Selecting the right crystal is crucial for system performance and reliability. This guide walks through the XGHC crystal portfolio and provides selection criteria based on application requirements.

Crystal Type Selection

Crystal Resonators (Quartz Crystals)

Best for: Cost-sensitive designs, microcontroller clock, general timing applications
  • Frequency range: 3.2MHz to 100MHz
  • Package options: HC-49/S, 3225, 2520, 2016, 1612
  • Frequency tolerance: ±10ppm to ±50ppm
  • Temperature range: -40°C to +125°C
  • Load capacitance: 6pF to 32pF

Standard Crystal Oscillators (SPXO)

Best for: Easy integration, guaranteed startup, moderate stability requirements
  • Frequency range: 1MHz to 200MHz
  • Supply voltage: 1.8V, 2.5V, 3.3V, 5.0V
  • Frequency stability: ±25ppm to ±100ppm
  • Output: CMOS, LVCMOS
  • Temperature range: -40°C to +85°C

Temperature Compensated Oscillators (TCXO)

Best for: High stability requirements, communication systems, GPS applications
  • Frequency range: 1MHz to 100MHz
  • Frequency stability: ±0.5ppm to ±2.5ppm
  • Temperature range: -40°C to +85°C
  • Low power options available

Voltage Controlled Oscillators (VCXO)

Best for: Frequency tuning, PLL applications, clock synchronization
  • Pullability: ±50ppm to ±200ppm
  • Linearity: ±10% typical
  • Applications: PLL, clock recovery, frequency synthesis

Key Selection Parameters

  • Frequency - match to system requirements (common: 8MHz, 16MHz, 25MHz, 32.768kHz)
  • Frequency stability - ppm tolerance based on application needs
  • Package size - HC-49/S for through-hole, SMD for automated assembly
  • Temperature range - commercial (0°C to +70°C) or industrial (-40°C to +85°C)
  • Load capacitance - for resonators, match to circuit design
  • Supply voltage - for oscillators, match to system voltage
  • Phase noise/jitter - critical for high-speed communication
  • Aging - long-term frequency drift specification

    • Contact LiTong's application engineering team for personalized selection assistance.