U4488B Datasheet, PDF (7/9 Pages) TEMIC Semiconductors – Quasi-Split Sound Circuit and AM Demodulator

Internal Pin Configuration
1, 15
2 kΩ
10 kΩ
2 kΩ
10 kΩ
2.3 V
2, 16
13792
Figure 4. Sound IF inputs (Pins 1, 2 resp. 15,16)
U4488B
5
2.75 V
13798
Figure 7. Loop filter (Pin 5)
3
13796
Figure 5. AGC time constant (Pin 3)
4
4.25 V
3.5 V
13797
Figure 6. Internal reference voltage (Pin 4)
1.45 V
6
100 Ω
1 mA
IDC
Figure 8. AM output (Pin 6)
13799
3.5 V
17 kΩ
7 15.5 kΩ
23 kΩ
13800
Figure 9. AGC switch (Pin 7)
TELEFUNKEN Semiconductors
7 (9)
Rev. A2, 15-Jan-98
Preliminary Information