SEMICONDUCTOR DATA
1) AK2341 (XA0239)
CTCSS Encoder/Decoder
Pin
No.
Pin
Name
I/O
Function
1
RXIN I
RX Signal Input
2
RXINO 0 AMP2 Output
3 TXINO
o
AMP1 Output
4
TXIN I
TX Audio Input
5
RXOUT 0
RX Audio Output
6
TXOUT
0
TX Audio Output
7
VDD
-
Power Supply (1.8 ~ 5.5V)
8
XIN
I
Crystal Terminal (3.6864MHz)
9
XOUT
o Crystal Terminal (3.6864MHz)
10
STB
I
Strobe for Serial Data
11 SDATA
I
Serial Data
12 SCLK
I
Serial Clock
13
DCS
I
DCS Input
14
DETOUT
0 Tone Detection Output (Detect: Low)
15 VSS
-
Ground
16
DREF I Tone Detection Level Adjust Input
17
TLINP
I
RX Tone Signal Reference Input
18
TLINN I
RX Tone Signal Input
19 TLINO
o
AMP3 Output
20 RXTONE
o
RX Tone Signal Output
21 TXTONE
o
TX Tone Signal Output
22
AGNDIN
I Analog Ground Input
23
AGND
0
Analog Ground Output
24 BIAS
I
Bias Input
RXIN
d =
1
24
Z U
BIAS
RXINO
n z
2
23
= ]
AGND
TXINO
n z
3
22
Z Z 2
AGNDIN
TXIN
n z
4
21
= □
TXTONE
RXOUT
n z
5
20
zzn
RXTONE
TXOUT
n z
6
>
7s
PO
19
Z D
TLINO
VDD
n z
7
CO
18
Z □
TLINN
XIN
n z
8
17
Z Z 3
TLINP
XOUT n z
9
16
=□
DREF
STB
n z
10
15
=□
VSS
SDATA
[Z Z
11
14
= l
DETOUT
SCLK
n z
12
13 =Z1
DCS
Block Diagram
10
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