mc145156 Lansdale Semiconductor, Inc., mc145156 Datasheet - Page 4

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

LANSDALE Semiconductor, Inc.
φR,φV
Phase Detector B Outputs (Pins 8, 9)
a loop–error signal. A single–ended output is also available for
this purpose (see PD out ).
leading, then error information is provided by φV pulsing low.
φR remains essentially high.
lagging, then error information is provided by φR pulsing low.
φV remains essentially high.
φV and φR remain high except for a small minimum time peri-
od when both pulse low in phase.
f V
N Counter Output (Pin 10)
Page 4 of 35
These phase detector outputs can be combined externally for
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
This is the buffered output of the ÷ N counter that is inter-
NOTES:
1. f R = 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).
RECEIVE
(ON–CHIP OSC.
10.0417 MHz
OPTIONAL)
REF. OSC.
N13
TRANSMIT
(ADDS 856 TO
÷ N VALUE)
+ V
OSC in
N12
2.048 MHz
Figure 1. 5 MHz to 5.5 MHz Local Oscillator Channel Spacing = 1 kHz
N11
“0”
OSC in
V DD
V SS
T/R
OSC out
Figure 2. Synthesizer for Land Mobile Radio UHF Bands
N10
OSC out
“0”
“1”
N9
“1”
RA2
N8
ML145151
N7
CHANNEL PROGRAMMING
RA1
“1”
f in
ML145151
N6
÷ N = 2284 TO 3484
TYPICAL APPLICATIONS
N5
RA0
www.lansdale.com
“0”
N4
RA2
NC
N3
RA1
LD
N2
nally connected to the phase detector input. With this output
available, the ÷ N counter can be used independently.
LD
Lock Detector Output (Pin 28)
phase and frequency). Pulses low when loop is out of lock.
POWER SUPPLY
V DD
Positive Power Supply (Pin 3)
from + 3 to + 9 V with respect to V SS .
V SS
Negative Power Supply (Pin 2)
ground.
PD out
N1
ML145151 Data Sheet Continued on Page 23
NC
RA0
PD out
Essentially a high level when loop is locked (f R , f V of same
The positive power supply potential. This pin may range
The most negative supply potential. This pin is usually-
φ R
f in
f V
f V
LOCK DETECT SIGNAL
N0
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
CHOICE OF
DETECTOR
SIGNALS
ERROR
T: 13.0833 – 18.0833 MHz
R: 9.5167 – 14.5167 MHz
X6
FILTER
LOOP
CONTROLLED
OSCILLATOR
5 – 5.5 MHz
60.2500 MHz
VOLTAGE
DOWN
MIXER
VCO
TRANSMIT: 440.0 – 470.0 MHz
RECEIVE: 418.6 – 448.6 MHz
T: 73.3333 – 78.3333 MHz
R: 69.7667 – 74.7667 MHz
(25 kHz STEPS)
X6
ML145151
Issue A