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CXA1878Q Datasheet

  • CXA1878Q

  • Dolby B-C Type Noise Reduction System with Recording/Playbac...

  • 1032.57KB

  • 36頁

  • SONY   SONY

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CXA1878Q
Dolby
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B-C Type Noise Reduction System with Recording/Playback Equalizer Amplifier
Description
The CXA1878Q is a bipolar IC with a built-in Dolby
B-C type noise reduction system (NR), Dolby S type
select switch, recording/playback equalizer, electronic
volume, and bias control circuit.
Use of this IC in combination with two CXA1417S/Q
completes a Dolby B-C-S type NR stereo system.
Features
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Dolby B-C type NR
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Built-in filter required for recording/playback equalizer
amplifiers
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Recording mute function
(requiring only an external time constant circuit to
implement soft mute)
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Fade in/out DC controllable
NORM/CrO
2
/METAL tape mode switching function
NORM/HIGH tape speed switching function
DC controllable for recording level calibration
(approximately 鹵6dB variable)
DC controllable for high frequency equalizer
amplifier gain (approximately 鹵4dB variable)
Playback deck A/B select switch
Recording volume control
Bias control circuit
Meter circuit
Structure
Bipolar silicon monolithic IC
Absolute Maximum Ratings
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Supply voltage
V
CC
64 pin QFP (Plastic)
17
V
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Operating temperature
Topr 鈥?0 to +75 擄C
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Storage temperature
Tstg 鈥?5 to +150 擄C
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Allowable power dissipation P
D
1020
mW
Operating Conditions
Supply voltage
(V
CC
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V
EE
) 鹵6.5 to 8.0
V
Applications
Recording/playback equalizer amplifier for stereo
analog cassette decks
(Applicable to ALPS ELECTRIC CO., LTD.
HADKH55 series heads)
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These ICs are available only to the licensees of Dolby Laboratories Licensing Corporation from whom licensing and applications
information may be obtained.
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鈥淒olby鈥?and the double D symbols are trade marks of Dolby Laboratories Licensing Corporation.
Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by
any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the
operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.
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E95933A5Z-PK

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