TC9256APG

TC9256, 57APG/AFG TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic TC9256APG, TC9256AFG, TC9257APG, TC9257AFG PLL for DTS 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 are controlled through three serial bus lines. These LSIs are used to configure high-performance digital tuning systems. Features 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 FMIN input (with two-modulus prescaler) and at 0.5 to 40 MHz during AMIN 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 (IFIN1 and IFIN2) and low-frequency pilot signal cycles (SCIN). (No cycle measurement function is available on the TC9256APG and TC9256AFG.) High-precision (±0.55 to ±7.15 µs) PLL phase error detection Numerous general-purpose I/O pins for such uses as peripheral circuit control Four N-channel open-drain outp...