KD-SX998R,KD-SX997R
(No.49819)1-43
4.20 TB2118F-X (IC31) : PLL
• Terminal Layout
• Block diagram
• Pin Function
1
2
3
4
5
6
7
8
9
1
0
11
1
2
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
Pin
No.
Symbol I/O
Function
Pin
No.
Symbol I/O
Function
1
XOUT
O Crystal oscillator pin
13
IFC
I
IF signal input
2
OSC
-
Non connect
14
VDD
-
Power pins for digital block
3
CE
I
Chip enable input
15
FMIN
I
FM band local signal input
4
DI
I
Serial data 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