Part A
ADM705AR
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2558 PCS
- Package
- SOIC-8
- Series
- PMIC - Supervisors
Replacement verdict
Compatible functional replacement candidate
The ADM705AR and ADM705AR-REEL are functionally identical supervisory ICs from the same manufacturer, differing only in packaging format. The ADM705AR-REEL is supplied on tape and reel for automated assembly, while the ADM705AR is supplied in tube or tray format. Both share the same silicon die, electrical specifications, and package type, making them fully interchangeable in design and function. The only consideration is the assembly process compatibility with the chosen packaging format.
Function and Topology
High match
Electrical Specifications
High match
Package Type
High match
Packaging Format
Validation required
Parts at a glance
Part B
ADM705AR-REEL
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 7831 PCS
- Package
- SOIC-8
- Series
- PMIC - Supervisors
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | ADM705AR | ADM705AR-REEL | Why it matters |
|---|---|---|---|
| Manufacturer | Analog Devices Inc. | Analog Devices Inc. | Same manufacturer ensures identical silicon design and process, supporting functional substitutability. |
| Function | Microprocessor supervisory circuit (power supply monitor with reset) | Microprocessor supervisory circuit (power supply monitor with reset) | Identical device function confirms the parts serve the same supervisory role in a system. |
| Reset Threshold Voltage | 4.65 V (typical) | 4.65 V (typical) | The reset threshold determines the supply voltage at which a reset is asserted; matching values ensure identical brownout behavior. |
| Reset Output Type | Active-low push-pull | Active-low push-pull | Output topology must match to interface correctly with the processor reset pin without external pull-ups. |
| Watchdog Timer | Yes (1.6 s typical timeout) | Yes (1.6 s typical timeout) | The watchdog feature and its timeout period affect system fault recovery; identical values preserve behavior. |
| Manual Reset Input | Yes | Yes | A manual reset input allows external system reset; both parts provide it, so board-level reset wiring is unchanged. |
| Supply Voltage Range | 4.75 V to 5.5 V | 4.75 V to 5.5 V | Operating voltage range must match the system rail to ensure reliable supervision and reset assertion. |
| Package / Mounting | 8-SOIC, surface mount | 8-SOIC, surface mount | Identical package and footprint allow drop-in replacement on the same PCB land pattern. |
| Packaging / Delivery Form | Tube / bulk | Tape and reel | Delivery form differs; tape and reel suits automated pick-and-place assembly while tube is used for manual or low-volume handling. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADM705AR | ADM705AR-REEL |
|---|---|---|
| Part Status | Obsolete | Obsolete |
| Type | Simple Reset/Power-On Reset | Simple Reset/Power-On Reset |
| Number of Voltages Monitored | 1 | 1 |
| Voltage - Threshold | 4.65V | 4.65V |
| Output | Push-Pull, Totem Pole | Push-Pull, Totem Pole |
| Reset | Active Low | Active Low |
| Reset Timeout | 160ms Minimum | 160ms Minimum |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What is the difference between ADM705AR and ADM705AR-REEL?
The ADM705AR and ADM705AR-REEL are the same supervisory circuit device; the "-REEL" suffix denotes tape-and-reel packaging for automated assembly, while the base ADM705AR part number refers to the same die in tube or standard packaging. Electrical specifications are identical.
What function does the ADM705AR perform in a system?
The ADM705AR is a microprocessor supervisory circuit that monitors the power supply and generates a reset signal to the microprocessor during power-up, power-down, and brownout conditions, and it also includes a watchdog timer and manual reset input.
What is the reset threshold voltage of the ADM705AR?
The ADM705AR has a reset threshold of 4.65 V (typical) for 5 V systems, with the reset output held active until VCC rises above the threshold and the reset timeout period expires.
What reset output configuration does the ADM705AR provide?
The ADM705AR provides an active-low reset output (RESET) that is asserted low when VCC is below the reset threshold and remains low for the reset timeout period after VCC returns above the threshold.
Does the ADM705AR include a watchdog timer?
Yes, the ADM705AR integrates a watchdog timer that monitors microprocessor activity via the WDI pin; if the watchdog input is not toggled within the watchdog timeout period, a reset is generated.
What package does the ADM705AR use?
The ADM705AR is offered in an 8-lead SOIC package (SOIC-8), which is the package type associated with the "AR" suffix in the part number.
Can ADM705AR and ADM705AR-REEL be used interchangeably in a design?
Yes, since both are the same device with identical electrical and package specifications, they are functionally interchangeable; the choice depends only on the assembly method (tape-and-reel for automated pick-and-place versus tube/standard packaging).
What supply voltage range does the ADM705AR support?
The ADM705AR is designed for 5 V systems and operates with a supply voltage range suitable for monitoring a nominal 5 V rail, with the reset threshold set at 4.65 V typical.