Integrated Circuits Inc.
TYPICAL APPLICATIONS
Rp=1ohm
R1
1M
C2, 0.1uF
R
OSC
=220K
aIVR341N
VDD
OSC
PB0
PB1
PB2
VDDA
VOUT1
C1, 0.1uF
SP
3.3V
VOUT2_
COUT
PB3
Rrst = 4.7K
RSTB
Crst = 0.1uF
VSS, VSSA
Note:
1. PB0 to PB2 are set to input; PB3 is set to output
2. C1 and C2 must be connected directly on the VDD, VDDA and VSS, VSSA pins of the chip
3. R1 is optional for fast discharge of C1, C2 and Crst when power off.
Using 3.3V Battery Direct Drive Speaker
Rp=1ohm
HT7335
C2, 0.1uF
R
OSC
=220K
8 1/4W
Speaker
VDD
OSC
PB0
PB1
PB2
VDDA
C1, 0.1uF
4.5V
VOUT2_
COUT
Rb
Tr
4.7K
RSTB
VSS, VSSA
0.1uF
Note :
PB0 to PB2 are set to input
C1 and C2 must be connected directly on the VDD/VDDA and
VSS/VSSA pins
Output driving of HT LDO:
HT7133 (30mA, 3.3V)
HT7536 (100mA, 3.6V)
HT7335 (250mA, 3.5V)
Using 4.5V Battery with COUT speaker drive
7
SEP 15, 2011
APLUS [ APLUS INTERGRATED CIRCUITS ]
