MSM6234 查看數據表（PDF） - Oki Electric Industry
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MSM6234 Datasheet PDF : 12 Pages
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¡ Semiconductor
MSM6234
Table-2
Row Input
No
1
No
1
More than 2
More than 2
No
1
More than 2
Column Input
No
1
1
No
No
1
More than 2
More than 2
More than 2
Tone Output *
0V
fL + fH
fH
0V
0V
fH
0V
fL
0V
Remarks
Dual tone
Single tone
(Only column)
Single tone
Single tone
fL: Low Group
fH: High Group
* : The tone output shown is in the case when the load resistance is connected between the TONE
OUT pin and the VSS.
Sample Interface Circuit with Microcontroller
MSM4049
R1
R2
R3
R4
C1
C2
C3
C4
TONE
OUT
tt
168D
tid
tt ≥ 50 ms and 30 ms £ tid £ 3 s
VDD
R1
R2
R3
R4
C1
C2
C3
C4
VSS
Figure 1
6/12
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