M54958FP

The M54958FP is a 400MHz band 2 system 1 chip PLL frequency synthesizer.Since PLL with 2 systems is incorporated,it is optimum for cordlessphone,dual band transceiver,etc.Two modulus prescalers of 1/128 and 1/129 are incorporated,and direct input of maximum 400MHz is available.

The M54958FP has 8 features.The first one is PLL with 2 systems is incorporated.The second one is 1/128 and 1/129 prescalers are incorporated (fmax=400MHz).The third one is wide range of operating voltage (VCC=3.0V to 5.5V).The fourth one is low current consumption,when the two systems of PLL are operating;when one of them is not operating;when both of them are not operating.The fifth one is divider for reference frequency is also programmable.Setting range of dividing ratio N (fREF)=128 to 16,376 (can be set by multiples of 8).The sixth one is programmable dividing for local oscillator.Setting range of dividing ratio N (V.C.O)=16,384 to 131,071 (can be set by integral multiples.)The seventh one is serial data input system (3 data transmission lines).The eighth one is PLL lock/unlock status indication function.

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