© 2009 Fairchild Semiconductor Corporation

www.fairchildsemi.com

FSA2000

• Rev. 1.0.0

2

Pin Descriptions

Pin #

Name

Type

Description

1

D+

I/O

USB D+ port from processor or transceiver

2

D-

I/O

USB D- port from processor or transceiver

3

R

Input

Right audio channel input

4

L

Input

Left audio channel input

5

Audio Supply

Supply voltage for audio amplifiers, charge pump, and audio control; not required for USB path

6

MUTE

Input

Control pin intended to be used temporarily to quiet transients on the audio path upon transition of

/SHDN. Ground if not being used.

7

/SHDN

Input

8

GND

GND

IC ground

9

D-/L

I/O

Common USB/Audio Port; USB D- data to connector or left audio channel output

10

D+/R

I/O

Common USB/Audio Port; USB D+ data to connector or right audio channel output

11

Input/Supply

USB input select pin and USB supply

12

V+

Node

Node for filtering internal positive amplifier rail; suggest 1µF to GND

13

V-

Input

Negative amplifier rail input; suggest 1µF to GND. Requires connection to CPO.

14

CPO

Output

Charge pump output used to drive V-, suggest 2.2 µF to GND for filtering.

15

CM

I/O

Charge pump negative flying capacitor pin; connect to CP via storage capacitor, typically 1µF.

16

CP

I/O

Charge pump positive flying capacitor pin; connect to CM via storage capacitor ,typically 1µF.

Pin Configuration

Figure 2. FSA2000UMX (Top View)

1

5

6

7

8

9

10

11

2

3

12

16

15

14

13

4

V-

V+

+

-

3M

Ω

Audio / Click & Pop Control

CP

CM

CPO

V-

V+

V

BUS

D+/R

D-/L

V

CC

MUTE

/SHDN

GND

D+

D-

R

L

V-

V+

+

-

Charge Pump

& Voltage

Regulator