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ML145157 데이터시트(PDF) 7 Page - LANSDALE Semiconductor Inc.

부품명 ML145157
상세설명  Parallel-Input PLL Frequency Synthesizer Interfaces with Single-Modulus Prescalers
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제조업체  LANSDALE [LANSDALE Semiconductor Inc.]
홈페이지  http://www.lansdale.com
Logo LANSDALE - LANSDALE Semiconductor Inc.

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Issue A
their respective programmed values, and the above sequence
repeated. This provides for a total programmable divide value
(NT)=N•P+A where P and P + 1 represent the dual–modulus
prescaler divide values respectively for high and low MC lev-
els, 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.
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.
LANSDALE Semiconductor, Inc.
ML145152
TYPICAL APPLICATIONS
Figure 1. Synthesizer for Land Mobile Radio VHF Bands
NOTES:
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 common mode input range of the op amp used in the combiner/loop filter.
LOCK DETECT SIGNAL
10.24 MHz
NOTE 1
R1
MC33171
NOTE 2
+
150 – 175 MHz
5 kHz STEPS
ML12017
÷ 64/65 PRESCALER
ML145152
MC
LD
A0
A5
N9
OSCin
VDD
VSS
OSCout
RA2
RA1
φR
φV
fin
VCO
RA0
N0
+ V
R1
R2
C
R2
C
“1”
“1”
“1”
NO CONNECTS
CHANNEL PROGRAMMING


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