MC145156 Datasheet, PDF (12/36 Pages) Motorola, Inc – Parallel-Input PLL Frequency Synthesizer

FM
MC12019
OSC
÷ 20 PRESCALER
AM
OSC
KEYBOARD
2.56 MHz
fin
φ_R
MC145155–2
φ_V
DATA CLK ENB
CMOS
MPU/MCU
–
+
1/2 MC1458*
TO
AM/FM
OSCILLATORS
TO DISPLAY
* The φ_R and φ_V outputs are fed to an external combiner/loop filter. See the Phase–Locked Loop — Low–Pass Filter Design page
for additional information. The φ_R and φ_V outputs swing rail–to–rail. Therefore, the user should be careful not to exceed the common
mode input range of the op amp used in the combiner/loop filter.
Figure 2. AM/FM Radio Synthesizer
MC145151–2 through MC145158–2
12
MC145155–2 Data Sheet Continued on Page 23
MOTOROLA