The ICL7665 is a low-power, high-precision voltage monitor chip produced by Maxim. It uses externally programmable thresholds and hysteresis outputs for µP voltage monitoring, low battery detection, power failure and brownout detection, battery backup switching and power supply fault monitoring.
The ICL7665 is a microprocessor voltage monitor that warns of over‑voltage and under‑voltage conditions. It operates from a supply voltage of 1.6 V to 16 V and draws a typical quiescent current of only 3 µA. The device includes a precision reference, two comparators, and programmable trip points set by external resistors.
The datasheet provides electrical characteristics, ordering information, pin configurations, and example circuits for fault monitoring, temperature alarms, and battery‑backup switching. It also outlines SCR latch‑up precautions and limits for safe operation.
| Quiescent Current | 3 µA typical |
|---|---|
| Threshold Accuracy (ICL7665A) | 2 % (typical) |
| Operating Temperature Range | 0 °C to +70 °C |
| Pin Package (ICL7665CPA) | 8‑lead Plastic DIP |
The ICL7665 typically draws 3 µA of quiescent current.
The ICL7665A provides a 2 % threshold accuracy.