OVERVIEW

The SM5050A is a single-output clock generator IC that generates standard high-frequency clocks derived from a 20 to 40MHz crystal oscillator master clock. The high-frequency output stage uses optimized PLL circuits for low jitter output. The oscillator capacitors CG and CD are built-in, realizing a high-frequency output oscillator by just the connection of a crystal. Two program inputs allows selection from 4 frequency multipliers, making the SM5050A able to generate multi-standard frequency clock outputs.

FEATURES

■ 2.7 to 3.6V operating supply voltage

■ 20 to 40MHz master clock frequency (fundamental)

■ Output frequency ranges

• 100 to 166.6MHz (VDD = VDDQ = 3.0 to 3.6V)

• 100 to 125MHz (VDD = VDDQ = 2.7 to 3.6V)

■ 8mA output drive capability

■ Oscillator capacitors (CG, CD) and feedback resistor (Rf) built-in

■ 100ps (typ) low jitter output (peak-to-peak)

■ 2 program inputs for 4 selectable multiplier ratios

■ Standby function

■ Packaging

• Chip form (CF5050A)

• 8-pin VSOP package (SM5050AV)