Key facts
- Brand
- Analog Devices
- Model
- ADM698
- Industry
- Industrial
- Documents
- 2
- Languages
- EN
- Last added
- 2012-05-04
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Analog Devices ADM698/ADM699 Supervisory Circuit Datasheet
The ADM698 and ADM699 are microprocessor supervisory circuits that monitor a 5 V supply (VCC) and generate a reset pulse during power‑up, power‑down, brown‑out, or when the watchdog timer expires. The ADM698 provides voltage monitoring only, while the ADM699 adds a watchdog input to detect processor activity. Both devices guarantee a reset output that stays low even when VCC drops to 1 V.
The devices are offered in 8‑pin plastic DIP and 16‑lead SOIC packages, with the SOIC version of the ADM699 providing additional active‑high reset and watchdog output pins. Detailed specifications include operating voltage range, supply current, reset thresholds, watchdog timeout periods, and pin‑out dimensions.
Analog Devices ADM698 specifications
| VCC Operating Voltage Range | 3.0 V – 5.5 V |
|---|---|
| Supply Current | 0.6 mA – 1.95 mA |
| Reset Threshold (typical) | 4.65 V |
| Watchdog Timeout Period (ADM699) | 1.0 s – 2.25 s |
| Reset Active Time | 140 ms – 280 ms |
Source: Analog Devices ADM698/ADM699 Supervisory Circuit Datasheet
All Analog Devices ADM698 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What voltage does the ADM698 monitor?
The ADM698 monitors the 5 V VCC supply and generates a reset when VCC falls below the 4.65 V threshold.
From: Analog Devices ADM698/ADM699 Supervisory Circuit Datasheet
How long is the reset output held low after power‑up?
The reset output remains low for a minimum of 140 ms after VCC rises above the reset threshold.
From: Analog Devices ADM698/ADM699 Supervisory Circuit Datasheet
What is the minimum supply voltage at which the RESET output remains functional?
The RESET output is guaranteed to stay low with Vcc as low as 1 V.
How long does the RESET output stay active after power‑up?
On power‑up, RESET stays low for a minimum of 140 ms after Vcc rises above the reset threshold.