Faster GPS Signal Acquisition and Locking

17. Februar 2023, 9:21 Uhr | Heinz Arnold
© SiTime

Devices that use GPS signals can acquire and lock to GPS more quickly and securely with the 25x higher precision of SiTime´s new 32 kHz MEMS Super TCXO »SiT7910«.

The SiT7910 is part of the SiTime Endura ruggedized family for aerospace and defense applications and aiming at devices that use GPS signals such as ruggedized handheld radios, ground vehicles and sensors. »The GPS signal is ubiquitous and is a crucial part of national security, everyday communications, financial systems, and power grid operations,« said Piyush Sevalia, executive vice president of marketing at SiTime. »However, it is susceptible not just to environmental disruptions but also to jamming and spoofing. GPS modernization is a multibillion-dollar, multi-year effort to upgrade the system with better features, performance, and security. Instrumental to this modernization is precision timekeeping, which ensures the faster and more secure acquisition of, and locking to GPS signals, even in the harshest of environmental conditions.«

Key features of the Endura SiT7910 Super-TCXO

  • 32.768 kHz frequency
  • ±0.2 ppm frequency stability over -55°C to +105°C temperature range, up to 25x better than legacy quartz technology. The device maintains 1 second of accuracy for one year, vs. legacy quartz devices that can only maintain it for one to 14 days. 
  • Best-in-class 20 ppb/g g-sensitivity for resilience in high-vibration environments 
  • Ultra-low power consumption, typically 6.0 µA, for use in portable aerospace and defense electronics
  • ±5 ppm frequency aging over 20 years, maintains device performance over decades
  • 1.62 V to 3.63 V operating supply voltage range for design flexibility
  • Small 2.5 x 2.0 mm package for space-constrained applications
  • Pb-free, RoHS, and REACH compliant
  • Endura enhanced screening flow for high quality and reliability 

The SiT7910 is sampling now. Volume production for the Endura SiT7910 is expected in Q2, 2023.

According to Pyush  Sevalia the SiTime product portfolio currently addresses a SAM (served addressable market) of approximately 2 billion Dollar: »With products like Endura Super-TCXO and other recently introduced families, we are well on our way to growing our SAM to 4 billion by the end of 2024.«


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