lc72133m Sanyo Semiconductor Corporation, lc72133m Datasheet - Page 15

• Manufacturer Part Number: lc72133m
• Description: Pll Frequency Synthesizer For Electronic Tuning
• Manufacturer: Sanyo Semiconductor Corporation

Programmable Divider Structure
Note: * Don’t care.
1. Programmable Divider Calculation Examples
A
B
C
• FM, 50 kHz steps (DVS = 1, SNS = *, FMIN selected)
• SW, 5 kHz steps (DVS = 0, SNS = 1, AMIN high speed side selected)
• MW, 10 kHz steps (DVS = 0, SNS = 0, AMIN low-speed side selected)
FM RF = 80.0 MHz (IF = –10.7 MHz)
FM VCO = 69.3 MHz
PLL fref = 25 kHz (R0 to R1 = 1, R2 to R3 = 0)
69.3 MHz (FM VCO) 25 kHz (fref) 2 (FMIN: divide-by-two prescaler) = 1386
SW RF = 21.75 MHz (IF = +450 kHz)
SW VCO = 22.20 MHz
PLL fref = 5 kHz (R0 = R2 = 0, R1 = R3 = 1)
22.2 MHz (SW VCO) 5 kHz (fref) = 4440
MW RF = 1000 kHz (IF = +450 kHz)
MW VCO = 1450 kHz
PLL fref = 10 kHz (R0 to R2 = 0, R3 = 1)
1450 kHz (MW VCO) 10 kHz (fref) = 145
AMIN
FMIN
DVS
1
0
0
SNS
1
0
*
* * * *
0
0
1
0
A
8
0
0
Input pin
FMIN
AMIN
AMIN
1
1
DVS
0
1
1
1
0
0
1/2
6
5
1
SNS
1
1
0
(A)
0
0
0
1
1
1
(B)
LC72133M, 72133V
0
0
0
272 to 65535
272 to 65535
5
1
9
Set divisor
1
0
0
1158 (HEX)
Swallow
Counter
4 to 4095
091 (HEX)
4bits
0
0
1
0
0
1
0
0
0
0
1
0
0
0
0
(C)
0
0
0
*
0
1
1
0
0
Twice the set value
The set value
The set value
Actual divisor: N
Programmable
fref
1
0
0
fvco/N
Divider
12bits
1
1
0
0
0
0
0
1
1
056A (HEX)
PD
fvco = fref
Input frequency range (MHz)
øE
A11929
A11930
A11931
N
10 to 130
0.5 to 10
2 to 40
No. 5427-15/23
A11928