MC145151 Motorola, MC145151 Datasheet - Page 19

• Manufacturer Part Number: MC145151
• Description: Parallel-Input PLL Frequency Synthesizer
• Manufacturer: Motorola

leading, then error information is provided by V pulsing low.
lagging, then error information is provided by R pulsing low.
period when both pulse low in phase.
f R , f V
R Counter Output, N Counter Output (Pins 13, 3)
f R and f V outputs are connected internally to the R and
counter outputs respectively, allowing the counters to be
used independently, as well as monitoring the phase detector
inputs.
LD
Lock Detector Output (Pin 7)
locked (f R , f V of same phase and frequency), and pulses low
when loop is out of lock.
MOTOROLA
R remains essentially high.
V remains essentially high.
V and R remain high except for a small minimum time
If frequency f V is greater than f R or if the phase of f V is
If the frequency f V is less than f R or if the phase of f V is
If the frequency of f V = f R and both are in phase, then both
Buffered, divided reference and f in frequency outputs. The
This output is essentially at a high level when the loop is
N
MC145157–2 Data Sheet Continued on Page 23
REF out
Buffered Reference Oscillator Output (Pin 14)
ence oscillator to another frequency synthesizer, or as the
system clock to a microprocessor controller.
S/R out
Shift Register Output (Pin 12)
to provide band switching, control information, and counter
programming code checking.
POWER SUPPLY
V DD
Positive Power Supply (Pin 4)
from + 3 to + 9 V with respect to V SS .
V SS
Negative Power Supply (Pin 6)
ground.
This output can be used as a second local oscillator, refer-
This output can be connected to an external shift register
The positive power supply potential. This pin may range
The most negative supply potential. This pin is usually
MC145151–2 through MC145158–2
19