SiTime, Silicon MEMS Oscillators and Clock Generators

SiT1533 Ultra-Low Power 32 kHz XTAL Replacement

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ace awards 2014The SiT1533 is an ultra-small and ultra-low power 32.768 kHz oscillator optimized for mobile and other battery-powered applications. The SiT1533 is pin-compatible and footprint compatible to existing 2012 XTALs when using the SiTime solder-pad layout (SPL). And unlike standard oscillators, the SiT1533 features NanoDrive™, a factory programmable output that reduces the voltage swing to minimize power. The 1.2V to 3.63V operating supply voltage range makes it an ideal solution for mobile applications that incorporate a low-voltage, battery-back-up source such as a coin-cell or super-cap.




Frequency Range (kHz) 32.768
Frequency Tolerance 20 PPM
Temp Range (°C) -10 to +70, -40 to +85
Supply Voltage (V) 1.2 - 3.63
NanoDrive™ Reduced Swing Output 250mV to 1.15V
Package LxWxH (mm) 2.0 x 1.2 x 0.6
Status Production
  • Smartphones
  • Tablets
  • e-Readers
  • Health and Wellness Monitors
  • Fitness Watches
  • Sport Video Camcorders
  • Wireless Keypads
  • Wireless Mouse Devices
  • Battery Management Timekeeping

Features Benefits
  • Small SMD package: 2.0 x 1.2mm (2012)
  • Pin-compatible to 2012 XTAL SMD
  • Ultra-low power: 900nA (typ)
  • Extends battery life
  • NanoDrive™ reduced swing oscillator output
  • Directly drives into MCU/PMIC/Chipset XTAL IN
  • Programmable swing minimizes power
  • Oscillator output is insensitive to load and operates with or without load capacitors
  • No load or Vdd filter capacitors
  • Eliminates all external capacitors
  • Eliminates load-dependent start-up issues common with quartz XTALs
  • Operates down to 1.2V
  • Supports coin-cell or supercap battery-backup
  • <100 PPM frequency stability over -40°C to +85°C temp range
  • 2x better stability than quartz XTAL
  • Improves system connectivity and RTC accuracy


Part number characters in blue represent the customer specific options. The other characters in the part number are fixed.


If you do not know the output voltage requirements to define the proper NanoDrive settings, we recommend the full-swing LCMOS output for initial evaluation.