The HT70xxA-2 series devices area set of three terminal low power voltage detectors implemented in CMOS technology.The Holtek HT70xxA‑2 series are low-power, three-terminal voltage detector ICs built using CMOS technology. Designed to monitor fixed threshold voltages (approximately 2.2 V to 8.2 V depending on variant), they are ideal for applications such as battery voltage monitoring, microcontroller reset circuits, and non-volatile memory backup. With a high input voltage tolerance (up to 30 V) and ultra-low quiescent current (~3 μA typical), these devices provide reliable voltage detection with built-in hysteresis for stable operation in noisy environments. Available in compact packages including SOT23 and SOT89, the HT70xxA‑2 series is suitable for space-constrained embedded systems and portable electronics.