ISD2340 Winbond, ISD2340 Datasheet - Page 30

• Manufacturer Part Number: ISD2340
• Description: SINGLE-CHIP/ MULTIPLE-MESSAGES/ VOICE RECORD/PLAYBACK DEVICE 32-/ 40-/ 48-/ AND 64-SECOND DURATION
• Manufacturer: Winbond

11. TYPICAL APPLICATION CIRCUIT
Note: If desired, pin 18 (PDIP package) may be left unconnected (microphone preamplifier noise will be higher). In
this case, pin 18 must not be tied to any other signal or voltage. Additional design example schematics are
provided below.
V
CC
CHIP ENABLE
POWER DOWN
PLAYBACK/RECORD
100 K
R4
Ω
V
SS
FIGURE 5: DESIGN SCHEMATIC
23
24
26
10
27
25
22
1
2
3
4
5
6
7
9
P/R
OVF
OEM
A0
A1
A2
A3
A4
A5
A6
A7
A8
CE
PD
XCLK
ISD2532/40/48/64
470 K
ANA OUT
- 30 -
R2
MIC REF
Ω
ANA IN
AUX IN
AGC
V
V
V
V
SP+
MIC
SP-
CCD
CCA
SSD
SSA
28
16
12
13
15
11
14
20
21
18
17
19
0.1
C2
4.7
µ
C6
R6
µ
(Note)
F
5.1 K
F
1 K
Ω
R1
Ω
V
CC
220
C7
0.1
C3
0.1
C4
V
CC
ISD2532/40/48/64
µ
µ
µ
10 K
R3
F
F
F
0.1
Ω
MICROPHONE
µ
C1
ELECTRET
F
SPEAKER
C8
22
16
µ
Ω
F
R5
10 K
C5
0.1
Ω
µ
F