tp5089 National Semiconductor Corporation, tp5089 Datasheet - Page 4

• Manufacturer Part Number: tp5089
• Description: Dtmf Touch-tone Generator
• Manufacturer: National Semiconductor Corporation

Functional Description
Note 1 X is don’t care state
Note 2 V
SINGLE TONE
INHIBIT
OS
X
X
X
X
1
1
1
0
0
0
is the output offset voltage
Group
Group
Group
Tone
High
Low
f
f
L
H
DISABLE
TONE
(Continued)
O
X
Input
0
1
1
1
1
1
1
1
Valid
R1
R2
R3
R4
C1
C2
C3
C4
TABLE I Output Frequency Accuracy
TABLE II Functional Truth Table
FIGURE 2 Typical Application
Adjust R
DTMF (Hz)
Standard
2 or More
2 or More
2 or More
1209
1336
1477
1633
2 or More
697
770
852
941
ROW
O C
O C
One
One
One
One
E
for desired tone amplitude
4
Tone Output
Frequency
1206 0
1331 7
1486 5
1639 0
694 8
770 1
852 4
940 0
COLUMN
2 or More
2 or More
2 or More
2 or More
O C
O C
One
One
One
One
from Standard
% Deviation
Low
V
V
V
V
V
b
a
a
b
b
b
a
a
0V
0V
f
f
OS
OS
OS
OS
OS
TONE OUT
L
L
0 32
0 02
0 03
0 11
0 24
0 32
0 64
0 37
High
V
V
V
V
V
0V
0V
f
f
OS
OS
OS
OS
OS
H
H
MUTE
O C
O C
O
O
O
O
O
O
O
O
TL H 5057 – 3