kHz xtal, the OLD µA IoT • Wearables kHz MEMS OSC, the NEW Offered with both temperature stabilized (±75ppm or ±100ppm over -40°C to +85°C) version and temperature compensated (±5ppm, ±10ppm or ±20ppm over -40°C to +85°C) version; this series offers designers great flexibility to replace a typical tuning fork watch crystal with a precise 32.768kHz clocking solution. Number of Devices Initial Tolerance Histogram Initial Tolerance (ppm) TA = 25˚C Post Reflow Frequency Stability vs. Operating Temperature Range Frequency Stability (PPM) Abracon has introduced its new series of watch-MEMS® kHz MEMS oscillators, featuring the World’s Smallest CSP (1.5x0.8mm) & SMD (2.0x1.2 mm) packages. This series is based on a proprietary MEMS resonator technology, yielding best-in-class kHz timing reference. These devices are ideally suited for tuning fork crystal replacement in space constrained designs. Optimized for the Wearable, IoT & Consumer solutions, these devices provide temperature stabilized alternative to tuning fork crystal based timing, while eliminating the oscillator loop capacitors, saving significant surface area, complexity & frequency variation over temperature. Temperature (˚C) Series Description Package Size ASTMTXK Temperature compensa ted, ultra miniature 32.768kHz MEMS oscillator 1.54 x 0.84 x 0.6mm ASTMKH Low -power, ultra -miniature 32.768kHz MEMS oscillator, with ASTMK Programmable Output Swing Programmable Output Swing Low -power, ultra -miniature 1Hz ~ 32.768kHz MEMS oscillator, with Programmable Output Swing ASTMK 06 Low -power, ultra -miniature 32.768kHz MEMS oscillator Vdd = 3.63V 1.54 x 0.84 x 0.6mm Vdd = 1.5 - 1.8V Temperature (˚C) 2.0 x 1.2 x 0.6mm Start-up Time 1.54 x 0.84 x 0.6mm 2.0 x 1.2 x 0.6mm Voltage (V) ASTMKJ Low -power, ultra -miniature 3 2.768kHz MEMS oscillator, with Core Cureent (uA) Core Current vs Operating Temperature Range 2.0 x 1.2 x 0.6mm Time (sec) LLC kHz xtal, the OLD µA IoT • Wearables kHz MEMS OSC, the NEW Why should designers consider watch-MEMS® for RTC Timing!! R (Feedback) Typical Pierce Oscillator Loop for RTC applications Integrated Inverter Loop Capacitor #1 Loop Capacitor #2 Tuning Fork Quartz Crystal • Uses a Tuning Fork Quartz Crystal • Requires (2) oscillator loop capacitors • Set-tolerance is contingent upon accurately matching the crystal plating load to the capacitance of the oscillator loop, best-case ±10 ppm • Frequency stability over -40°C to +85°C is worse than ±175 ppm • Total solution consumes the following surface area: 8 mm2 consumes 5 mm2 consumes GND using 3.2 x 1.5mm (Crystal) using 2.0 x 1.2mm (Crystal) 3 mm2 consumes using 1.6 x 1.0mm (Crystal) 32.kHz CLK Pierce Oscillator Loop using watch-MEMS® • No oscillator loop capacitors are needed • No by-pass capacitor is needed • Set-tolerance is typically better than ±5 ppm for temperature stabilized version and better than ±2.5 ppm for TCXO version • Frequency stability over -40°C to +85°C is typically better than ±50ppm for temperature stabilized version and ±5 pp maximum for TCXO version • ASTMK series is available with Factory Programmable Output Swing, enabling it to be the drop-in replacement for Tuning Fork Crystals • Total solution consumes the following surface area: 80% smaller than 2.0 x 1.2mm SMD Quartz Solution LLC 60% smaller than 1.6 x 1.0mm SMD Quartz Solution