75T204-IP 데이터 시트보기 (PDF) - TDK Corporation
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75T204-IP Datasheet PDF : 9 Pages
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75T204
5V Low-Power Subscriber
DTMF Receiver
DTMF DIALING MATRIX
See Figure 3. Please note that column 3 is for special applications and is not normally used in telephone dialing.
Col 0
Row 0
1
Col 1
2
Col 2
3
Col 3
A
Row 1
4
5
6
B
Row 2
7
8
9
C
Row 3
*
0
#
D
FIGURE 3: DTMF Dialing Matrix
Analog
Input
D1, D2,
D4, D8
DV
ton
Tone burst 1
tD
toff
Pause
tR
Tone burst 2
tS
tH
FIGURE 4: Timing Diagram
4
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