© 2007 Fairchild Semiconductor Corporation

www.fairchildsemi.com

FAN3800 • Rev. 1.0.0

3

Pin Assignments

ID

MUTE

BYPASS

MIC+

MIC-

MICSUP

CPOUT

V-

SPKLOUT

VS

SPKROUT

D+

MLP-24

4x4mm

Figure 3. FAN3800 Pin Out

Pin Definitions

Pin #

Name

Type

Description

1

ID

Input

Identification pin

2

MUTE

Input

Microphone mute control input

3

BYPASS

Output

External 100nF capacitor used for pop/click suppression

4

MIC+

Input

High-side differential MIC input

5

MIC-

Input

Low-side differential MIC input

6

MICSUP

Output

Microphone supply pin

7

MICOUT

Output

Microphone amplifier output tap for setting gain and shifting the DC bias level

8

MICSW

Input

Output of microphone amplifier AC coupled to the D+ switch

9

GND

Input

IC ground

10

D-

Input

DC biased EMU bus input for send-end enable

11

SPKLIN

Input

Left audio channel input

12

SPKRIN

Input

Right audio channel input

Input

DC biased EMU bus input for identification

13

D+

Output

Driven by MICOUT in mono mode

14

SPKROUT

Output

Right speaker driver output

15

VS

Input

Supply input from host device (3.3V typical)

16

SPKLOUT

Output

Left speaker driver output

17

V-

Input

Filtered negative supply driven by CPOUT

18

CPOUT

Output

Charge pump unfiltered output

19

CP2

I/O

Charge pump external cap pin

20

CP1

I/O

Charge pump external cap pin

21

VS

Input

Supply input from host device (3.3V typical)

22

GND

Input

IC ground

23

V+

Output

Positive power supply output for decoupling capacitor

24

SW1

Input

Send-end switch input