1812A/1812B/1813
APPLICATION CIRCUITS
Speaker output with an envelope
CMOS IC
Speaker output without an envelope
VDD
8050
100Ω
Rosc
1 VSS OSC1 8
2 OUT OSC2 7
3 OUT
6
KEY
4 LED VDD 5
VDD
UTC 1812A
100Ω
Piezo output without an envelope
Piezo
1 VSS OSC1 8 Rosc
2 OUT OSC2 7
3 OUT
6
KEY
4 LED VDD 5
VDD
UTC 1812A
100Ω
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
5 of 7
QW-R502-006.F