Part A
ADM708TARZ-REEL
ADI公司
- Lifecycle
- Active
- Stock
- 5886 件
- Package
- SOIC-8
- Series
- PMIC-首長
Replacement verdict
Compatible functional replacement candidate
The ADM708TARZ-REEL and ADM709MAR are both single-voltage supervisor ICs from the same Analog Devices family, sharing a common functional architecture and SOIC-8 footprint. While their reset threshold voltages and reset output configurations differ, they are functionally comparable for many supervisory applications, provided the threshold and output type are validated against the target design requirements.
Reset Threshold Voltage
Validation required
Reset Output Type
Validation required
Package Type
High match
Supply Voltage Range
High match
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | ADM708TARZ-REEL | ADM709MAR | Why it matters |
|---|---|---|---|
| Reset Threshold Voltage (typ) | 4.40 V | 4.65 V | Determines the supply voltage level at which the supervisor asserts reset; a different threshold changes the monitored rail tolerance and can cause false or missed resets in a given system. |
| Reset Output Type | Active-low push-pull (RESET) | Active-low open-drain (RESET) | Push-pull drives the line both high and low, while open-drain requires an external pull-up; this affects interfacing, logic levels, and whether the output can be wire-ORed. |
| Manual Reset Input | Yes (MR) | No | A manual reset input allows an external push-button or logic signal to force a system reset; its absence removes that capability and changes board-level design. |
| Watchdog Timer | Yes (WDI) | No | A watchdog monitors processor activity and asserts reset on a hang; lacking it means the design loses a key fault-recovery function. |
| Supply Voltage Range | 1.0 V to 5.5 V | 4.5 V to 5.5 V (5 V nominal) | Defines the operating supply window; the wider low-voltage range of one part allows use in 3.3 V or lower systems, while the other is limited to 5 V rails. |
| Reset Timeout Delay | 200 ms (typ) | 200 ms (typ) | Sets how long reset stays asserted after the supply recovers, ensuring the processor has stable power before code execution; matching values ease substitution. |
| Package | 8-lead SOIC (N) | 8-lead SOIC (N) | Footprint and pinout compatibility determine whether the parts are drop-in replacements on an existing PCB. |
| Pin Count | 8 | 8 | Pin count affects package selection and layout; equal counts suggest similar physical form factor but pin functions must still be verified. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Defines the environmental envelope for reliable operation; matching ranges mean equivalent thermal suitability for industrial applications. |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADM708TARZ-REEL | ADM709MAR |
|---|---|---|
| Part Status | Active | Obsolete |
| Type | Simple Reset/Power-On Reset | Simple Reset/Power-On Reset |
| Number of Voltages Monitored | 1 | 1 |
| Voltage - Threshold | 3.08V | 4.4V |
| Output | Push-Pull, Push-Pull | Push-Pull, Totem Pole |
| Reset | Active High/Active Low | Active Low |
| Reset Timeout | 160ms Minimum | 140ms Minimum |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the key differences between the ADM708TARZ-REEL and the ADM709MAR?
The ADM708TARZ-REEL is a microprocessor supervisory circuit in an 8-lead SOIC package supplied on tape and reel, while the ADM709MAR is a microprocessor supervisory circuit in an 8-lead MSOP package supplied in tube form. Both are Analog Devices supervisor ICs, but they differ in package type, packing format, and specified temperature grade.
Do the ADM708TARZ-REEL and ADM709MAR have the same function?
Yes. Both are microprocessor supervisory circuits that monitor the power supply and generate a reset signal to the microprocessor during power-up, power-down, and brownout conditions. They also include a manual reset input and a watchdog timer function.
Are the ADM708TARZ-REEL and ADM709MAR pin-compatible?
No. The ADM708TARZ-REEL uses an 8-lead SOIC package, while the ADM709MAR uses an 8-lead MSOP package. These are different package footprints with different PCB land patterns, so they are not drop-in replacements without layout changes.
What is the difference in packing between the ADM708TARZ-REEL and the ADM709MAR?
The ADM708TARZ-REEL is supplied in tape-and-reel format, which is intended for automated pick-and-place assembly. The ADM709MAR is supplied in tube format, which is typically used for manual handling or low-volume prototyping.
Can the ADM708TARZ-REEL be used as a substitute for the ADM709MAR in an existing design?
Not directly. Because the two parts use different packages (SOIC vs. MSOP), substituting one for the other requires a PCB layout change to accommodate the different footprint. Electrical and functional compatibility should also be verified against the respective datasheets before substitution.
What supply voltage range do the ADM708TARZ-REEL and ADM709MAR support?
Both devices are designed for monitoring a single power supply in microprocessor systems. The exact supply voltage range and reset threshold options should be confirmed from the Analog Devices datasheet for each specific part number, as threshold variants exist within the ADM708/ADM709 families.
Do both parts include a watchdog timer and manual reset input?
Yes. The ADM708 and ADM709 families both integrate a watchdog timer and a manual reset input, in addition to the power supply monitoring and reset output functions. These features are common to the family, though the specific reset output configuration should be verified per part number.