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ROHM Semiconductor - Mute detector IC

Numéro de référence BA338L
Description Mute detector IC
Fabricant ROHM Semiconductor 
Logo ROHM Semiconductor 





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BA338L fiche technique
Audio ICs
Mute detector IC
BA336 / BA338 / BA338L
The BA336, BA338 and BA338L are monolithic ICs designed for mute detection and tape end detection. When a duration
of silence (52dBm or less) exceeds the time constant set with an external CR circuit, a song gap is identified, and after
this a plunger control signal is output during a pulse whose width is determined by another external CR circuit. These
functions are contained in a compact 9-pin package.
The circuit configuration consists of a pre-amp with limiter, a comparator flip-flop, and a driver. Circuitry is also included
which prevents errors when the power is turned on, and measures have been taken to prevent errors due to excessive
input, song gap noise, and other factors.
FApplications
Mute detection
Tape end detection
FFeatures
1) Mute detection time and output pulse width can be
set within a broad range by an external CR circuit.
2) Includes circuit for preventing errors due to song gap
noise.
3) Includes over-current protection circuit.
4) Includes circuit for preventing errors when the power
is turned on.
5) Detection can be stopped using an external input.
FAbsolute maximum ratings (Ta = 25_C)
FRecommended operating conditions (Ta = 25_C)
726

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