AN7352S Datasheet, PDF (1/3 Pages) Panasonic Semiconductor – Playback Pre-amplifier for Stereo Cassette Deck

ICs for Cassette, Cassette Deck
AN7352S
Playback Pre-amplifier for Stereo Cassette Deck
s Overview
The AN7352S is a bipolar IC developed as a playback
pre-amplifier of analogue cassette deck. Particularly in
order to support the automatic adjustment, it incorporates
various volume filter circuits and control functions. Also, it
has realized great reduction of external parts required.
s Features
• Variable volume circuits for playback gain adjustment
built-in
• Various equalizer switching circuit built-in
• Series mute circuit built-in
• MS (head locating) amp. comparator circuit built-in
s Pin Name
Pin No.
Pin Name
1 –VCC
2 PB T1 Input (R Ch.)
3 PB T2 Input (R Ch.)
4 PB NF Input (R Ch.)
5 120µ/ 70µ ( × 2) NF SW
6 120µ/ 70µ ( × 1) NF SW
7 PB Monitor Output
8 T1/ T2 LOGIC
9 120µ/ 70µ LOGIC
10 PB Output (R Ch.)
s Block Diagram
GND
28
27
26
25
Pin No.
Pin Name
11 Volume Control (R Ch.)
12 MS Input
13 +VCC
14 MS NF Input
15 MS Output
16 MS De-coupling
17 MS GND
18 Volume Control (L Ch.)
19 PB Output (L Ch.)
20 × 1/ × 2 LOGIC
24
23
22
21
20
Unit : mm
1
28
2
27
3
26
4
25
5
24
6
23
7
22
8
21
9
20
10
19
11
18
12
17
13
16
14
15
0.3
7.2±0.3
9.4±0.3
28-Lead SOP Package (SOP028-P-0375A)
Pin No.
Pin Name
21 P/R LOGIC
22 PB Monitor Output
23 120µ/ 70µ ( × 2) NF SW
24 120µ/ 70µ ( × 1) NF SW
25 PB NF Input (L Ch.)
26 PB T2 Input (L Ch.)
27 PB T1 Input (L Ch.)
28 GND
19
18
17
16
15
P/ R
× 1/
CTL
×2
22kΩ _47kΩ
–
+
1kΩ
+
–
T1/
120µ/
+–
T2
70µ
CTL
1
2
3
4
5
6
7
8
9
10
11
12
13
14
–VCC
+VCC