ISD1740PYI Nuvoton Technology Corporation of America, ISD1740PYI Datasheet - Page 16

• Manufacturer Part Number: ISD1740PYI
• Description: IC VOICE REC/PLAY 40-SEC 28-DIP
• Manufacturer: Nuvoton Technology Corporation of America
• Series: ISD1700, ChipCorder®r

Specifications of ISD1740PYI

• Interface: SPI
• Duration: 40 Sec
• Mounting Type: Through Hole
• Package / Case: 28-DIP (0.600", 15.24mm)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: ISD-COB1790 - BOARD DEMO FOR ISD1790ISD-COB1760 - BOARD DEMO FOR ISD1760ISD-COB1750 - BOARD DEMO FOR ISD1750ISD-COB1740 - BOARD DEMO FOR ISD1740ISD-COB1730 - BOARD DEMO FOR ISD1730ISD-COB17240 - BOARD DEMO FOR ISD17240ISD-COB17210 - BOARD DEMO FOR ISD17210ISD-COB17150 - BOARD DEMO FOR ISD17150ISD-ES17XX_USB_PB - BOARD DEMO FOR ISD1700 SERIES
• Filter Pass Band: -
• Lead Free Status / RoHS Status: Supplier Unconfirmed, Lead free / RoHS Compliant

10 TYPICAL APPLICATION CIRCUITS
The following typical applications examples on ISD1700 Series are for references only. They make no
representation or warranty that such applications shall be suitable for the use specified. Each design
has to be optimized in its own system for the best performance on voice quality, current consumption,
functionalities and etc.
The below notes apply to the following applications examples:
Example #1: Recording using microphone input via push-button controls
*
**
*** At 8kHz sampling freq, Rosc = 80 K
These capacitors may be needed in order to optimize for the best voice quality, which is also dependent
upon the layout of the PCB. Depending on system requirements, they can be 10 μF, 4.7 μF or other values.
Please refer to the applications notes or consult Winbond for layout advice.
It is important to have a separate path for each ground and power back to the related terminals to minimize
the noise. Also, the power supplies should be decoupled as close to the device as possible
V
CC
4.7 K Ω
4.7 K
4.7 KΩ
Ω
0.1 F
Rosc ***
0.1 F
4.7 F
μ
μ
μ
4.7 F
μ
24
23
25
26
19
22
10
11
7
6
5
4
20
18
9
REC
PLAY
ERASE
R
AGC
SS
SCLK
MOSI
MISO
AnaIn
FWD
MIC+
MIC -
VOL
FT
OSC
: Digital ground;
ISD1700
- 16 -
AUD/AUX
INT/RDY
RESET
: Analog ground;
V
V
V
SP-
V
V
SP+
V
LED
V
SSP1
SSP2
CCA
SSA
CCP
CCD
SSD
28
21
14
16
12
15
13
17
27
3
2
1
8
1 KΩ
0.1 F
V
0.1 F
CCD
Optional
μ
100 K
V
μ
CCP
: Ground for SP+;
or Buzzer
Speaker
D1
V
Ω
CCD
ISD1700 SERIES
*
0.1 F
0.1 F
vAlert
*
μ
μ
Optional: based upon the applications
AUD
AUX
V
CCA
*
V
V
: Ground for SP-
*
V
**
CCA
CCD
CCP
390 Ω
0.1 F
Vcc
μ
.
Reset
Speaker
0.1 F
V
**
μ
CC
8050C
Gnd