Schematic

1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
D D
C C
B B
A A
Voice Recorder-ISD1820
XXXXX-CD
V1.0
2016/6/8
14:01:52
Title:
Size:
Date:
Revision:
Time:
A3Drawn:
Page:
X of Y
SKU:
SEN0197
REC
1
PLAYE
2
PLAYL
3
MIC
4
MICREF
5
AGC
6
SP-
7
VSSA
8
SP+
9
ROSC
10
VCC
11
FT
12
RECLED
13
VSS
14
U1
1
2
U2
100nf
C2
100nf
C3
4.7K
R6
VCC
1K
R1
VCC
GND
PLAYE
1
2
3
J1
VCC
GND
1
4 3
2
B1
1
4 3
2
B2
REC
VCC
100K
R5
GND
GND
GND
LED1
1K
R3
VCC
RECLED
220uF/6.3V
C1
4.7K
R2
2.2uF
C54.7uF
C4
10uF
C10
100nf
C13
GND
VCC
SUTDOWN
1
BYPASS
2
+IN
3
-IN
4
VO1
5
VDD
6
GND
7
VO2
8
U3
8002B
GND
0.1uF
C9
VCC
100nF
C11
10uF
C12
200KR4
20K
R8
VO1
VO2
SPK1
100nf
C8
10K
R10
GND
47K
R9
GND
1K
R7
100pF
C7
GND
H1
H2
1000pf
C14
GND
GND
2
5
1
4
3
J2
2.2uF
C16
NC
R12
20K
R11
47K
R14
GND
1K
R13
100pF
C17
GND
10uF
C18
47uF
C19