
MOTOROLA CMOS LOGIC DATA
6–469
MC14568B
Figure 8. Frequency Synthesizer Using MC14568B, MC14569B and MC14522B
(Without Mixer)
Divide ratio = 160N1 + 16N2 + N3
Example:
fout = N1 (MHz) + N2 (x 100 kHz) + N3 (x25 kHz)
Frequency range = 5 MHz
Channel spacing = 25 kHz
Reference frequency = 6.25 kHz
Figures shown in parenthesis refer to example.
Recommended reading:
(1) AN535: “Phase–Lock Techniques”
(2) AR254: “Phase–Locked Loop Design Articles”
(5 MHz)
(VDD)
VDD
VDD
PCin
C1
CTL
“0”
MC14568B
PCout
G
F
PE
VSS
VDD
DP0 – – – – – DP3
VCO
fout
DP0 – – – – – DP3
C
PE
MC14522B
“0”
Q
ZERO DETECT
(BCD)
BINARY
CF
C
N1
(0 – 5)
(625 kHz STEPS)
N2
(0 – 9)
(62.5 kHz STEPS)
N3
(0, 4, 8, 12)
(6.25 kHz STEPS)
MC14569B
Summary of Contents for CMOS Logic
Page 1: ......
Page 5: ...iv MOTOROLA CMOS LOGIC DATA ...
Page 6: ...Master Index 1 ...
Page 12: ...Product Selection Guide 2 ...
Page 17: ...The Better Program 3 ...
Page 20: ...B and UB Series Family Data 4 ...
Page 25: ...CMOS Handling and Design Guidelines 5 ...
Page 32: ...CMOS Handling and Design Guidelines 5 ...
Page 39: ...Data Sheets 6 ...
Page 234: ...MOTOROLA CMOS LOGIC DATA MC14174B 6 196 FUNCTIONAL BLOCK DIAGRAM TIMING DIAGRAM ...
Page 238: ...MOTOROLA CMOS LOGIC DATA MC14175B 6 200 FUNCTIONAL BLOCK DIAGRAM TIMING DIAGRAM ...
Page 555: ...CMOS Reliability 7 ...
Page 561: ...Equivalent Gate Count 8 ...
Page 563: ...Packaging Information Including Surface Mounts 9 ...
Page 571: ......