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Analog Devices Inc. ADM706PAR-REEL
- Part No.:
- ADM706PAR-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADM706PAR-REEL.pdf
- Description:
- IC SUPERVISOR MPU 2.63V WD 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
ADM706PAR-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 (1.6 s timeout). It monitors power-up, brownout, and supply failure in embedded controllers and battery-powered instruments.
For engineers reviewing the ADM706PAR-REEL datasheet, ADM706PAR-REEL pinout, ADM706PAR-REEL application, or ADM706PAR-REEL equivalent, this page delivers verified functional specifications, SOIC-8 package mapping, reset timing behavior, power-fail comparator interface details, and validated alternative options for 3 V system supervision.
Technical Context
The ADM706PAR-REEL implements a precision voltage monitor with 2.63 V ±40 mV threshold and hysteresis, a debounced manual reset input (MR) with 70 µA internal pull-up, and a transition-sensitive watchdog timer cleared by either edge on WDI. Its reset generator guarantees valid output down to VCC = 1 V.
It integrates a dedicated 1.25 V power-fail comparator (PFI/PFO) for early warning of supply collapse and supports bidirectional reset line interfacing via external current-limiting resistors. All logic outputs meet TTL/CMOS voltage thresholds across 2.7–5.5 V VCC range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 2.63 V ±40 mV - ensures reliable reset assertion during 3 V supply brownout or startup under-spec conditions |
| Reset Pulse Width | 200 ms typical - provides sufficient hold time for microprocessor initialization and clock stabilization |
| Quiescent Current | 100 µA at VCC < 3.6 V - enables long battery life in portable instrumentation and low-power embedded systems |
| Watchdog Timeout | 1.6 s - detects firmware lockup in real-time control loops without requiring software polling |
| Power-Fail Comparator Threshold | 1.25 V - allows monitoring of auxiliary supplies (e.g., 5 V preregulator) via external resistor divider |
| Valid RESET Down to | VCC = 1 V - maintains processor in known state during deep undervoltage recovery, preventing metastability |
| MR Input Pull-Up | 70 µA typical - eliminates need for external pull-up while supporting direct switch connection |
Pinout & Package
ADM706PAR-REEL is housed in an 8-lead SOIC_N (R-8) package per JEDEC MS-012-AA, with 1.27 mm lead pitch, 5.00 mm × 4.00 mm body, and 1.75 mm max height.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 MR | Manual Reset Input | Debounced TTL/CMOS-compatible input; asserted low < 0.6 V; internally pulled up with 70 µA |
| 2 VCC | Power Supply Input | Primary supply rail (2.7–5.5 V); requires 0.1 µF decoupling capacitor to GND |
| 3 GND | Ground Reference | Common return path for all analog and digital functions; must be low-impedance |
| 4 PFI | Power-Fail Input | Noninverting input to 1.25 V comparator; monitors auxiliary supply via resistor divider |
| 5 PFO | Power-Fail Output | Active-low open-drain output signaling supply collapse; sinks ≥1.2 mA at VCC < 3.6 V |
| 6 WDI | Watchdog Input | Edge-triggered input; any transition clears 1.6 s timer; accepts pulses as narrow as 50 ns |
| 7 RESET | Reset Output | Active-low push-pull output; drives low for 200 ms after VCC rise or MR assertion |
| 8 WDO | Watchdog Output | Active-low push-pull output; goes low on timeout or when VCC < reset threshold |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed RESET operation down to VCC = 1 V | Ensures deterministic microprocessor shutdown during deep brownout, eliminating undefined states |
| Integrated 1.25 V power-fail comparator (PFI/PFO) | Enables early-warning detection of preregulator failure before main 3 V rail collapses |
| Debounced MR input with internal 70 µA pull-up | Supports direct mechanical switch connection without external components or firmware debounce |
| Transition-sensitive watchdog timer (1.6 s) | Detects stalled firmware execution using hardware-level edge detection, independent of clock source |
| Active-low RESET and WDO outputs with rail-to-rail drive | Directly interfaces with standard microcontroller reset inputs without level-shifting or inversion logic |
Applications
| Industrial PLC Controller Monitoring | Battery-Powered Data Logger |
|---|---|
Use Scenario: Continuous operation in factory automation where unexpected power dips must trigger safe I/O shutdown and state preservation. IC Role / Device Role / Timing Role: Supervisory IC providing brownout reset, watchdog fault detection, and power-fail interrupt generation. Use Value: Prevents corrupted control outputs and memory writes during unstable 3 V supply, reducing field failures by ensuring deterministic restart. | Use Scenario: Long-duration environmental sensing in remote locations powered by primary lithium cells. IC Role / Device Role / Timing Role: Low-current supervisor enabling >5-year battery life while guaranteeing reset validity down to 1 V. Use Value: Extends usable battery range by maintaining MCU in reset until minimum operating voltage is restored, avoiding erratic low-VCC operation. |
| Medical Handheld Instrument | Communications Baseband Processor |
Use Scenario: Portable diagnostic device requiring fail-safe boot sequence and runtime crash recovery under variable battery load. IC Role / Device Role / Timing Role: Dual-role supervisor: power-on reset generator and watchdog timer feeding NMI interrupt. Use Value: Eliminates need for separate reset IC and watchdog IC, reducing BOM count and PCB area in space-constrained designs. | Use Scenario: Cellular modem subsystem where 3 V core supply must remain stable during RF transmit bursts causing transient droop. IC Role / Device Role / Timing Role: Voltage monitor asserting RESET within 200 ms of VCC falling below 2.63 V, synchronized with baseband reset domain. Use Value: Prevents protocol stack corruption by holding processor in reset during RF-induced supply sag, ensuring clean reinitialization. |
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 timeout, SOIC-8 package; lacks integrated power-fail comparator (PFI/PFO) | Cannot monitor auxiliary supplies or provide early power-fail warning without external comparator | Select when only basic reset + watchdog functionality is required and PFI/PFO is unused |
| TPS3808G12DBVR | 2.93 V reset threshold, 200 ms delay, 1.8 µA quiescent current; no watchdog or PFI/PFO functions | Lower power but missing watchdog and power-fail features; requires external circuitry for full ADM706PAR-REEL capability | Select for ultra-low-power 3 V systems where watchdog and PFI are not needed |
Compared with MAX706RCSA+T and TPS3808G12DBVR, ADM706PAR-REEL uniquely combines 2.63 V supervision, 1.6 s watchdog, and 1.25 V power-fail comparator in one SOIC-8 device-enabling single-chip solution for robust 3 V system monitoring without external components.
Availability
ADM706PAR-REEL is available at Aetrix Electronics and suitable for industrial PLC controllers, battery-powered data loggers, medical handheld instruments, and communications baseband processors requiring stable component supply and long-term lifecycle support.
Supply support for ADM706PAR-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.
The ADM706 family was designed specifically for reliable microprocessor supervision in 3 V systems, integrating reset generation, watchdog monitoring, and auxiliary supply monitoring in compact SOIC-8 and PDIP packages.
FAQ
What is the reset threshold voltage of the ADM706PAR-REEL?
The ADM706PAR-REEL has a nominal reset threshold of 2.63 V, with a guaranteed range of 2.55 V to 2.70 V across temperature and supply conditions. This value is fixed per the 'R' suffix designation and ensures reliable detection of 3 V supply brownout events before critical logic levels are violated. The ADM706PAR-REEL uses an internal precision reference to maintain this threshold without external calibration.
Does the ADM706PAR-REEL include a watchdog timer function?
Yes, the ADM706PAR-REEL includes a fully integrated watchdog timer with a nominal timeout period of 1.6 seconds. It is cleared by any rising or falling edge on the WDI pin and asserts WDO low if no transition occurs within that window. The timer resets automatically during RESET assertion, and WDO is forced low whenever VCC falls below the 2.63 V reset threshold-ensuring coordinated fault response in the ADM706PAR-REEL.
Can the ADM706PAR-REEL monitor a second power supply?
Yes, the ADM706PAR-REEL can monitor a second supply using its dedicated PFI (power-fail input) and PFO (power-fail output) pins. By connecting the auxiliary supply through a resistor divider to PFI, the internal 1.25 V comparator triggers PFO low when the divided voltage drops below threshold. This enables early-warning shutdown before the main 3 V rail fails, and the ADM706PAR-REEL supports hysteresis addition via external feedback resistor for noise immunity.
What package type is used for the ADM706PAR-REEL?
The ADM706PAR-REEL is supplied in an 8-lead SOIC_N (small outline integrated circuit, narrow body) package, also designated R-8 per JEDEC MS-012-AA. It measures 5.00 mm × 4.00 mm with 1.27 mm lead pitch and is optimized for surface-mount assembly and automated reel-based handling. This package matches the footprint of industry-standard supervisory ICs and supports thermal dissipation up to 470 mW.
Is the reset output of the ADM706PAR-REEL active-high or active-low?
The ADM706PAR-REEL provides an active-low RESET output, consistent with the 'R' suffix in its part number. It drives low for 200 ms upon power-up, brownout recovery, or MR assertion, and remains low as long as VCC stays below 2.63 V. The output is push-pull (not open-drain), capable of sourcing up to 800 µA and sinking up to 3.2 mA, ensuring direct compatibility with standard microcontroller reset inputs without external pull-ups or inverters.
ADM706PAR-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- 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
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ADM706PAR-REEL FAQ
1.How can I place an order for ADM706PAR-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM706PAR-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 ADM706PAR-REEL reliable?
The price and inventory of ADM706PAR-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM706PAR-REEL is usually 5 days.
3.What payment methods are accepted for ADM706PAR-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM706PAR-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM706PAR-REEL?
ADM706PAR-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM706PAR-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 ADM706PAR-REEL?
For technical support, including ADM706PAR-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM706PAR-REEL requirements.
6.How does Aetrix verify that ADM706PAR-REEL is sourced from the original manufacturer or authorized distributors?
All ADM706PAR-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 ADM706PAR-REEL meets industry standards.
7.What is the process for return or replacement of ADM706PAR-REEL?
All ADM706PAR-REEL units undergo pre-shipment inspection (PSI). If there is an issue with ADM706PAR-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 ADM706PAR-REEL part is unused and in its original packaging.
Return procedure for ADM706PAR-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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