Part A
ADM705AR
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2558 PCS
- Package
- SOIC-8
- Series
- PMIC - Supervisores
Replacement verdict
Compatible functional replacement candidate
The ADM706PARZ-REEL is a compatible functional replacement candidate for the ADM705AR, sharing the same supervisory function, reset output topology, and supply voltage range, while differing in reset threshold accuracy and package options. Designers should validate the tighter threshold tolerance and confirm the RoHS-compliant SOIC-8 package against their specific application requirements before substitution.
Function Type
High match
Reset Output Type
High match
Supply Voltage Range
High match
Reset Threshold Accuracy
Validation required
Parts at a glance
Part B
ADM706PARZ-REEL
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5683 PCS
- Package
- SOIC-8
- Series
- PMIC - Supervisores
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 | ADM706PARZ-REEL | Why it matters |
|---|---|---|---|
| Reset Threshold Voltage (typ) | 4.65 V | 2.63 V | Determines the supply voltage at which the supervisor asserts reset; the two parts monitor different nominal rails (5 V vs 3 V/3.3 V systems), so they are not directly substitutable. |
| Nominal Monitored Supply | 5 V | 3 V / 3.3 V | The device must match the logic supply rail of the system being supervised; a mismatch causes false or missed resets. |
| Reset Output Type | Active-low push-pull | Active-low push-pull | Push-pull outputs drive the reset line directly without an external pull-up, but cannot be wire-ORed; both parts share this behavior so interfacing style is consistent. |
| Manual Reset Input | Yes | Yes | A dedicated manual reset pin allows system-level reset assertion; both devices provide it, preserving board-level reset architecture. |
| Watchdog Timer | Yes (1.6 s typ) | Yes (1.6 s typ) | The watchdog monitors processor activity and forces reset on a hang; matching timeout behavior keeps firmware timing requirements unchanged. |
| Reset Timeout Period (typ) | 200 ms | 200 ms | Defines how long reset stays asserted after the supply recovers; identical timing ensures the processor has adequate startup time in both cases. |
| Supply Voltage Range | 4.75 V to 5.5 V | 1.0 V to 5.5 V | Operating range must cover the system rail; the wider low-voltage range of the ADM706P suits 3 V systems while the ADM705 targets 5 V rails. |
| Supply Current (typ) | 190 µA | 190 µA | Quiescent current affects standby power budget; equivalent consumption means no power-budget redesign is needed. |
| Package | 8-lead SOIC (N) | 8-lead SOIC (N), tape and reel | Footprint and assembly compatibility depend on package; both use the same 8-lead SOIC body, though the reel variant suits automated high-volume placement. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Industrial temperature coverage ensures reliable operation across environments; identical ratings mean no derating differences between the parts. |
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 | ADM705AR | ADM706PARZ-REEL |
|---|---|---|
| Part Status | Obsolete | Active |
| Type | Simple Reset/Power-On Reset | Simple Reset/Power-On Reset |
| Number of Voltages Monitored | 1 | 1 |
| Voltage - Threshold | 4.65V | 2.63V |
| 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 are the primary differences between the ADM705AR and ADM706PARZ-REEL?
The ADM705AR is a microprocessor supervisory circuit in an 8-lead SOIC package with an active-low reset output and a manual reset input, specified over the 0°C to +70°C commercial temperature range. The ADM706PARZ-REEL is a related supervisory circuit in an 8-lead SOIC package supplied in tape-and-reel form, featuring an active-low push-pull reset output and a watchdog timer input, specified over the −40°C to +85°C industrial temperature range. The two devices differ in reset output configuration, watchdog functionality, and rated temperature range.
Do the ADM705AR and ADM706PARZ-REEL have the same reset threshold voltage?
No. The ADM705AR has a reset threshold of 4.65 V (typical) for 5 V supply monitoring, while the ADM706PARZ-REEL has a reset threshold of 2.63 V (typical) for 3 V/3.3 V supply monitoring. The threshold suffix in each part number designates the monitored supply voltage, so they are not interchangeable for the same rail.
Are the ADM705AR and ADM706PARZ-REEL pin-compatible?
Both devices are offered in an 8-lead SOIC package, but pin functions differ. The ADM705AR provides a manual reset input (MR) and an active-low reset output (RESET). The ADM706PARZ-REEL provides a watchdog input (WDI) and an active-low push-pull reset output. Because the pin assignments and functions are not identical, a direct drop-in substitution should not be assumed without verifying the pinout against the respective datasheets.
What is the difference in reset output type between the two parts?
The ADM705AR uses an active-low reset output that requires an external pull-up resistor. The ADM706PARZ-REEL uses an active-low push-pull reset output, which drives both high and low levels without an external pull-up. This affects board-level design, power consumption, and interfacing with the monitored processor.
Does the ADM706PARZ-REEL include a watchdog timer that the ADM705AR lacks?
Yes. The ADM706PARZ-REEL includes a watchdog timer input (WDI) that monitors processor activity and asserts reset if the processor fails to toggle the watchdog input within the timeout period. The ADM705AR does not include a watchdog timer; instead it provides a manual reset input for external system reset control.
What are the operating temperature ranges for the ADM705AR and ADM706PARZ-REEL?
The ADM705AR is specified for the commercial temperature range of 0°C to +70°C. The ADM706PARZ-REEL is specified for the industrial temperature range of −40°C to +85°C. Designs requiring operation below 0°C or above +70°C should use the industrial-grade device.
What supply voltage does each device monitor?
The ADM705AR monitors a 5 V supply with a 4.65 V typical reset threshold. The ADM706PARZ-REEL monitors a 3 V or 3.3 V supply with a 2.63 V typical reset threshold. Selection should be based on the nominal supply rail of the system being supervised.
Is the ADM706PARZ-REEL supplied in a different packaging format than the ADM705AR?
Yes. The ADM706PARZ-REEL is supplied in tape-and-reel packaging (indicated by the REEL suffix) intended for automated pick-and-place assembly. The ADM705AR is supplied in standard tube or tray packaging. Both are offered in the 8-lead SOIC package, but the delivery format differs for production handling.