The FS6370 is a CMOS clock generator IC designed to minimize cost and component count in a variety of electronic systems. Three EEPROM-programmable phase-locked loops (PLLs) driving four programmable muxes and post dividers provide a high degree of flexibility.
An internal EEPROM permits just-in-time factory programming of devices for end user requirements.

• Just-in-time customization of clock frequencies via internal non-volatile 128-bit serial EEPROM
• I2C-bus serial interface
• Three on-chip PLLs with programmable reference and feedback dividers
• Four independently programmable muxes and post dividers
• Programmable power-down of all PLLs and output clock drivers
• Tristate outputs for board testing
• One PLL and two mux/post-divider combinations can be modified via SEL_CD input
• 5 V to 3.3 V operation
• Accepts 5 MHz to 27 MHz crystal resonators