AMEYA丨ST launches Automotive ultra-low power

　　SiT1881 is an ultra-low power automotive-qualified 32-kHz oscillator (XO), designed for ±50 ppm operation up to 105°C. It is a programmable oscillator with a default frequency of 32.768 kHz with the ability to support 17 other frequencies from 1 Hz to 262.144 kHz. The SiT1881 XO is SiTime’s lowest power XO with a no-load current of only 490 nA. 

       Furthermore, it eliminates any requirement for load capacitors and comes in a small 1.2 X 1.1 mm QFN package. This enables up to 75% smaller footprint compared to 2.0 x 1.2 mm SMD crystal. The SiT1881 can drive up to 100 pf of load, which provides additional system savings by eliminating multiple 32.768 kHz crystals in a design. This device also introduces an innovative new Reduced Swing technology to further minimize overall system power.

　　Features：

　　Factory programmable down to 1 Hz

　　Significantly reduces power compared to fixed 32.768 kHz XTALs

　　Ultra-low Power: 490 nA (typ.)

　　Extends battery life

　　Operates down to 1.14 V

　　Supports coin-cell or supercap battery backup

　　Reduced Swing technology

　　Programmable output swing down to 0.6 V minimizes power

　　Small footprint: 1.2 x 1.1 mm

　　Saves board space compared to the 2012 SMD XTALs

　　Drives multiple loads up to 100 pf

　　One SiT1811 can replace multiple quartz XTALs

　　No load or VDD filtering capacitors

　　Eliminates any external capacitors, further reducing board space

　　Eliminates load-dependent startup issues

　　±50 ppm frequency stability over -40 °C to +105 °C temp. range

　　Better stability compared to quartz XTALs

　　Improves wireless connectivity and RTC accuracy

　　Applications：

　　ADAS ECU

　　Infotainment

　　Smart mirror

　　Industrial applications