ABS04W 32.768kHz 4-Pad IoT Optimized SMD Crystals Abracon ABS04W 32.768kHz 4-Pad IoT Optimized SMD Crystals are tuning fork crystals in a small (1.20mm x 1.00mm x 0.35mm) package. ABS04W is ideal for space-constrained Internet of Things (IoT), wearables, and wireless applications. These Abracon 32.768kHz crystals are optimized for low plating load and ESR over an extended temperature range. The components provide enhanced performance for start-up times and power savings with low-energy SOCs.