SAA7157
FEATURES
- Clock generation suitable for digital TV systems (line-locked)
- PLL frequency multiplier to generate 4 times of input frequency
- Dividers to generate clocks LL1.5A, LL1.5B, LL3A and LL3B (4th and 2nd multiples of input frequency)
- PLL mode or VCO mode selectable
- Reset control and power fail detection
- Suitable for applications with feature box and picture memory GENERAL DESCRIPTION
The SAA7157 generates all clock signals required for a digital TV system suitable for the SAA715x family and the SAA7199B (DENC). The circuit operates in either the phase-locked loop mode (PLL) or voltage controlled oscillator mode (VCO). QUICK REFERENCE DATA SYMBOL VDDA VDDD IDDA IDDD VLFCO fi VI VO Tamb PARAMETER analog supply voltage (pin 5) digital supply voltage (pins 8, 17) analog supply current digital supply current LFCO input voltage (peak-to-peak value) input frequency range input voltage LOW input voltage HIGH output voltage LOW output voltage HIGH operating ambient...
