TC9256APG

• Suitable for use in digital tuning systems in high-fi tuners and car stereos.
• Built-in prescalers operate at an input frequency ranging from 30 to 150 MHz during FM_IN input (with two-modulus prescaler) and at 0.5 to 40 MHz during AM_IN input (with two-modulus prescaler or direct dividing)
• 16-bit programmable counter, dual parallel output phase comparator, crystal oscillator and reference counter
• 3.6 MHz, 4.5 MHz, 7.2 MHz or 10.8 MHz crystal oscillators can be used.
• 15 possible reference frequencies (when using 4.5 MHz crystal):ref. = 0.5 k, 1 k, 2.5 k, 3 k, 3.125 k, 3.90625 k, 5 k, 6.25 k, 7.8125 k, 9 k, 10 k, 12.5 k, 25 k, 50 k and 100 kHz.
• Built-in 20-bit general-purpose counter for such uses as measuring intermediate frequencies (IF_IN1 and IF_IN2) and low-frequency pilot signal cycles (SC_IN). (No cycle measurement function is available on the TC9256APG and TC9256AFG.)
• High-precision (±0.55 to ±7.15 s) PLL phase error detection
• Numerous general-purpose I/O pins for such uses as peripheral circuit control
• Four N-channel open-drain output ports (OFF withstanding voltage: 12 V) for such uses as control signal output. (TC9256APG and TC9256AFG have only three ports.)
• Standby mode function (turns off FM, AM and IF amps) to save current consumption
• All functions controlled through three serial bus lines
• CMOS structure with operating power supply range of V_DD = 5.0 ± 0.5 V.
• 16-pin DIP (TC9256APG), 20-pin DIP (TC9257APG), 16-pin SOP (TC9256AFG), 20-pin SOP (TC9257AFG) packages

The TC9256APG, TC9256AFG, TC9257APG and TC9257AFG are phase-locked loop (PLL) LSIs for digital tuning systems (DTS) with built-in two-modulus prescalers.

All functions of TC9256APG, TC9256AFG, TC9257APG and TC9257AFG  are controlled through three serial bus lines. These LSIs are used to configure high-performance digital tuning systems.