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Analog Devices Inc. ADM707AR-REEL
- Part No.:
- ADM707AR-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADM707AR-REEL.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,397
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Product details
Overview
ADM707AR-REEL from Analog Devices is a precision 5 V microprocessor supervisory circuit with active-high reset output, 4.65 V supply voltage monitor threshold, 200 ms reset pulse width, and power-fail comparator (PFI/PFO), used in embedded systems requiring reliable power-on reset and brownout protection.
For engineers reviewing the ADM707AR-REEL datasheet, ADM707AR-REEL pinout, ADM707AR-REEL application, or ADM707AR-REEL equivalent, this page delivers verified functional identity, SOIC-8 package mapping, reset timing behavior, PFI comparator interface details, and validated alternative options for industrial microcontroller power monitoring designs.
Technical Context
The ADM707AR-REEL implements a dedicated voltage-monitoring architecture with a precision 4.65 V threshold detector and internal hysteresis (40 mV), guaranteeing valid RESET assertion down to VCC = 1 V. Its reset generator holds RESET high for 200 ms after VCC rises above threshold or MR deasserts.
It integrates a 1.25 V reference-based power-fail comparator (PFI input, PFO output) for early warning of supply collapse or low-battery conditions, and features a debounced TTL/CMOS-compatible manual reset input (MR) with 250 µA internal pull-up current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold | 4.65 V ±150 mV - triggers reset during 5 V supply brownout or power-up ramp |
| Reset Pulse Width | 200 ms typical - ensures sufficient processor stabilization time after power-on or recovery | Supply Current | 190 µA typical - enables low-power operation in battery-backed or energy-sensitive systems |
| PFI Threshold | 1.25 V ±25 mV - sets precise trip point for external supply monitoring via resistive divider |
| RESET Output Type | Active-high logic level - directly interfaces with processors requiring high-asserted reset (e.g., ARM Cortex-M, PIC18F) |
| VCC Validity Range | 1.0 V to 5.5 V - guarantees functional reset assertion even during deep undervoltage conditions |
| Operating Temp | −40°C to +85°C - supports industrial-grade deployment without derating |
Pinout & Package
ADM707AR-REEL is housed in an 8-lead SOIC_N (R-8) package per JEDEC MS-012-AA, with 1.27 mm pitch, 4.90 mm × 3.90 mm body, and 1.75 mm max height. Pin 1 is marked by beveled corner or notch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (MR) | Manual Reset Input | TTL/CMOS-compatible debounced input; pulled up internally with 250 µA; asserts reset when driven below 0.8 V |
| 2 (VCC) | Power Supply Input | 5 V nominal supply rail; requires local 0.1 µF decoupling capacitor to GND |
| 3 (GND) | Ground Reference | 0 V return path for all analog and digital functions; must be low-impedance connection |
| 4 (PFI) | Power-Fail Input | Noninverting input to 1.25 V comparator; monitors auxiliary supply via resistor divider; connect to GND if unused |
| 5 (PFO) | Power-Fail Output | Open-drain active-low output signaling PFI < 1.25 V; can interrupt MCU or trigger shutdown sequence |
| 6 (NC) | No Connect | Internally unconnected; must remain floating or tied to GND (not VCC) |
| 7 (RESET) | Active-High Reset Output | Push-pull output asserted high for 200 ms during power-up/brownout; sinks 1.2 mA min at 0.4 V |
| 8 (NC) | No Connect | Internally unconnected; must remain floating or tied to GND (not VCC) |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed RESET validity at VCC = 1 V | Ensures fail-safe processor hold-down during deep undervoltage events, preventing erratic execution |
| 200 ms reset pulse width | Provides deterministic timing margin for 5 V system stabilization, eliminating need for external RC timing |
| 1.25 V precision PFI comparator | Enables accurate monitoring of secondary supplies (e.g., 3.3 V, 12 V) using standard resistor dividers |
| Debounced MR input with 250 µA pull-up | Supports direct switch connection without external components; eliminates bounce-induced false resets |
| SOIC-8 RoHS-compliant packaging | Facilitates automated SMT assembly and meets industrial environmental compliance requirements |
Applications
| Industrial PLC Controller | Medical Diagnostic Instrument |
|---|---|
|
Use Scenario: Monitoring 5 V main supply and 3.3 V logic rail in a DIN-rail mounted programmable logic controller. IC Role / Device Role / Timing Role: ADM707AR-REEL provides active-high RESET to ARM-based CPU and generates PFO interrupt on 3.3 V droop detected via PFI divider. Use Value: Prevents firmware corruption during line sags by asserting RESET before CPU enters undefined state; PFO enables graceful I/O shutdown. |
Use Scenario: Power supervision in portable ultrasound imaging device with dual battery/supply paths. IC Role / Device Role / Timing Role: ADM707AR-REEL monitors main 5 V DC-DC output and uses PFI to detect Li-ion battery voltage decay below 3.2 V. Use Value: Active-high RESET ensures compatibility with diagnostic SoC reset pin; PFO triggers battery-saving mode before critical cutoff. |
| Automotive Infotainment Head Unit | Smart Energy Meter |
|
Use Scenario: Cold-cranking resilience testing where 12 V battery dips to 6 V, causing 5 V rail to sag transiently. IC Role / Device Role / Timing Role: ADM707AR-REEL asserts RESET during VCC drop below 4.65 V and maintains it for 200 ms post-recovery. Use Value: Guarantees clean restart of infotainment MCU after engine start; 1 V minimum VCC operation prevents spurious resets during worst-case sag. |
Use Scenario: Tamper-resistant meter with backup supercapacitor and real-time clock requiring stable power sequencing. IC Role / Device Role / Timing Role: ADM707AR-REEL monitors primary 5 V supply and uses PFI to detect supercapacitor discharge below 2.5 V threshold. Use Value: Enables secure RTC save-and-hibernate before power loss; RESET pulse width aligns with EEPROM write cycle timing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX707CSA+ | Same 4.65 V threshold, 200 ms reset, SOIC-8, but includes watchdog timer (WDO) and lacks PFO output | Requires external circuitry to replicate PFI/PFO functionality; not suitable where power-fail warning is mandatory | Select only if watchdog monitoring is prioritized over independent power-fail alerting |
| TPS3808G33DBVR | 3.3 V fixed threshold, adjustable reset delay (up to 200 ms), 1.6 µA quiescent current, no PFI/PFO comparator | Designed for low-voltage systems; cannot monitor 5 V rails or provide auxiliary supply warning | Use only in 3.3 V domains where ultra-low IQ outweighs missing PFI capability |
Compared with MAX707CSA+ and TPS3808G33DBVR, ADM707AR-REEL uniquely combines 5 V supply supervision, active-high RESET, and integrated PFI/PFO in a single SOIC-8 footprint-making it irreplaceable in applications requiring both robust reset generation and early power-fail detection without added components.
Availability
ADM707AR-REEL is available at Aetrix Electronics and suitable for industrial PLC controllers, medical diagnostic instruments, automotive infotainment head units, smart energy meters, and critical microprocessor supply monitoring requiring stable component supply across extended temperature ranges.
Supply support for ADM707AR-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, headquartered in Norwood, MA, with design centers worldwide and ISO 9001-certified manufacturing.
The ADM70x family was engineered specifically for reliable 5 V microprocessor supervision in industrial and embedded systems, emphasizing low-voltage reset validity, noise-immune manual reset, and auxiliary supply monitoring via PFI/PFO.
FAQ
What is the reset threshold voltage of the ADM707AR-REEL?
The ADM707AR-REEL has a nominal reset threshold of 4.65 V, with a tolerance of ±150 mV (4.50 V to 4.75 V). This value is factory-trimmed and specified over the full −40°C to +85°C operating range. The threshold applies to both power-up and brownout detection, and the device guarantees valid RESET assertion even when VCC drops as low as 1 V.
Does the ADM707AR-REEL include a watchdog timer function?
No, the ADM707AR-REEL does not include a watchdog timer. It belongs to the ADM707/ADM708 variant group, which omits the WDI and WDO pins present in ADM705/ADM706. Instead, ADM707AR-REEL provides dual reset outputs (active-low RESET and active-high RESET) and retains the PFI/PFO power-fail comparator for auxiliary supply monitoring.
How is the power-fail comparator used in the ADM707AR-REEL?
The ADM707AR-REEL's PFI pin connects to the noninverting input of an internal 1.25 V comparator; PFO is its open-drain active-low output. To monitor a secondary supply (e.g., 3.3 V), a resistor divider scales the voltage to 1.25 V at PFI. When the scaled voltage falls below 1.25 V, PFO pulls low-enabling MCU interrupt-driven shutdown or data save operations before power loss.
What is the function of the NC pins on the ADM707AR-REEL SOIC-8 package?
Pins 6 and 8 on the ADM707AR-REEL are designated NC (No Connect) and are internally unconnected. They must remain electrically floating or be tied to GND-never to VCC or signal lines. These pins correspond to WDI and WDO in the ADM705/ADM706 variants but serve no function in ADM707AR-REEL, reflecting its simplified supervisory feature set.
Can the ADM707AR-REEL drive a microprocessor reset pin directly?
Yes, the ADM707AR-REEL's active-high RESET output is a push-pull driver capable of sourcing 800 µA (VCC − 1.5 V) and sinking 1.2 mA (0.4 V max), making it compatible with standard CMOS/TTL reset inputs. For bidirectional reset lines or high-capacitance loads, a 4.7 kΩ series current-limiting resistor is recommended to prevent contention, per Analog Devices' application guidance.
ADM707AR-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, Push-Pull
- Reset:
- Active High/Active Low
- Reset Timeout:
- 160ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ADM707AR-REEL FAQ
1.How can I place an order for ADM707AR-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for ADM707AR-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 ADM707AR-REEL reliable?
The price and inventory of ADM707AR-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADM707AR-REEL is usually 5 days.
3.What payment methods are accepted for ADM707AR-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADM707AR-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADM707AR-REEL?
ADM707AR-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADM707AR-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 ADM707AR-REEL?
For technical support, including ADM707AR-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADM707AR-REEL requirements.
6.How does Aetrix verify that ADM707AR-REEL is sourced from the original manufacturer or authorized distributors?
All ADM707AR-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 ADM707AR-REEL meets industry standards.
7.What is the process for return or replacement of ADM707AR-REEL?
All ADM707AR-REEL units undergo pre-shipment inspection (PSI). If there is an issue with ADM707AR-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 ADM707AR-REEL part is unused and in its original packaging.
Return procedure for ADM707AR-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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