tea1069n NXP Semiconductors, tea1069n Datasheet - Page 18

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

Philips Semiconductors
R
The RECALL function results in a calibrated pulse which drives the electronic line current interrupter via pin DP/FL or
KT/EARTH. Flash or earth selection and various flash interruption times depend on the diode options: FES A and FES B
(diode GOS = on; see Fig.15).
K
The sense columns inputs and scanning rows outputs are
directly connected to a single contact keyboard matrix.
A second key entry will be valid after having released the
first button and after having pressed the second button.
Simultaneously pressing 2 buttons will disable the first
entered key. A key entry becomes valid when the
debounce time t
1998 Jan 08
handbook, full pagewidth
EYBOARD
EGISTER RECALL
Versatile speech/dialler/ringer with
music-on-hold
t
t
t
t
kd
holdover
idp
interflash
= key pressed time (depends on user).
a. Recall using flash; t
= interdigit pause time.
DP/FL
MUTE
recall
= hold-over time.
KEY
= interflash hold-over time (only for TEA1069A).
:
PINS
d
ROW1
:
t kd
has elapsed.
PINS
DP/FL
t rc
TO
ROW5
rc
AND
= recall time using flash.
AND
KT/EARTH
t holdover
COL1
Fig.15 Recall mode timing diagram.
TO
t interflash
COL6
18
KT/EARTH
The column and row pins (except ROW5) are HIGH when
V
HIGH.
ROW5 is an open-drain input/output; this configuration is
used to avoid current flowing in the on-line or standby
state. A pull-up resistor should be connected to ROW5.
ROW5 is LOW when V
and when RESET is HIGH.
DD
MUTE
recall
b. Recall using earth; t
KEY
is below power-on reset trip level and when RESET is
t kd
t ea
DD
TEA1069; TEA1069A
is below power-on reset trip level
ea
= recall time using earth.
t holdover
Product specification
t idp
MBH203