mc145201dt Freescale Semiconductor, Inc, mc145201dt Datasheet - Page 19

• Manufacturer Part Number: mc145201dt
• Description: 2.0 Ghz Pll Frequency Synthesizers
• Manufacturer: Freescale Semiconductor, Inc

MOTOROLA
NOTE: See related Figures 24 through 26; these bit streams apply to the MC145190, MC145191, MC145200,
NOTES:
CMOS
MCU
THRESHOLD
DETECTOR
1. When used, the R and V outputs are fed to an external combiner/loop filter. See the Phase–
2. Transistor Q1 is required only if the standby feature is needed. Q1 permits the bipolar section of
3. For optimum performance, bypass the V CC , V DD , and V PD pins to GND with low–inductance ca-
4. The R counter is programmed for a divide value = REF in /f R . Typically, f R is the tuning resolution
and MC145201.
Locked Loop — Low–Pass Filter Design page for additional information.
the device to be shut down via use of the general–purpose digital pin, OUTPUT B. If the standby
feature is not needed, tie Pin 12 directly to the power supply.
pacitors.
required for the VCO. Also, the VCO frequency divided by f R = N T = N
the values (N, A) that must be programmed into the N and A counters, respectively.
INTEGRATOR
LOW–PASS
FILTER
ERROR SIGNALS
OPTIONAL LOOP
D in
(NOTE 1)
+ V
1000 pF
Figure 23. Cascading Two Devices
CLK
Figure 22. Example Application
DEVICE #1
NC
10
VCO
UHF
1
2
3
4
5
6
7
8
9
ENB
REF out
LD
V PD
PD out
GND
Rx
TEST 1
f in
R
V
(DATA OUT)
OUTPUT A
OUTPUT A
OUTPUT B
TEST 2
REF in
V DD
V CC
ENB
CLK
D in
f in
OPTIONAL
16
15
14
20
19
18
17
13
12
11
NC
D in
GENERAL–PURPOSE
+ 5 V
BUFFER
DIGITAL OUTPUT
64 + A; this determines
CLK
Q1
DEVICE #2
NOTE 2
UHF OUTPUT
ENB
MC145200 MC145201
MCU
(DATA OUT)
+ 5 V
OUTPUT A
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