µPower, 32.768 kHz Quartz XTAL Replacement


The 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 1.2 V to 3.63 V operating supply voltage range makes it an ideal solution for mobile applications that incorporate a low-voltage, battery-backup source, such as a coin cell or supercap.

View related products: 1 to 32.768 kHz | 1508 packageHigh temp | 4 ns phase jitter | ±50 ppm | 32 kHz lineup

"Specs" "Value"
Frequency 32.768 kHz
Frequency Stability (ppm) 75, 100, 250
Operating Temperature Range (°C) -10 to +70, -40 to +85
Package Type (mm²) 2.0x1.2
Oscillator Type 32kHz XO
NanoDrive™ 300mV to 700mV, full swing LVCMOS
Voltage Supply (V) 1.2 to 3.63
Features XTAL replacement
Availability Production

Small SMD package: 2.0 x 1.2 mm (2012)

  • Pin-compatible to 2012 XTAL SMD

NanoPower: 900 nA (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 startup issues common with quartz XTALs

Operates down to 1.2 V

  • 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


  • Smartphones
  • Tablets
  • e-Readers
  • Health & Wellness Monitors
  • Fitness Watches
  • Sport Video Camcorders
  • Wireless Keypads
  • Wireless Mouses
  • Battery Management Timekeeping
  • Medical Electronics
  • Retail Electronics
  • Asset Tracking
  • Consumer Electronics
  • Home Entertainment
  • AR / VR
  • Smart Home
  • Home Appliances

Evalutaion board (Contact SiTime) – SiT6096 (2012)

Reliability Calculator Get FIT/MTBF data for various operating

SMD 2012 4-Pins CSP 1508 4-Pins – Preview packages with QFN 3D step models

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