ba3708f ROHM Co. Ltd., ba3708f Datasheet - Page 5

• Manufacturer Part Number: ba3708f
• Description: Mute Detector Ic For 3v Sets
• Manufacturer: ROHM Co. Ltd.

(3)
To prevent incorrect detection due to noise between
songs, a song detect function has been included. With
this function, the plunger activate pulse is only output
when the input signal is longer than the song detect time
T
signals shorter than T
ue of the capacitor C
for the relation between C
If Pin 6 is connected to ground, the mute circuit will oper-
ate and song detection will stop. In this case, the value
of the input resistor connected to Pin 3 will be smaller
(approximately 1k ), and this will prevent the increase of
crosstalk between the left and right channels.
FElectrical characteristic curves
742
Audio ICs
C
, and therefore a song. A pulse is not output for noise
Song detect time T
C
C
. The length of TC is set by the val-
connected to Pin 6. (See Fig. 18
C
and mute circuit
C
and T
C
.)
(4)
The output circuit is an open collector which is suitable
for mechanical systems where the plunger is on during
song selection. The pulse width T
duty cycle is 30%, and drive is possible up to an output
current I
mute function operates. A discharge diode must be add-
ed in parallel with the plunger solenoid.
Output circuit
OUT
= 100mA. The output is OFF (high) while the
W
is 200 ms and the
BA3708F