Schematics

41174 walkie talkie
Y342
1 of 1LUNG CHEONG
SHEET:APPROVED BY:DRAWING BY:DESIGN BY:
DWG NO:
FUNCTION:
TITLE:
longdanyu
2021-06-01 V1.0
美国版，频率：462.5625M
1
XI
2
VCCRF
3
ANT
4
VCCPA
5
VSS
6
MIC
7
AUDC
8
VCCAUD
9
EAROP
10
EARON
11
SCK
12
SDA
13
RSSI
14
CDVDD
15
SQ
16
XO
U1
H130
Y1
21.25M
C32
100nF
C10
100nF
C17100nF
C11
100nF
C1
15pF
C2
100nF
C28
15pF
C33
12pF
C304.7nF
L13
27nH
L2
15nH
ANTA
MIC1
C4
1nF
R5
100K
R102.2K
SPK
R2 0R
C64
15pF
C5
15pF
C18
1uF
R3210K
R36
15K
R3 100K
R58
2K
R59
47K
Q1
8550
R7
10
C6
104
D2
K3
PTT
1
GND
2
IN
3
OUT
U7
3V-LDO
C7
4.7uf
C3
10nF
C52
100nF
C12
4.7uF
BAT
9V
R4
100R
D1 NC
SW2
SW1
ON-OFF
PTC
1
VCC
2
PA2
3
PA1
4
PA3
5
PA0
6
PA5
7
PA4
8
VSS
H132
VDD
VDD
3V
BATT
VDD
3V
3V
CLK
TP6