MC145190F 데이터 시트보기 (PDF) - Motorola => Freescale
부품명
상세내역
제조사
MC145190F Datasheet PDF : 24 Pages
| |||
THRESHOLD
DETECTOR
1 REFout
INTEGRATOR
2 LD
OPTIONAL LOOP
ERROR SIGNALS
(NOTE 1)
3 φR
4 φV
+V
LOW–PASS
FILTER
5 VPD
6 PDout
7
GND
8
Rx
9
NC TEST 1
10 fin
1000 pF
REFin 20
Din 19
CLK 18
ENB 17
OUTPUT A 16
15
OUTPUT B
VDD 14
TEST 2 13 NC
VCC 12
fin 11
GENERAL–PURPOSE
DIGITAL OUTPUT
+5 V
Q1
NOTE 2
+5 V
MCU
UHF
VCO
UHF OUTPUT
BUFFER
NOTES:
1. When used, 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.
2. Transistor Q1 is required only if the standby feature is needed. Q1 permits the bipolar section of 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.
3. For optimum performance, bypass the VCC, VDD, and VPD pins to GND with low–inductance capacitors.
4. The R counter is programmed for a divide value = REFin/fR. Typically, fR is the tuning resolution required for
the VCO. Also, the VCO frequency divided by fR = NT = N × 64 + A; this determines the values (N, A) that must
be programmed into the N and A counters, respectively.
Figure 22. Example Application
DEVICE #1
OUTPUT A
Din
CLK ENB (DATA OUT)
DEVICE #2
OUTPUT A
Din
CLK ENB (DATA OUT)
CMOS
MCU
OPTIONAL
NOTE: See related Figures 24 through 26; these bit streams apply to the MC145190, MC145191, MC145200,
and MC145201.
Figure 23. Cascading Two Devices
MC145190•MC145191
20
MOTOROLA
Share Link: 