220 MHz to 920 MHz, AEC-Q100 Ultra-low Jitter 125°C Differential Oscillator for Automotive


The SiT9397 is an AEC-Q100 qualified, ultra-low jitter differential oscillator engineered for automotive applications up to 125°C ambient temperature. It delivers exceptional dynamic performance of 150 fs (typ.) jitter and frequency stability as good as ±25 ppm in the presence of common automotive environmental stressors such as shock, vibration, rapid thermal transients, and power supply noise. The SiT9397 is available in the industry smallest 2.0 x 1.6 mm package in addition to 2.5 x 2.0 mm and 3.2 x 2.5 mm options.

The SiT9397 can be factory programmed for specific combinations of frequency, stability, voltage, output signaling, and pin 1 functionality. Programmability enables automotive system designers to qualify the device once and use it for different applications. It also eliminates the long lead times and customization costs associated with quartz devices where each combination is custom-built.

This device comes with a unique FlexSwing™ output driver that performs like LVPECL but provides independent control of voltage swing and DC offset. It is designed to interface with chipsets having non-standard input voltage requirements and eliminate all external source-bias resistors. It also integrates multiple on-chip regulators to filter power supply noise, eliminating the need for an external dedicated LDO.

"Specs" "Value"
Frequency 220 to 920 MHz
Frequency Stability (ppm) ±25 (105ºC), ±30 (125ºC), ±50 (125ºC)
Operating Temperature Range (°C) -40 to +85, -40 to +105, -40 to +125
Package Type (mm²) 2.0 x 1.6, 2.5 x 2.0, 3.2 x 2.5
Oscillator Type Differential
Phase Jitter (rms) 150 fs
Pin1 Feature NF (no function), OE active high, OE active low
Voltage Supply (V) 1.8, 2.5, 3.3, 2.25 to 3.63 , 1.71 to 3.63
Features Ultra-low jitter, small size, 125°C
Availability Pre-production Sampling; Contact SiTime for ±20 ppm stability and better

High performance

  • 150 fs jitter (typ.)
  • ±30 ppm (up to -40 to 125ºC) or ±25 (up to -40 to 105ºC): Ensures best system performance in hostile environments (contact SiTime for ±20 ppm)

20x better vibration sensitivity

  • Minimizes packet loss in high-vibration environments

Power supply noise immunity

  • 12 fs/mV (typ.)

  • Simplify power supply design

2.0 x 1.6 mm package

  • Enables small form-factor system with stringent jitter requirement

Flexible programmable features

  • 220 to 920 MHz
  • 1.71 to 3.63
  • LVPECL, LVDS, HCSL, Low-power HCSL, and FlexSwing signaling options: Customized oscillator specifications for optimal system performance;

Superior reliability

  • 2.2 billion hours MTBF
  • Lifetime warranty: Reduces field failures due to clock components and associated repair costs
  • ADAS Computers
  • Radar
  • Infotainment
  • LiDAR & Radar
  • In-vehicle 10/40/100 Gbps Ethernet
  • Collision Detection Devices
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