ISD1790PY Nuvoton Technology Corporation of America, ISD1790PY Datasheet - Page 16

• Manufacturer Part Number: ISD1790PY
• Description: IC VOICE REC/PLAY 90-SEC 28-DIP
• Manufacturer: Nuvoton Technology Corporation of America
• Series: ISD1700, ChipCorder®r

Specifications of ISD1790PY

• Interface: SPI
• Duration: 90 Sec
• Mounting Type: Through Hole
• Package / Case: 28-DIP (0.600", 15.24mm)
• 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
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Filter Pass Band: -

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
It is important to have a separate path for each ground and power back to the related terminals to minimize
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 Nuvoton for layout advice.
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
22
24
23
25
26
19
10
11
7
6
5
4
20
18
9
REC
PLAY
ERASE
AnaIn
R
AGC
FWD
SS
SCLK
MOSI
MISO
MIC -
MIC+
VOL
FT
OSC
: Digital ground;
ISD1700
- 16 -
AUD/AUX
INT/RDY
RESET
: Analog ground;
V
V
SP-
V
SP+
V
V
V
LED
V
SSP1
SSP2
CCA
SSA
CCP
CCD
SSD
28
21
14
16
12
15
13
17
27
3
2
1
8
ISD1700 DATASHEET
1 KΩ
0.1 F
V
0.1 F
CCD
Optional
µ
Publication Release Date:Feb 4, 2010
100 K
µ
V
CCP
: Ground for SP+;
or Buzzer
Speaker
D1
V
Ω
CCD
*
0.1 F
0.1 F
vAlert
µ
*
µ
Optional: based upon the applications
AUD
AUX
V
CCA
*
: Ground for SP-
V
V
*
**
V
CCA
CCD
CCP
390 Ω
0.1 F
Vcc
µ
.
Reset
Speaker
0.1 F
Revision 2.0
V
**
µ
CC
8050C
Gnd