 2.63V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High
- Reset Timeout:
- 160ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ADM706PARZ-REEL FAQ
1.How can I place an order for ADM706PARZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM706PARZ-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 ADM706PARZ-REEL reliable?
The price and inventory of ADM706PARZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM706PARZ-REEL is usually 5 days.
3.What payment methods are accepted for ADM706PARZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM706PARZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM706PARZ-REEL?
ADM706PARZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM706PARZ-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 ADM706PARZ-REEL?
For technical support, including ADM706PARZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM706PARZ-REEL requirements.
6.How does Aetrix verify that ADM706PARZ-REEL is sourced from the original manufacturer or authorized distributors?
All ADM706PARZ-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 ADM706PARZ-REEL meets industry standards.
7.What is the process for return or replacement of ADM706PARZ-REEL?
All ADM706PARZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with ADM706PARZ-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 ADM706PARZ-REEL part is unused and in its original packaging.
Return procedure for ADM706PARZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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