FSA221(2006) データシートの表示（PDF） - Fairchild Semiconductor
部品番号
コンポーネント説明
メーカー
FSA221
(Rev.:2006)
(Rev.:2006)
Fairchild Semiconductor
FSA221 Datasheet PDF : 18 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-Pin MicroPak
D+ 1
D- 2
R3
L4
GND 5
10 Vbus
9 ASel
8 D+/R
7 D-/L
6 Vaudio
Figure 3. 10-Pin MSOP
L3
R D-
21
10 D+
GND 4
9 Vbus
Vaudio 5 6 7
8 ASel
D-/L D+/R
Figure 4. 10-Pin µMLP
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-
L
L
L
OFF
OFF
L
L
H(2)
OFF
ON
L
H(2)
L
ON
OFF
L
H(2)
H(2)
OFF
ON
H
L
L
OFF
OFF
H
L
H(2)
OFF
ON
H
H(2)
L
ON
OFF
H
H(2)
H(2)
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. H - 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. 1.0.3
2
www.fairchildsemi.com
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