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Analog Devices Inc. ADM706TAR-REEL
- Part No.:
- ADM706TAR-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADM706TAR-REEL.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,773
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Product details
Overview
ADM706TAR-REEL from Analog Devices is a 3.08 V precision microprocessor supervisory IC with active-low reset output, 200 ms reset pulse width, 100 µA quiescent current, and integrated watchdog timer (1.6 s timeout). It monitors 3.15–5.5 V supplies in embedded controllers and battery-powered instrumentation where reliable power-on/brownout reset and processor activity supervision are required.
For engineers reviewing the ADM706TAR-REEL datasheet, ADM706TAR-REEL pinout, ADM706TAR-REEL application, or ADM706TAR-REEL equivalent, this page delivers verified specifications, functional context, package mapping, real-world use cases, and validated alternative options for industrial microprocessor monitoring designs.
Technical Context
The ADM706TAR-REEL implements a precision voltage monitor with 3.08 V ±75 mV threshold and 20 mV hysteresis, guaranteeing valid RESET down to VCC = 1 V. Its internal watchdog timer activates on WDI inactivity exceeding 1.6 s (typ), with transition detection down to 50 ns pulses at VCC = 5 V.
A dedicated 1.25 V power-fail comparator accepts external resistive divider input via PFI and asserts PFO low upon undervoltage detection. The debounced MR input draws 70 µA pull-up current and triggers reset within 750 ns (VCC < 3.6 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 3.08 V (±75 mV) - sets precise brownout detection point for 3.3 V systems |
| Reset Pulse Width | 200 ms - ensures sufficient processor stabilization time after power-up or recovery |
| Quiescent Current | 100 µA - enables long battery life in portable instruments and low-power controllers |
| Watchdog Timeout | 1.6 s (typ) - provides robust stall detection for microprocessor firmware loops |
| Power-Fail Threshold | 1.25 V - enables configurable early-warning monitoring of auxiliary supplies via PFI divider |
| VCC Operating Range | 3.15 V to 5.5 V - supports 3.3 V and 5 V logic domains without level-shifting |
| RESET Output Polarity | Active low - directly interfaces with standard microprocessor /RESET inputs |
Pinout & Package
ADM706TAR-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 | Debounced manual reset input | TTL/CMOS-compatible; internally pulled up with 70 µA; triggers 200 ms reset when driven below 0.6 V |
| 2 VCC | Positive supply input | Accepts 3.15–5.5 V; requires 0.1 µF decoupling capacitor to GND for noise immunity |
| 3 GND | Ground reference | Common return path for all analog and digital circuitry; must be low-impedance |
| 4 PFI | Power-fail comparator noninverting input | Monitors auxiliary supply via resistor divider; asserts PFO low when voltage falls below 1.25 V |
| 5 PFO | Power-fail comparator output | Open-drain active-low signal used for early warning interrupt or secondary reset generation |
| 6 WDI | Watchdog timer input | Edge-sensitive; clears 1.6 s timer on any high↔low transition; detects pulses ≥50 ns |
| 7 RESET | Active-low reset output | Guaranteed valid down to VCC = 1 V; remains low for 200 ms after VCC rises above 3.08 V or MR release |
| 8 WDO | Watchdog timer output | Active-low open-drain output; goes low on timeout or during VCC brownout; connects to NMI or MR |
Key Features
| Feature | Design Value |
|---|---|
| Precision reset threshold | 3.08 V ±75 mV - eliminates need for external trimming in 3.3 V system power monitoring |
| Guaranteed RESET validity at 1 V VCC | Ensures microprocessor remains held in reset during full power collapse and recovery ramp |
| Integrated debounced MR input | 70 µA internal pull-up and 200 ms debounce eliminate external RC network and reduce BOM count |
| Dual-supply monitoring capability | Independent 1.25 V PFI comparator allows simultaneous monitoring of main and backup supplies |
| Low-quiescent-current watchdog | 100 µA total supply current includes full watchdog functionality - no trade-off between supervision and power savings |
Applications
| Industrial Controller Monitoring | Portable Medical Instrumentation |
|---|---|
|
Use Scenario: PLC or motion controller operating from 3.3 V rail with critical firmware integrity requirements. IC Role / Device Role / Timing Role: Supervises VCC for brownout detection and monitors CPU activity via WDI to prevent lockup-induced safety hazards. Use Value: 200 ms reset pulse ensures deterministic boot sequence; 1.6 s watchdog timeout catches firmware hangs before actuator misfire occurs. |
Use Scenario: Handheld glucose meter powered by single-cell Li-ion with 3.3 V LDO output. IC Role / Device Role / Timing Role: Monitors main supply (VCC) and battery voltage (via PFI divider) to trigger orderly shutdown before cutoff. Use Value: 3.08 V reset threshold aligns with 3.3 V LDO dropout; 1.25 V PFI reference enables accurate low-battery warning at 3.0 V cell voltage. |
| Network Edge Sensor Node | Test & Measurement Equipment |
|
Use Scenario: LoRaWAN sensor node with intermittent RF transmission and deep-sleep cycles. IC Role / Device Role / Timing Role: Provides power-on reset and validates MCU wake-up integrity using WDI toggling synchronized to radio events. Use Value: 100 µA quiescent current minimizes sleep-mode drain; MR input enables remote reset via GPIO from gateway. |
Use Scenario: Benchtop oscilloscope with FPGA-based acquisition engine requiring deterministic initialization. IC Role / Device Role / Timing Role: Generates synchronized reset for FPGA, ADC, and communication peripherals during power-up and brownout recovery. Use Value: Active-low RESET output interfaces natively with Xilinx/Intel FPGA /PROG_B pins; PFO alerts host processor of auxiliary supply failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX706TCSA+ | 3.08 V reset threshold, 200 ms timeout, same SOIC-8 package; lacks PFI/PFO and watchdog timer | Suitable only for basic reset-only applications; cannot support power-fail warning or CPU activity monitoring | Select when design requires only reset generation and minimal BOM cost; avoid if watchdog or dual-supply monitoring is needed |
| TPS3808G30DBVR | 3.0 V reset threshold (±0.5%), 200 ms delay, 1.6 µA quiescent current; no watchdog or PFI/PFO | Ultra-low power focus; intended for always-on battery-backed systems where watchdog is handled externally | Prefer for energy-constrained IoT nodes; not suitable for designs requiring integrated watchdog or auxiliary supply monitoring |
Compared with MAX706TCSA+ and TPS3808G30DBVR, ADM706TAR-REEL uniquely integrates watchdog supervision, power-fail comparator, and 3.08 V precision reset in one SOIC-8 device-enabling consolidated supervision without external components or firmware overhead.
Availability
ADM706TAR-REEL is available at Aetrix Electronics and suitable for industrial controllers, portable medical devices, and test equipment requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for ADM706TAR-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-delivering precision voltage monitoring, watchdog protection, and power-fail warning in a single compact IC for mission-critical embedded systems.
FAQ
What is the exact reset threshold voltage of the ADM706TAR-REEL?
The ADM706TAR-REEL has a nominal reset threshold of 3.08 V, with a guaranteed range of 3.00 V to 3.15 V over temperature and supply variations. This value is factory-trimmed and specified in Table 1 of the Rev. E datasheet under "Reset Threshold (VRST)" for ADM706T/ADM708T variants. It is optimized for reliable supervision of 3.3 V power rails.
Does the ADM706TAR-REEL include a watchdog timer function?
Yes, the ADM706TAR-REEL includes a fully integrated watchdog timer with a typical timeout period of 1.6 seconds. It monitors the WDI input for transitions and asserts the WDO output low if no edge is detected within that window. This feature is confirmed in the FEATURES section and Functional Block Diagram (Figure 13) of the ADM706TAR-REEL datasheet.
What package type and footprint does the ADM706TAR-REEL use?
The ADM706TAR-REEL uses an 8-lead SOIC_N (narrow-body small outline integrated circuit) package, designated R-8 per JEDEC MS-012-AA. Its dimensions are 5.00 mm × 4.00 mm × 1.75 mm max, with 1.27 mm lead pitch. This matches industry-standard SOIC-8 footprints and is documented in Figure 25 and the Ordering Guide of the datasheet.
Can the ADM706TAR-REEL monitor a second voltage rail besides VCC?
Yes, the ADM706TAR-REEL can monitor a second supply using its dedicated PFI (Power-Fail Input) pin and internal 1.25 V comparator. By connecting a resistor divider from the auxiliary rail to PFI, the device asserts PFO low when that rail drops below the programmed threshold - enabling early-warning shutdown or secondary reset generation as described in Figure 22 and the Applications Information section.
Is the reset output of the ADM706TAR-REEL active-high or active-low?
The ADM706TAR-REEL provides an active-low reset output (labeled RESET on Pin 7). This is explicitly stated in the GENERAL DESCRIPTION ("ADM706R, ADM706S, and ADM706T … have active low reset output") and confirmed in Pin Function Descriptions (Table 3), where Pin 7 is defined as "RESET - Logic Output. RESET goes low for 200 ms when triggered."
ADM706TAR-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:
- 3.08V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 160ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ADM706TAR-REEL FAQ
1.How can I place an order for ADM706TAR-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM706TAR-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 ADM706TAR-REEL reliable?
The price and inventory of ADM706TAR-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM706TAR-REEL is usually 5 days.
3.What payment methods are accepted for ADM706TAR-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM706TAR-REEL transactions.
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4.How is shipping managed for ADM706TAR-REEL?
ADM706TAR-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM706TAR-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 ADM706TAR-REEL?
For technical support, including ADM706TAR-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM706TAR-REEL requirements.
6.How does Aetrix verify that ADM706TAR-REEL is sourced from the original manufacturer or authorized distributors?
All ADM706TAR-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 ADM706TAR-REEL meets industry standards.
7.What is the process for return or replacement of ADM706TAR-REEL?
All ADM706TAR-REEL units undergo pre-shipment inspection (PSI). If there is an issue with ADM706TAR-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 ADM706TAR-REEL part is unused and in its original packaging.
Return procedure for ADM706TAR-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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