TC9216P

The TC9216P is a high speed PLL-LSI with built-in 2 modulus prescaler. Each function is controlled through 3 serial bus lines and high performance digital tuning system can be constituted.

Features of the TC9216P are:(1)suitable for DTS of Hi-Fi tuner and car stereo; (2)built-in prescaler, and TC9216P can operate 30~140MHz (2 modulus type) at FM band and 0.5~40MHz (2 modulus type or direct frequency dividing type) at AM band; (3)built-in 16bit programmable counter, two parallel outputs phase comparator, crystal oscillator and reference counter; (4)crystal resonator can be used 4.5MHz or 7.2MHz; (5)15 kinds of reference frequency can be selected(when crystal is used 4.5MHz) (ref=0.5 k, 1 k, 2. 5 k, 3 k,3.125k, 3.90625k, 5k, 6.25k, 7.8125k, 9k, 10k, 12.5k, 25k,50k, 100kHz); (6)frequency measurement (HFCin, LFCin) of intermediate frequency etc. and periodic measurement (SCIN) of low frequency pilot signal etc. are possible by built-in 16bit; (7)universal type frequency counter; (8)built-in abundant general purpose input/output terminal and usable for control radio circuit part; (9)all of function controls are performed through 3 serial bus lines; (10)operating voltage range:VDD=5.010.5V, and it is CMOS structure.

The absolute maximum ratings of the TC9216P can be summarized as:(1)supply voltage:-0.3 to 6 V;(2)input voltage:-0.3 to Vdd+0.3V;(3)storage temperature:-65 to 150;(4)operating temperature:-40 to 85;(5)power dissipation:300mW.Phase comparator compares reference frequency signal supplied from reference frequency divider and programmable counter frequency dividing output. It outputs the observational error and controls VCO through low-pass filter to make frequency and phase difference between these two signals accord.Filter constant can be designed suitably for every band of FM/AM because Tri-state buffer D01 and D02 terminals are output from phase comparator in parallel.DO output timing chart and an example of active low-pass filter circuit through the darlington connection of FET and transistor are shown in the above diagram.Besides, the filter circuit shown in the above diagram  is one of example for reference and so,an actual circuit shall be examined and designed according to the receiving band constitution of the system and required characteristics.