Philips Semiconductors
Versatile speech/dialler/ringer with
music-on-hold
Product specification
TEA1069; TEA1069A
handbook, full pagewidth KEYS
MUTE
DP/FL
MOH/DMO
[3]
[recall]
[4]
tb
tm
tidp
trc
tm + tholdover
tinterflash
tholdover
MBH201
tb = break time.
tm = make time.
tidp = interdigit pause time.
trc = recall time.
tholdover = hold-over time.
tinterflash = interflash hold-over time (only for TEA1069A).
Fig.13 Timing diagram in pulse dialling mode.
TONE DIALLER: PINS TONE AND MUTE
In this system digits are transmitted as two tones
simultaneously, the so called Dual-Tone Multi-Frequency
(DTMF) system. Tone digits are separated by a pause
time. Valid keys are the digits [0] to [9], [∗], [#] and
[PAUSE].
The DTMF dialling mode, the tone burst/pause times and
the access pause time depend on the diode options: PTS,
TBT, APT and APT2.
The MUTE pin is an open drain output which requires a
pull-up resistor. MUTE is HIGH when VDD is below
power-on reset trip level and when RESET is HIGH.
Figure 14 shows the timing diagram in tone dialling mode
when successively keys [3], [3], [RECALL] and [4] are
dialled.
1998 Jan 08
16