cxa1897q Sony Electronics, cxa1897q Datasheet - Page 8

• Manufacturer Part Number: cxa1897q
• Description: Dolby B Type Noise Reduction System With Recording/playback Equalizer
• Manufacturer: Sony Electronics

Pin
No.
21 FP CAL
35 IREF
22 GP CAL
29 REC MUTE
33 AGC TC
34 VG
Symbol
DC
voltage
1.2V
1.2V
0.0V
4.0V
—
I/O
—
—
—
—
I
I/O
resistance
60k
—
—
—
—
34
29
33
21
35
GND
GND
Vcc
GND
Vcc
Vcc
GND
22
Vcc
147
200
GND
147
Vcc
147
45k
2
Equivalent circuit
2
147
30k
30k
—8—
2
147
2
GND
2
500
500
2
20k
GND
GND
GND
50 A
2
100k
GND
5k
30k
20k
2
Vcc
4
2
Vcc
500
500
Vcc
Vcc
Vcc
2.7V
200
V
S
G
Connects the resistor to
determine the high-band peak
frequency of the recording
equalizer.
Reference setting resistance
is 27k .
Connects the 12k
determine each gain of the
equalizers.
Connects the resistor to
determine the high-band peak
gain of the recording
equalizer.
Reference setting resistance
is 27k .
Recording mute ON/OFF
selector switch.
Low : Muting ON
High :Muting OFF
Connects the resistor and
capacitor to determine the
attack and recovery time
constants of the AGC.
Signal reference voltage.
Connects the capacitor for
eliminating ripple.
Fader function can be
achieved with an external
time constant circuit.
Description
resistor to
CXA1897Q