W155 Description
USB Clock Output/Modulation Width Selection Input:.
W155 Key Features
- Generates a spread spectrum timing signal (SYSCLK) and a non-spread signal (USBCLK)
- Requires a 14.318-MHz crystal for operation
- Supports MIPS microprocessor clock frequencies
- Reduces peak EMI by as much as 12 dB
- Integrated loop filter ponents
- Cycle-to-cycle jitter = 250 ps (max)
- Operates with a 3.3 or 5.0V power supply
- Spread output is selectable from 10 to 133 MHz
- TEST mode supports modulation off (High-Z) and special test input reference frequency
- Guaranteed 45/55 duty cycle