—3—

CXA1619AM/AS

Standard Circuit Design Data

(The pin numbers in the parenthesis are for CXA1619AS.)

Voltage (V)

No.

Symbol

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

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