Timing chips aid in-car connectivity

Two MEMS-based oscillators, the SiT1623 and SiT1625 from SiTime, provide a high-temperature, low-power timing reference for automotive connectivity protocols. Both of the AEC-Q100 qualified devices perform under extreme conditions and provide the robust system performance and stability required in harsh automotive environments.

Grade 1 oscillators operate over a temperature range of -40°C to +125°C and can be used for automotive ADAS, electronic control units, and infotainment systems. The SiT1623 offers 9 commonly used fixed frequencies between 8 MHz and 50 MHz, while the SiT1625 offers a choice of 12 fixed frequencies between 8 MHz and 100 MHz. Frequency stability for both parts is ±25 PPM (85°C), ±30 ppm (105°C), and ±50 ppm (125°C). RMS phase jitter is 750 fs for the SiT1623, dropping to 500 fs for the SiT1625.

The SiT1623 and SiT1625 consume 1.8 mA and 2.3 mA, respectively, when operating at 1.8 V. Four industry-standard packaging options are available: 1.6×1.2 mm, 2.0×1.6 mm, 2.5×2.0 mm, and 3.2×2.5 mm.

Engineering samples of the SiT1623 and SiT1625 oscillators are available now to qualified customers. General sampling will be available in July 2023. Volume production is expected in early 2024.

SiT1623 product page

SiT1625 product page

SiTime

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