tp5088 National Semiconductor Corporation, tp5088 Datasheet - Page 4

• Manufacturer Part Number: tp5088
• Description: Tp5088 Dtmf Generator For Binary Data
• Manufacturer: National Semiconductor Corporation

Timing Diagram
Equivalent
Keyboard
X
A
B
C
D
1
2
3
4
5
6
7
8
9
0
FIGURE 2
D3
X
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
Data Inputs
D2
X
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
TABLE II Functional Truth Table
D1
X
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
TL H 5004 – 3
D0
X
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
4
Typical Application
ENABLE
TONE
Adjust R
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
0
E
for desired tone amplitude
f
L
697
697
697
770
770
770
852
852
852
941
941
941
697
770
852
941
0V
(Hz)
TONES OUT
FIGURE 3
f
H
1209
1336
1477
1209
1336
1477
1209
1336
1477
1336
1209
1477
1633
1633
1633
1633
0V
(Hz)
MUTE
O C
O C
O C
O C
O C
O C
O C
O C
O C
O C
O C
O C
O C
O C
O C
O C
0V
TL H 5004 – 4