U3810BM Datasheet, PDF (17/31 Pages) TEMIC Semiconductors – Multi Standard Feature Phone Integrated Circuit

TELEFUNKEN Semiconductors
U3810BM
Table 1: Frequency tolerance of the output tones for DTMF signalling tone output frequency when using 455 kHz
Standard frequency
Hz
Low Group
697
770
852
941
Tone output
frequency
Hz
697.85
771.18
852.06
940.08
Frequency deviation
%
Hz
0.12
0.15
0.01
– 0.10
+ 0.85
+ 1.18
+ 0.06
– 0.92
High Group
1209
1210.1
0.09
+ 1.1
1336
1338.2
0.17
+ 2.2
1477
1477.3
0.02
+ 0.3
1633
1636.7
0.22
+ 3.7
Note: Frequency can be directly measured on CO when S3 is closed (figure 9)
AMF
1
0
0
0
SIN0
1
1
1
0
SIN1
1
1
0
1
CO
DTMF : HF
DTMF : LF
MELODY
CONFIDENCE TONE
1209
1336
1477
1633
697
1
2
3
A
770
4
5
6
B
852
7
8
9
C
941
*
0
#
D
Rev. A1: 19.01.1996
17 (31)