Precision Timing for Automotive ECU Systems
MEMS timing enables low-jitter, reliable clocking for high-performance automotive ECUs
Automotive ECUs require low-jitter, stable and safe timing to support complex SoCs, high-speed interfaces and meet stringent functional safety requirements. MEMS oscillators deliver high reliability, temperature stability, and resilience to electrical & magnetic noise in harsh automotive environments.
Automotive electronic control units (ECUs) manage critical vehicle functions, from powertrain and infotainment to ADAS and autonomous systems. As vehicle architectures shift from distributed to zonal or centralized designs, ECUs increasingly rely on high-speed interfaces such as single wire SerDes, Ethernet and PCIe. These systems require low-jitter, highly stable clocks to maintain signal integrity and meet functional safety targets.
MEMS timing solutions address these requirements by delivering high accuracy and excellent stability over temperature, along with robust performance under shock, vibration, and electromagnetic interference (EMI). This supports reliable, low-error operation in safety-critical automotive systems.
Features
- Low-jitter clocking supporting high-speed interfaces such as PCIe and 10 Gb Ethernet
- Stable frequency across extended temperature ranges, up to -40°C to +125°C
- High resilience to shock, vibration, and electromagnetic interference (EMI)
- Differential oscillators with <150 fs RMS jitter for high-speed interfaces
- Small footprint and low power consumption for space-constrained ECUs
- Products with FailSafeTM features with advanced end-to-end diagnostics for functional safety, with a functional-safety focused roadmap
Applications
- ADAS computing and infotainment systems
- Telematics, vehicle positioning, and in-vehicle networking (Serdes, Ethernet)
- ADAS sensors (Lidar, radar, cameras, ultrasonic)
- Safety critical ECUs (Battery management, powertrain, passive safety)
- Legacy ECUs converted to zonal Ethernet via 10BASE-T1S/RMII interfaces
Key components
- MEMS oscillators (XOs), including SiT8924, SiT9025, and SiT1625
- Differential MEMS oscillators, including SiT9396 and SiT9397
- Super-TCXO MEMS oscillators, including SiT5386 and SiT5387
- Clock Generators, including SiT91281, SiT91283 and SiT91288
Benefits
- Improves functional safety metrics with higher reliability and lower FIT rates
- Maintains signal integrity in high-speed automotive interfaces through low-jitter clocking
- Ensures stable operation across wide temperature ranges and harsh environmental conditions
- Reduces error rates caused by vibration-induced jitter in quartz-based solutions
- Enables flexible frequency selection with short lead times for automotive applications
