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MC145157-2 View Datasheet(PDF) - Motorola => Freescale

Part Name
Description
View to exact match
MC145157-2
Motorola
Motorola => Freescale Motorola
MC145157-2 Datasheet PDF : 26 Pages
1 2 3 4 5 6 7 8 9 10 Next Last
φR, φV
Phase Detector B Outputs (Pins 8, 9)
These phase detector outputs can be combined externally
for a loop–error signal. A single–ended output is also avail-
able for this purpose (see PDout).
If frequency fV is greater than fR or if the phase of fV is
leading, then error information is provided by φV pulsing low.
φR remains essentially high.
If the frequency fV is less than fR or if the phase of fV is
lagging, then error information is provided by φR pulsing low.
φV remains essentially high.
If the frequency of fV = fR and both are in phase, then both
φV and φR remain high except for a small minimum time
period when both pulse low in phase.
fV
N Counter Output (Pin 10)
This is the buffered output of the ÷ N counter that is inter-
nally connected to the phase detector input. With this output
available, the ÷ N counter can be used independently.
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.
2.048 MHz
TYPICAL APPLICATIONS
NC
NC
OSCin
OSCout
fin
RA2 RA1
MC145151–2
RA0
PDout
N13 N12 N11 N10 N9 N8 N7 N6 N5 N4 N3 N2 N1 N0
VOLTAGE
CONTROLLED
OSCILLATOR
5 – 5.5 MHz
0 1 1 1 0 0 0 1 0 0 0 = 5 MHz
1 0 1 0 1 1 1 1 1 0 0 = 5.5 MHz
Figure 1. 5 MHz to 5.5 MHz Local Oscillator Channel Spacing = 1 kHz
LOCK DETECT SIGNAL
TRANSMIT: 440.0 – 470.0 MHz
“1”
“1”
“0”
CHOICE OF
DETECTOR
RECEIVE: 418.6 – 448.6 MHz
(25 kHz STEPS)
+V
REF. OSC.
10.0417 MHz
(ON–CHIP OSC.
OPTIONAL)
OSCout RA2
OSCin
VDD
VSS
T/R
RA1 RA0
MC145151–2
LD
fV
PDout
φR
fV
fin
“0” “0” “1”
ERROR
SIGNALS
LOOP
FILTER
VCO
X6
T: 13.0833 – 18.0833 MHz
R: 9.5167 – 14.5167 MHz
T: 73.3333 – 78.3333 MHz
R: 69.7667 – 74.7667 MHz
DOWN
RECEIVE
TRANSMIT
CHANNEL PROGRAMMING
÷ N = 2284 TO 3484
MIXER
(ADDS 856 TO
÷ N VALUE)
X6
60.2500 MHz
NOTES:
1. fR = 4.1667 kHz; ÷ R = 2410; 21.4 MHz low side injection during receive.
2. Frequency values shown are for the 440 – 470 MHz band. Similar implementation applies to the 406 – 440 MHz band.
For 470 – 512 MHz, consider reference oscillator frequency X9 for mixer injection signal (90.3750 MHz).
Figure 2. Synthesizer for Land Mobile Radio UHF Bands
MC145151–2 Data Sheet Continued on Page 15
MC145151–2 through MC145158–2
4
MOTOROLA
 

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