SC9257S

SC9257 PLL FOR DIGITAL TUNING SYSTEM DESCRIPTION The SC9257 is phase-locked loop (PLL) LSIs for digital tuning systems (DTS) with built in 2 modulus prescalers. The LSIs are used to configure high-performance digital tuning systems, such as radio/cassette players. They allow high-performance AM/FM tuners to be implemented easily DIP-20-300-2.54 FEATURES * Available in DIP20, SOP20 packages. * High speed programmable dividers. SOP-20-300-1.27 — FMIN: 30 to 150 MHz ..........(with 2 modulus prescaler) — AMIN: 0.5 to 40 MHz .......( with 2 modulus prescaler or direct dividing ) * 16-bit programmable counter, dual parallel output phase * Turns off FM, AM and IF amps when Standby mode function comparator, crystal oscillator and reference counter. * Serial data input and interface * Uses 3.6MHz, 4.5MHz, 7.2MHz or 10.8MHz crystal oscillators (CE,CK,DA). * Has 15 reference FM and AM frequencies : 0.5K, 1K, 2.5K, 3K, * Supply voltage : 4.5 to 5.5 V 3.125K, 3.90625K, 5K, 6.25K,...