243
Audio ICs
Dual recording / playback preamplifier
for radio cassette recorders
BA3420AL
The BA3420AL is dual recording/playback preamplifier for radio cassette players. It has an internal switch for switching
between playback head, mic, and radio input modes, and also includes a bias oscillator and regulated voltage source
for radio use.
All control is possible with one external switch, allowing designers to reduce the number of external components and
the size of their set designs.
Applications
Radio cassette recorders
Features
1) Internal three-mode input/output switch for playback
head, mic and radio modes.
2) Built-in bias oscillator and regulated voltage source
for radio use.
3) Control of the internal switch and regulated voltage
source is possible with one external switch.
4) Low distortion.
5) Low noise.
Absolute maximum ratings (Ta = 25 C)
Recommended operating conditions (Ta = 25 C)