21

22

23

24

LIN in

MIC in

PRE GND

Pin No.

Symbol

Description

s Pin Descriptions (cont.)

Line preamplifier input

Line receiver signals are input through a capacitor and a resistor to this pin, and then amplified to be

output from Pin18. The statuses of Pins7 and 8 enable or disable the signals. The input impedance

with ALC OFF is 10k

Ω.

MIC preamplifier input

MIC signals are input through a capacitor and a resistor to this pin, and then amplified to be output

from Pin18. The statuses of Pins7 and 8 enable or disable the signals. The input impedance with

ALC OFF is 10k

Ω.

Preamplifier internal regulated supply voltage output

This pin should be grounded through a 220

µF capacitor. The output voltage is typically 4.2V. The

output can be used as an ECM bias current source.

Preamplifier ground

This is the ground pin for the preamplifier circuits.

1

2

3

4

5

6

7

8

9

10

11

12

Loudspeaker amplifier power supply input

Loudspeaker amplifier output

Loudspeaker amplifier ground

Loudspeaker amplifier inverse input

Loudspeaker amplifier non-inverting input

Loudspeaker amplifier mute control

Preamplifier mute control

MIC/line preamplifier switching

REC/PLAY switching

VOX output

VOX detection control

Internal reference supply voltage output

Pin No.

Description

Pin No.

Description

13

14

15

16

17

18

19

20

21

22

23

24

Equalizer amplifier output

Equalizer amplifier inverting input

To the REC/PLAY head

REC gain control

VOX amplifier input

Preamplifier output

Preamplifier inverting input

ALC detection control

Line preamplifier input

MIC preamplifier input

Preamplifier internal regulated supply voltage output

Preamplifier ground

s Pin Descriptions