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MTP777 Fiches technique(PDF) 7 Page - Aplus Intergrated Circuits

No de pièce MTP777
Description  aMTP777
PDF  8 Pages
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Fabricant  APLUS [Aplus Intergrated Circuits]
Site Internet  http://www.aplusinc.com.tw
Logo APLUS - Aplus Intergrated Circuits

MTP777 Fiches technique(HTML) 7 Page - Aplus Intergrated Circuits

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Integrated Circuits Inc.
aMTP777
MAY 10, 2011
7
5V CPU Control with COUT
Note for COUT speaker drive:
1. C1 and C2 must be connected as close to the VDD/VDDA and VSS/VSSA pins as possible.
2. Rb is base resistor from 120 Ohm to 390 Ohm depends on value of VDD and transistor gain.
3. Tr is an NPN transistor with beta larger than 150, e.g. 8050D.
4. Rosc = 220K Ohm with Vdd=3.0V can support sampling rate up to 14KHz.
VSS, VSSA
RSTB
PB3
OSC
0.1uF
ROSC
220K
Tr
VOUT2_
COUT
8
1/4W
Speaker
HT7335
PB0
PB1
PB2
VOUT=+3.5V
Addr[0]
Addr[1]
Addr[2]
IO0
VIN=+5V
Note :
PB0 to PB2 set to internal pull-up
Addr[0] to [2] are open drain output drive
Rb
4.7K
VDDA
C1, 0.1uF
Rp=1ohm
VDD
C2, 0.1uF
DAT
SCK
DO
EN



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