Integrated Circuits Inc.

aIVR8511

Oct 06, 2009

7

TYPICAL APPLICATIONS

Using 3.3V Battery Direct Drive Speaker

Using 4.5V Battery with COUT speaker drive

VDD,VDDA

VSS

4.5V

RSTB

PB0

PB1

PB2

OSC

0.1uF

C1, 0.1uF

Tr

VOUT2

_

8Ω 1/4W

Speaker

HT7335

Output driving of HT LDO:

HT7133 (30mA, 3.3V)

HT7536 (100mA, 3.6V)

HT7335 (250mA, 3.5V)

Rb

4.7K

Note :

PB0 to PB2 are set to input

C1 must be connected directly on the VDD and VSS pins

VDD,VDDA

VSS

3.3V

RSTB

PB0

PB1

PB2

OSC

Crst = 0.1uF

C1, 0.1uF

VOUT1

VOUT2

_

PB3

Rrst = 4.7K

Note:

1. PB0 to PB2 are set to input; PB3 is set to output

2. C1 must be connected directly on the VDD and VSS pins of the chip

3. R1 is optional for fast discharge of C1 and Crst when power off.

4. C2 is added according to the table below:

VOUT Volume

SPK

C2

Normal

Not needed

High

Not needed

High

1000pF (102)

High

2000pF (202)

R1

1M

SPK

C2