MICRO CRYSTAL
芯片, 实时时钟, I2C, RV-4162, 20PPM, 8SON
INTERSIL
芯片, CMOS, 可编程内部定时器
TEXAS INSTRUMENTS
REAL TIME CLOCK-RTC, BCD, 32 X 8, LCC-28
CYPRESS SEMICONDUCTOR
芯片, 时钟缓冲器, 80MHZ, LCC-32
ON SEMICONDUCTOR
芯片, ECL 100 逻辑器件
差动时钟驱动电路