tea1069n NXP Semiconductors, tea1069n Datasheet - Page 22

• Manufacturer Part Number: tea1069n
• Description: Versatile Speech/dialler/ringer With Music-on-hold
• Manufacturer: NXP Semiconductors

Philips Semiconductors
K
Every time a valid key is pressed a keytone is generated
with a frequency of 606 Hz and a duration of 30 ms. This
function is selected by the diode GOS = off. KT/EARTH is
LOW when V
when RESET is HIGH.
V
Both pins can control the volume of the ringer and/or the
hands-free circuit. The state of VOL1/VOL2 is controlled
by a state machine as depicted in Fig.24.
VOL1 and VOL2 are push-pull outputs. Both are set LOW
when V
RESET is HIGH.
M
When the dialler is in the hold state (see Fig.23) a melody
is generated via pin TONE. In this state pin MOH/DMO can
be used via diode GOS = off as an enable signal for the
hardware to indicate that the tone should be switched to
the telephone line.
MOH/DMO is a push-pull output. It is set LOW when V
is below power-on reset trip level and when RESET is
HIGH.
1998 Jan 08
handbook, full pagewidth
EY TONE
OLUME CONTROL
USIC
Versatile speech/dialler/ringer with
music-on-hold
-
ON
DD
:
-
HOLD
is below power-on reset trip level and when
PIN
DD
KT/EARTH
:
is below power-on reset trip level and
PIN
:
PINS
MOH/DMO
VOL1
AND
Fig.21 TEA1069 and TEA1069A dialler/ringer states.
VOL2
RINGER
ringer signal
ringer invalid
off-hook/[HOOK]
DD
STANDBY
power-on
22
H
During the on-line state, the hands-free output pin HF is
used for enabling the hands-free hardware. The pin will
change state depending on specific key-sequences
(see Fig.23).
HF is a push-pull output. It is set LOW when V
power-on reset trip level and when RESET is HIGH.
HOLD
One way to terminate the hold state (see Fig.23) is a
change in state of the signal at pin HOLD. This input
should reflect the line current. If current is flowing the
signal at pin HOLD should be HIGH, if not it should be
LOW.
This pin is not debounced. The signal applied should be
filtered by the hardware. HOLD is HIGH when V
power-on reset trip level and when RESET is HIGH.
Key sequences
The behaviour of the TEA1069 and TEA1069A can be
modelled as a State Transition Diagram (STD) shown in
Fig.21.
ANDS
on-hook/[HOOK]
-
MODE
FREE
off-hook/[HOOK]
:
:
PIN
PIN
ON-LINE
HF
HOLD
MBH209
TEA1069; TEA1069A
Product specification
DD
DD
is below
is below