1998 Jan 08

17

Philips Semiconductors

Product specification

Versatile speech/dialler/ringer with

music-on-hold

TEA1069; TEA1069A

composed by transmitting 2 tones simultaneously at pin TONE. The frequency tolerance for the tones at output TONE

is shown in Table 4.

Table 4

DTMF frequency tolerances

DTMF FREQUENCY

FREQUENCY AT TONE

DEVIATION (%)

DEVIATION (Hz)

697

697.90

+0.13

+0.90

770

770.46

+0.06

+0.46

852

850.45

−0.18

−1.55

941

943.23

+0.24

+2.23

1209

1206.45

−0.21

−2.55

1336

1341.66

+0.42

+5.66

1477

1482.21

+0.35

+5.21

Fig.14 Timing diagram in tone dialling mode.

Note: in case of manual dialling only the minimum tone burst and pause time values depend on the chosen diode option, the maximum tone burst/pause

times are equal to the real key press/release time.

handbook, full pagewidth

MBH202

[3]

[3]

MUTE

KEYS

DP/FL

TONE

[recall]

[4]

tt

tp

tp + tholdover

tholdover

trc

tinterflash