FSA221 Ver la hoja de datos (PDF) - ON Semiconductor
Número de pieza
componentes Descripción
Fabricante
FSA221
ON Semiconductor
FSA221 Datasheet PDF : 19 Pages
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Pin Assignments
Vbus
10
D+
1
9
ASel
D-
2
8
D+/R
R
3
7
D-/L
L
4
6 Vaudio
5
GND
Figure 2. 10-Lead MicroPak™
D+ 1
D- 2
R3
L4
GND 5
10 Vbus
9 ASel
8 D+/R
7 D-/L
6 Vaudio
Figure 3. 10-Lead MSOP
L3
GND 4
Vaudio 5
R D-
21
10 D+
9 Vbus
6 7 8 ASel
D-/L D+/R
Figure 4. 10-Lead UMLP
Pin Descriptions
Name
Vaudio
Vbus
ASel
D+, D-
R, L
D+/R, D-/L
Description
Power supply (Audio)
Power supply (USB) and auto USB switch-path select
Audio select to override auto USB detect when VAUDIO supply is present
USB data bus input sources
Audio right and left input sources
USB and audio common connector ports
Truth Table
ASel(1)
Vaudio
Vbus
L, R
D+, D-
LOW
HIGH
LOW
LOW
HIGH(2)
HIGH(2)
HIGH(2)
LOW
HIGH(2)
LOW
HIGH(2)
HIGH(2)
OFF
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
Notes:
1. ASel - Internal resistor to GND provides auto-Vbus detect if there is no external connection. Forcing ASel HIGH
when VAUDIO is present overrides the USB path even if Vbus is present.
2. HIGH - Value is the threshold as defined to meet USB2.0 Vbus requirements and audio supply threshold in a
system (see DC Tables).
© 2006 Fairchild Semiconductor Corporation
FSA221 • Rev. 1.1.0
2
www.fairchildsemi.com
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