cxa1878q Sony Electronics, cxa1878q Datasheet - Page 6

• Manufacturer Part Number: cxa1878q
• Description: Dolby B-c Type Noise Reduction System With Recording/playback Equalizer Amplifier
• Manufacturer: Sony Electronics

No.
Pin
13
14
15
16
17
18
BIAS M
BIAS C
BIAS N
AMS SW
PASS SW
METER SW
Symbol
Typical pin voltage
when
open
when
open
2.5V
2.5V
DC
—
—
AC
—
—
—
—
I/O Z (in)
O
I
I
I
—
—
—
—
17
16
18
– 6 –
50k
50k
13
15
14
5k
5k
10k
Equivalent circuit
5k
5k
24k
100k
DGND
DGND
DGND
Recording bias control
voltage output
AMS mode control
PASS mode control
Meter mode control
Mode select switch for
AMS/BS amplifier
High: BS mode
Medium: AMS mode
Low: AMS/BS OFF mode
[BS mode = Music
signal interval detection
during playback]
[AMS mode = Music
signal detection during
FF/REW]
H : PASS
M : MUTE
L : NR ON
Meter amplifier output
ON/OFF select switch
High: Meter output
Low : Meter output ON
Description
OFF (mute)
CXA1878Q