MC145151-2 데이터 시트보기 (PDF) - Freescale Semiconductor

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MC145151-2

PLL Frequency Synthesizers (CMOS)

Freescale Semiconductor 

MC145152-2 Parallel-Input (Interfaces with Dual-Modulus Prescalers)

divide values respectively for high and low MC levels, N the number programmed into the ÷ N counter,

and A the number programmed into the ÷ A counter.

LD

Lock Detector Output (Pin 28)

Essentially a high level when loop is locked (fR, fV of same phase and frequency). Pulses low when loop

is out of lock.

2.2.3 Power Supply

VDD

Positive Power Supply (Pin 3)

The positive power supply potential. This pin may range from + 3 to + 9 V with respect to VSS.

VSS

Negative Power Supply (Pin 2)

The most negative supply potential. This pin is usually ground.

2.3

Typical Applications

NO CONNECTS

10.24 MHz

NOTE 1

OSCout

OSCin

+V

VDD

VSS

N9

“1" “1" “1"

RA2 RA1 RA0

MC145152-2

N0 A5

LOCK DETECT SIGNAL

R2 C

LD

φR

φV

MC

fin

A0

R1

-

R1

+

R2

NOTE 2

C

150 - 175 MHz

5 kHz STEPS

VCO

NOTES:

CHANNEL PROGRAMMING

÷ 64/65 PRESCALER

1. Off-chip oscillator optional.

2. The φR and φV outputs are fed to an external combiner/loop filter. See the Phase-Locked Loop - Low-Pass Filter Design page

for additional information. The φR and φV outputs swing rail-to-rail. Therefore, the user should be careful not to exceed the com-

mon mode input range of the op amp used in the combiner/loop filter.

Figure 7. Synthesizer for Land Mobile Radio VHF Bands

MC145151-2 and MC145152-2 Technical Data, Rev. 5

10

Freescale Semiconductor

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