MB15C703 Datasheet, PDF (4/16 Pages) Fujitsu Component Limited. – Built-in IF Band Voltage Controlled Oscillator Mask ROM Frequency Synthesizer

MB15C703
s BLOCK DIAGRAM
PLLVDD ¹⁰
OSCin 8
PLLPS 16
PLLfin 15
PLLGND ₁₄
Buffer Amp.
Power saving
control circuit
Reference counter (R)
Phase
comparator
PLL-Block
Buffer Amp.
Swallow counter (A) Main counter (N)
Prescaler (P)
Control
circuit
Lock
detector
Output
selector
Charge pump
VCO-Block
6 LD
9 fout
13 ^PLLDo
3 VCOCNT
19 VCOTNKI
20 ^VCOTNKO
18 VCOout
5
14
VCOVDD VCOPS
VCOGND
s FUNCTIONAL DESCRIPTIONS
fvco = [(P × N + A)] × fosc / R
Symbol
fvco
fosc
N
A
P
R
Description
Output frequency of voltage controlled oscillator
Reference oscillation frequency
Divide ratio of the main counter
Divide ratio of the swallow counter
Preset divide ratio of dual modulus the prescaler
Divide ratio of the reference counter
Setting value
129.55 MHz
12.80 MHz
161
15
16/17
256 (fr = 50 kHz)
4