mc145156 Lansdale Semiconductor, Inc., mc145156 Datasheet - Page 19

• Manufacturer Part Number: mc145156
• Description: Pll Frequency Synthesizer Family
• Manufacturer: Lansdale Semiconductor, Inc.

LANSDALE Semiconductor, Inc.
leading, then error information is provided by φ V pulsing low.
φ R remains essentially high.
lagging, then error information is provided by φ R pulsing low.
φ V remains essentially high.
φ V and φ R remain high except for a small minimum time peri-
od when both pulse low in phase.
f R , f V
RCounter Output, N Counter Output (Pins 13, 3)
f R and f V outputs are connected internally to the ÷ R and ÷ N
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.
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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 fV 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
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ML145157
REF out
Buffered Reference Oscillator Output (Pin 14)
ence oscillator to another frequency synthesizer, or as the sys-
tem clock to a microprocessor controller.
S/R out
Shift Register Output (Pin 12)
provide band switching, control information, and counter pro-
gramming 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 to
The positive power supply potential. This pin may range
The most negative supply potential. This pin is usually
ML145157
Issue A