Features and Benefits
- Accurate monitoring of up to four power supply voltages
- 6 factory-set threshold options: −5.0 V, 1.8 V, 2.5 V, 3.0 V, 3.3 V, and 5.0 V
- Adjustable input threshold options: −0.5 V (±2.0% accuracy), 0.62 V (±0.8% accuracy), and 1.23 V
- 200 ms typical reset timeout
- Open-drain RESET output (10 μA internal pull-up)
- Reset output stage: active low, valid to IN1 = 1 V or IN2 = 1 V
- Low power consumption (55 μA)
- Glitch immunity
- Specified from −40°C to +85°C
The ADM6339 is a high accuracy supervisory circuit capable of monitoring up to four system supply voltages.
The ADM6339 incorporates a variety of internally pretrimmed undervoltage threshold options for monitoring −5.0 V, 1.8 V, 2.5 V, 3.0 V, 3.3 V, and 5.0 V supply voltages. Tolerance levels of ±5% and ±10% are available. The device is also available with one to three adjustable threshold options. The adjustable voltage threshold options are 1.23 V, 0.62 V, and −0.5 V. See the Ordering Guide section for a list and description of all available options.
If a monitored power supply voltage decreases below the minimum voltage threshold (or rises above the maximum voltage threshold for the −0.5 V and −5.0 V input options), a single active low output asserts, triggering a system reset. The output is open drain with a weak internal pull-up to the monitored IN2 supply of typically 10 μA. After all voltages exceed the selected threshold level, the reset signal remains low for the reset timeout period (200 ms typical).
The ADM6339 output remains valid as long as IN1 or IN2 exceeds 1 V. Unused monitored inputs should not be allowed to float or to be grounded; instead, they should be connected to a supply voltage greater than their specified threshold voltages.
The ADM6339 is available in a 6-lead SOT-23 package. The device operates over the extended temperature range of −40°C to +85°C.
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Documentation & Resources
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
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