SONY CXA1619BM/BS Standard Circuit Design Data (The pin numbers in the parenthesis are for CXA1619BS.) Voltage(V) No. Symbol Vcc=3 V Vcc=6V Equivalent circuit Description FM AM FM AM 1 GND 0 0 0 (1,2) 0 ② Phase-shift circuit Connect 2(3) FM DISCRI 2.182.704.885.43 ceramic discriminator 3(4)NF 1.51.53.03.0 Vcc Negative feedback pin ×100 ×100 27(28) AF OUT 1.51.53.0 3.0 GND Power amplifier output pin ④ 320kJ Connect variable resistor for 4(5) VOL CONT 1.251.251.251.25 electronic volume control. 80k ⑤ 5(6) AM OSC 1.251.251.251.25 3.6k AM local oscillation circuit 6(7） AFC 1.25 1.25 ⑧ AFC variable capacitor pin 1.25V 8(9) REG OUT 1.251.251.251.25 ⑥ (REG) Regulator pin 1.25 V(Typ.) ⑦ 7(8) FM OSC 1.251.251.251.25 FM local oscillation circuit -3-—3— CXA1619BM/BS Standard Circuit Design Data (The pin numbers in the parenthesis are for CXA1619BS.) Voltage (V) No. Symbol VCC=3 V VCC=6 V Equivalent circuit Description FM AM FM AM 1 (1, 2) 2 (3) 3 (4) 27 (28) 4 (5) 5 (6) 6 (7) 8 (9) 7 (8) GND FM DISCRI NF AF OUT VOL CONT AM OSC AFC REG OUT FM OSC 0 0 0 0 2.18 2.70 4.88 5.43 1.5 1.5 3.0 3.0 1.5 1.5 3.0 3.0 1.25 1.25 1.25 1.25 1.25 1.25 1.25 1.25 1.25 ∗ 1.25 ∗ 1.25 1.25 1.25 1.25 1.25 1.25 1.25 1.25 2 1k 1.2k 3 27 VCC GND ×100 ×100 4 GND 20k 80k 5 3.6k 6 8 1.25V (REG) 7 Phase-shift circuit Connect ceramic discriminator Negative feedback pin Power amplifier output pin Connect variable resistor for electronic volume control. AM local oscillation circuit AFC variable capacitor pin Regulator pin 1.25 V (Typ.) FM local oscillation circuit