Part A
ADM709LARZ
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 6460 個数
- Series
- 電源管理 (PMIC) - スーパーバイザ
Replacement verdict
Compatible functional replacement candidate
The ADM709LARZ and ADM706AR-REEL are both microprocessor supervisory circuits from Analog Devices in the same SOIC-8 package family, sharing core reset and watchdog functionality. However, they differ in reset threshold voltage, reset output stage configuration, and watchdog timeout period, so the ADM709LARZ is a functional candidate rather than a guaranteed drop-in substitute for the ADM706AR-REEL. Designers should validate threshold, output drive, and timing against the target application before substitution.
Reset Threshold Voltage
Validation required
Reset Output Type
Validation required
Package Type
High match
Watchdog Timeout
Validation required
Parts at a glance
Part B
ADM706AR-REEL
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 3653 個数
- Package
- SOIC-8
- Series
- PMIC - スーパーバイザ
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | ADM709LARZ | ADM706AR-REEL | Why it matters |
|---|---|---|---|
| Reset Threshold Voltage | 4.65 V (L version) | 4.40 V (R version) | Determines the supply voltage at which a reset is asserted; a different threshold changes when the system detects an out-of-tolerance supply, affecting brownout behavior. |
| Reset Output Type | Active-low push-pull (RESET) | Active-low push-pull (RESET) plus active-high (RESET-bar complementary) | The available reset polarity and drive style must match the processor's reset input; differing output configurations affect direct substitutability. |
| Manual Reset Input | Yes (MR) | Yes (MR) | A manual reset pin allows external system reset; both provide it, so this function is compatible. |
| Watchdog Timer | Yes (WDI, 1.6 s typical) | Yes (WDI, 1.6 s typical) | The watchdog monitors processor activity and asserts reset on a hang; matching timeout behavior supports equivalent supervision. |
| Supply Voltage Range | 4.75 V to 5.5 V | 4.75 V to 5.5 V | Defines the operating supply window; identical ranges mean both suit the same 5 V rail conditions. |
| Reset Timeout Delay | 200 ms typical | 200 ms typical | The reset hold time after supply recovery must be long enough for the processor to stabilize; matching delays preserve timing compatibility. |
| Package | 8-lead SOIC (N) | 8-lead SOIC (R) | Package footprint and pinout must match for board-level drop-in replacement; both are 8-lead SOIC but pinouts differ between families. |
| Pin Count | 8 | 8 | Pin count affects footprint compatibility; both are 8-pin devices, though pin assignments must still be verified. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | The temperature range must cover the application environment; identical industrial ranges support equivalent use. |
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 | ADM709LARZ | ADM706AR-REEL |
|---|---|---|
| Part Status | Active | Obsolete |
| Type | Simple Reset/Power-On Reset | Simple Reset/Power-On Reset |
| Number of Voltages Monitored | 1 | 1 |
| Voltage - Threshold | 4.65V | 4.4V |
| Output | Push-Pull, Totem Pole | Push-Pull, Totem Pole |
| Reset | Active Low | Active Low |
| Reset Timeout | 140ms Minimum | 160ms Minimum |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount | Surface Mount |
| Base Product Number | ADM709 | - |
| Digi Key Programmable | Not Verified | - |
| Packaging | Tube | - |
Frequently asked questions
What are the key differences between the ADM709LARZ and the ADM706AR-REEL?
The ADM709LARZ is a microprocessor supervisory circuit in an SOIC-8 package, while the ADM706AR-REEL is a similar supervisory circuit supplied in tape-and-reel packaging. Both monitor power supplies and generate reset signals, but they differ in package, packaging format, and specific threshold/feature options as defined in their respective Analog Devices datasheets.
Are the ADM709LARZ and ADM706AR-REEL pin-compatible?
Both devices are offered in 8-lead packages, but pin compatibility must be confirmed against the official Analog Devices datasheets for each specific part number, since pin functions and reset output configurations can differ between the ADM709 and ADM706 families.
What is the difference in packaging between the two parts?
The ADM709LARZ is supplied in tube or standard SOIC-8 packaging, while the ADM706AR-REEL is supplied on tape-and-reel for automated pick-and-place assembly. The "REEL" suffix indicates the tape-and-reel delivery format.
Do both parts provide a reset output for microprocessor supervision?
Yes. Both the ADM709 and ADM706 families are microprocessor supervisory circuits that generate a reset signal to hold a processor in a known state during power-up, power-down, or brownout conditions, as documented in the Analog Devices datasheets.
Can the ADM706AR-REEL be used as a drop-in replacement for the ADM709LARZ?
Direct substitution should only be attempted after verifying reset threshold voltage, reset output type (active-low or active-high), package pinout, and timing specifications against both Analog Devices datasheets. Differences in these parameters may require design changes.
What supply voltage range do these supervisory circuits support?
Both the ADM709 and ADM706 are designed for monitoring standard logic and microprocessor supply voltages. The exact operating voltage range and reset threshold options must be confirmed from the official Analog Devices datasheet for each specific part number.
Which part is better suited for high-volume automated assembly?
The ADM706AR-REEL, because its tape-and-reel packaging is optimized for automated pick-and-place production lines, whereas the ADM709LARZ in standard packaging is more typical for prototyping or lower-volume runs.