KD-SX947R
(No.49818)1-43
4.19 TB2118F-X (IC31) : PLL
• Pin Layout
• Block diagram
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
1
24
2
15
16
13
3
4
5
6
7
8
9
10 11 12
14
17
21
23
18
19
22
20
Buff.
ON/OFF
OSC circuit
AMP
AMP
AMP
Reference Counter
Phase
Comparator
Prescaler
4-bit
Swallow counter
12-bit
Programmable counter
Constant
power supply voltage
AM CP.
switch
switch
RF
Vt
FM cp
+
-
+
-
a-gnd
vcc
d-gnd
vdd
vdd2
out-2
out-1
I/O -2
I/O -1
SL
osc
XO
XI
FM VCO
AMVCO
IFC
CE
DIN
CK
DOUT
20-bit BINARY COUNTER
Serial
Interface
Resistor 1
Resistor 2
22-bit
40bit shift register
I/O PORT
OUTPUT PORT
Vdd
Vcc
Function
Pin
No.
Symbol I/O
Function
13
IFC
I IF signal input
14
VDD
- Power pins for digital block
15
FMIN
I FM band local signal input
16
AMIN
I AM band local signal input
5
CK
I Clock input
17 DGND
- Connect to GND (for digital circuit)
6
DOUT
O Serial data output
18 FMCP O Charge pump output for FM
7
SR
O Register control pin
19
Vt
- Tuning voltage biased to 2.5V.
8
I/01
I/O I/O ports
20 AMCP O Charge pump output for AM
9
I/02
I/O I/O ports
21
VCC
- Power pins for analog block
10
OUT1
- Non connect
22
RF
I Ripple filter connecting pin
11
OUT2
- Non connect
23 AGND
- Connect to GND (for analog circuit)
12
VDD2
- Single power supply for REF. frequency block 24
XIN
I Crystal oscillator pin
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