Part A
ADM705AR
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2558 Stückzahl
- Package
- SOIC-8
- Series
- PMIC-Kontrolleure
Replacement verdict
Compatible functional replacement candidate
The ADM705AR and ADM705AR-REEL7 are functionally identical supervisory ICs from the same manufacturer, differing only in packaging format. The REEL7 variant is the tape-and-reel delivery option of the same device, making it a direct drop-in replacement for automated assembly lines.
Function Type
High match
Package Type
High match
Electrical Specifications
High match
Pin Configuration
High match
Parts at a glance
Part B
ADM705AR-REEL7
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 350 Stückzahl
- Package
- SOIC-8
- Series
- PMIC-Kontrolleure
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-REEL7 | Why it matters |
|---|---|---|---|
| Manufacturer | Analog Devices Inc. | Analog Devices Inc. | Same manufacturer ensures identical silicon design and process, confirming functional equivalence. |
| Function | Microprocessor Supervisory Circuit (reset generator) | Microprocessor Supervisory Circuit (reset generator) | Both parts perform the same supervisory function, which is the primary basis for substitutability. |
| Reset Threshold Voltage | 4.65 V (typical) | 4.65 V (typical) | The threshold determines the supply voltage at which a reset is asserted; matching values ensure identical system 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 components. |
| Watchdog Timer | Yes (1.6 s typical timeout) | Yes (1.6 s typical timeout) | Watchdog functionality and timeout must match so firmware supervision behaves identically. |
| Manual Reset Input | Yes | Yes | Presence of a manual reset input affects board-level reset control and must be consistent. |
| Supply Voltage Range | 1.0 V to 5.5 V | 1.0 V to 5.5 V | Operating voltage range must match to ensure the part works in the target system's power domain. |
| Package / Mounting | 8-SOIC (Surface Mount) | 8-SOIC (Surface Mount) | Identical package and footprint allow drop-in replacement on the same PCB. |
| Packaging / Delivery Form | Tube / bulk | Tape and reel (7-inch reel) | Delivery form differs, affecting automated assembly handling but not electrical function; the -REEL7 suffix denotes reel packaging. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | ADM705AR | ADM705AR-REEL7 |
|---|---|---|
| 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-REEL7?
Both parts are the same ADM705 microprocessor supervisory circuit in an 8-lead SOIC package. The difference is packaging format: ADM705AR is supplied in tube or standard bulk packaging, while ADM705AR-REEL7 is supplied on a 7-inch tape-and-reel carrier for automated pick-and-place assembly. Electrical and functional specifications are identical.
Are ADM705AR and ADM705AR-REEL7 electrically and functionally interchangeable?
Yes. Both order codes refer to the same ADM705 die and package. The -REEL7 suffix only denotes tape-and-reel packing, so the devices are interchangeable in circuit design; only the assembly feed method differs.
What are the key supervisory functions of the ADM705?
The ADM705 provides power-on reset, a reset output that remains asserted while VCC is below the reset threshold, a manual reset input, and a watchdog timer input. It also includes a 1.6 s typical watchdog timeout and an active-low RESET output. These functions monitor microprocessor supply voltage and program execution.
What is the reset threshold voltage of the ADM705?
The ADM705 has a reset threshold of 4.65 V typical for 5 V systems. The RESET output is guaranteed to be logic low while VCC is below this threshold, ensuring the microprocessor is held in reset during undervoltage conditions.
What package do ADM705AR and ADM705AR-REEL7 use?
Both parts are offered in an 8-lead SOIC package (often designated R-8 or SOIC-8). The package outline, pinout, and PCB land pattern are identical between the two order codes.
Why would a designer choose ADM705AR-REEL7 over ADM705AR?
ADM705AR-REEL7 is intended for high-volume automated assembly lines that use tape-and-reel feeders. ADM705AR in tube or bulk form is typically used for prototyping, low-volume runs, or manual assembly. The choice is purely a manufacturing logistics decision.
Do ADM705AR and ADM705AR-REEL7 differ in operating temperature range or supply voltage?
No. Both order codes share the same operating temperature range and supply voltage specifications because they are the same device. The ADM705 operates from a 5 V supply and is specified over the industrial temperature range. The -REEL7 suffix does not alter these ratings.